Newton's Law of Cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. Suppose that a roast turkey is taken from an oven when its temperature has reached 160°F and is placed on a table in a room where the temperature is 60°F . If is the temperature of the turkey after t minutes, then Newton's Law of Cooling implies that
This could be solved as a separable differential equation. Another method is to make the change
of variable y = u - 60. If the temperature of the turkey is 150°F after half an hour, what is the
temperature after 35 min?
a. t = 143°F
b. t = 148°F
c. t = 298F
d. none of these
e. t = 95°F
b. t = 148°F
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Solve: 
= 
A. 81 B. 60.17 C. 1140 D. 96
Find cos(A + B).cos A = - 
and tan B = 
, with A and B in quadrant III.
A. 
B. 
C. 
D. 
Solve the problem.Students at Maple School earned $326 selling candles. They want to accumulate $2000 for a club trip. What percent of their goal has been reached?
A. 6% B. 60% C. 0.163% D. 16.3%
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.-4x - 3y - z = -35 x - 6y + 6z = -28-8x + y + z = -5
A. (-2, 8, 4) B. (2, 3, 8) C. (2, 8, 3) D. No solution