The late fee for library books is $2.00 plus 15 cents each day for a book that is late. How much will you owe if the book is 30 days late?

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas