Question

What is 6.4 × 10 to the −8 mi/day in feet per hour? (1 mi = 5280 ft)

A.
8.11 × 10 to the−3 ft/h

B.
1.408 × 10 to the −5 ft/h

C.
2.909 × 10 to the −10 ft/h

D.
5.05 × 10 to the−13 ft/h