Simplify the expression.
A. 51
B. 32
C. 34
D. 85
Answer: C
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A child has 100 blocks that are 1-inch cubes. She arranges the blocks into a solid rectangle of length L and width W. The relationship between L and W is given by
.
A. Use a formula to express the perimeter P in terms of L and W.B. Use the relationship between L and W to express the perimeter in terms of L only.C. What values of and W give the smallest possible perimeter?
What will be an ideal response?
Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with vertices (0, ±9) and foci at 
.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
Using the decreasing-time algorithm to schedule this project with two processors, the total combined idle time of the two processors is
A. 5 hours. B. 1 hour. C. 7 hours. D. 3 hours. E. none of these
The average speed of a vehicle on a stretch of a route between 6 A.M. and 10 A.M. on a typical weekday is approximated by the function
?
, where 
is measured in miles per hour and 
is measured in hours, with 
corresponding to 6 A.M.
?
At what time of the morning commute is the traffic moving at the slowest rate? What is the average speed of a vehicle at that time?
?
A. time = 7 A.M. ; average speed = 50 mph
B. time = 7 A.M. ; average speed = 30 mph
C. time = 7 A.M. ; average speed = 45 mph
D. time = 7 A.M. ; average speed = 40 mph