In 9 through 16, estimate each sum or difference by replacing
each fraction with 0, , or 1.
9. 1/2 + 1/3 10. 1/2 + 2 5 7 11. 1 3 - 1 / 6 5
12. ? + 8-17
13. 1 - 7 3 1
14. 3 - 7
15. 78-17
16. & 2 + 2/3
00

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?