What time would it be if the minute hand rotated 90° counterclockwise from the current time

Answer:

Watershed is a drainage basin in a particular area where precipitation collects or stores and drains off in a river or bay etc.

hope it helps!

Answer: A watershed describes an area of land that contains a common set of streams and rivers that all drain into a single larger body of water, such as a larger river, a lake or an ocean.  the Mississippi River watershed is an enormous watershed.  Small watersheds are usually part of larger watersheds.

Answer:

2x+8=180° (being vertically opposite angles)

Step-by-step explanation:

2x+8=110°

or, 2x= 110-8

or, x=102°÷2

: x= 51 answer

Answer:

145.62

Step-by-step explanation:

sin 18° = 45/z

z sin 18° = 45

z = 45/sin 18°

z = 145.62

In this case the answer is very simple . .

We must apply the distributive property of multiplication.

That is the solution. .

When testing the differences between means, the research hypothesis suggests that population means are not equal.  (Option B)

Hypothesis refers to a concept or explanation for a trend that is based on known facts but has not yet been proved. A research hypothesis, also known as scientific hypothesis, is a statement about the expected result of a study. It is the proposed answer to the research question and generally includes an explanation (e.g., x affect y because …). It introduces a research question and proposes an expected result. It illustrates the relationship between two variables - an independent and dependent variable. Hence, when testing the difference between means, the hypothesis that suggests that population means are not equal is a research hypothesis.

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The domain of the function is 1 ≤ x < 2.

The domain of a function is the set of all possible inputs for the function. For example, the domain of f(x)=x² is all real numbers, and the domain of g(x)=1/x is all real numbers except for x=0.

The domain is the set of all first elements of ordered pairs (x-coordinates). The range is the set of all second elements of ordered pairs (y-coordinates).

We have f : \(\frac{1}{\sqrt{x-1} } + \frac{1}{\sqrt{2-x} }\)

\(\sqrt{x-1}\) ≥ 0

x- 1 ≥ 0

x ≥ 1

Similarly , \(\sqrt{2-x}\) > 0

2 - x > 0

2 > x

So our domain is 1 ≤ x < 2.

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The number of  boys and girls in a class of 150 students is 90 and 60 respectively.

RATIO:

Comparing two quantities of the same units and determining the ratio tells us how much of one quantity is in the other.

i.e., it shows how many times a number contains another.

Total number of students = 150

ratio of boys to girls = 3 : 2

B:G = 3 : 2

now

3x + 2x = 150

5x = 150

x = 30

the number of boys = 3x = 3 X 30 = 90 boys.

the number of girls = 2x = 2 X 30 = 60 girls.

The number of  boys and girls in a class of 150 students is 90 and 60 respectively.

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Answer:

144 minutes or 2 hours and 24 minutes

Step-by-step explanation:

12 miles divided by 2 miles = 6

24 * 6 - 144

So the final answer is 144.

Answer: 144 minutes

Step-by-step explanation:

If she can run 2 miles in 24 minutes and she needs to run 12 miles you need to multiple 24 and 6 ( You get a six because 24 minutes is for TWO miles. So you need to split the 12 in half.)

Step-by-step explanation:

3.65<x<3.75

plsss mark brainliestt

Angles Formulas at the center of a circle can be expressed as:

Central angle, θ = (Arc length × 360º)/(2πr) degrees

Sum of Interior angles=180°(n-2)

The angles formulas are used to find the measures of the angles. An angle is formed by two intersecting rays, called the arms of the angle, sharing a common endpoint.

The corner point of the angle is known as the vertex of the angle. The angle is defined as the measure of the turn between the two lines.

There are various types of formulas for finding an angle; some of them are the central angle formula, double-angle formula, etc...

We use the central angle formula to determine the angle of a segment made in a circle.

We use the sum of the interior angles formula to determine the missing angle in a polygon.

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Answer:

y = -15

Step-by-step explanation:

All you have to do is 51 divided by -3.4 and it equals -15. Inverse operations in short terms. And if you substitute -15 for y it will fir.

Answer:

-3.4y = 51

y = 51/-3.4

y = 510/-34

y = -15

The curve with the equation y = 2x² / (x - 1) has the x-intercepts at (-1, 0) and (1, 0), and the y-intercept at (0, 0). Therefore the correct answer is c. (-1, 0) and (1, 0).

In the given equation,

y = 2x² / (x - 1),

The x-intercepts occur when y is equal to zero. Setting y to zero,

we get 2x² / (x - 1) = 0.

For the fraction to be equal to zero, the numerator must be equal to zero, so 2x² = 0.

This implies that x = 0. However, x = 0 does not satisfy the denominator (x - 1 ≠ 0), so it is not an x-intercept .

To find the x-intercepts , we need to solve the equation (x - 1) = 0. This gives us x = 1. Substituting x = 1 into the equation,

we get y = 2(1)² / (1 - 1) = 2(1)² / 0.

Division by zero is undefined, which means the fraction is undefined at x = 1.

Therefore, (1, 0) is an x-intercept.

For the y-intercept , we set x to zero in the equation

y = 2x² / (x - 1).

y = 2(0)² / (0 - 1)

y = 0 / -1

y = 0.

Thus, the y-intercept is y = 0.

The curve with the equation y = 2x² / (x - 1) has the x-intercepts at (-1, 0) and (1, 0), and the y-intercept at (0, 0).  Therefore the correct answer is C. (-1, 0) and (1, 0).

Complete question:-

A curve has equation y = 2x² / x-1. What are the x and y intercepts?

a. (0, 1) and (1,0)

b. None of these options

c. (-1,0) and (1,0)

d. (0, 2) and (2,0)

e. (0,0)

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The future value of the fund on January 1, 2018, just after the third deposit, is approximately $47,986.47.

To find the future value of the fund on January 1, 2018, just after the third deposit, we can use the compound interest formula:

\(FV = P(1 + r/n)^{nt}\)

Where:

FV = Future Value

P = Principal amount (initial investment)

r = Annual interest rate (expressed as a decimal)

n = Number of times the interest is compounded per year

t = Number of years

Let's calculate the future value step by step:

First deposit:

P = $16000

r = 7.2% = 0.072 (as a decimal)

n = 12 (compounded monthly)

t = 4.333 years (from September 1, 2010, to March 1, 2015)

\(FV_1 = 16000(1 + 0.072/12)^{(12*4.333)}\\= 16000(1 + 0.006)^{52}\\= 16000(1.006)^{52}\\= 20,296.43\)

Second deposit:

P = $13000

r = 7.2% = 0.072 (as a decimal)

n = 12 (compounded monthly)

t = 2.917 years (from March 1, 2015, to January 1, 2018)

\(FV_2 = 13000(1 + 0.072/12)^{(12*2.917)}\\= 13000(1 + 0.006)^{35}\\= 15,618.04\)

Third deposit:

P = $12000

r = 7.2% = 0.072 (as a decimal)

n = 12 (compounded monthly)

t = 0.084 years (from January 1, 2018, to January 1, 2018)

\(FV3 = 12000(1 + 0.072/12)^{(12*0.084)}\\= 12000(1 + 0.006)\\= $12,072.00\\\)

Adding up the future values:

\(Total FV = FV_1 + FV_2 + FV_3\)

= $20,296.43 + $15,618.04 + $12,072.00

≈ $47,986.47

Therefore, the future value of the fund on January 1, 2018, just after the third deposit, is approximately $47,986.47.

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Answer:

21 meters

Step-by-step explanation:

you can see it goes 21 meters before it hits the ground

Answer:

21 is the answer

The integral of (42³ - 2r + 7) dz is equal to (42³ - 2r + 7)z + C.

To integrate the function (42³ - 2r + 7) dz, we treat r as a constant and integrate with respect to z. The integral of a constant with respect to z is simply the constant multiplied by z:

∫ (42³ - 2r + 7) dz = (42³ - 2r + 7)z + C

where C is the constant of integration.

Note: The integral of a constant term (such as 7) with respect to any variable is simply the constant multiplied by the variable. In this case, the variable is z.

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The probability of the interval -1.62 < z < 2.01 in a standard normal distribution is approximately 0.9262 or 92.62%.

In a standard normal distribution, the mean is 0 and the standard deviation is 1. The z-score represents the number of standard deviations a data point is from the mean. To find the probability of a specific interval, we calculate the area under the curve between the corresponding z-values.

Given the interval -1.62 < z < 2.01, we need to find the area under the standard normal curve between these two z-values. This can be done using a standard normal distribution table or by using a statistical software or calculator.

By looking up the z-values in the table or using software, we find the corresponding probabilities: P(z < -1.62) = 0.0526 and P(z < 2.01) = 0.9788.

To find the probability of the interval -1.62 < z < 2.01, we subtract the probability of the lower bound from the probability of the upper bound: P(-1.62 < z < 2.01) = P(z < 2.01) - P(z < -1.62 = 0.9788 - 0.0526 = 0.9262.

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The race car driver must maintain a minimum average speed of 330 km/h for the remaining 2 laps to qualify for the race.

To find the minimum average speed needed for the remaining 2 laps, we need to determine the total distance covered in the first 3 laps and the remaining distance to be covered in the next 2 laps.

Given:

Average speed for the first 3 laps = 220 km/h

Total number of laps = 5

Target average speed for 5 laps = 270 km/h

Let's calculate the distance covered in the first 3 laps:

Distance = Average speed × Time

Distance = 220 km/h × 3 h = 660 km

Now, we can calculate the remaining distance to be covered:

Total distance for 5 laps = Target average speed × Time

Total distance for 5 laps = 270 km/h × 5 h = 1350 km

Remaining distance = Total distance for 5 laps - Distance covered in the first 3 laps

Remaining distance = 1350 km - 660 km = 690 km

To find the minimum average speed for the remaining 2 laps, we divide the remaining distance by the time:

Minimum average speed = Remaining distance / Time

Minimum average speed = 690 km / 2 h = 345 km/h

The race car driver must maintain a minimum average speed of 330 km/h for the remaining 2 laps to qualify for the race.

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The opening area for a 7 inch diameter channel is approximately 38.484 square inches.

The area of ​​a circular opening can be found using the circle area formula given by \(A = \pi r^2\). where A is the area and r is the radius of the circle. In this case, the duct diameter is 7 inches. The radius can be calculated by dividing the diameter by 2, so the radius is 7/2 = 3.5 inches.

Substituting the radius into the equation gives A = π(3,5)^2. Evaluating this formula gives A = \(\pi\)(12.25) ≈ 38.484 square inches. Rounding the result to the nearest thousandth, the area of ​​the channel opening is approximately 38.484 square inches.

Therefore, a 7 inch diameter duct has an orifice area of ​​approximately 38.484 square inches. 

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The area of the rhombus is 120 ft squared.

A rhombus is a quadrilateral with all sides equal to each other. The opposite side of a rhombus is parallel to each other.

Therefore, the area of the rhombus can be found as follows:

area of rhombus = ab / 2

where

Therefore,

a = 12 × 2 = 24 ft

b = 5 × 2 = 10 ft

Hence,

area of rhombus = 24 × 10 / 2

area of rhombus = 240 / 2

area of rhombus = 120 ft²

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Answer:

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also h*t and s**y ..

Answer:

plz mark me as a brainelist

hope it helps you

Roland made 16 sales this week, while Vickie made 8 more sales than Roland.

An equation is an expression that shows the relationship between two or more numbers and variables. Equations can either be linear, quadratic, cubic and so on depending on the degree.

Let x represent the number of sales Roland has.

Roland earns a base of $49 plus $15 per sale. HenceL

Total earning by Roland = 15x + 49

Vickie made 8 more sales than Roland. Vickie earns a base of $145 plus $6 per sale.

Total earning by Vickie = 6(x + 8) + 145 = 6x + 193

Roland and Vickie are salespeople who earned the same amount this week, Therefore:

15x + 49 = 6x + 193

9x = 144

x = 16

Roland made 16 sales this week.

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The probabilities are 0.88, 0.16, 0.63, 0.25.

a) The probability that a randomly selected U.S. adult has a landline or a cell phone can be found by adding the probabilities of each event individually and subtracting the probability of having both. So, P(L or C) = P(L) + P(C) - P(L and C) = 0.25 + 0.84 - 0.21 = 0.88.

b) The probability that a randomly selected U.S. adult does not have a cell phone can be found by subtracting the probability of having a cell phone from 1. So, P(not C) = 1 - P(C) = 1 - 0.84 = 0.16.

c) The probability that a randomly selected U.S. adult has a cell phone but not a landline can be found by subtracting the probability of having both from the probability of having a cell phone. So, P(C and not L) = P(C) - P(L and C) = 0.84 - 0.21 = 0.63.

d) If a U.S. adult has a cell phone, the probability that they also have a landline can be found by dividing the probability of having both by the probability of having a cell phone. So, P(L | C) = P(L and C) / P(C) = 0.21 / 0.84 = 0.25.

e) To determine if having a landline and a cell phone are independent events, we compare the probability of having both (P(L and C)) with the product of the probabilities of each event occurring separately (P(L) * P(C)). If P(L and C) = P(L) * P(C), then the events are independent. In this case, 0.21 ≠ (0.25)(0.84), so having a landline and a cell phone are not independent events.

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Answer:

TWO SOLUTIONS EXIST FOR THESE EQUATIONS

Answer:

21x - 9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Distributive Property

Algebra I

Step-by-step explanation:

Step 1: Define

18x - (-3x + 9)

Step 2: Simplify

To estimate the difference between proportions, sample around 3355 stalks from each section of the field.

In order to estimate the true difference between proportions of stalks damaged in the two sections of the sugarcane field, we need to determine the sample size required to achieve a desired level of precision and confidence.

To estimate the required sample size, we can use the formula for sample size determination for estimating the difference between two proportions. This formula is based on the assumption of a normal distribution and requires the proportions from each section.

Let's denote the proportion of stalks damaged in the middle section as p1 and the proportion of stalks damaged in the outer perimeter as p2. We want to estimate the difference between these proportions to within 0.02 (±0.02) with 90% confidence.

To calculate the required sample size, we need to make an assumption about the value of p1 and p2. If we don't have any prior knowledge or estimate, we can use a conservative estimate of p1 = p2 = 0.5, which maximizes the required sample size.

Using this conservative estimate, we can apply the formula for sample size determination:

n = (Z * sqrt(p1 * (1 - p1) +\(p2 * (1 - p2)))^2 / d^2\)

where:

Plugging in the values, we get:

n = (1.645 * sqrt(0.5 * (1 - 0.5) + 0.5 *\((1 - 0.5)))^2 / 0.02^2\)

n = (1.645 * sqrt\((0.25 + 0.25))^2\)/ 0.0004

n = (1.645 * sqrt\((0.5))^2\) / 0.0004

n =\((1.645 * 0.707)^2\) / 0.0004

n =\(1.158^2\) / 0.0004

n = 1.342 / 0.0004

n ≈ 3355

Therefore, the required sample size from each section of the field would be approximately 3355 stalks, in order to estimate the true difference between proportions of stalks damaged in the two sections to within 0.02 with 90% confidence.

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To estimate the true difference between proportions of stalks damaged in the two sections of the sugarcane field, approximately 665 stalks from each section should be sampled.

In order to estimate the true difference between proportions of stalks damaged in the middle and outer perimeter sections of the sugarcane field, a representative sample needs to be taken from each section. The goal is to estimate this difference within a certain level of precision and confidence.

To determine the sample size needed, we consider the desired precision and confidence level. The requirement is to estimate the true difference between proportions of stalks damaged within 0.02 (i.e., within 2%) with 90% confidence.

To calculate the sample size, we use the formula for estimating the sample size needed for comparing proportions in two independent groups. Since an equal number of stalks will be sampled from each section, the total sample size required will be twice the sample size needed for a single section.

The formula to estimate the sample size is given by:

n = [(Z * sqrt(p * (1 - p)) / d)^2] * 2

Where:

n is the required sample size per section

Z is the Z-value corresponding to the desired confidence level (for 90% confidence, Z = 1.645)

p is the estimated proportion of stalks damaged in the section (unknown, but assumed to be around 0.5 for a conservative estimate)

d is the desired precision (0.02)

Plugging in the values, we can calculate the sample size needed for each section.

n = [(1.645 * sqrt(0.5 * (1 - 0.5)) / 0.02)^2] * 2

n ≈ 664.86

Rounding up, we arrive at approximately 665 stalks that should be sampled from each section.

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Answer:

x = 1/2

Step-by-step explanation:

mark brainliest

Answer:

3

Step-by-step explana

sorry if its wrong

Answer:

Step-by-step explanation:

This is part of the Isosceles Triangle Theorem. If one theta is equal to the other theta (and they are or else they wouldn't both be theta; one would be theta and the other might be beta), that means that the sides across from those congruent angles are also congruent. That means that

6x + 6 = 9x - 9 and

15 = 3x so

x = 5