1. is the definition.

2. Not necessarily a right-angle prism

3. The bottom is not necessarily a parallelogram.

Two. Y = 95.76% (X/ 100)

Three.

AB is the radius of the bottom surface and the height is the distance from c to AB.

So V= 1/3*Sh

=3π/2

IV.2 ㏒ x25-3 ㏒ 25x =1

Transferred items: 2 logx25 = log25 (25 * x 3)

Bottom changing formula:

log25(25^2)/log25x=log25(25*x^3)

( 1+3*log25x)*log25x-2=0

Let log25x=t

Then the original formula can be changed to: (1+3t)*t-2=0.

Solution: t=- 1 or t=2/3.

So x= 1/25 or x=5* 5 under the cube root.