Ira S. answered • 06/24/17

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I think you may have meant T = T

_{0}*10^{-kt}so that you get the equationT= 100*10

^{-kt}so that at t=0 you get 100.Now at t=5 you drop 40 to 60 so T=60. Substituting in you get

60 = 100*10

^{-5k}and you can figure out k.6 = 10

^{-5k}log .6 = -5k

k=log.6/(-5) = .04437

So your function becomes T=100*10

^{-.04437t}Now that you found that constant and have the equation, you can just substitute t=15 to get your answer.

T = 100 * 10

^{-.04437(15)}T= 21.6 degrees.

Hopefully I'm interpreting your problem correctly for you. Hope this helped.

Jordan K.

its because instead of substituting 60 degrees, 40 degrees was meant to be subbed as after 5 minutes the temperature drops to 40 degrees NOT 60 DEGREES

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08/24/17

Jenille D.

06/25/17