How do you round a fraction to the nearest whole number

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

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