2. (a) Find the area of this triangle. 12 cm

9 cm
(b) Suppose the base is doubled. Explain what happens to the original area.

(c) Suppose both the height and the base of the original triangle are doubled.
Explain what happens to the original area.

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?