Solve the problem.The current I in an electrical conductor is inversely proportional to the resistance R of the conductor. The current is 5 amperes when the resistance is 859 ohms. What is the current when the resistance is 531 ohms? Round to the nearest tenth.
A. 3.1 amperes
B. 0.32 amperes
C. 0.12 amperes
D. 8.1 amperes
Answer: D
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Solve the problem. Round to the nearest tenth if necessary.Last year, Maria earned $349 per week. This year, her salary increased to 
per week. What is the percent of increase?
A.
| 92.3% |
B.
| 7.2% |
C. 7.7%
D.
| 92.8% |
Find an equation of the circle satisfying the given conditions.Center at (-9, -7), radius 
A. (x - 7)2 + (y - 9)2 = 289 B. (x + 7)2 + (y + 9)2 = 289 C. (x - 9)2 + (y - 7)2 = 17 D. (x + 9)2 + (y + 7)2 = 17
Solve the problem.Bob finds that the cost of driving his truck is 57 cents per mile. Give a numerical representation, in the form of a table, for a function f that computes the cost in dollars of driving x miles. Let 
A. 
.
B. 
.
C. 
.
D. 
.
Events E and F are mutually exclusive and Pr(F) ? 0. Which of the following must be true?
A. E and F are independent. B. Pr(E ? F) = Pr(E) ? Pr(F) C. Pr(E ? F) = Pr(E) + Pr(F) D. Pr(E|F) = Pr(E) E. none of these