Ying is a professional deep water free diver. His altitude (in meters relative to sea level), a seconds after diving, is modeled

Question

Ying is a professional deep water free diver.
His altitude (in meters relative to sea level), a seconds after diving, is modeled by:
D(x) = 1/36(x-60)² - 100
How many seconds after diving will Ying reach his lowest altitude?

Kunduz · Accepted Answer

Click to see the answer