Solve the problem.Suppose 
is a mathematical model for actual time as a function of estimated time, where f(x) represents actual time (in minutes), x represents estimated time (in minutes), and m and b are constants. If 
and b = -3, find f(x) when x is 60 minutes.
A. 67.8 min
B. 153 min
C. 159 min
D. 52.2 min
Answer: B
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Calculate the area of the surface S. S is the portion of the cone 
+ 
= 
that lies between z = 2 and z = 4.
A. 
?
B. 
C. 
?
D. 
?
Find the x- and y-intercepts. If no x-intercepts exist, state so. Round to two decimal places if necessary.f(x) = -x2 + 4x - 8
A. 
, (0, -8)
B. No x-intercepts, (0, 8)
C. No x-intercepts, (0, -8)
D. 
, (0, 8)
Solve the problem.If P = (7, -10) and Q = (x, 74), find all numbers x such that the vector represented by 
has length 91.
A. {-28, 49} B. {-42, 42} C. {-42, -28} D. {-28, 42}
Solve the problem.Twin City Freezer accepts a note with face value of $6,920 on June 1. The note is for 90 days at 8% interest. The note is discounted on July 24 at 9%. Find the proceeds.
A. $6,993.11 B. $7,000.36 C. $6,991.35 D. $6,912.36