Which of the following best describes a sector of a circle?
a. the distance halfway around a circle
b. a region inside a circle bounded by a central angle and its intercepted arc
c. a region outside a circle bounded by a central angle and its intercepted arc
d. the distance around a circle

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.