What is the constant of proportionality in the equation y=0.5x?

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a

i’ll just s take the points thxs

idk

step-by-step explanation:

umm you say your want to . but you do know that this is the mathematics.  

o~o