Find the variance of the probability density function to the nearest hundredth.f(x) = 
; [2, 8]
A. 2.98
B. 2.75
C. 3.00
D. 2.86
Answer: C
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Find the limit.
tan x
A. 0 B. ? C. 1 D. -?
Solve.A ladder that is 15 feet long is 9 feet from the base of a wall. How far up the wall does the ladder reach?
A. 12 ft
B. 
ft
C. 144 ft
D. 3
ft
Find the missing quantities. If there is no operating loss or absolute loss, write "none."
A. Breakeven point = $53 Operating loss = $44 Absolute loss = $9 B. Breakeven point = $44 Operating loss = none Absolute loss = none C. Breakeven point = $20 Operating loss = none Absolute loss = $9 D. Breakeven point = $44 Operating loss = $9 Absolute loss = $53
Solve the problem.Suppose that the manufacturing cost of a precision instrument is approximated by 
where x is the cost of materials and y is the cost of labor. Find 
A. 111 B. 194 C. 82 D. 376