Write an algebraic equation and use it to solve the problem.The manager of a coffee shop has one type of coffee that sells for $5 per pound and another type that sells for $12 per pound. The manager wishes to mix 100 pounds of the $12 coffee to get a mixture that will sell for $7 per pound. How many pounds of the $5 coffee should be used?
A. 350 pounds
B. 250 pounds
C. 125 pounds
D. 175 pounds
Answer: B
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Solve the problem.You have a choice of two accounts in which to invest your money for one year. Account A pays 
simple interest rate and account B pays 2.5% interest compounded monthly. Compute the effective annual yield of account B and determine which account has the better rate.
A. The rates are the same. B. There is not enough information to decide. C. Account A D. Account B
Sketch the graph and show all local extrema and inflection points.y = 
A. Min: (0,0)
No inflection point
B. Min: 
No inflection point
C. Min: (0,0)
Inflection points: 
, 
D. Min: 
No inflection point
Solve the problem.How many posts does it take to support a straight fence 140 feet long if posts are placed every 10 feet?
A. 13 B. 15 C. 16 D. 14
Solve the problem.There are five brands of a product on the market, three of which have very loyal customers who never change brands. The transition matrix for the five brands is shown below (where the brands are labeled A, B, C, D, and E). About how many times, on average, will a person currently using brand C or brand D use his or her current brand before trying one of the brands that have loyal followings? Round your answer to the nearest hundredth.ABCDE
A. 0.23 B. 1.40 C. 1.22 D. 2.62