Ask question

Ask question

All categories

4 years ago

5

The amount of sales tax on a clothing purchase is directly proportional to the purchase price of the clothing. The sales tax on

a $60 sweater is $4.20. Determine the constant of variation (sales tax percentage). please show work.

1 answer:

evablogger [386]4 years ago

6 0

the answer is 7% or 0.07 7%= sales tax percentage

You might be interested in

BigorU [14]

Answer:

24. because 2009-2005+20 = 24. hope that helps

5 0

3 years ago

Add 3 level scoops of mini chocolate chips and 1 level scoop of raisins to Container 1. If each scoop has the same number of ite

alex41 [277]

Answer:

75%

Step-by-step explanation:

3 0

3 years ago

How do you solve for elimination method

dezoksy [38]

<span>The elimination method for solving systems of linear equations uses the addition property of equality. You can add the same value to each side of an equation.</span>

<span>So if you have a system: x – 6 = −6 and x + y = 8, you can add x + y to the left side of the first equation and add 8 to the right side of the equation. And since x + y = 8, you are adding the same value to each side of the first equation.</span>

3 0

4 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95

Galina-37 [17]

Answer:

The minimum sample size required for the estimate is 345.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

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 $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

The standard deviation is known to be 1.8.

This means that $\sigma = 1.8$

What is the minimum sample size required for the estimate?

This is n for which M = 0.19. So

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

$0.19 = 1.96\frac{1.8}{\sqrt{n}}$

$0.19\sqrt{n} = 1.96*1.8$

$\sqrt{n} = \frac{1.96*1.8}{0.19}$

$(\sqrt{n})^2 = (\frac{1.96*1.8}{0.19})^2$

$n = 344.8$

Rounding up to the next integer:

The minimum sample size required for the estimate is 345.

8 0

3 years ago

Evaluate plzz x^2-8x+4 <br> x=3<br> fwee poitns

Lubov Fominskaja [6]

Answer:

x^2-8x+4=dUcK.

Step-by-step explanation:

yoink thx for points

7 0

3 years ago

Read 2 more answers