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if $10000 is invested at an interest rate compounded annually the investment will grow to $P after x years where

P=10 000(1.08)^x

d) how long will it take for the ionvestment to grow $50 000 if the interest is 14% for the first 8 yrs and 10% thereafter?

e) find the annual interest rate necessary for the $10 000 to double in value in 5 yrs. (give ur answer as percentage)

Thankyu