Ineed with this. i’m feeling very uncomfortable with the answers. so, can someone explain to me the correct steps if one of them are wrong?

19 is correct

20. The total sale is
.. total = (book price) + (tax rate)*(book price) . . . . math for adding tax
.. total = (book price)*(1 +(tax rate)) . . . . . . . . . . . . . factor out book price
.. total/(book price) = 1 +(tax rate) . . . . . . . . . . . . . . divide by book price
.. (total/(book price)) -1 = tax rate . . . . . . . . . . . . . . subtract 1

25.02/24 -1 = tax rate = 1.0425 -1 = .0425 = 4.25%

Number 5 is 50 degreesnumber 6 is 45 degreesnumber 7 is 60 degreesnumber 8 is 45 degrees