Solve the problem.The phone company needs to install a line from point A on shore to an island that is 9 miles away from point B, as shown in the drawing. The cost associated with underwater cable is $18,600 per mile, while the cost associated with cable used over land is $9000 per mile. To the nearest hundred dollars, what is the minimum cost for which this project can be completed?9 miles
?10 miles
A. $237,300
B. $233,100
C. $235,300
D. $236,500
Answer: D
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Solve the proportion for x.
= 
A. x = 
B. x = 
C. x = 
D. x = 
Solve the problem.Sue drove her car 253 miles in January, 277 miles in February, and 280 miles in March. If her average mileage for the four months from January to April is to be at least 284 miles, how many miles must she drive in April?
A. at most 284 miles B. at least 274 miles C. at least 326 miles D. at most 326 miles
Graph the sinusoidal function using key points.y = -2 sin
- 2
A. 
B. 
C. 
D. 
Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 7x5 - 3x4 + 7x3 - 2
A. 1 or 3 positive; 0 negative B. 1 or 3 positive; 1 or 3 negative C. 1 positive; 1 or 3 negative D. 0, 2, or 4 positive; 0 negative