Archive · With Solution

Daily Challenge — September 30, 2026

time value of money · mixed

Pinnacle Industrial Group deposits $850,000 into a high-yield corporate bond fund with a stated annual rate of 7.35%, compounded quarterly for 8 years. However, after 4 years, the company makes an additional deposit of $325,000 into the same fund at the same rate and term. Calculate the total future value of both deposits combined and the total interest earned.

Correct Answers

future_value

null

interest_earned

null

Step-by-Step Solution

Compound Interest Formula: FV = P × (1 + r/m)^(m×t)
  Principal (P):         $850,000.00
  Annual Rate:           7.35%
  Compounding:           quarterly (m = 4)
  Total periods (n):     undefined
  Rate per period (r/m): 1.8375%

  FV = $850,000.00 × (1 + 1.8375%)^undefined
  FV = $850,000.00 × NaN
  FV = $NaN

  Interest Earned = FV − Principal = $NaN − $850,000.00 = $NaN