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Question
select the correct answer from each drop - down menu.
jerry invested $300 in a bank that pays 5 percent interest compounded annually. the amount of money he has at the end of each year is modeled by the function ( j(t)=300(1.05)^{t} ). his sister rachel invested the same initial amount of money into a different bank that paid her 5.5 percent simple interest. the amount she gets at the end of each year is shown in the table.
| year | amount (dollars) |
|---|---|
| 1 | 316.50 |
| 2 | 333.00 |
| 3 | 349.50 |
| 4 | 366.00 |
| 5 | 382.50 |
the average rate of growth for jerry’s investment from when he first put money in the bank to the end of the third year is $ drop - down per year.
the average rate of growth for rachel’s investment from when she first put money in the bank to the end of the third year is $ drop - down per year.
Step1: Find Jerry's final amount at year 3
$J(3) = 300(1.05)^3 = 300 \times 1.157625 = 347.2875$
Step2: Calculate Jerry's average growth rate
$\text{Average Rate} = \frac{347.2875 - 300}{3-0} = \frac{47.2875}{3} = 15.7625$
Step3: Find Rachel's final amount at year3
Rachel's year 3 amount = $349.50$
Step4: Calculate Rachel's average growth rate
$\text{Average Rate} = \frac{349.50 - 300}{3-0} = \frac{49.50}{3} = 16.50$
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Jerry's average growth rate is $\boldsymbol{15.76}$ per year, Rachel's average growth rate is $\boldsymbol{16.50}$ per year.