Fourth grade level. use mental math to find 7x53

We must first determine the shape of a rectangular prisms _ a0 to find area of the prism

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

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6