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Suppose Neil Armstrong decided to throw a golf ball into the air while he was standing on the moon and that the height of the golf ball was modeled by the equation below, where s is measured in feet and t is measured in seconds. s(t)=-2.72t^2+26.9t+6. Find the best approximation for the instantaneous rate of change (velocity) of the golf ball at 7 seconds using 7.0001 seconds. Round to the nearest thousandth.

A pendulum swings from the ceiling. Its distance, d, in feet, from one wall of the room depends on the number of seconds, t, since it was set in motion. Assume that the equation from d as a function of t is d(t)=20+16cos((pi/3)t). You want to find out how fast the pendulum is moving at a given instant, t, and whether it is approaching or going away from the wall.

Find d when t=4.

Find d when t=4.

A pendulum swings from the ceiling. Its distance, d, in feet, from one wall of the room depends on the number of seconds, t, since it was set in motion. Assume that the equation from d as a function of t is d(t)=20+16cos((pi/3)t). You want to find out how fast the pendulum is moving at a given instant, t, and whether it is approaching or going away from the wall.

Estimate the instantaneous rate of change of d with respect to t when t=2.5 using 2.5001 seconds. Round to the nearest thousandth.

At that time, is the pendulum approaching the wall or moving away from it? Why? What is the distance doing?

Estimate the instantaneous rate of change of d with respect to t when t=2.5 using 2.5001 seconds. Round to the nearest thousandth.

At that time, is the pendulum approaching the wall or moving away from it? Why? What is the distance doing?

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