Given the interest formula, I = r ? p ? t, solve the exercise for the unknown value. If necessary, round to the nearest cent, percent, or year.r = 7.8%, I = $319, t = 
year, p =
A. $16,358.97
B. $12,269.23
C. $4089.74
D. $1022.44
Answer: A
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Solve the problem.
Southwest Dry Cleaners believes that it will need new equipment in 7 years. The equipment will cost $26,000. What lump sum should be invested today at 5% compounded semiannually, to yield $26,000?
A. $18,400.91 B. $23,680.18 C. $21,837.73 D. $21,974.26
Solve the inequality. Graph the results.-2 < 
A. 
B. 
C. 
D. 
Solve the problem.30 marbles are to be divided into three bags so that the second bag has three times as many marbles as the first bag and the third bag has twice as many as the first bag. If x is the number of marbles in the first bag, find the number of marbles in each bag.
A. 1st bag = 6 marbles; 2nd bag = 14 marbles; 3rd bag = 10 marbles B. 1st bag = 6 marbles; 2nd bag = 18 marbles; 3rd bag = 12 marbles C. 1st bag = 5 marbles; 2nd bag = 10 marbles; 3rd bag = 15 marbles D. 1st bag = 5 marbles; 2nd bag = 15 marbles; 3rd bag = 10 marbles
Solve.
A. 
B. 
C. 
D. 
E. no real solution