Question

the temperature H of a metal bar, in farenheight , a time t minitues past noon flunctuates according to H(t)=100+4sin(.2t)+8cos(0.6t) . at what rate is the temperature of the metal bar changing at 12:30

Answer 1

find H ' (30)

Answer 2

are you having trouble taking the derivative?

Answer 3

yes

Answer 4

so i find the derivative of the equation and the plug in 30?

Answer 5

yes:)

Answer 6

did you get the derivative? or still need help with that?

Answer 7

still need help i just want to make sure its correct

Answer 8

.8cos(.2t)-4.8sin(.6t).. that is the correct derivative ?

Answer 9

yes:)

Answer 10

yaay :) thank yoou so much

Answer 11

no problem:)