Find the domain of the rational expression.
A. {x|x is a real number and x ? 7}
B. {x|x is a real number}
C. {x|x is a real number and x ? 3}
D. {x|x is a real number and x ? 3 and x ? 7}
Answer: B
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Evaluate the integral.
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
A ball is tossed upward and then falls to the ground. Its height after t seconds is given by the function 
. During the period the rock is falling, what can be said about 
?
?
A. is positive.
B. is negative.
C. is zero.
D. None of the above
Determine whether the variation between the indicated quantities is direct or inverse.The acceleration of a jet-powered dragster and its posted elapsed time for the quarter mile. (Assume the driver is able to keep the dragster on a straight path.)
A. Inverse B. Direct
Find the sum, if it exists.-7 - 
- 
- 
+ . . .
A. - 63 B. - 70 C. 70 D. Does not exist