State whether the given relation is a function.Consider a relation whose domain is all students attending the University of Ohio and whose range values are a set of each students' teachers. Is this relation a function?
A. Yes
B. No
Answer: B
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Solve for x using an equivalent exponential expression.The discus is thrown from a circular region 8 feet 4 inches in diameter. What is the area of the circle (in square inches)? Use 3.14 for ?. Round to the nearest tenth, if necessary.
A. 3,925.0 sq in. B. 7,850.0 sq in. C. 31,400.0 sq in. D. 314.0 sq in.
Use the formulas relating distance, rate, and time.A flight departs at 8:30 A.M. EST and arrives at its destination at 11:00 A.M. PST. If the plane flies at an average rate of 
mph, what distance does it travel? Round to the nearest whole number if necessary.
A. 1,622 miles B. 2,342 miles C. 1,982 miles D. 901 miles
Find the center, foci, and vertices of the ellipse.49x2 + 25y2 = 1225
A. center at (0, 0)
foci at (- 2
, 0) and (2
, 0)
vertices at (-7, 0), (7, 0)
B. center at (0, 0)
foci at (0, -7) and (0, 7)
vertices at (0, -49), (0, 49)
C. center at (0, 0)
foci at (0, 7) and (5, 0)
vertices at (0, 49) and (25, 0)
D. center at (0, 0)
foci at (0, - 2
) and (0, 2
)
vertices at (0, -7), (0, 7)
Solve the problem.Suppose the demand for a certain item is given by 
, where p represents the price of the item. Find D'(p), the rate of change of demand with respect to price.
A. D'(p) = -8p2 + 7 B. D'(p) = -4p + 7 C. D'(p) = -4p2 + 7 D. D'(p) = -8p + 7