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3 years ago

14

The plan charges $0.10 for each additional minute you talk. You use 50 additional minutes this month. What is your bill for the

month?

2 answers:

emmainna [20.7K]3 years ago

7 0

It's going to be a 5.00 dollar bill

Masja [62]3 years ago

3 0

$5 since you need to multiply you do 0.10×50=5.00

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If you cannot see the photo the question is A rental car charges 160.00 per week plus 0.25 per mile to rent a car. How many mile

Rzqust [24]

Answer:

You can travel 630 miles.

Step-by-step explanation:

317.5 - 160 = 157.5

157.5 / .25 = 630

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3 years ago

How do you do addition and subtraction in Scientific Notatation?

nekit [7.7K]

Once the numbers<span> have the same base and exponents, we can </span>add<span> or </span>subtract their<span> coefficients. </span><span> Determine the </span>number<span> by which to increase the smaller exponent by so it is equal to the bigger exponent.

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3 years ago

20 POINTS!!!! will give more if verified

DaniilM [7]

Answer:

The bottom one. The side with the 12 x 5 side.

Step-by-step explanation:

12 x 5 =60. That is bigger than the other sides

4 0

2 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

7 0

3 years ago

Which of the following states that if the product of two real numbers is zero,then either of the two is equal to zero or both nu

Lesechka [4]

Answer:

Zero Product Property

Step-by-step explanation:

If you have the following options:

A. Multiplication property

<u>B. Zero product property</u>

C. Identity property

D. Transitive property

3 0

3 years ago