Please! I need help! Which expression is equivalent to 8?

Select all that apply.

2^1×2^3

2^6×2^−2

2^8×2^−5

2^3×2^3

2^1×2^2

2^2×2^2

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?