Michael can complete a puzzle in 28 minutes. When his father helped him, they were able to complete the same puzzle in 17 minutes. How long would it take for his father to finish the puzzle on his own?

a

step-by-step explanation:

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this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of