Each CD is approximately 4.72 inches in circumference and 0.05 inches in depth. There
are 15 CDs in the stack. Use the Cavalieri's Principle to find the surface area of the stack
of CDs. Justify your answer.
Answer
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Step-by-step explanation:

we know that

The Cavalieri's principle states that if two solids are of equal height and the sections "matching" equal areas everywhere along the height, the solids have the same volume.

The surface area of the stack is given by the formula

where

B is the area of the base

LA is the lateral area

The lateral area of the stack, using Cavalieri's Principle, is equal to the lateral area of one CD multiplied by the total number of CDs of the stack

so

Find the radius of CD

Remember that the circumference is given by the formula

we have

substitute

solve for r

Find the area of CD

substitute

therefore

The surface area of the stack is equal to

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)

is this part of a question or something