3 years ago

A spheres radius is multiplied by 2. How is it’s surface area affected

Mathematics

1 answer:

dexar [7]3 years ago

3 0

Answer:

The surface area is multiplied by 3.

Step-by-step explanation:

If r is the radius of a sphere its surface area = 4(pi)r^2. If the radius is doubled then its surface area = 4(pi)(2r)^2 = 4*4(pi)r^2. So the surface area becomes 4-fold or the increase in surface area is 300%.

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Lerok [7]

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3 years ago

2+1.25f=10−2.75f solve for f

Inga [223]

Hey there!

2 + 1.25f = 10 - 2.75f
Add 2.75f to both sides.

1.25f + 2.75f = 4f

4f + 2 = 10
Subtract 2 from both sides.

4f = 8
Divide both sides by 4 to solve for f.

f = 2

I hope this helps!

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3 years ago

12 is 80% of what number

nydimaria [60]

X - the number

$80\%x=12 \\
\frac{80}{100}x=12 \\
\frac{4}{5}x=12 \\
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3 years ago

Read 2 more answers

Bags of sugar come in 3 sizes. Small bag: A 175 g bag costs 45p. Medium bag: A 420 g bag costs £1.13. Large bag: A 1.2 kg bag co

kotegsom [21]

Answer:

a 3.889

b 3.735

c 4.013

Step-by-step explanation:

a. 45p is 0 175/45=3.889

b 420/113= 3.735

c1.2kg= 1200g /299 =4.013

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3 years ago

How much does each fruit cost?

Taya2010 [7]

Answer:

They cost 25c

Step-by-step explanation:

100÷4 is 25

and boom mark brainliest pls

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3 years ago