Answer:
You should probably use a website called desmos if u ever need to graph somethin
Step-by-step explanation:
The radius is 4.583, just take the square root of 21
Combine the like terms.
4x^4+3x^3-16x^2+27x-18
If the triangle was a right triangle, then you can use the Pythagorean theorem to find the lengths.
A can of paint is a cylinder, so we must use the surface area for a cylinder.
2(

r

) is the top and bottom.
The surface of the can is a rectangle with a length equal to the circumference of the can.