Solve the problem.After 7 years, the balance, A, in an account with principal P and interest rate r compounded annually is given by the formula 
Use factoring by grouping to simplify this formula.
A. A = (P + Pr)(1 + r)6
B. A = P(1 + r)7
C. A = P(1 + r)7r
D. A = P(1 + Pr)(1 + r)6
Answer: B
Mathematics
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