An object is fired straight up with a velocity of 32 ft./s. The height (h) reached by the object at (t) seconds is given by h(t) = -8t + 32t. When does the object hit the ground? A. 8 seconds
B. 4 seconds
C. 6 seconds
D. 2 seconds

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Factor the polynomial by its greatest common monomial factor.

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