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.Less than 690 hours
A. 4,855
B. 4,853
C. 4,860
D. 2,357
Answer: A
Mathematics
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The bar graph below shows the number of students by major in the College of Arts and Sciences. Answer the question.
Which major was the choice of nearly 
of the students?
A. Math B. History C. English D. Science
Mathematics
Solve the problem.Prove that 
dt = 
dt + 
dt
What will be an ideal response?
Mathematics
Solve the problem.Suppose a life insurance policy costs $28 for the first unit of coverage and then $7 for each additional unit of coverage. Let C(x) be the cost for insurance of x units of coverage. What will 10 units of coverage cost?
A. $98 B. $70 C. $42 D. $91
Mathematics
Look for a pattern and then predict the general term, or nth term, an, of the sequence.2, 
, 
, 
, 
, . . .
A. an = 
B. an = 
C. an = 
D. an = 
Mathematics