3 years ago

If the surface area of a sphere is 100π cm^2, what is the radius?

1 answer:

3 0

Surface area of sphere=100pi cm^2
4pi×r^2=100 pi
pi cancel on both sides
4×r^2=100
r^2=100/4
r^2=25
so r=5
So option b 5 cm is correct.

You might be interested in

What are the roots of x in the equation −4−14x=x+5 ?

kow [346]

First you would subtract x from both sides to move all the x's to one side Then you would add 4 to both side to move all the non x's to one side Lastly divide by negative 15 to have x by itself 9/-15 =-.6 So x as has root at x=-0.6

4 0

4 years ago

Simplify (y+1)^5 ÷ (y+1)^2

valentinak56 [21]

Answer:

Step-by-step explanation:

$\frac{a^{m}}{a^{n}}=a^{m-n}$

$\frac{(y+1)^5}{(y+1)^2}=(y+1)^{(5-2)}\\=(y+1)^{3}$

7 0

3 years ago

I don’t know if this answer is correct !!!!!!!! WILL MARK BRIANLIEST !!!!!!!!!!!!! PLEASE HELP

Nataly [62]

Answer:

What is this ?

Step-by-step explanation:

Sorry i can't answer it because i can't see it.

7 0

3 years ago

Read 2 more answers

5:7 and 2:11 are in equal ratios? True OR False? *

balandron [24]

Answer: false

Step-by-step explanation:

7 0

3 years ago

Please help I dont understand

riadik2000 [5.3K]

Answer:

2.1

Step-by-step explanation:

By the Law of Cosines,

a² = 5² + 6² - 2(5)(6)cos(20°)

a = sqrt(5² + 6² - 2(5)(6)cos(20°)), which is about 2.1

7 0

2 years ago