The surface area of a cylinder with circular bases of radius <em>r</em> and height <em>h</em> is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:
<em>A</em> = 2π<em>r</em>² + 2π<em>rh</em>
If you know the height <em>h</em>, then you can solve the quadratic equation for <em>r</em>.

The multiple zero is x = -4.
The multiplicity is 2 because there are two values of x.
Answer:
I believe the answer is 20 and 30
Answer:
15 girls
Explanation:
We know that the ratio of boys to girls in the classroom is 2:3, meaning that for every 2 boys there are 3 girls.
Now, we can set up a proportion to solve this problem.
Please see the picture attached.
I hope this helps!