Question

The temperature of a roast varies according to Newton's Law of Cooling: dT /dt equals negative k times the quantity T minus A, where T is the water temperature, A is the room temperature, and k is a positive constant.
If a room temperature roast cools from 68°F to 25°F in 5 hours at freezer temperature of 20°F, how long (to the nearest hour) will it take the roast to cool to 21°F?

a: 1
b: 9
c: 12
d: 24

Answer 1

@nirmalnema

Answer 2

@Luigi0210 can u plz help? :)

Answer 3

the formula is dT=k(T_t-T_s)

Answer 4

@aaronq @pooja195

Answer 5

@ahamed. ok :) i plug the variables in?

Answer 6

let me see

Answer 7

ok :)
@paki

Answer 8

@Destinymasha

Answer 9

@hartnn

Answer 10

no freaking idea

Answer 11

lol thank u anyways! :)