A study found that 61% of green turtles migrate to warmer climates when seasons change. Scientists tagged 120 green turtles before migration. What is the probability that less than 20 green turtles did not migrate to a warmer climate during the season change? state the mean, variance, and standard deviation.

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