Joe rewrote the following function. Were they correct in their answer. Explain why or why not.
S (t) = 75 - (0.2)'
Sh(t) = 4500 • (0.2)

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?