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3 years ago

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Jan’s salary is 30000 and it will increase by 3000 each year. Phil’s salary is 20,000 and will be increased by 5,000 each year.

In how many years will Jan and Phil have the same yearly salary

1 answer:

lara31 [8.8K]3 years ago

7 0

Answer:

5 years

Solution:

3,000 × 5 = 15,000

30,000 + 15,000 = 45,000

5,000 × 5 = 25,000

20,000 + 25,000 = 45,000

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Suppose a sample of 80 with a sample proportion of 0.58 is taken from a

Anvisha [2.4K]

Answer:

99.7% confidence interval is $[0.4162,0.7437]$

Step-by-step explanation:

The formula for a confidence interval for a population proportion is $CI=\hat{p}\pm z^*\sqrt{\frac{\hat{p}(1-\hat{p})}{n} }$ where $\hat{p}$ is the sample proportion, $n$ is the sample size, and $z^*$ is the critical score for the desired confidence level.

We are given a sample size of $n=80$ and a sample proportion of $\hat{p}=0.58$ . Our critical score for a 99.7% confidence level would be $z^*=normalcdf(0.9985,0,1)=2.9677$

Therefore, the approximate 99.7% confidence interval for the population parameter is $CI=\hat{p}\pm z^*\sqrt{\frac{\hat{p}(1-\hat{p})}{n} }=0.58\pm 2.9677\sqrt{\frac{0.58(1-0.58)}{80} }=[0.4162,0.7438]$

So we are 99.7% confident that the true population proportion is contained within the interval $[0.4162,0.7437]$

3 0

3 years ago

X/3=x+2/5 soo...x=___

Stolb23 [73]

X/3 = x + 2/5....multiply everything by common denominator of 15
5x = 15x + 6
5x - 15x = 6
-10x = 6
x = -6/10 reduces to - 3/5

or...
x/3 is the same as 1/3x

1/3x = x + 2/5
1/3x - x = 2/5
1/3x - 3/3x = 2/5
-2/3x = 2/5
x = 2/5 * -3/2
x = - 6/10 which reduces to - 3/5

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3 years ago

The grades on a physics midterm at Covington are roughly symmetric with = 72 and = 2.0. Stephanie scored 74 on the exam. Find th

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Answer:1.00

Step-by-step explanation:

A=74-72/2.0

And I did it on kahn

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3 years ago

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Is this expression a monomial, binomial, or trinomial?

Verdich [7]

C. monomial because xy is only one number and not two.

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3 years ago

1. Melinda's fudge recipe calls for 34 cup of butter for one batch of fudge. She plans to make 8 batches. How many cups of butte

zhuklara [117]

Answer:

272 cups

Step-by-step explanation:

so you need 34 cups for one batch if you need to make 8 batches then you would need to multiple them to find the answer.

34*8=272

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3 years ago