Answer: the answer would be C.
Explanation: hope this helps sorry if I got it wrong.
Answer:
Mass = 8kg
Force = 78.4
Acceleration = ?
Now,
According to formula,
Force = Mass*Acceleration
78.4N = 8kg*Acceleration
78.4/8 = Acceleration
Acceleration(a) = 9.8 m/s^2
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Answer:
Rate of change of water will be -6 gallon/minute
Explanation:
We have given water in the tank as the function of time as

We have to find the rate of change of water in the tank at t = 3 minute
For rate of change we have to differentiate both side
So 
At t = 3 minute

False
explanation: Weight is the pull of Earth on an object. It depends on the distance from the center of Earth. Unlike weight, mass does not vary with location. The mass of an object is the same on Earth, in orbit, or on the surface of the Moon.