The function t=[(sqrt)(d/16)] models the time (t) in seconds that an object has been falling after the object has fallen d feet. When will the time be more than 1 minute?

Question

• d ≥ 16 ft
• d ≥ 225 ft
• d ≥ 3,600 ft
• d ≥ 57,600 ft

Answer 1

t=√(d/16)
so you want √(d/16) > 1
square both sides
d/16 > 1
d > 16

Answer 2

D. d>57600