ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. If an object is thrown in an upward direction from the top of a building 160 ft high at an initial speed of 30 mi/h, what is
its final speed when it hits the ground? (Disregard wind resistance. Do not reflect negative direction in your answer.)

110 fts
91 ft/s
97 ft/s
100 ft/s