At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 15.2 and 16.1 seconds
A. 50%
B. 34%
C. 68%
D. 13.5%
Answer: B
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Solve the equation.x2 - x = 72
A. {1, 72} B. {-8, 9} C. {8, 9} D. {-8, -9}
Find the average value of 
over the given region.
over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 45
B. 20
C. 
D. 30
Write an equation for a function whose graph fits the given description.The graph of f(x) = 
is reflected across the y-axis. This graph is then vertically stretched by a factor of 5.3. Finally, the graph is shifted 10 units downward.
A. f(x) = 5.3
+ 10
B. f(x) = -5.3
- 10
C. f(x) = 10
- 5.3
D. f(x) = 5.3
- 10
List the critical values of the related function. Then solve the inequality.
< 0
A. -1, 5; (-1, 5) B. -6, -5, -1, 5; (-6, -5) ? (-1, 5) C. -6, -5, -1, 5; (-?, -6) ? (-5, -1) ? (5, ?) D. -5, 1, 5, 6; (-?, -5) ? (1, 5) ? (6, ?)