Tell which brand is the better buy.Brand A 12 oz for $3.72Brand B 16 oz for $5.12
A. Equal value
B. Brand A
C. Not enough information
D. Brand B
Answer: B
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Use the change-of-base formula to find the logarithm. Round your answer to four decimal places. log5 0.664
A. -0.1778 B. -3.9305 C. 7.5301 D. -0.2544
Give an appropriate answer.Using the following graph, find an Euler circuit that begins and ends with vertex A.
A. No Euler circuit exists. B. A ? D ?B ? A ? C ? E ? D ? C ? A C. A ? B ? D ? C ? E ? D ? A D. A ? B ? D ? E ? C ? A
Find the foci of the ellipse.16x2 - 96x + 25y2 - 150y - 31 = 0
A. (-1, 3), (7, 3) B. (0, 3), (6, 3) C. (3, -1), (3, 7) D. (-2, 3), (8, 3)
Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 28 watches B. 30 watches C. 57 watches D. 31 watches