Me with #15 i will return with a thx

How many zeros does the function f(x)=4x3-x2+1 have

Write the rational number in lowest terms 99/-15

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.