Find the domain and range of the relation.{(8,4), (-8,5), (2,2), (2,-5)}
A. D = {8, 2, -8}; R = {4, 2, 5, -5}
B. D = {8, 2, -8, -2}; R = {4, 2, 5, -5}
C. D = {4, 2, 5, -5}; R = {8, 2, -8}
D. D = {8, 2, -8, 2}; R = {4, 2, 5, -5}
Answer: A
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City water, which is slightly chlorinated, is being used to flush a tank of heavily chlorinated water. The concentration C, in milligrams per gallon, of chlorine in the tank 
hours after flushing begins is given by
?
.
The water in the tank is safe for use when chlorine levels are less than 2.50 milligrams per gallon. For what values of t is the water in the tank safe for use? Round your answer to two decimal places.
?
A. 
hours
B. 
hours
C. 
hours
D. 
hours
Determine if the geometric series converges or diverges. If it converges, find its sum.
+ 
2 + 
3 + 
4 + 
5 + . . .
A. diverges
B. converges, 
C. converges, 
D. converges, 
Find the matrix product, if possible.
A. 
B. 
C. 
D. Does not exist
Calculate.
× 15.71
A. 11.775 B. 13.74625 C. 11.7825 D. 12.568