Find the domain of f. Write your answer in interval notation.f(x) = 
A. (-?, -4)
B. [4, ?)
C. (-?, 4)
D. [-4, ?)
Answer: D
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Solve the problem.A poll of 1700 people indicated that 3 out of 5 people were planning on voting in the next election. Of the people who intend to vote 11 out of 20 will vote for the Republican candidate. How many people in the poll will vote for the Republican candidate?
A. 935 people B. 1020 people C. 561 people D. 459 people
Solve the Problems.
A computer technician travels 210 on a service call. He averaged 40 miles per hour for part of the trip and averaged 50 mph for the rest of the trip. If the total trip took five hours how long did he travel at a rate of 50 miles per hour?
Rewrite the expression with a rational exponent. 
A. x11/9
B. 
C. x9/11
D. x2
Solve the problem.A product sells by word of mouth. The company that produces the product has noticed that revenue from sales is given by 
where x is the number of units produced and sold. If the revenue keeps changing at a rate of 
per month, how fast is the rate of sales changing when 1800 units have been made and sold? (Round to the nearest dollar per month.)
A. $339,411/month B. $12/month C. $21,213/month D. $10,607/month