Sam Smith promised his nephew Joey that he would give him $7,700 five years from today for graduating high school. Assume money is worth 8% interest compounded semiannually. What is the present value of this $7,700? Round your answer to the nearest cent.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola 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? write your answer as a decimal rounded to the nearest tenth