Stacy owns a collection of dolls from the 19th century, currently valued at $67,000. The value increases by 12.5% annually. Which function represents the value of the doll collection after t years.

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