The principal P is borrowed and the loans future value A at time t is given. Determine the loans simple interest rate r.

P= $5000.00 A= $5400.00 t= 1year

We can use the simple interest formula:

A = P + Prt

Where:
A = future value of the loan
P = principal borrowed
r = interest rate
t = time in years

Plugging in the given values:

5400 = 5000 + 5000 * r * 1

Simplifying the equation:

5400 - 5000 = 5000r

400 = 5000r

Dividing both sides by 5000:

r = 400/5000

r ≈ 0.08 or 8%

Therefore, the loan's simple interest rate is 8%.