The soap bubble I am blowing has a radius that is growing at a rate of 3 cm/s. How fast is the surface area growing when the radius is 10 cm? (The surface area of a sphere of radius r is 
.)
?
A. 
B. 
C. 
D. 
E. 
Answer: C
Mathematics
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Answer the question.Supply and demand equations are given by
where y represents price in dollars and x represents the number of items in supply. The market equilibrium is the solution to this system. At market equilibrium, is the supply 12 items and the price $1440?
A. Yes B. No C. Cannot be determined
Mathematics
Compare using <, >, or =.9 m 
95 cm
A. > B. = C. <
Mathematics
Solve the problem.What is the y-intercept of y = cot x?
A. 0
B. 1
C. 
D. none
Mathematics
Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a5 when a1 = 9, r = 5.
A. 180 B. 625 C. 5625 D. 28,125
Mathematics