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August 22, 2014

August 22, 2014

Posted by **someone** on Saturday, May 12, 2012 at 10:03pm.

but i keep getting it wrong any suggestions?

A roasted turkey is taken from an oven when its temperature has reached 185 Fahrenheit and is placed on a table in a room where the temperature is 75 Fahrenheit.

(a) If the temperature of the turkey is 153 Fahrenheit after half an hour, what is its temperature after 45 minutes?

Your answer is Fahrenheit.

(b) When will the trukey cool to 100 Fahrenheit?

Your answer is hours.

- Math -
**bobpursley**, Saturday, May 12, 2012 at 10:13pmI disagree with your equation. At time=0,

temp=70+110=180F However this does not match the problem description. So it makes sense that it should be

temp=75+110e^kt that works at time zero.

153=75+110e^k*.5

78=110 e^.5k

.0709=e^.5k

take the ln of each side

.0709=.5k

solve for k, then put it in the equation

temp=75+110e^kt

at you have k, and time as .75, solve for temp.

b. solve for time when temp=100

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