How do i solve this problem ?

Mathematics
Tutor: None Selected Time limit: 1 Day

A roast is taken from the refrigerator (where it had been for several days) and placed immediately in a preheated oven to cook. The temperature R = R(t) of the roast t minutes after being placed in the oven is given below. R = 375 − 338e−0.007t  degrees Fahrenheit

(a) What is the temperature of the refrigerator?

(b) Express the temperature of the roast 45 minutes after being put in the oven in functional notation.

Calculate the value of the above term. (Round your answer to two decimal places.)

Aug 28th, 2015

Hi there! Thank you for the opportunity to help you with your question!

The temperature in the refrigerator is exactly the temperature at t=0: 

37 degrees Fahrenheit

(b) In functional notation, since t is measured in minutes, all we have to do is plug in 45 whenever we see t, in this case, the functional form is:

R(45)

The value of R(45) is given by:

128.33 degrees Fahrenheit


Please let me know if you need any clarification. Always glad to help!
Aug 28th, 2015

(c) By how much did the temperature of the roast increase during the first 8 minutes of cooking? (Round your answer to two decimal places.)
°F

(d) By how much did the temperature of the roast increase from the first hour to 8 minutes after the first hour of cooking? (Round your answer to two decimal places.)

Aug 28th, 2015

Is there any way you can make a new post with these questions? Website policy doesn't allow follow-ups that are not directly related to the questions I answered

Aug 28th, 2015

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