Use the fact that the length of an arc intercepted by an angle is proportional to the radius to find the arc length given the circle area a = 25π cm2 and θ = π 4 . a) 20π cm b) 5π 4 cm c) 4π 5 cm d) 10π 4 cm

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.