Answer:
B
Step-by-step explanation:
78x9=702
702/6=117 minutes.
Volume of water in the tank:
Differentiate both sides with respect to time t :
V changes at a rate of 2000 cc/min (cubic cm per minute); use this to solve for dh/dt :
(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)
(7y)² = 7²×y² = 49y²
Its 6.5
9514 1404 393
-1/2
The factor outside parentheses multiplies each term inside.
5/2(-8/5 +7/5)
= (5/2)(-8/5) +(5/2)(7/5)
= -8/2 +7/2 = -1/2
