Determine the standard form of the equation for the circle with center (h, k) and radius r. (h, k)=(-1/5,1/3) r=1/2

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?