Find the center and radius of the circle.y2 = 81 - (x - 4)2
A. Center: (0, -4); radius: 9
B. Center: (-4, 0); radius: 81
C. Center: (0, 4); radius: 81
D. Center: (4, 0); radius: 9
Answer: D
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Solve the problem.Two cars leave an intersection. One car travels north; the other east. When the car traveling north had gone 6 miles, the distance between the cars was 2 miles more than the distance traveled by the car heading east. How far had the eastbound car traveled?
A. 12 miles B. 8 miles C. 10 miles D. 6 miles
Find an equation of variation in which the following are true.y varies jointly as x and z; y = 360 when x = 12 and z = 24
A. y = 
B. y = 
C. y = 
xz
D. y = 103680xz
Solve the percent of change problem.In a local election, 32,600 people voted. This was a decrease of 7% over the last election. How many people voted in the last election? Round to the nearest whole number when necessary.
A. 30,467 people B. 34,882 people C. 35,054 people D. 30,318 people
Find the set of possible rational zeros given the function.f(x) = 3x3 + 37x2 + 37x + 27
A. 
B. {±1, ±3, ±9, ±27}
C. 
D. {±1, ±3, ±6, ±9, ±27}