wyatt opend a savings account 4 years ago. the account earns 4%interest compounded quarterly if the current balance is $1,000.00 how much did he deposit initially round your answer to the nearest cent ​

Respuesta :

Answer:

He deposited initially $852.82

Step-by-step explanation:

The rule of the compound interest is [tex]A=P(1+\frac{r}{n})^{nt}[/tex], where

  • A is the new amount
  • P is the initial amount
  • r is the rate in decimal
  • n is the period of the time
  • t is the time

∵ Wyatt opened a savings account 4 years ago

t = 4

∵ The account earns 4% interest compounded quarterly

r = 4% = 4 ÷ 100 = 0.04

n = 4 ⇒ compounded quarterly

∵ The current balance is $1,000.00

A = 1,000

→ Substitute these values in the rule above to find P

∵ 1,000 = [tex]P(1+\frac{0.04}{4})^{4(4)}[/tex]

∴ 1,000 = [tex]P(1+0.01)^{16}[/tex]

∴ 1,000 = [tex]P(1.01)^{16}[/tex]

→ Divide both sides by  [tex](1.01)^{16}[/tex]

∴ 852.8212622 = P

→ Round it to the nearest cent (2d.p)

P = 852.82

He deposited initially $852.82