PLEASE HELP! BRAINLIEST!!!!!!! PLEASE

Jade used candle molds, as shown, to make candles that were perfect cylinders and spheres:

What is the approximate difference in the amount of wax needed to make a candle from each of these molds? (Use π = 3.14.)

27.0 cubic inches
47.1 cubic inches
84.78 cubic inches
91.12 cubic inches

When finding the volume for a cylinder you use V=Bh or in this case...3.14xr squared. 3.14x3 squared by 2. This equals 28.26 when after rounding. Then for a sphere the formula is V=4/3x3.7x2 cubed by 3. This equals 220 after rounded. Subtract those and you have yourself your answer.

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prestonshelton prestonshelton · Answer 2 · 2018-05-09T16:49:20+02:00

Hello!

First you have to find the volume of the cylinder

To find the volume of a cylinder you use the equation

[tex]V = \pi r^{2} h[/tex]

V is volume
r is radius
h is height

Put in the values you know and 3.14 for pi

[tex]V = 3.14 * 3^{2} * 7[/tex]

Square the number

V = 3.14 * 9 * 7

Multiply

V = 197.82
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Next you find the volume of the sphere

To find the volume of a sphere you use the equation

[tex]V = \frac{4}{3} \pi r^{3} [/tex]

V is volume
r is radius

Put in the values you know and 3.14 for pi

[tex]V = \frac{4}{3} * 3.14 * 3^{3} [/tex]

Cube the number

[tex]V = \frac{4}{3} * 3.14 * 27[/tex]

Multiply

V = 113.04
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Finally you subtract the two volumes from each other

197.82 - 113.04 = 84.78
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The answer is C)84.78

Hope this helps!