Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.

A.
B.
C.
D.


Answer: C

Mathematics

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Use implicit differentiation to find the specified derivative at the given point.Find  at the point (9, 1, -1) for ln  - exy+z2 = 0.

A.
B.
C.
D.

Mathematics

Solve the problem.The value, in dollars, of a copy machine is given by the function  where x is the number of years that have passed since the machine was purchased. Interpret the slope of the graph of f as a rate of change.

A. The copy machine increases in value by $210 each year. B. The copy machine increases in value by $420 each year. C. The copy machine decreases in value by $210 each year. D. The copy machine decreases in value by $420 each year.

Mathematics

Solve. -  = 0

A.
B.
C.
D.

Mathematics

Solve.In how many ways can 8 people line up for play tickets?

A. 8 B. 40,320 C. 16,777,216 D. 1

Mathematics