Which choice correctly expresses the number below in scientific notation?
0.000607

Which Choice Correctly Expresses The Number Below In Scientific Notation?0.000607

Answers

Answer 1

Answer:

Correct answer is: E

Step-by-step explanation:


Related Questions

Swornima is an unmarried nurse in a
hospital. Her monthly basic salary is Rs
48,000. She has to pay 1% social
security tax on her income up to Rs
5,00,000 and 10% income tax on Rs
5,00,001 to Rs 7,00.000. She gets 1
months' salary as the Dashain
allowance. She deposits 10% of her
basic salary in Citizen Investment Trust
(CIT) and gets 10% rebate on her
income tax. Answer the following
questions. (i) What is her annual
income? How much tax is rebated to
her? (iii) How much annual income tax
should she pay?

Answers

To calculate Swornima's annual income and the amount of tax she should pay, let's break down the information provided:

Monthly basic salary: Rs 48,000

Social security tax rate: 1%

Income tax rate on income up to Rs 5,00,000: 0% (no tax)

Income tax rate on income from Rs 5,00,001 to Rs 7,00,000: 10%

Dashain allowance: 1 month's salary

Deposit in Citizen Investment Trust (CIT): 10%

Rebate on income tax: 10%

(i) Annual Income:

Swornima's monthly basic salary is Rs 48,000, so her annual basic salary would be:

Annual Basic Salary = Monthly Basic Salary x 12

= Rs 48,000 x 12

= Rs 5,76,000

Additionally, she receives 1 month's salary as the Dashain allowance, which we can add to her annual income:

Annual Income = Annual Basic Salary + Dashain Allowance

= Rs 5,76,000 + Rs 48,000

= Rs 6,24,000

Swornima's annual income is Rs 6,24,000.

(ii) Tax Rebate:

Swornima receives a 10% rebate on her income tax. To calculate the rebate, we need to determine her income tax first.

(iii) Annual Income Tax:

First, let's calculate the income tax for the range of income from Rs 5,00,001 to Rs 7,00,000. The tax rate for this range is 10%.

Taxable Income in this range = Rs 6,24,000 - Rs 5,00,000

= Rs 1,24,000

Income Tax in this range = Taxable Income x Tax Rate

= Rs 1,24,000 x 0.1

= Rs 12,400

Now, let's calculate the total annual income tax:

Total Annual Income Tax = Income Tax in the range Rs 5,00,001 to Rs 7,00,000

= Rs 12,400

Next, we calculate the rebate on income tax:

Tax Rebate = Total Annual Income Tax x Rebate Rate

= Rs 12,400 x 0.1

= Rs 1,240

Swornima's annual income tax is Rs 12,400, and she receives a tax rebate of Rs 1,240.

To summarize:

(i) Swornima's annual income is Rs 6,24,000.

(ii) Swornima's tax rebate is Rs 1,240.

(iii) Swornima should pay an annual income tax of R

1. Let the test statistics Z have a standard normal distribution when H0 is true. Find the p-value for each of the following situations:
a) H1:μ>μ0,z=1.88
b) H1:μ<μ0,z=−2.75
c) H1:μ≠μ0,z=2.88
2. Let the test statistics T have t distribution when H0 is true. Find the p-value for each of the following situations (provide an interval if the exact one cannot be found using a table):
a) H1:μ>μ0,n=16,t=3.733
b) H1:μ<μ0,df=23,t=−2.500
c) H1:μ≠μ0,n=7,t=−2.250

Answers

Answer:

1 a  \(p -value = 0.030054\)

1b   \(p -value = 0.0029798\)

1c  \(p -value = 0.0039768\)  

2a  \(p-value = 0.00099966\)

2b  \(p-value = 0.00999706\)

2c  \(p-value = 0.0654412\)

Step-by-step explanation:

Considering question a

  The alternative hypothesis is H1:μ>μ0

   The test statistics is  z =1.88

Generally from the z-table  the  probability of   z =1.88 for a right tailed test is

    \(p -value = P(Z > 1.88) = 0.030054\)

Considering question b

  The alternative hypothesis is H1:μ<μ0

   The test statistics is  z=−2.75

Generally from the z-table  the  probability of   z=−2.75 for a left tailed test is

    \(p -value = P(Z < -2.75) = 0.0029798\)

Considering question c

  The alternative hypothesis is H1:μ≠μ0

   The test statistics is  z=2.88

Generally from the z-table  the  probability of  z=2.88 for a right  tailed test is

    \(p -value = P(Z >2.88) = 0.0019884\)    

Generally the p-value for the two-tailed test is

    \(p -value = 2 * P(Z >2.88) = 2 * 0.0019884\)    

=> \(p -value = 0.0039768\)  

Considering question 2a

    The alternative hypothesis is H1:μ>μ0

     The sample size is  n=16

     The  test statistic is  t =  3.733

Generally the degree of freedom is mathematically represented as

        \(df = n - 1\)

=>     \(df = 16 - 1\)

=>     \(df = 15\)

Generally from the t distribution table  the probability of   t =  3.733 at a degree of freedom of  \(df = 15\) for a right tailed test is  

       \(p-value = t_{3.733 , 15} = 0.00099966\)

Considering question 2b

    The alternative hypothesis is H1:μ<μ0

     The degree of freedom is df=23

     The  test statistic is ,t= −2.500

Generally from the t distribution table  the probability of   t= −2.500 at a degree of freedom of  df=23 for a left  tailed test is  

       \(p-value = t_{-2.500 , 23} = 0.00999706\)

Considering question 2c

    The alternative hypothesis is H1:μ≠μ0

     The sample size is  n= 7

     The  test statistic is ,t= −2.2500

Generally the degree of freedom is mathematically represented as

        \(df = n - 1\)

=>     \(df = 7 - 1\)

=>     \(df = 6\)

Generally from the t distribution table  the probability of   t= −2.2500 at a degree of freedom of  \(df = 6\) for a left   tailed test is  

       \(t_{-2.2500 , 6} = 0.03272060\)

Generally the p-value  for t= −2.2500 for a two tailed test is

     \(p-value = 2 * 0.03272060 = 0.0654412\)

what is the measure of EFD?​

what is the measure of EFD?

Answers

The measure 108 degrees.

I got my answer by dividing 540 by 5. This gave me the measure of EFD

Answer:

its a 90% angle for this question

is (3 + 5) + 4 = 3 + (5 + 4) a Multiplicative Identity

Answers

No, it is not because a Multiplicative identity is an identity element that in a given mathematical system leaves unchanged any element by which it is multiplied.

a medical researcher wants to determine whether exercising can lower blood pressure. she recruits 100 people with high blood pressure to participate in the study. she assigns a random sample of 50 of them to pursue an exercise program that includes daily swimming and jogging. she assigns the other 50 to refrain from vigorous activity. she measures the blood pressure of each of the 100 individuals both before ad after the study. press space or enter to grab observational study a medical researcher wants to determine whether exercising can lower blood pressure. at a health fair he measures the blood pressure of 100 individuals and interviews them about their exercise habits. he divides the individuals into two categories: those whose typical level of exercise is low and those whose level of exercise is high. press space or enter to grab randomized experiment to determine the effectiveness of a new pain reliever a randomly chosen group of pain sufferers is assigned to take the new drug and another randomly chosen group is assigned to take a placebo. press space or enter to grab randomized experiment to assess the effectiveness of a new method for teaching arithmetic to elementary school children a simple random sample of 30 first graders was taught with the new method and another simple random sample of 30 first graders was taught with the currently use method. at the end of eight weeks the children were given a test to assess their knowledge. the press space or enter to grab observational study researchers examine the association between the fluoridation of water and the prevention of tooth decay by comparing the prevalence of tooth decay in countries that have fluoridated water with the prevalence in countries that do not.

Answers

The study described is a randomized experiment.

A randomized experiment is a typical experimental study design. It is a study design in which the researcher or investigator is in complete control of the research environment. For example, an investigator may wish to assess the effects of certain treatments on some experimental units.

The investigator decides the type of treatment, the type of experimental unit to use, and the allocation and assessment procedures of the treatments and effects, respectively, while in an observational study, the researcher or investigator is usually a passive observer as he only observes and analyses facts and events as they occur naturally.

In experimental studies, the researcher is in complete control of the exposure, and the result should therefore provide stronger evidence of an association or lack of association between exposure and a health problem than would an observational study.  

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"Determine whether the study described below is a randomized experiment or an observational study.

A medical researcher wants to determine whether exercise can lower blood pressure. She recruits 100 people with high blood pressure to participate in the study. She assigns a random sample of 50 of them to pursue an exercise program that includes daily swimming and jogging. She assigns the other 50 to refrain from vigorous activity. She measures the blood pressure of each of the 100 individuals both before and after the study."--

What is 1 2/3 - (-5 2/3)?

• 6 1/3
• 6 2/3
• 7 1/3
• 7 2/3

Answers

Step-by-step explanation:

What we'll be using:

The integer rule.

Rule: When a positive number is being subtracted by a negative number, the negative number changes to a positive.

Implying the rule:

\(1 \frac{2}{3} + 5 \frac{2}{3}\)

Add:

\(1 \frac{2}{3} + 5 \frac{2}{3} = 7 \frac{1}{3} \)

Third option is correct.

Which image(s) represent similar figures (choose all that apply)


Please help me I appreciate it thank you so much

Which image(s) represent similar figures (choose all that apply)Please help me I appreciate it thank

Answers

B & C since both of them are like triangle figures.

Answer:

B and C because all of them are equal

I will mark you brainiest!

A) 11
B) 13.3
C) 15.3
D) 15

I will mark you brainiest!A) 11B) 13.3C) 15.3D) 15

Answers

Answer:

B) 13.3

-----------------------

Given two similar triangles:

ΔABC ~ ΔAMN

We know similar figures have same ratio of corresponding sides.

Apply this to the given triangles to get:

AB/AM = AC/AN(AM + MB)/AM = AC/AN

Substitute values:

(6 + 4)/6 = AC/810/6 = AC/8AC = 8*10/6AC = 13.3 (rounded)

The matching choice is B.

what is this equation????
m=y2-y1\y2-y1​

Answers

Answer:

Are you sure it ia not x2 - x1 in the denominator?

Answer:

x=2-y

Step-by-step explanation:

Root (2,0)

Vertical intercept (0,2)

Last week, a share stock gained a total of 1.64 points. Express this gain as a mixed number in simplest form.

Answers

Answer: \(1\frac{16}{25}\)

Step-by-step explanation:

1.64 is 1 64/100. Now to get the simplest form find a number you can divide both the numerator and the denominator by, like 4. Now you have 1 16/25. 16 and 25 do not have a common number you can divide both by so it is the simplest form.

Between which two consecutive integers does \(\sqrt138\)lie?

Answers

The square root of 138 lies between 11 and 12, as 11²=121 and 12²=144.

What is number?

Number is a mathematical object used to count, measure, and label. Numbers are used in almost every field of mathematics and science, including algebra, calculus, geometry, physics, and computer science. Numbers can also be used to represent data, such as population, income, temperature, or time. In addition, numbers are used to represent abstract concepts, such as love, truth, beauty, and justice.

This is because the square root of a number is the number that, when multiplied by itself, produces the original number. Therefore, to find the square root of 138, we need to identify two consecutive integers such that one of them squared is smaller than 138 and the other squared is larger than 138.

To do this, we can work our way up from the integer closer to 0, in this case 11. 11 squared is 121, which is smaller than 138, so we know that the square root of 138 must be between 11 and a larger integer. Then, if we square 12, we get 144, which is larger than 138. Therefore, we can definitively say that the square root of 138 lies between 11 and 12.

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The square root of 138 lies between 11 and 12, as 11² is 121 and 12² is 144.

What is number?

Number is a mathematical object used to count, measure, and label. Numbers are used in almost every field of mathematics and science, including algebra, calculus, geometry, physics, and computer science. Numbers can also be used to represent data, such as population, income, temperature, or time. In addition, numbers are used to represent abstract concepts, such as love, truth, beauty, and justice.

To calculate this, we can divide 138 by 11 and 12, and see which integer is closer to the answer.

138 divided by 11 is 12.545454545454545454545454545455.
138 divided by 12 is 11.5.

Since 11.5 is closer to the answer, the square root of 138 lies between 11 and 12.

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3x² + 3y² + 6x - 12 y = 6
Convert to standard form

Answers

Answer:

(y+2)²-(x+1)²/1=1

Step-by-step explanation:

No Clue what this is so I looked it up✓

JOSON Ortiz Budgeting Basics with Autumn Autumn is 22 years old and works as a checker at a local grocery store. Autumn lives in an apartment she shares with two other roommates. Autumn's take-home pay from her job is $1275.00 per month. Add this amount to her bank registry below. Here is a list of how Autumn will be budgeting her money this month. Move the expenses over to the bank registry and deduct them from the balance. Rent - $400.00 Utilities- $75.00 Cell Phone - $80.00 Subway Pass - $120.00 Groceries - $200.00 Work Clothes- $100.00 Entertainment $100.00 Savings $200.00 Transaction Paycheck Withdrawal Deposit Ending Balance Balance​

Answers

Autumn's bank registry will be :

Transaction Amount Balance

Paycheck $1275.00 $1275.00

Rent $400.00 $875.00

Utilities $75.00 $800.00

Cell Phone $80.00 $720.00

Subway Pass $120.00 $600.00

Groceries $200.00 $400.00

Work Clothes $100.00 $300.00

Entertainment $100.00 $200.00

Savings $200.00 $0.00

How to explain the information

As you can see, Autumn has $0.00 left over at the end of the month. This means that she is spending more money than she is earning. In order to create a budget that works for her, Autumn will need to find ways to cut back on her expenses. Some possible areas where she could cut back include:

Autumn could look for a cheaper apartment or move in with more roommates. Autumn could turn off lights and appliances when she's not using them and seal up any cracks or holes in her apartment to keep the heat in during the winter and the cool air in during the summer.

By cutting back on her expenses, Autumn can create a budget that works for her and save money for the future.

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How tall is the tree?
5ft
35°
-20ft-
[?]ft
Round to the nearest foot.

Answers

Answer:

19

Step-by-step explanation:

tan35=x/20

20tan35=x

x=14.0041507641942

x+5=19.0041507641942

The nearest foot is 19

Without multiplying, how can you tell which product will be greater, 3 x 4 or 6 x 2?

Answers

Answer:

we can compare 4 x 3 and 2 x 6, equal to 12. So, we can see that both products are similar and neither is greater.

Step-by-step explanation:

We can use the commutative property of multiplication to see that 3 x 4 is the same as 4 x 3 and 6 x 2 is the same as 2 x 6. When multiplying two numbers, the order of the numbers does not affect the product. Therefore, we can compare 4 x 3 and 2 x 6, equal to 12. So, we can see that both products are similar and neither is greater.

NEED MORE EXPLANATION?

The commutative property of multiplication states that when multiplying two numbers, the order of the numbers does not affect the product. This means that 3 x 4 is the same as 4 x 3, and 6 x 2 is the same as 2 x 6. We can use this property to compare 4 x 3 and 2 x 6, equal to 12. Therefore, we can see that both products are identical and neither is greater.

100 POINTSS!!! Can someone help me real quick? Only answer if you’re confident that it’s right please :)

100 POINTSS!!! Can someone help me real quick? Only answer if youre confident that its right please :)

Answers

Answer:

I think its uh

Step-by-step explanation:

the first= it is. f= 3x+3/x^2

the second= it is. f= x-3/x^2

sorry if this is wrong btw, i tried my best U-U

Answer:

they're not inverses.

Step-by-step explanation:

the inverse of f(x)= 3/x +3 would be f(x) 3 / x-3

for the second equation the inverse of that one would be h(x) = -3/ x-1

i hope this helps.

.
+ 1687 – 1575 - 287 = 4808

Answers

Answer:

 google

Step-by-step explain

Google is key

Which ordered pair makes both inequalities true? y > –2x + 3 y < x – 2 On a coordinate plane, 2 straight lines are shown. The first solid line has a positive slope and goes through (0, negative 2) and (2, 0). Everything to the right of the line is shaded. The second dashed line has a negative slope and goes through (0, 3) and (1, 1). Everything to the right of the line is shaded. (0,0) (0,–1) (1,1) (3,0) Mark this and return

Answers

Answer:

D

Step-by-step explanation:

(3,0)

Answer:

D. (3.0)

Step-by-step explanation:

I can confirm this is the correct answer because I just did the test and got it correct.

2- = - 6 – 4.0
Solve for x:

Answers

Answer:

Step by Step explanation

to meet slope constraint rhonda wants to change the height of the zip-line 7 ft and end at a height 9 ft above the ground
Test Rhonda’s claim

Answers

All the three locations has been checked below.

Using Pythagoras theorem,

12² = 8² + x²

144 - 64 = x²

x= √80

x=8.9

Now, using Trigonometry

tan F = P/B

tan F= 8/8.9

and, sin F = P/H

      sin F= 8/12 = 2/3

and, cos F = B/H

        cos F= 12/8.9

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Scientists can measure the depths of craters on the moon by looking at photos of shadows. The length of the shadow cast by the edge of a crater is 500 meters. The angle of elevation of the rays of the Sun is 55°. Estimate the depth d of the crater to the nearest tenth.

d ≈ _{type in answer}_

Scientists can measure the depths of craters on the moon by looking at photos of shadows. The length

Answers

The estimated depth of the crater is given as 714.1 m

How to solve for the depth

we have the value of θ = tan 55 degrees

the depth of the crater is given as d. This value is unknown

L is the length of this shadow that has been cast. This is given as 500 meters

θ = Opposite / adjacent

d / 500 = tan 55 degrees

from this stage we would have to cross multiply

d = 500 * tan 55

d = 500 * 1.428148

d = 714.07 meters.

Hence the depth of the crater to the nearest tenth is given as 714.1 meters.

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A survey of 800 randomly selected adults in a certain country found that 82% believed that
protecting the rights of those with unpopular views is a very important component of a strong
democracy.
a. Verify the Central Limit Theorem conditions.
b. Find a 95% confidence interval for the proportion of adults in the country who believe that
protecting the rights of those with unpopular views is a very important component of a strong
democracy.
c. Would a 90% confidence interval based on this sample be wider or narrower than the 95%
interval? Give a reason for your answer.

Answers

a) the Central Limit Theorem conditions are met. b) The 95% confidence interval for the proportion of adults who believe in protecting the rights of those with unpopular views is approximately 0.7934 to 0.8466.

c) . A 90% confidence interval would be wider than the 95% interval

How to Verify the Central Limit Theorem conditions.

To verify the Central Limit Theorem (CLT) conditions, we need to check the following:

1. Random Sampling: The survey states that 800 adults were randomly selected, which satisfies this condition.

2. Independence: We assume that the responses of one adult do not influence the responses of others. This condition is met if the sample is collected using a proper random sampling method.

3. Sample Size: To apply the CLT, the sample size should be sufficiently large. While there is no exact threshold, a common rule of thumb is that the sample size should be at least 30. In this case, the sample size is 800, which is more than sufficient.

Therefore, the Central Limit Theorem conditions are met.

b. To find a 95% confidence interval for the proportion of adults who believe in protecting the rights of those with unpopular views, we can use the formula for calculating a confidence interval for a proportion:

CI = p ± z * √(p(1-p)/n)

where:

- p is the sample proportion (82% or 0.82 in decimal form).

- z is the z-score corresponding to the desired confidence level. For a 95% confidence level, the z-score is approximately 1.96.

- n is the sample size (800).

Calculating the confidence interval:

CI = 0.82 ± 1.96 * √(0.82(1-0.82)/800)

CI = 0.82 ± 1.96 * √(0.82*0.18/800)

CI = 0.82 ± 1.96 * √(0.1476/800)

CI = 0.82 ± 1.96 * √0.0001845

CI ≈ 0.82 ± 1.96 * 0.01358

CI ≈ 0.82 ± 0.0266

The 95% confidence interval for the proportion of adults who believe in protecting the rights of those with unpopular views is approximately 0.7934 to 0.8466.

c. A 90% confidence interval would be wider than the 95% interval. The reason is that as we increase the confidence level, we need to account for a larger margin of error to be more certain about the interval capturing the true population proportion. As a result, the interval needs to be wider to provide a higher level of confidence.

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The equations of four lines are given. Identify which lines are parallel. Line 1: y=1/2x-6. Line 2: x-2y=-1. Line 3: y=4x+6. Line 4: y+3=1/4(x-6)

Answers

Answer:

Lines 1 and 2 are parallel because they have the same slope

Step-by-step explanation:

slope of line 1 = 1/2

slope of line 2 = 1/2

slope of line 3 = 4

slope of line 4 = 14

how to find slope of line 2, solve for 'y':

x - 2y = -1

-2y = x - 1

y = 1/2x + 2

how to find slope of line 4, simplify for 'y':

y + 3 = 1/4x - 1/4(6)

y = 1/4x - 6/4 - 3

y = 1/4x -6/4 - 12/4

y = 1/4x - 18/4

A community consists of 55% women and 45% men. suppose that, 2% of the women are color-blind and 5% of the men are color-blind. A color-blind person is chosen at random. What is the probability of this person being male? Assume that there are an equal number of males and females

Answers

The probability that a randomly chosen color-blind person is male is approximately 0.336.

Let's first calculate the proportion of color-blind people in the community:

Proportion of color-blind women = 0.55 x 0.02 = 0.011

Proportion of color-blind men = 0.45 x 0.05 = 0.0225

Total proportion of color-blind people in the community = 0.011 + 0.0225 = 0.0335

Now we want to find the probability that a randomly chosen color-blind person is male, which can be calculated using Bayes' theorem:

P(male | color-blind) = P(color-blind | male) x P(male) / P(color-blind)

We already know P(color-blind | male) = 0.0225 and P(male) = 0.5 (since we are assuming an equal number of males and females in the community). We also calculated P(color-blind) = 0.0335 above.

Substitute these values, we get:

P(male | color-blind) = 0.0225 x 0.5 / 0.0335 ≈ 0.336

Therefore, the probability is 0.336

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Simplify surd need an answer asap please

Simplify surd need an answer asap please

Answers

Simply the maths by writing what the stuff equals

Answer correctly for Brainliest. Show work.

Answer correctly for Brainliest. Show work.

Answers

Answer:

B) y=x/6 is the linear equation

Step-by-step explanation:

a) y=x^6 is a quadratic equation

c) y=6/x is a rational equation

d) y=|x+6| is a absolute value equation

Answer:

B is linear.

Step-by-step explanation:

You can plug the equations into y= or your calculator and compare the graphs

The rate constant for first-order degradation of a N2O2 in a solution (1.0 mg/ml) at 40°C
is 0.00351 hr-1, activation energy is 2000 cal/mol, and R = 1.987 cal/mol/degree.
Calculate
a. The rate constant for first-order degradation of N2O2 at room temperature (25°C).​

Answers

The 0.0035 hr⁻¹ first-order degradation rate constant in the 40 °C, 1.0 mg/ml solution, where R = 1.987 cal/mol/degree and 2,000 cal/mol activation energy indicates;

a. The rate constant for first-order degradation of N₂O₂ at room temperature is approximately 4.12595 × 10⁻² hr⁻¹

What is a first-order reaction?

A first order reaction is one that has a rate that varies linearly with the concentration of one reactant

The given parameters are;

Temperature of the solution = 40°C

T₁ = 40 °C + 273.15 = 313.15 K

The rate constant, K₁ = 0.00351 hr⁻¹

Concentration of the solution = 1.0 mg/ml

Activation energy, Eₐ = 2000 Cal/mol

R = 1.987 cal/mol/degree

The formula by which the rate constant can be found is presented as follows;

\(log\dfrac{k_2}{k_1} =\dfrac{E_a}{2.303\times R} \times \dfrac{T_2-T_1}{T_1\cdot T_2}\)

a. Room temperature = 25 °C

T₂ = 25 °C + 273.15 = 298.15 K

Therefore;

\(log\dfrac{k_2}{0.00351} =\dfrac{2000}{2.303\times 1.987} \times \dfrac{313.15-298.15}{313.15 \times 298.15}\)

\(k_2=0.00351 \times 10^{\left(\dfrac{2000}{2.303\times 1.987} \times \dfrac{313.15-298.15}{313.15 \times 298.15}\right)} \approx 4.12595\times 10^{-2}\)

The rate constant for first-order degradation of N₂O₂ at room temperature is k₂ ≈ 4.12595 × 10⁻² hr⁻¹

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Solve for all values of a on the interval [0, 2pi].2 cos²x+3 = -cos x + 4

Answers

The Solution:

Given:

\(\begin{gathered} 2cos²x+3=-cosx+4 \\ \\ interval:\text{ }[0,2] \end{gathered}\)

This becomes:

\(\begin{gathered} y=2cos^2x+3+cosx-4=0 \\ \\ y=2cos^2x+cosx-1=0 \end{gathered}\)\(Let\text{ }a=\cos x\)

So,

\(\begin{gathered} 2a^2+a-1=0 \\ \\ 2a^2+2a-a-1=0 \end{gathered}\)\(\begin{gathered} 2a(a+1)-1(a+1)=0 \\ \\ (2a-1)(a+1)=0 \\ \\ 2a-1=0\text{ or }a+1=0 \\ a=\frac{1}{2}\text{ or }a=-1 \\ \\ a=\frac{1}{2}\text{ or }a=-1 \end{gathered}\)

Substitute:

\(\begin{gathered} cosx=\frac{1}{2} \\ \\ x=\cos^{-1}(\frac{1}{2})=\frac{\pi}{3} \end{gathered}\)

Or

\(\begin{gathered} cosx=-1 \\ \\ x=\cos^{-1}(-1)=\pi \end{gathered}\)

Therefore, the correct answers are:

\(x=\frac{\pi}{3}\text{ or }x=\pi\)

PLEASEE HELP ILL MARK BRAINLIEST !!!!

PLEASEE HELP ILL MARK BRAINLIEST !!!!

Answers

The answer is (3,2) it’s on the graph

An object that weighs $1$1​ pound on Earth weighs about $\frac{1}{15}$
1
15​​ pound on Pluto. A man weighs 240$240$240​ pounds on Earth. How many pounds does he weigh on Pluto?

Please help

Answers

Answer:

look it up that ushally helps

Step-by-step explanation:

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