Karif plans to use a 20% off coupon on a $27.60 purchase

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Need so much on this one how many yards?

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