Iris has an investment worth $8,813. She made her only deposit in it seven years ago. Given that the investment yields 3.7% simple interest annually, how big was the initial deposit?

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