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2 years ago

The radius of a circle is 9 centimeters what is the circles circumference

Mathematics

2 answers:

kifflom [539]2 years ago

8 0

Answer:

18π cm or 56.52cm

Step-by-step explanation:

Circumference = 2πr

2π(9)

18π

18π = 56.52

neonofarm [45]2 years ago

6 0

Answer:

56.55

Step-by-step explanation:

C=2πr=2·π·9≈56.54867

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Aliun [14]

Answer:

The Answer is: x / y = 8 / 3

Step-by-step explanation:

3(x - 2) - 4(2y - 1) + 2=0

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8 0

2 years ago

Read 2 more answers

For a group of 100 people, compute(a) the expected number of days of the year that are birthdays of exactly 3 people.(b) the exp

Scilla [17]

Answer:

Step-by-step explanation:

Leaving leap years, a year contains 365 days.

For a group of 100 people, each person is independent of the other and probability of any day being his birthday has a chance of

$\frac{1}{365}$

a) Probability that exactly 3 people have same birthday = $\frac{1}{365^3}$

Each day is independent of the other

And hence no of days having exactly 3 persons birthday out of 100 persons is binomial with n = 365 and p = $\frac{1}{365^3}$

Expected value of days = np = $\frac{1}{365^2}$

b) Distinct birthdays is binomail with p =1/365 and n = 365

Hence

expected value = np =1

4 0

3 years ago

Find the equation of the circle with center at (-1, 3) and radius of 4.

Nataly [62]

Answer:

(x+1)^2 + (y-3)^2 = 16

Step-by-step explanation:

The equation of a circle is given by

(x-h)^2 + (y-k)^2 = r^2

Where (h,k) is the center and r is the radius

(x--1)^2 + (y-3)^2 = 4^2

(x+1)^2 + (y-3)^2 = 4^2

(x+1)^2 + (y-3)^2 = 16

7 0

2 years ago

X > 2 and x < 7<br><br>I don't understand

valentinak56 [21]

It means that x value is between 2 to 7 ( more than 2, but less than 7)
In notation, 2 < x < 7 or (2,7).

3 0

2 years ago

100 POINT QUESTION + BRANLIESt What is 2+2?

Maru [420]

Answer:

Step-by-step explanation:

Yeah if you don't know this one... you're... special.

4 0

2 years ago

Read 2 more answers