One link in a chain was made from a cylinder that has a radius of 2.5 cm and a height of 22 cm. how much plastic coating would be needed to coat the surface of the chain link

The correct answer is indeed 384.65 cm^2 but for some reason on the test the answer is 345.4 cm^2

Step-by-step explanation:

We require to coat the area of with the plastic coating.

SOLUTION:

Given, one link in a chain was made from a cylinder that has a radius of 2.5 cm and a height of 22 cm.

We have to find how much plastic coating would be needed to coat the surface of the chain link

So, we have to find the total surface area of the cylinder.

We know that total surface area of the cylinder is given by 2 \pi r(r+h) where r is radius and h is height.

Now, here r = 2.5 cm, and h = 22 cm

So, total surface area

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

the anwser is d) 75°

step-by-step explanation: