Solve.Joan can mow a 4-acre field in 2 hr. How long would it take her to mow a 3.6-acre field?
A. 3.8 hr
B. 1.8 hr
C. 0.9 hr
D. 4.8 hr
Answer: B
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Rewrite the inequality using interval notation. Then graph the inequality.x ? 4 or x ? 5
A. (4, 5)
B. (-?, 4] ? [5, ?)
C. (-4, 5)
D. [-5, -4]
Solve the problem.The cost, in millions of dollars, for a company to manufacture x thousand automobiles is given by the function 
Find the number of automobiles that must be produced to minimize cost.
A. 45 thousand automobiles B. 3 thousand automobiles C. 9 thousand automobiles D. 6 thousand automobiles
Solve the problem.On the September 20 billing date, Emilio had a balance due of $573.56 on his credit card. During the next month, Emilio charged an additional $357.87 and makes a payment of $433. The interest rate on the card is 1.9% per month. Using the previous balance method, find the finance charge on October 20.
A. $6.80 B. $9.47 C. $2.67 D. $10.90
Decide whether or not the functions are inverses of each other.f(x) = 2x + 4, g(x) = 
x - 2
A. Yes B. No