10. If a weightlifter lifts 2000 newtons to a height of 2 meters in 4 seconds, how powerful is he?
a. 100 watts
b. 500 watts
c.
1,000 watt
d. 16,000 watts

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )