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3 years ago

Just need my answers checked.

Mathematics

1 answer:

Mariulka [41]3 years ago

5 0

I choose A 4x(x2 - 3x + 1)

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Find the surface area (in terms of π) of a sphere if its volume is 972 π.

Sholpan [36]

Surface area of sphere is $Surface\,\,Area=324\pi$

Step-by-step explanation:

We need to find the surface area of the sphere while we are given volume of sphere = 972π

The formula used to find surface area is:

$Surface\,\,Area=4\pi r^2$

We need to find radius of sphere

We are given Volume = 972π, using this volume we can find radius of sphere

The formula used to find volume is:

$Volume=\frac{4}{3}\pi r^3$

Putting values and finding r

$972\pi =\frac{4}{3}\pi r^3$

$r^3=\frac{972\pi *3}{4\pi } \\r^3=729$

Taking cube root on both sides

$\sqrt[3]{r^3}=\sqrt[3]{729}\\ r=9$

So, Radius of sphere r=9

Now finding surface area:

$Surface\,\,Area=4\pi r^2$

$Surface\,\,Area=4\pi (9)^2$

$Surface\,\,Area=4\pi 81$

$Surface\,\,Area=324\pi$

So, surface area of sphere is $Surface\,\,Area=324\pi$

Keywords: Surface area of sphere

Learn more about Surface area of sphere at:

#leanwithBrainly

8 0

3 years ago

H= ?<br> 1.8 m<br> 6m<br> 60m<br> Looking for meters!

leva [86]

Answer:

Step-by-step explanation:

7 0

2 years ago

How many subsets does A have?

finlep [7]

A set with n elements has 2^n subsets, including the empty set and the complete set.

Your set has 2^6 = 64 subsets.

7 0

3 years ago

Lisa drew a scale drawing of a house and its lot. She used the scale 1 inch : 3 feet. The backyard is 39 feet wide in real life.

jenyasd209 [6]

Answer:

13 inches

Step-by-step explanation:

1 inch = 3 feet

39 / 3 = 13

1 x 13 = 13

6 0

3 years ago

What is negative 7 minus negative 4

Nimfa-mama [501]

Answer:

-7-(-4)= -3

Step-by-step explanation:

Subtracting a negative number from a negative number – a minus sign followed by a negative sign, turns the two signs into a plus sign. So, instead of subtracting a negative, you are adding a positive.

3 0

3 years ago

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