Which characteristics can you readily identify from f(x)=(x-3)^2+9 Whether the function has a min or a max

Axis of symmetry

Vertex

The x- intercepts

Choose all that apply

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?