Simplify by finding the absolute value.
A. 0
B. 7
C. 14
D. -7
Answer: B
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A company installs 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last the indicated amount of time.Between 290 hours and 540 hours
A. 1,641 B. 1,639 C. 3,185 D. 3,190
Solve the problem.The polynomial function 
represents the yearly income (or loss) from a real estate investment, where t is time in years. After how many years does income begin to decline?
A. 6 yr B. 9.33 yr C. 7 yr D. 14 yr
Solve the problem.If f varies jointly as q2 and h, and 
when 
and 
, find f when 
and 
.
A. 48 B. 96 C. 24 D. 6
Solve the inequality and graph the solution set on a number line.
? -7
A. [-35, ?)
B. (-?, -35]
C. (-?, -35)
D. (-35, ?)