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2 years ago

Find the circumference of the circle and round to the nearest tenth

Mathematics

1 answer:

ikadub [295]2 years ago

8 0

Answer:

circumference of circle = 2×pi×r

circumference of circle = 2×3.14×12.7

circumference of circle = 79.756 in

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Use the formula to evaluate the senes 6 + 2 +2/3+2/9....

Kazeer [188]

Answer:

Step-by-step explanation:

a=6

r=2/6=1/3<1

$S_{\infty}=a/(1-r)=6/(1/3)=6*3=18$

6 0

2 years ago

If 8a + 3b + 2c = 3, what is 64a+24b+16c?

algol [13]

The second expression is 8 times the first so the answer is 3 * 8 = 24.

3 0

3 years ago

Read 2 more answers

How do you answer the question?

Lera25 [3.4K]

The answer is -37.

So, let's break this down:

(7 - 10 = -3)

[45 ÷ 3 = 15]

[15 x -3 = -45]

4 x 2 = 8

8 + -45 = -37

Hoped this helped :)

6 0

2 years ago

a square with an area of 144 cm² is reduced by a factor of 1/3 how long are the new sides of the square?

olga55 [171]

Answer:

4 cm

Step-by-step explanation:

The square root of 144 is 12 (12 x 12 = 144) so we know our sides of the square are 12 cm²

12 / 3 = 4

( $\frac{12}{1} x \frac{1}{3}$ )

The sides of the new square are 4 :)

Hope this helps and is correct, have a nice day! :D

3 0

2 years ago

A random sample of 84 students at a university showed an average age of 22 years and a sample standard deviation of 3 years. Fin

Debora [2.8K]

Answer:

The margin of error for the 94% confidence interval is 0.6154.

Step-by-step explanation:

The (1 - α)% confidence interval for population mean is:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

The margin of error of this interval is:

$MOE=z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

The critical value of z for 94% confidence level is, z = 1.88.

Compute the margin of error for the 94% confidence interval as follows:

$MOE=z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

$=1.88\times\frac{3}{\sqrt{84}}\\\\=0.6154$

Thus, the margin of error for the 94% confidence interval is 0.6154.

7 0

2 years ago