An Airplane travels at a constant speed of 300 miles per hour how far in miles will the airplane travel in 20 minutes

Prove that quadrilateral is a rhombus.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Simplify the following expression 48^1/2