All categories

3 years ago

What is the circumference of a circular park with a radius of 100 meters? (Round your answer to the nearest tenth.)

Mathematics

2 answers:

Scilla [17]3 years ago

7 0

Radius = 100m
Circumference of a circle = 2πr
= 2 × π× 100
=628.31m

PSYCHO15rus [73]3 years ago

7 0

Circumference=2πr
=2×22/7×100 m
=4400/7 m
=628.57 m
=630 m

You might be interested in

Hugo is a veterinarian

marin [14]

Answer:

Is this mathematics?

Cos I don't get

6 0

3 years ago

Read 2 more answers

The First aircraft has 80 more seats than the second aircraft. The third aircraft has 61 fever seats than the second aircraft. i

kotykmax [81]

Step-by-step explanation:

b=a-80

c=b-61

c=a-141

a+b+c=3a-221=430

3a=651

a=217 & b =137 & c=76

3 0

3 years ago

Help fast!! (no links please.)

amid [387]

Answer:

C) 3

Step-by-step explanation:

Plug in the values on c and d and solve

((3)^2 + (2)^2) - 2((3)^2 - (2)^2)

Solve inside the parenthesis first

(9+4) - 2(9-4) = (13) - 2(5)

Distribute the 2 and solve

13 - 10 = 3

4 0

2 years ago

Pure salt is made up of sodium and chloride. Each gram

expeople1 [14]

Answer:

141.73g

Step-by-step explanation:

4 0

3 years ago

The area of a circular oil slick on the surface of the sea is increasing at a rate of [150m^2/s] how fast is the radius changing

Akimi4 [234]

Answer with Step-by-step explanation:

We are given that

$\frac{dA}{dt}=150m^2/s$

a.Radius =25 m

We have to find rate of change of radius.

We know that

Area of circle, $A=\pi r^2$

Differentiate w.r.t time

$\frac{dA}{dt}=2\pi r\frac{dr}{dt}$

Substitute the values then we get

$150=2\pi (25)\frac{dr}{dt}$

$\frac{dr}{dt}=\frac{150}{50\pi}=\frac{3}{\pi} m/s$

$\frac{dr}{dt}=\frac{3}{\pi} m/s$

b.A= $1000m^2$

Substitute the values then we get

$1000=\pi r^2$

$\pi=3.14$

$r^2=\frac{1000}{3.14}$

$r=\sqrt{\frac{1000}{3.14}}=17.8m$

$\frac{dA}{dr}=2\pi r\frac{dr}{dt}$

Substitute the values then we get

$150=2\pi(17.8)\frac{dr}{dt}$

$\frac{dr}{dt}=\frac{150}{2\pi(17.8)}=\frac{150}{35.6\pi}$ m/s

$\frac{dr}{dt}=\frac{75}{17.8\pi}$ m/s

4 0

3 years ago