Solve the equation.log6 (7x + 3) = log6 (7x + 2)
A. 
B. 0
C. 5
D. No solution
Answer: D
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Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. 1
Solve the equation.18(2x - 6) = 6(6x + 5)
A. {all real numbers} B. {0} C. {138} D. ?
Solve the problem.A boat traveled for 3 hr with a 7-mph current to reach a picnic area. The return trip against the same current took 6 hr. Find the speed of the boat in still water.
A. 49 mph B. 28 mph C. 21 mph D. 84 mph
Solve the problem.A steel can in the shape of a right circular cylinder must be designed to hold 400 cubic centimeters of juice (see figure). It can be shown that the total surface area of the can (including the ends) is given by S(r) = 2?r2 + 
, where r is the radius of the can in centimeters. Using the TABLE feature of a graphing utility, find the radius that minimizes the surface area (and thus the cost) of the can. Round to the nearest tenth of a centimeter. 
A. 4 cm B. 3.2 cm C. 5.2 cm D. 0 cm