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Flauer [41]
3 years ago
12

(0.7) exponent 2 please help!

Mathematics
1 answer:
ratelena [41]3 years ago
7 0
The answer is 0.49
0.7 x 0.7 = 0.7^2
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Katrina wants to estimate the proportion of adults who read at least 10 books last year. to do​ so, she obtains a simple random
Vaselesa [24]
E=Z*sqrt (p(1-p)/N), where E= error margin, p=proportion, N=sample size

Katrina's margin error at 85% confidence interval: E=1.96*sqrt (p(1-p)/100) = 0.196 sqrt (1(1-p))

Mathew's margin error at 99% confidence interval: E= 2.58*sqrt (p(1-p)/400) = 0.129 sqrt (p(1-p))

Since both obtained same estimate of proportion (that is, value of p), it can be seen that Mathew's estimate will have a small error (That is, 0.129 is smaller than 0.196). This can be attributed to larger sample size although a wider confidence (99%) interval was considered.
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3 years ago
On a spinner, there are twenty equal-size sections numbered from 1 to 20. What is the likelihood that the spinner will stop on a
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0.65

Step-by-step explanation:

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3 years ago
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A star in the sky appears to move by 12 arcseconds over the course of 6 months. Convert this number into first areminutes then d
Bumek [7]

Answer:

Given :A star in the sky appears to move by 12 arc seconds over the course of 6 months.

To Find :Convert this number into first arc minutes then degrees.

Solution:

60 arc seconds = 1 arc minute

1 arc seconds = \frac{1}{60} arc minute

12 arc seconds = \frac{1}{60} \times 12 arc minute

12 arc seconds = \frac{1}{5} arc minute

So, 12 arc seconds = \frac{1}{5} arc minute

Now convert it into degrees

60 arc minute = 1 degree

1 arc minute = \frac{1}{60} degree

\frac{1}{5} arc minute = \frac{1}{60} \times \frac{1}{5} degree

\frac{1}{5} arc minute = \frac{1}{300} degrees

12 arc seconds = \frac{1}{300} degrees

8 0
3 years ago
A rectangle's length to width ratio is 9:4. If its length is 14 cm more than its width, what is its area?​
sergiy2304 [10]
The area of the rectangle should be 87.1cm^2
6 0
3 years ago
Each cylinder is 12 cm high with a diameter of 8 cm.
ludmilkaskok [199]

Answer:

<h2>Volume = 576cm^3</h2>

Step-by-step explanation:

h = 12 cm\\d = 8cm\\r =d/2 = 8/2 =4\\V = ?\\V =\pi r^2h\\\\V= 3 \times 4^2\times12\\V = 576 cm^3

6 0
3 years ago
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