Cummings Riley
12/19/2023 · Middle School
\(Mario wants to open a new clothing shop in Pretoria CBD. He estimates that he will have R250 000 available on 16 June 2022 from an investment made on 7 September 2021, earning 7,65\% interest per year, compounded on the first of each month. If fractional compounding is used for the whole period, then the amount Mario deposited on the 7 September 2021 was \)
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Respuesta verificada por el tutor
Respuesta rápida
R232,000.00
Solución paso a paso
Step 1: Determine the total number of months from 7 September 2021 to 16 June 2022. This is 9 months and 9 days, which can be approximated as 9.3 months.
Step 2: Use the formula for compound interest: A = P(1 + r/n)^(nt), where:
- A = the amount of money accumulated after n months (R250,000)
- P = the principal amount (the initial deposit)
- r = annual interest rate (7.65% or 0.0765)
- n = number of times interest is compounded per year (12 for monthly)
- t = time in years (9.3/12)
Step 3: Rearrange the formula to solve for P: P = A / (1 + r/n)^(nt).
Step 4: Substitute the values into the formula:
- A = 250,000
- r = 0.0765
- n = 12
- t = 9.3/12
Step 5: Calculate the value of (1 + r/n)^(nt):
- r/n = 0.0765/12 = 0.006375
- nt = 12 * (9.3/12) = 9.3
- (1 + 0.006375)^(9.3) ≈ 1.0601
Step 6: Calculate P:
P = 250,000 / 1.0601 ≈ 235,000.
Step 7: Round to the nearest whole number if necessary.
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