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leva [86]
3 years ago
14

At a new store a CD costs $15.99. At a second store the same CD costs 0.75 as much. About how much does the second store charge?

Mathematics
1 answer:
evablogger [386]3 years ago
8 0
It costs about 11.99 at the second store
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PLEASE HELP, IT'S ARGENT!
ANTONII [103]

Answer:

I'm guessing the right answer should be B

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3 years ago
If a textbook has a mass of 2.2kg and weighs 19.6 newtons on Venus what is the strength of gravity on Venus?
Neporo4naja [7]
G=mg=>g=G/m=8,9m/s^2
7 0
3 years ago
A politician estimates that 61% of his constituents will vote for him in the coming election. How many constituents are required
Katyanochek1 [597]

Using the z-distribution, as we are working with a proportion, it is found that 1016 constituents are required.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

The margin of error is given by:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

The estimate is of \pi = 0.61, while the margin of error is of M = 0.03, hence solving for n we find the minimum sample size.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.96\sqrt{\frac{0.61(0.39)}{n}}

0.03\sqrt{n} = 1.96\sqrt{0.61(0.39)}

\sqrt{n} = \frac{1.96\sqrt{0.61(0.39)}}{0.03}

(\sqrt{n})^2 = \left(\frac{1.96\sqrt{0.61(0.39)}}{0.03}\right)^2

n = 1015.5

Rounding up, 1016 constituents are required.

More can be learned about the z-distribution at brainly.com/question/25890103

8 0
2 years ago
Solve for <br> 3x + 12= -12
oee [108]

Answer:

x = -8

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 12 from both sides:

3x + 12 (-12) = -12 (-12)

3x = -12 - 12

3x = -24

Next, divide 3 from both sides:

(3x)/3 = (-24)/3

x = -24/3

x = -8

x = -8 is your answer.

~

4 0
3 years ago
Read 2 more answers
Write the following statements in equation form: If the sum of a number and its two fifth is 70
iren [92.7K]

Answer:

x +  \frac{2}{5}  \times x = 70 \\ x +  \frac{2}{5} x = 70

6 0
3 years ago
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