It B. You enter 5 instead of x and calculate.
8) a regular dodecagon has 12 equal sides. So if one side is 9.25 cm, a formula we can use is:
P = 12*9.25, which is:
P = 111 cm
9) A rhombus has four equal sides, so a formula we can use is:
P = 4*1.75, which is:
P = 7 yd
10) A paralleogram has four sides where opposite sides are equal, so a formula we can use is:
P = 2*10.4 + 2*5.6, which is:
P = 32 m
Answer:

Step-by-step explanation:
Given that,
The diameter of the cylinder, d = 8 cm
Radius, r = 4 cm
Height of the cylinder, h = 16.8 cm
We need to find the surface area of this cylinder. The formula for the surface area of the cylinder is given by :

So, the surface area of the cylinder is 
2x3(S-+7)=6xS=7............
im doing the same thing but add some numbers sorry bro im failing