
#1
Oct1605, 04:37 PM

P: 85

A certain city, the temp in degrees Farenheit, t hrs after 9 am was modeled by the function: T(t)=50 + 14 sin (Pi t / 12)
Find avg temp during the period from 9 am to 9 pm. What i did was take the Int[50 + 14 sin (Pi t / 12),t,0,9]... but this doesnt produce the answer. It says model after 9 am so at 9=0 for a , b = 10 for 9pm? Any help? 



#2
Oct1605, 06:39 PM

P: 212

shouldnt b be 12 and not 10 since it is 12 hours from 9am  9pm




#3
Oct1605, 06:51 PM

HW Helper
P: 879

Set your limits a,b to a = 9 and b = 21 (using 24hr notation)




#4
Oct1605, 09:57 PM

P: 85

Integral Average Question
i tried 9 to 21 and it didnt work before...




#5
Oct1605, 10:06 PM

P: 85

it works from 0 to 12, thanks, dont know why i thought 10 DUH



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