50 points the heres the problem and all the questions that go with it

tarin received a raise of $80 per week. if he was making $500 per week before the raise, what is the percent change in his earnings?

1 using the information given, choose the best answer.

original amount =

6,585

6,000

6,570

6,540

2 final result:

the additional sales tax increased the price of the guitar by 9%, which is the sales tax rate.

the additional sales tax increased the price of the guitar by 9.5%, which is the sales tax rate.

the additional sales tax increased the price of the guitar by 9.75%, which is the sales tax rate.

the additional sales tax increased the price of the guitar by 9.25%, which is the sales tax rate.

3 using the information given, choose the best answer.

increase or decrease:

decrease

increase

4 substitution and solve =

5 amount of change =

555

570

540

585

6 percent =

x

9

9.5

9.25