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Compound Interest II Money, where fashion continues

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Principal, not Principle Principal is the vocabulary for beginning balance, not Principle.

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Review Problem $5000 is deposited in a bank at an annual interest rate of 6%. Find the balance after 7 years if the interest is: Simple interest 5000(1+0.06x7) = $7100 Compounded Monthly 5000(1+0.06/12) 12x7 = $7601.85 Compounded Continuously 5000e 0.06x7 = $7609.81

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Solving for Principal Your family needs $15000 for your younger brother’s college tuition in 6 years. If the bank offers an annual interest rate of 8%, compounded quarterly, find the principal your family needs to invest now.

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Solving for time You won a lottery of $100,000 and decided to deposit it into a bank account. If the bank offers 7% continuously compounded interest, how long does it take for you to become a millionaire?

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Solving for Interest Rate Christian Dior LE 30 handbag costs $4800. You have $3000 now and want to purchase this handbag in 6 years. At what interest rate, compounded semiannually, must you get in order to place this purchase?

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Compound Interest If a bank pays an annual interest of 6%, compounded monthly, how many years does it take to double the balance?

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Other Applications The population of a certain type of bacteria increases at time t hours is given by the exponential function n(t) = 20e 0.05t. What is the initial amount of bacteria? n(0) = 20e 0 = 20 Find the population of the bacteria after 60 hours. n(60) = 20e 0.05x60 = 402 When does the population reach 1000? n(t) = 20e 0.05t = 1000, t = 78.240 hours

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Carb, where fashion gets grounded Fin…

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Simple Interest 6.7. Simple Interest The money earned on a savings account or an investment. It can also be money you par for borrowing money.

Simple Interest 6.7. Simple Interest The money earned on a savings account or an investment. It can also be money you par for borrowing money.

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