Find the point on the sphere closest to the plane

Mabel paid $2.95 for a granola bar dimes and quarters. she used five few were quarters then dimes. how many dimes and quarters did she use to pay for the granola bar.

Consider the quadratic equation ax^2 +bx+5=0 , where a,b, and c are rational numbers and the quadratic has two distinct zeros.if one zero is irrational , the other zero is

Draw a graph y=f(x) that matches the following characteristics. increasing on: -8< x< -4 and-1< x< 5. decreasing on : -4< x< -1. f(-8)=-5 and zeros at x=-6,-2,and 3. absolute maximum of 7 and absolute minimum of -5.