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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cestrela7 [59]

Answer:

$80 was on the gift card to begin with

Step-by-step explanation:

Let the initial money be x

Peter spent (1/2)*x

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After loading more money Peter had (1/2)x + 10

(1/2)x = 40 (money spent by Peter)

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x = 80

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3 years ago

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Step-by-step explanation:

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2 years ago

H=2.9L+78.1 About how tall would the male have been if the length of the humerus measured 39 cm?

dalvyx [7]

Answer:H=191.2

Step-by-step explanation:

H=2.9(39)+78.1

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3 years ago

5. How long is the diagona of a 12 ft-by-16 ft rectangular garden?

kupik [55]

Answer:

The correct answer is option D, 20ft

Step-by-step explanation:

After drawing the picture below, you can just use pythagorean theorem to solve for the diagonal, or the hypotenuse in this case;

(Length)² + (Width)² = (Diagonal)²

(16)² + (12)² = (Diagonal)²

256 + 144 = (Diagonal)²

400 = (Diagonal)²

$\sqrt{400}$ = $\sqrt{Diagonal^{2} }$

20 = Diagonal

Hope this helps!

7 0

2 years ago

Read 2 more answers