3 years ago

Suppose the circumference of a circle is 2pi what is its area?

Mathematics

1 answer:

soldi70 [24.7K]3 years ago

5 0

Circumference=2πr
2π=2πr
r=1

area=πr^2
area=π(1)^2
area=π

You might be interested in

Select the correct answer.<br> Σ(-)),<br> Which expression gives the same result as t=0

Monica [59]

Answer:

Step-by-step explanation:

since 5 is constant so you can take it out from the summation

6 0

2 years ago

How many thousandths are in 4 hundredths?

Rus_ich [418]

<span>4 hundredths equal 400 thousandths because hundredths to thousandths is increased by 100.</span>

6 0

2 years ago

Read 2 more answers

A mother is 46 years old and her son is 21 years old in 2021. In what year was the mother six times as old as the son ?

sergiy2304 [10]

Answer:1981

Step-by-step explanation:

5 0

1 year ago

Find an equation of the line that passes through the given point and has the indicated slope:

grin007 [14]

Y=3x-2 because (0,-2) is the y intercept (b) and m is the slope.

5 0

3 years ago

Read 2 more answers

An experiment consists of tossing 7 fair (not weighted) coins, except one of the 7 coins has a head on both sides. Compute the

PilotLPTM [1.2K]

Answer:

Step-by-step explanation:

Out of the 7 coins, one is fake and has heads on both sides. So, fake coin on toss coin will always turns up to be head.

Therefore, to obtain the probability of exactly 5 heads is:

probability of getting exactly 4 heads from the 6 fair coins

Probability of getting heads, p = $\frac{1}{2}
$

Probability of not getting head, q = 1 - p = $\frac{1}{2}
$

Now, by Binomial distribution with:

p = $\frac{1}{2}
$ = 0.5

q = $\frac{1}{2}
$ = 0.5

n = 6

P(X = r) = $^{n}C_{r} p^{r} q^{n - r}$

P(X = 4) = $^{6}C_{4} p^{4} q^{2}$

P(X = 4) = $^{6}C_{4} \times 0.5^{4}\times 0.5^{2}$

P(X = 4) = $\frac{6!}{4!(6 - 4)!} \times 0.5^{4}\times 0.5^{2}$

On solving the above eqn, we get:

P(X = 4) = 0.2344

Therefore, the probability of getting exactly 5 heads is 0.2344

7 0

3 years ago