A football is kicked vertically upward from a height of 4 feet with an initial speed of 60 peet per second. The formula describes the height of the ball above the ground, , in feet, seconds after it was kicked. Use the formula to determine the height of the ball 1 seconds after it was kicked.
(Note: Enter your answer as a decimal number and do not forget to include the units, e.g. 100 .)

Answer: