As an astronaut travels towards earth, her weight a. decreases because gravity decreases. b. decreases because her mass decreases. c. increases because gravity increases. d. remains the same because her mass remains the same.

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) ! : )