Solve.A pendulum bob swings through an arc 80 inches long on its first swing. Each swing thereafter, it swings only 66% as far as on the previous swing. What is the length of the arc after 9 swings? Round your answer to two decimal places, if necessary.
A. 422.4 inches
B. 1.9 inches
C. 1.25 inches
D. 2.88 inches
Answer: D
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Determine an appropriate viewing window for the given function and use it to display its graph.y = 4 
A. 
B. 
C. 
D. 
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
During which two hour period did the temperature increase the most?
A. 9 a.m. to 11 a.m. B. 12 p.m. to 2 p.m. C. 10 a.m. to 12 p.m. D. 10 a.m. to 11 a.m.
250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.Assuming there were no outliers, the lowest score on the exam was around
A. 0. B. 10. C. 75. D. 45. E. none of these
Solve the problem.The radius of a ball is claimed to be 4.5 inches, with a possible error of 0.05 inch. Use differentials to approximate the maximum possible error in calculating the volume of the sphere and the surface area of the sphere.
A. 1.8? in.3; 4.05? in.2 B. 0.9? in.3; 18? in.2 C. 4.05? in.3; 1.8? in.2 D. 8.1? in.3; 3.6? in.2