Suppose an Eight-Pound Object Is Dropped from a Height of 5000

Suppose an eight-pound object is dropped from a height of 5000 feet, where the air resistance is proportional to the velocity. Write the velocity as a function of time if its velocity after 7 seconds is approximately -75 feet per second. Use a graphing utility or a computer algebra system. Round numerical answers in your answer to four places.

A)
B)
C) 0.8018
D)
E)