Solve the exponential equation. Express the solution set in terms of natural logarithms.4x + 4 = 52x + 5
A. {ln 5 - ln 4}
B. 
C. 
D. {7 ln 5 - 5 ln 4}
Answer: B
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Solve.Punky went to dinner. Her bill was $22.60, and she left a 10% tip. How much was the tip, rounded to the nearest dollar?
A. $25 B. $5 C. $2 D. $45
Factor the expression completely, if possible.49x2 + 42x + 9
A. (7x + 3)2 B. (7x - 3)2 C. (7x + 3)(7x - 3) D. (49x + 9)(x + 1)
Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 7xy
B. 7xy
C. 3xy
D. 7xy
Solve the problem.The rate that a moving company charges depends on the distance, x, in miles that the articles are moved. Let C(x) represent the cost to perform a move of x miles. One firm charges as follows:
Where is C discontinuous?
A. x = 150 miles B. x = 150 miles and x = 250 miles C. C is continuous at all points in its domain. D. x = 250 miles