Consider a function 
. If the graph of 
is above the horizontal axis, what can be said about the graph of f?
?
A. The graph of f is above the horizontal axis.
B. The graph of f is below the horizontal axis.
C. The graph of f is increasing.
D. The graph of f is a straight line.
Answer: C
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Solve the problem.If the rectangle below is a golden rectangle (with x as the shorter side), then the approximate value of x is
A. 89.
B. 55.
C. 34.
D. 89 
.
E. none of these
Solve.The inequality |x - 21.6| ? 0.4 describes the range of acceptable lengths x, in centimeters, of a certain metal rod used in a manufacturing process. Solve the inequality and interpret the solution.
A. 
; the length of the metal rod is acceptable between a low of 22 cm and a high of 22.4 cm.
B. 
; the length of the metal rod is acceptable between a low of 21.2 cm and a high of 22 cm.
C. (-?, 
? 
?); the length of the metal rod is acceptable at or below 21.2 cm and at or above 22 cm.
D. (-?, 
? 
?); the length of the metal rod is acceptable at or below 22 cm and at or above 22.4 cm.
Perform the indicated operation. Write the answer in proper scientific notation.(6.8 × 10-9) × (3.5 × 105)
A. 23.8 × 10-3 B. 2.38 × 10-4 C. 2.38 × 10-3 D. 2.38 × 10-5
Change to a mixed number.
A. 16
B. 
C. 113
D. 113