Use the absolute value to express the distance between the points with coordinates a and b on the number line. Then determine this distance by evaluating the absolute value expression.a = 17 and b = -13
A. 
= -4
B. 
= 30
C. 
= -30
D. 
= 4
Answer: B
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Find the derivative.f(x) = 
A. - 
x-7/6
B. - 
x-7/6
C. 
x-5/6
D. 
x5/6
Find the solution set for the equation.|7s - 8| = |s + 7|
A. {
, 
}
B. {- 
, - 
}
C. {
, - 
}
D. ?
Minimize 
with 
.
?
A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.When a dead body is discovered, one of the first steps in the ensuing investigation is for a medical examiner to determine the time of death as closely as possible. If the temperature of the medium has been fairly constant and less than 48 hours have passed since death, Newton's law of cooling can be used. Newton's law of cooling states, 
, where k is a constant, T is the temperature of the object after t hours, and TM is the (constant) temperature of the surrounding medium. Assuming the temperature of a body at death is 98.6°F, the temperature of the surrounding air is 69°F, and at the end of one hour the body temperature is 90°F, when will the
temperature of the body be 76°F? Round to the nearest tenth of an hour. A. 2 hr B. 0.7 hr C. 4.2 hr D. 0.3 hr