The volume, V, of a cylinder is V=htr-h, where r is the radius of the cylinder and h is the height. Using rounding
to the nearest whole number, which of the following is an
estimate of the volume of a cylinder with a radius of
3.75 inches and height of 6.21 inches?
3
A) 145 in.
B) 180 in.
C) 288 in.
OD 290 in.

Your answer is C.

Round all the numbers then multiply since it says estimate.

Π = 3.14 = 3

3.75 = 4

6.21 = 6

3•4^²•6 = 288

step-by-step explanation:

the areas of two similar triangles are 18 cm2 and 8 cm2. one of the sides of the first triangle is 4.5 cm. what is the length of the corresponding side of the other triangle?

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.