Write an equation to find the amount of simple interest, earned on a 600 dollar investment after 9 months, of the interest rate is 2.5%

Equation:
A = P(1 + rt)
How to do it:
First, converting R percent to r a decimal
r = R/100 = 2.5%/100 = 0.025 per year,
putting time into years for simplicity,
9 months ÷ 12 months/year = 0.75 years,
then, solving our equation
A = 600(1 + (0.025 × 0.75)) = ___
What is it?

It creates dogx^2 and then flip your answer and multiply by 2