Acircular backyard pool has a diameter of 20 feet and is 5 feet deep. one cubic foot of water has a capacity of approximately 7.48 gallons. if water costs $2 per thousand gallons, how much will it cost to fill the pool ?

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