Solve.In a practice run, a race car driver's speed is clocked at 137.607 mph at the end of his first lap, and at 170.047 mph at the end of the next lap. How much faster was he driving at the end of the second lap?
A. 33.440 mph
B. 32.340 mph
C. 32.450 mph
D. 32.440 mph
Answer: D
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Solve the problem.Find the angle ? given x = 51, y = 16, ? = 60°.
A. 17.42° B. 42.58° C. 12.58° D. 120°
Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 25%, and C's to the next 42%. What is the bottom cutoff for a C grade? Round your answer to the nearest whole number.
A. 65 B. 68 C. 77 D. 63
The function f(x) changes value when x changes from x0 to x0 + dx. Find the approximation error 
. Round your answer, if appropriate.f(x) = x - x2, x0 = 2, dx = 0.06
A. 0.0036 B. 0.0396 C. 0.036 D. 0.072
Specify the center and radius of the circle.(x - 5)2 + (y - 2)2 = 10
A. center: (-5, -2); radius: 10
B. center: (5, 2); radius: 10
C. center: (5, 2); radius: 
D. center: (-5, -2); radius: 