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

Mathematics

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Evaluate the integral.

A.  + C
B.  + C
C.  + C
D.  + C

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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

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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

Mathematics

Find the sum, if it exists.-7 -  -  -  + . . .

A. - 63 B. - 70 C. 70 D. Does not exist

Mathematics