Solve the problem.The life span of a certain insect in days is uniformly distributed over the interval 
What is the expected life of this insect?
A. 28 days
B. 29 days
C. 30 days
D. 26 days
Answer: A
Mathematics
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Determine whether the graph of the equation or function has symmetry about the x-axis, the y-axis, and the origin.f(x) = -6x3 + 3x
A. x-axis B. Origin C. x-axis, y-axis D. x-axis, origin
Mathematics
Solve the formula for the specified variable.M = ?r2hd for r
A. r = ±
B. r = ±
C. r = ±
D. r = ± 
Mathematics
Solve the right triangle shown in the figure. 
?A = 30°, 
= 12 m, ?C = 90°
A. ?B = 60°, 
= 6
m, 
= 24 m
B. ?B = 60°, 
= 24 m, 
= 6
m
C. ?B = 60°, 
= 24 m, 
= 12
m
D. ?B = 60°, 
= 4
m, 
= 8
m
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.
A. 6
B. 29
C. 4
D. 9
Mathematics