Solve the problem.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by 
What is the cost per ton for x = 50? Round your answer to the nearest hundredth, if necessary.
A. $462.96
B. $10.00
C. $5625.00
D. $6250.00
Answer: A
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Solve the equation.log8(5x + 5) = log8(5x + 8)
A. {3}
B. {0}
C. 
D. ?
Solve the problem.When you buy an item on which sales tax is charged, the total cost is calculated by the formula: 
where T is the total cost, P is the item's price, and S is the sales tax rate (as a percent). If you pay $14.77 for an item priced at $14, what was the tax rate?
A. 6.5% B. 5.5% C. 2.75% D. 7.5%
Assume you have a digraph with 5 vertices (A, B, C, D, and E) and 9 arcs. A is incident from C, D, and E; B is incident to D and E and incident from C; D is incident to C and incident from E.How many cycles are there in the digraph that start and end at A?
A. 0 B. 3 C. 2 D. 1 E. none of these
Find the volume of the solid bounded above by the surface 
and below by the plane region R.
?
and R is the region bounded by the graphs of 
.
?
A. 
B. ?
C. ?
D. ?
E. ?