A light truck with manual transmission has a circular brake drum with a diameter of 317 millimeters. Each brake pad, which presses against the drum, is 308 millimeters long. What central angle is subtended by one of the brake pads? Write your answer in both radians and in degrees.
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?a = 308 millimeters, b = 317 millimeters
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A. 2.14 radians, 113°
B. 2.04 radians, 110°
C. 1.94 radians, 111°
D. 2.34 radians, 107°
E. 1.64 radians, 114°
Answer: C
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You may wish to use the “Solve a Simpler Problem” strategy if:
(a) The problem involves very large or very small numbers. (b) There are a large number of cases. (c) A direct solution is too complex. (d) Both (a) and (b) are correct. (e) Both (a) and (c) are correct.
Solve the equation symbolically.x2 + 6x + 7 = x2 - 3
A. - 
B. All real numbers
C. No solution
D. 
Eliminate the parameter t in the following:
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A. 
, 
, 
B. 
, ,
C. 
, ,
D. 
, ,
E. 
, ,
Solve the problem.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula d = 
, where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 2 centimeters if it has a spring constant of 0.6.
A. W = 2d2k; 4.8 joules
B. W = 
; 13.3 joules
C. W = 
; 0.4 joules
D. W = 
; 1.2 joules