You buy milk that contains 180 calories per 2 cups. Use a ratio table to find the number of calories in 18 cups.

Answers

Answer 1

Answer:

1620

Step-by-step explanation:

180/2=90

90*18=1620

Answer 2

You buy milk with 180 calories in two glasses. Now compute the caloric value of 18 cups. 18 cups contain 1620 calories.

What is meant by caloric value?Calorific value, also known as heating value or heat of combustion, is a unit of measurement for the total energy content produced in the form of heat when a substance is completely combusted with air or oxygen. The amount of heat energy released during complete combustion of a unit mass of a fuel is defined as its calorific value. It is measured in kJ/kg.It is the measurement of the heat value or amount of energy released, and it is expressed in either gcv or ncv. Gross calorific value (GCV), also known as Higher Heating Value (HCV), is the amount of heat released by complete combustion when a unit of fuel is burned.

Therefore,

You buy milk with 180 calories in two glasses.

Now compute the caloric value of 18 cups.

Let 18 cups have a calorie count of As, and 2 cups have 180 calories.

A serving of two cups contains 180 calories.

As a result, the ratio would be 2: 180.

As a result, 18 cups contain X calories.

18 cups are equal to X calories.

Consequently, the ratio would be  X : 18

We now set a ratio to determine how many calories are in 18 cups:

2 : 180  ::  18  : X

Simplifying,

2/ 180 = 18/X

Cross multiplying results in:

2X = 18 × 1 80

= 3240

By multiplying both sides by 2, we obtain:

X = 3240/2

= 1620

Hence, 18 cups have 1620 calories in them.

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Related Questions

A state lotto has a prize that pays $900 each week for 20 years.
Find the total value of the prize: $

If the state can earn 5% interest on investments, how much money will they need to put into an account
now to cover the weekly prize payments?

Reminder: There are 52 weeks in a year.

Answers

The total value of the prize is $936,000.

The state will need to invest $591,498.96 now at a 5% interest rate to cover the weekly prize payments for 20 years.

What is the total value of the prize?

The total value of the prize is calculated by multiplying the annual payment by the number of years and is equal to:

=  $900/week x 52 weeks/year x 20 years

= $936,000.

How much money is needed to put into the account?

We need to use the present value formula which is: PV = PMT x [1 - (1 + r)^-n] / r

Plugging in the values:

PV = $900 x [1 - (1 + 0.00096154)^-1,040] / 0.00096154

PV = $900 x 657.221075423

PV = $591,498.968.

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The correlation between the heights (feet) of fathers (x) and the heights (feet) of their adult sons (y) is r = 0.89. If the sons’ heights were instead measured in inches, the correlation between heights of fathers and heights of sons would be

a
much smaller than 0.89
b
slightly larger than 0.89
c
slightly smaller than 0.89
d
unchanged; equal to 0.89

Answers

If the unit is changed from feet to inches, the correlation coefficient remains unchanged; equal to 0.89. Option D

What is the correlation coefficient?

We know that the correlation coefficient is the figure that shows the level of association between two variables. If the correlation coefficient is large and positive it means that there is a large degree of association between the variables.

On the other hand, if the value of the correlation coefficient is small then we know that there is only a little association between the variakes. The correlation coefficient would not change even if the units of the measurements change.

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Please help!! I don't understand this!?!?!?

Answers

Answer:

Understgand what?

Step-by-step explanation:

Answer:

whats your question?

Step-by-step explanation:

Harry makes 2 litres of his delicious bat wing soup.
He wants to store the soup in 250ml containers.
How many containers will he need?

Answers

Answer:

250

Step-by-step explanation:

The answer is 8 containers
2 liters = 2000ml so you’d divide 2000/250 and you’d get 8.

What is the meaning of "all free variables of a formula ϕ(u1, . . . , un) are among u1, . . . , un"?

What is the meaning of "all free variables of a formula (u1, . . . , un) are among u1, . . . , un"?

Answers

The phrase "all free variables of a formula ϕ(u1, . . . , un) are among u1, . . . , un" refers to a property of a logical formula ϕ with variables u1, u2, ..., un. In logic and formal systems, variables are used to represent unspecified elements or objects.

What does the phrase imply?

When a variable is considered "free" in a formula, it means that it is not bound by any quantifiers or other logical operators in the formula. In other words, it is a variable that is not restricted in any way within the formula.

The given statement implies that all the free variables in the formula ϕ(u1, . . . , un) are explicitly listed among the variables u1, u2, ..., un. In other words, the formula ϕ does not contain any additional free variables beyond the ones explicitly mentioned.

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An adult dinner cost 8 a family of 2 adults and children pay 24 for the their dinners

Answers

Answer:

The total cost will be 2 adult ($16), and 4 children ($8)

Which insect measurement was the most frequent?
Length of insects (in inches)

Which insect measurement was the most frequent?Length of insects (in inches)

Answers

The insect measurement that was the most frequent is given as follows:

1 and 1/4 inches.

How to obtain the most frequent insect measurement?

A dot plot is a simple graphical display that uses dots to represent data values. It is also sometimes called a dot chart or a scatterplot. In a dot plot, each data point is represented by a dot along a number line or axis, where the position of the dot corresponds to the value of the data point.

Hence, a dot plot shows the number of times that each observation appeared in the data-set.

The observation with the most dots is the observation 2/8 of the way between 1 and 2, hence the most frequent observation is given by the following mixed number:

1 and 2/8 = 1 and 1/4 inches.

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Consider the functions f(x) = 223 + 922 + 3x + 12 and g(x) = 323 + 10x2 + × + 8.
The graph of their difference, f(x) - g(x), is shown on the coordinate grid.
What is/are the solution(s) to the equation f(x) - g(x) = 4?
List the solutions from least to greatest separated by a coma(s).

Consider the functions f(x) = 223 + 922 + 3x + 12 and g(x) = 323 + 10x2 + + 8.The graph of their difference,

Answers

The solutions for the given equation is x=0, x=-4 and x=3.

The given functions are f(x)=2x³+9x²+13x+12 and g(x)=3x³+10x²+x+8.

What is the function?

Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.

Now, f(x)-g(x)

= 2x³+9x²+13x+12-(3x³+10x²+x+8)

= 2x³+9x²+13x+12-3x³-10x²-x-8

= -x³-x²+12x+4

Graph the cubic using its end behavior and a few selected points.

Rises to the left and falls to the right

Plot (-2, -16), (-1, -8), (0, 4), (1, 14) and (2, 16)

Given f(x)-g(x)=4

-x³-x²+12x+4=4

⇒ -x³-x²+12x=0

⇒ -x(x²+x-12)=0

⇒ x=0 and x²+x-12=0

⇒ x=0 and x²+4x-3x-12=0

⇒ (x+4)(x-3)=0

⇒ x=0, x=-4 and x=3

Therefore, the solutions for the given equation is x=0, x=-4 and x=3.

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Consider the functions f(x) = 223 + 922 + 3x + 12 and g(x) = 323 + 10x2 + + 8.The graph of their difference,

Find the quotient of z₁ by z2. Express your answer in
trigonometric
form.
² - 3 (0 (4) + (*))
Z₁ cos
+/sin
Z₂
²2 = 7 (cos(377)+
COS
8
O A. 7 (cos (577) + i sin (5/77))
8
B.
21(cos(577)+isin (577))
8
OC. 21 cos
21(cos(-7)+ i sin(-77))
O D. 7 (cos(-7) + + sin(-7))
i
+/sin
37T
8

Find the quotient of z by z2. Express your answer intrigonometricform. - 3 (0 (4) + (*))Z cos+/sinZ2

Answers

The quotient of z₁ by z₂ in trigonometric form is:

7/21 * (cos(584°) + i sin(584°))

To find the quotient of z₁ by z₂ in trigonometric form, we'll express both complex numbers in trigonometric form and then divide them.

Let's represent z₁ in trigonometric form as z₁ = r₁(cosθ₁ + isinθ₁), where r₁ is the magnitude of z₁ and θ₁ is the argument of z₁.

We have:

z₁ = 7(cos(577°) + i sin(577°))

Now, let's represent z₂ in trigonometric form as z₂ = r₂(cosθ₂ + isinθ₂), where r₂ is the magnitude of z₂ and θ₂ is the argument of z₂.

From the given information, we have:

z₂ = 21(cos(-7°) + i sin(-77°))

To find the quotient, we divide z₁ by z₂:

z₁ / z₂ = (r₁/r₂) * [cos(θ₁ - θ₂) + i sin(θ₁ - θ₂)]

Substituting the given values, we have:

z₁ / z₂ = (7/21) * [cos(577° - (-7°)) + i sin(577° - (-7°))]

= (7/21) * [cos(584°) + i sin(584°)]

The quotient of z₁ by z₂ in trigonometric form is:

7/21 * (cos(584°) + i sin(584°))

Option C, 21(cos(-7°) + i sin(-77°)), is not the correct answer as it does not represent the quotient of z₁ by z₂.

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Calculate the average rate of change for the given graph from x = 0 to x = 3 and select the correct answer below. (0,6) (3,0) ​

Answers

Answer:

(3,0)

Step-by-step explanation:

The number on the x axis is the only number that changes not the number on the y axis.  

Answer:

-2

Step-by-step explanation:

(6,0)-(0,3)

It goes don -6 and over 3

-6/3=-2

Simplify the expression -3÷(-2/5). A. -7 1/2 B. -1 1/5 C. 1 1/5 D. 71/2​

Answers

Answer: The answer is D: 7 1/2.

Step-by-step explanation:

When h=4 , j=5 , and k=−1 , the expression jkh+hj−jk equals?

Answers

When h = 4, j = 5, and k = -1, the expression jkh + hj - jk equals 5.

To solve the expression we have to substitute the value of each variable in the expression. Then simplify the expression according to mathematic rule. After solving we get the solution of the expression.

An expression is a combination of numbers, variables, and/or operations that can be evaluated or simplified to obtain a numerical or algebraic result.

The given expression is:

jkh + hj - jk

Substituting the given values of h, j, and k, we get:

jkh + hj - jk = (5 x (-1) x 4) + (5 x 4) - (5 x (-1))

Now simplify the expression

jkh + hj - jk = (-20) + 20 + 5

jkh + hj - jk = 5

Therefore, the value of  jkh + hj - jk equals 5.

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Neema bought appliances costing $3725 at a store charging 5% add-on interest. She made a $700 down payment and agreed to monthly payments over four years. Find the total cost, for the appliances plus
interest.
The total cost for the appliances plus interest is $
(Type an integer or decimal.)

Answers

The total cost for the appliances plus interest is 4330.

What is an interest rate?

The amount a lender charges a borrower is called an interest rate, and it is expressed as a percentage of the principal or the loaned amount. Typically, a loan's interest rate is expressed as an annual percentage rate, or APR.

Here, we

Cost of the appliance = $3725

Neema paid $700 so amount financed = $3725 - $700 = $3025

Interest rate on the loan = 3025*0.05*4 = $605

Total cost of the appliance = $3725 + 605 = $4330

Hence, the total cost for the appliances plus interest is 4330.

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Which ratio is equivalent to 3:7 is it 6:7, 3:21, 24:56, or 15:30​

Answers

24:56 is the correct answer. if you divide both those numbers by 8 ( 24:56 ), you get 3:7

Answer:

24:56 is equivalent to 3:7

Step-by-step explanation:

All you have to do is divide 24:56 by 8.

1. 24 ÷ 8 = 3

2. 56 ÷ 8 = 7

And there you go = 3:7

Complete the sentences to make true statements

6 is 100 times ____.
0.06 is 10 times ____.
60 is 1/100 of ____.

Answers

Answer:

6 is 100 times 0.06  

0.06 is 10 times 0.006  

60 is 1/100 of 6,000

Step-by-step explanation:

Since 6/100 is equal to 0.06, we can say that 6 is the result of multiplying 0.06 by one hundred (0.06 x 100 = 6).  

On the other hand, since 0.06 / 10 is equal to 0.006, it is correct to say that 0.006 x 10 is equal to 0.06 (0.006 x 10 = 0.06).  

Finally, 60 is one hundredth of 6000, since multiplying 60 x 100 the result is 6,000 (6,000 / 100 = 60).

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The complete sentences are:

6 is 100 times 0.06 .

0.06 is 10 times 0.006.

60 is 1/100 of 6,000.

"6 is 100 times greater than 0.06":

This means that if you multiply 0.06 by 100, you get 6.

So, 6 is indeed 100 times larger than 0.06.

"0.06 is 10 times greater than 0.006":

In this case, if you multiply 0.006 by 10, you get 0.06.

Thus, 0.06 is 10 times larger than 0.006.

"60 is 1/100 of 6,000":

This means that if you divide 6,000 by 100, you get 60.

So, 60 is a hundredth (1/100) of 6,000.

Hence, 6 is 100 times 0.06  

0.06 is 10 times 0.006  

60 is 1/100 of 6,000

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Circle the fraction that makes each comparison true. Show your work by making equivalent fractions with common denominator. 3/4>5/6

Answers

Step-by-step explanation:

18/24>20/24 you have to flip the sign to make it correct

a third grader has a goal of solving 100 math facts in 5 minutes (or 300 seconds). how many seconds can he spend on each math fact? give unit rate in seconds per fact.

Answers

Answer:

1 fact per 3 seconds because you divide 300 by 100

Answer:

3 seconds/per fact

Step-by-step explanation:

300 divided by 100

= 3

What is 0.4275 rounded to the nearest thousandths

Answers

Nearest thousands means that we want 3 decimal places. To approximate a number to it we see the next decimal place. If it is greater than 5, we round up, if it is less than 5, we round it down.

If it is exactly 5, we round it so that the last digit is even.

In this case, we have 0.4275. We want 3 decimal places and the fouth is exactly 5, so we need to use the third rule. Since the third digit is 7, if we round down, we will still be at 7, which is odd, so we need to round up, so we becomes 8, and even digit.

So, the approximation is 0.428.

A tank in the shape of a hemisphere has a diameter of 24 feet. If the liquid that fills the tank has a density of 92.5 pounds per cubic foot, what is the total weight of the liquid in the tank, to the nearest full pound?

Answers

The total weight of the liquid in the tank is approximately 12,628 pounds.

To calculate the weight of the liquid, we need to determine the volume of the hemisphere and then multiply it by the density of the liquid. The formula for the volume of a hemisphere is V = (2/3)πr³, where r is the radius of the hemisphere.

In this case, the diameter of the tank is given as 24 feet, so the radius is half of that, which is 12 feet. Plugging this value into the formula, we get V = (2/3)π(12)³ ≈ 904.78 cubic feet.

Finally, we multiply the volume by the density of the liquid: 904.78 cubic feet * 92.5 pounds per cubic foot ≈ 12,628 pounds. Therefore, the total weight of the liquid in the tank is approximately 12,628 pounds.

In summary, to calculate the weight of the liquid in the tank, we first determine the volume of the hemisphere using the formula V = (2/3)πr³. Then, we multiply the volume by the density of the liquid.

By substituting the given diameter of 24 feet and using the appropriate conversions, we find that the total weight of the liquid is approximately 12,628 pounds.

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4)PQRS is a rectangle. The length of the diagonal PR is 10cm. If PQ = 8cm, find the perimeter of the
rectangle.

Answers

The perimeter of the rectangle PQRS would be 28 cm which is the addition of all lengths of sides.

The given rectangle PQRS that has a length of the diagonal PR is 10 cm and PQ = 8 cm

What is the perimeter of the rectangle?

The perimeter of a rectangle is defined as the addition of the lengths of the rectangle's four sides.

To determine the perimeter of the rectangle.

Since opposite sides of the rectangle and diagonal are equal.

⇒ PQ = SR = 8 cm

⇒ PR = QS = 10 cm

⇒ PS = QR = x cm (suppose)

In the rectangle, all the angles are right angles

Now in △QRS,

Using Pythagoras' theorem, we have

QS² = QR² + SR²

10² = x² + 8²

x² = 100 - 64

x =√36

x = 6 cm

So length of PS = QR = 6 cm

The perimeter of the rectangle = PQ + SR + PS + QR

The perimeter of the rectangle = 8 + 8 + 6 + 6 = 28 cm

Therefore, the perimeter of the rectangle PQRS would be 28 cm.

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factor by grouping\((4y^3 + 28y^2) + (y + 7)\)

Answers

We have the following expression given:

\((4y^3+28y^2)+(y+7)\)

We can start selecting as common factor 4y^2 and we got:

\(4y^2(y+7)+(y+7)\)

Now we can select y+7 as common factor and we got:

\((y+7)\left\lbrack 4y^2+1\right\rbrack \)

So then our final answer would be:

\((y+7)(4y^2+1)\)

The graph of f is translated a whole number of units horizontally and vertically to obtain the graph of h
The function f is defined by f(x) = square root of x
Write down the expression for h(x).

Answers

The expression for h(x) is,

⇒  h (x) = √(x - 2) + 4

Now, Given that;

Initially the graph f (x) is shifted horizontally to the right.

When the graph shifts to right the function then becomes

f (x) → f (x-b)

Where b is the units by which it is shifted towards right .

So, in the figure we can see that it is shifted 2 units to the right .

So, f(x) → f(x-2)

Since f(x) is,

⇒ f (x) = √x

So, f (x-2) = √x - 2

Now, the new obtained graph is again shifted vertically upward

When the graphs shifts upward;

⇒ f(x) → f(x) + b

where b is the units by which it is shifted upward

So, our obtained f(x-2) when shifted upward by 4 units so using the above given transformation of upward shift

i.e. f(x) → f(x) + b

So, Our new graph h(x) = f(x-2) + 4

⇒  h (x) = √(x - 2) + 4

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The graph of f is translated a whole number of units horizontally and vertically to obtain the graph

Simplify the expression. What classification describes the resulting polynomial?

(8x2 + 3x) − (12x2 − 1)

Answers

The simplified expression is \(-4x^2 + 3x + 1\), which is a quadratic polynomial. Option D.

To simplify the expression \((8x^2 + 3x) - (12x^2 - 1)\), we can distribute the negative sign to each term within the parentheses:

\(8x^2 + 3x - 12x^2 + 1\)

Next, we can combine like terms by adding or subtracting coefficients of similar powers of x:

\((8x^2 - 12x^2) + 3x + 1\)

Simplifying further, we have:

\(-4x^2 + 3x + 1\)

The resulting polynomial \(-4x^2 + 3x + 1\) is a quadratic polynomial since it has a highest power of x^2 (the exponent of x is 2), which is\(-4x^2.\)Quadratic polynomials are polynomials of degree 2 and can be represented by a parabola when graphed.

In summary, the simplified expression \((8x^2 + 3x) - (12x^2 - 1)\) simplifies to \(-4x^2 + 3x + 1\) , which is a quadratic polynomial. So Option D is correct

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Note the complete question is

Simplify the expression. What classification describes the resulting polynomial?(8x2 + 3x) (12x2 1)

A 9-foot roll of waxed paper costs $3.69. What is the price per yard?

Answers

Answer:

11.07

Step-by-step explanation:

a yard is three times a foot so 3×3.69 is the answer

I didn't read it right, ignore me

Point Q lies on the circle and has an X-coordinate of 4. Which value could be the y-coordinate for point Q? ​

Answers

We are not given the radius of the circle or any other relevant data, so I assumed the radius of the circle r=5

Answer:

The y-coordinate of Q is 3

Step-by-step explanation:

Circles and Lines

The figure below shows a circle of radius r=5 and a segment that goes from the center of the circle to a point of the circumference, where x=4.

We can find the y-coordinate of that point by using Pithagora's theorem:

\(r^2=x^2+y^2\)

Solving for y:

\(y^2=r^2-x^2\)

\(y^2=5^2-4^2\)

\(y^2=25-16=9\)

\(y=\sqrt{9}=3\)

The y-coordinate of Q is 3

Point Q lies on the circle and has an X-coordinate of 4. Which value could be the y-coordinate for point

Alijah had a taxable income of $8450 and filed his federal income tax return with the Single filing status. Using the table below, find the amount he has to pay in taxes.
Single
Taxable income is over
8.350
33 950
82.750
171.550
372,950
But nat over
8,350
33.950
82,250
171.550
372.550
The tax is
Plus
50.00
835.00
4 675.00
16.750.00
41,754.00
108,216.00
10%
15%
25%
20%
33%
35%
Of the
amount over
50
8.350
33.950
82,250
171.550
372,850
O A. $835.00
• B. $850.00
O c. $2087.50
O D. $1252.50

Answers

Answer:

Step-by-step explanation:

67

Alijah's taxable income puts him in the first tax bracket, over $8,350 but not surpassing $33,950. Hence, his tax due is a base of $835 plus 15% of the income that exceeds $8,350. This results in a total tax payable of $850. Option B is the correct answer.

Alijah's taxable income falls within the first bracket of the tax table given, being over $8,350 but not over $33,950.

This bracket requires him to pay a tax of $835.00 plus 15% of the amount over $8,350.

He has a surplus of $100 over the $8,350 threshold (i.e., $8,450 - $8,350), and 15% of $100 equals $15.

Therefore, the total tax he owes would be the fixed amount of $835.00 plus the $15.00 calculated, which sums up to $850.00.

Thus, looking at the provided options, option B ($850.00) would be the correct answer.

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bella answered 33 questions on her math test. she earned a 92% on the test. how many questions did she answer correct

Answers

Answer: 30.36

Step-by-step explanation:

92% of 33 is 30.36. I don't know how Bella got 30.36 questions correct, but that is what I got.

50 POINTS
Ron has a homeowner’s insurance policy, which covers theft, with a deductible of d dollars. Two bicycles, worth b dollars each, and some tools, worth t dollars, were stolen from his garage. If the value of the stolen items was greater than the deductible, represent the amount of money the insurance company will pay algebraically.

Answers

Algebraically, the amount of money the insurance company will pay, represented as P, is equal to the total value of the stolen items (2b + t) minus the deductible (d).

Let's denote the amount of money the insurance company will pay as P. In this scenario, if the value of the stolen items is greater than the deductible, the insurance company will cover the loss, and Ron will receive compensation for the stolen items.

The total value of the stolen items can be calculated by adding the value of the bicycles (2b) and the value of the tools (t). So, the total value of the stolen items is 2b + t.

If the total value of the stolen items is greater than the deductible (d), then the insurance company will pay the difference between the total value and the deductible. Mathematically, this can be represented as:

P = (2b + t) - d

Therefore, algebraically, the amount of money the insurance company will pay, represented as P, is equal to the total value of the stolen items (2b + t) minus the deductible (d).

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Two people are playing the game rock, paper scissors. In each round both players show rock, paper, or scissors at the same time. What is the probability that both players show rock in the first round. Show your work.

Answers

The probability that both players show rock in the first round is 1/9 or 0.1111 (rounded to four decimal places).

In rock, paper, scissors there are three possible outcomes for each player: rock, paper, or scissors. Assuming both players choose randomly and independently of each other, each player has a 1/3 chance of showing rock in the first round.

To find the probability that both players show rock in the first round, we can use the multiplication rule of probability for independent events. The multiplication rule states that the probability of the intersection of two independent events is the product of their probabilities.

Therefore, the probability that both players show rock in the first round can be calculated as follows:

P(both show rock) = P(player 1 shows rock) x P(player 2 shows rock) P(both show rock) = 1/3 x 1/3 P(both show rock) = 1/9

So the probability that both players show rock in the first round is 1/9 or approximately 0.111.

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Find the exact value of sin G.A. √1010B. 3√1010C. 4√10D. 160

Find the exact value of sin G.A. 1010B. 31010C. 410D. 160

Answers

Given the Right Triangle EFG, you know that:

\(\begin{gathered} EF=4 \\ EG=12 \end{gathered}\)

By definition:

\(sin\theta=\frac{opposite}{hypotenuse}\)

Since, in this case:

\(\theta=G\)

You can identify that:

\(\begin{gathered} opposite=EF=4 \\ hypotenuse=FG \end{gathered}\)

In order to find the hypotenuse of the Right Triangle, you need to use the Pythagorean Theorem, which states that:

\(c=\sqrt{a^2+b^2}\)

Where "c" is the hypotenuse, and "a" and "b" are the legs of the Right Triangle.

You can set up that:

\(\begin{gathered} c=FG \\ a=EG=12 \\ b=EF=4 \end{gathered}\)

Therefore:

\(FG=\sqrt{12^2+4^2}=4\sqrt{10}\)

Now you can determine that:

\(sinG=\frac{4}{4\sqrt{10}}\)

Simplify:

\(sinG=\frac{1}{\sqrt{10}}\)

You can multiply the numerator and the denominator by:

\(\sqrt{10}\)

In order to Rationalize the denominator:

\(sinG=\frac{1\cdot\sqrt{10}}{\sqrt{10}\cdot\sqrt{10}}\)\(sinG=\frac{1\cdot\sqrt{10}}{(\sqrt{10})^2}\)\(sinG=\frac{\sqrt{10}}{10}\)

Hence, the answer is: Option A.

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