Solve the problem.The formula 
can be used to estimate the maximum safe velocity v, in miles per hour, at which a car can travel along a curved road with a radius of curvature r, in feet. To the nearest whole number, find the radius of curvature if the maximum safe velocity is 20 miles per hour.
A. 160 ft
B. 400 ft
C. 1000 ft
D. 64 ft
Answer: A
Mathematics
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Find the interval of convergence of the series.
A. 7 < x < 9 B. x < 12 C. 4 < x < 12 D. -12 < x < 12
Mathematics
Solve by trial.x + 0 = 8
A. 0 B. 8 C. 10 D. 7
Mathematics
Use the root test to determine if the series converges or diverges.
A. Converges B. Diverges
Mathematics
Graph the function.f(x) = 3 
A. 
B. 
C. 
D. 
Mathematics