Is 1/2=1/4 a proportional relationship?

NO

Step-by-step explanation:

By reducing the two ratios down to their simplest/lowest form we can see that the simplest form of 1/4 is 1/4 and the simplest form of 1/2 is 1/2, so 1/4 and 1/2 are NOT proportional to each other.

No it is not

Hope this helps

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