As per an estimate, the depth D(t), in centimeters, of th...

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505-555

Functions

As per an estimate, the depth D(t), in centimeters, of the water in a tank at t hours past 12:00 a.m. is given by

D(t)=-10(t-7)^2+100

, for

0 \le t \le 12

.
At what time does the depth of the water in the tank become the maximum?

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505-555

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