Multi step equations plz me with the problems in the picture

Frank has $66.50 in his account on sunday. over the next week, he makes the following changes to his balance via deposits and purchases: day debit ($) credit ($) monday 60.33 80.75 tuesday 54.45 wednesday 49.20 15.00 thursday 35.40 friday 16.85 75.00 saturday 80.56 on what day does frank first get charged an overdraft fee? a. wednesday b. thursday c. friday d. saturday select the best answer from the choices provided a b c d

What percent of 18 is 24? and plz explain thx.

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6