1. **State the problem:** We want to find the present deposit amount $P$ that will grow to $150,000$ in 11 years with quarterly compounding at an APR of 5.62%.
2. **Formula used:** The future value $A$ with compound interest is given by:
$$A = P \left(1 + \frac{r}{n}\right)^{nt}$$
where:
- $A$ is the amount after time $t$,
- $P$ is the principal (initial deposit),
- $r$ is the annual interest rate (decimal),
- $n$ is the number of compounding periods per year,
- $t$ is the number of years.
3. **Given values:**
- $A = 150000$
- $r = 0.0562$
- $n = 4$ (quarterly compounding)
- $t = 11$
4. **Rearrange formula to solve for $P$:**
$$P = \frac{A}{\left(1 + \frac{r}{n}\right)^{nt}}$$
5. **Substitute values:**
$$P = \frac{150000}{\left(1 + \frac{0.0562}{4}\right)^{4 \times 11}} = \frac{150000}{\left(1 + 0.01405\right)^{44}} = \frac{150000}{(1.01405)^{44}}$$
6. **Calculate the denominator:**
$$(1.01405)^{44} \approx 1.747422$$
7. **Calculate $P$:**
$$P = \frac{150000}{1.747422} \approx 85837.68$$
**Final answer:**
$85837.68$ should be deposited today to have $150,000$ in 11 years with quarterly compounding at 5.62% APR.
College Fund 79351E
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