Solve the equation.r(r - 18) = -81
A. {9, -9}
B. {81, 9}
C. {-9}
D. {9}
Answer: D
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A medical insurance policy requires Ana to pay the first $100 of her hospital expense. The insurance company will then pay 70% of the remaining expense. Ana is expecting a short surgical stay in the hospital, for which she estimates the total bill to be about $3,900. How much will Ana's portion of the bill amount to?
A. $980 B. $1120 C. $1240 D. $1680 E. $2010
The graph shows the depth of water W in a reservoir over a one-year period as a function of the number of days x since the beginning of the year. What was the average rate of change of W between x = 0 and x= 100?
 figure 1.png)
Rewrite as a terminating decimal.
A. 0.24 B. 0.12 C. 0.38 D. 0.32
Convert the area as indicated.20 square feet to square inches
A. 240 in2 B. 1.6667 in2 C. 480 in2 D. 2880 in2