The slope of every horizontal line is 0 because that is based on the formula. If it's horizontal on the x axis for example, the point slope will be 0,0, also the horizontal line is the numerator, i think. And the undefined slope is vertical because it's the denominator.
= 2 and 1/2 miles I believe
<span>A=2πr^2+2πrh
</span>A=π(2r^2+2rh)
π = A / (2r^2+2rh)
