The simple interest earned on a deposit of $4,000 at 5% for 120 days.

The simple interest formula is I = prt where I is the interest earned, p is the initial investment, r is the interest rate as a decimal, and t is time in years. We have a p of 4000, an r of. 05, and a t as 24/73 (120 days is equivalent to 24/73 year). Doing all that multiplying gives us a simple interest earned of $65.75