Please help me maath math

Is every rectangle is a parallelogram? true false

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

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