Using y =4x^2 +5x -21 find the actual slope of the curve at x = 2

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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)

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?