Kristen does 215 jumping jacks in 4 minutes. About how many jumping jacks does she do in 1 minute? ​

What is the y intercept of f(x)=(1/2)^x?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.