Which situation could be described by the expression d+1/2 A. Lela walked d miles yesterday, and 1/2 mile today.
B. Lela walked d miles yesterday, and 1/2 miles fewer today.
C. Lela walked 1/2 mile yesterday, and d miles fewer today.
D. Lela walked1/2 mile yesterday, and d times as far today.

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