All categories

2 years ago

The diameter of a circle is 8 cm. find it's area in terms of pi

Mathematics

2 answers:

nydimaria [60]2 years ago

3 0

Answer:

d=8

r=d/2

r=4

a=πr^2

=22/7×4×4

=50.28

sineoko [7]2 years ago

3 0

The answer is 50.27cm to the second power

You might be interested in

The 2000 population of a city was 710,000 and was increasing at the rate of 1.49 % each year. At that rate, when will the popu

AlekseyPX

Answer:

23.1567

Step-by-step explanation:

710000(1+1.49/100)ⁿ=1000000

710000×1.0149ⁿ=1000000

1000000÷710000=1.0149ⁿ

1.4084507=1.049ⁿ

log1.4084507=ⁿlog1.0149

log1.4084507/log1.0149=ⁿ

7 0

3 years ago

21+[36devided(12-6)+2-5]multiply3

Alona [7]

12-6=6
6+2=8-5=3
21+3x3=72

4 0

3 years ago

Read 2 more answers

Find the area of the figure.

Vesnalui [34]

Answer:

AREA = 4,850

Step-by-step explanation:

split into two pieces

formula for triangles- base x height divided by 2

20 x 50 = 100 / 2 = 50

(130 - 50 = 80)

80 x 120 = 9,600 / 2 = 4,800

add...

4,800 + 50 = 4,850

5 0

2 years ago

Hep I’ll give brainliest

PilotLPTM [1.2K]

Use this to help you.

6 0

3 years ago

Read 2 more answers

A multiple choice test has four possible answers for each question. Let X be the number of correct responses in a test of 100 qu

dimulka [17.4K]

Answer:

a. 4.33.

Step-by-step explanation:

If there is only one correct answer out of four alternatives, the expected proportion of correct answers is p =0.25

Sample size (n) = 100 questions

The standard deviation of a proportion 'p' is given by:

$s=\sqrt{\frac{p*(1-p)}{n} }$

Applying the given data:

$s=\sqrt{\frac{0.25*(1-0.25)}{100}}\\s=0.0433$

If X is the number of correct responses in 100 guesses, the standard deviation of X is:

$\sigma = n*s=100*0.0433\\\sigma = 4.33$

The standard deviation of X is 4.33 questions.

7 0

3 years ago

The diameter of a circle is 8 cm. find it's area in terms of pi​

The diameter of a circle is 8 cm. find it's area in terms of pi