Can someone me find area! and explain to me how to do it? asap

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8

Arock was dropped from the top of a building. the function that describes the height after it was dropped is f(x)=64-16x^2. what are the zeros of the function and what do they mean?

What is the product of (4x + - 5)? a) -8x^2 - 26x - 15 b) -8x^2 + 26x - 15 c) -8x^2 - 26x + 15