What’s the answer i’m confused on how to do both

15/16 as a decimal rounded to the nearest hundredth

In which form is the following function written? y = - 2(x – 3)(x + 5)

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.