Solve the application problem.A recent advertisement claimed that 2 out of every 7 doctors recommend a certain herbal supplement to increase energy levels. If a local hospital employs 280 doctors, how many doctors would you expect to recommend the supplement? (Round to the nearest whole number, if necessary.)
A. 80 doctors
B. 980 doctors
C. 3920 doctors
D. 40 doctors
Answer: A
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Solve.Mike works on commission selling electronic equipment. The linear function 
describes his annual income I when his total sales for the year are s. At what level of sales will Mike's income be $42,900?
A. $437,000 B. $45,000 C. $4,500,000 D. $450,000
Convert the fraction to a decimal. If a division does not come out evenly, round the answer to the nearest thousandth.
A. 0.757 B. 0.076 C. 7.57 D. 1.321
Solve.A dairy produces 
of milk each day. There are 
in a gallon. How many gallons of milk are produced each day?
A. 13,250 gal. B. 1,325,000 gal. C. 2,120,000 gal. D. 132,500 gal.
Determine the integral by making an appropriate substitution.
A. 
t3(8 + t3)4/5 + C
B. 
(8 + t3)4/5 + C
C. 
(8 + t3)4/5 + C
D. 
+ C