Solve the problem.The surface area S of a sphere with radius r is given by the formula 
If a sphere has surface area 
square inches, what is its radius?
A. 8 in.
B. 8? in.
C. 64 in.
D. 16 in.
Answer: A
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Graph the system of inequalities. Indicate the solution by shading.2x + 3y ? 6 x - y ? 3 x ? 1
A. 
B. 
C. 
D. 
Find the quadrant that contains the terminal side of angle ?.cos ? < 0 and csc ? < 0
A. I B. II C. III D. IV
Water flows from a tank of constant cross-sectional area 50 
through an orifice of constant cross-sectional area 1/4 located at the bottom of the tank. Initially, the height of the water in the tank was 20 ft, and t sec later it was given by the equation 
. How fast was the height of the water decreasing when its height was 2 ft?
a. 
ft/sec
b. 2/25 ft/sec
c. 
ft/sec
Solve the problem.In a survey about the number of siblings of college students, the following probability table was constructed: 
What is the probability that a student 3 or more siblings?
A. 0.75 B. 0.13 C. 0.25 D. 0.12