The surface area of the cylinder that forms the "sides" of the microvillus rod is given by the area of the curved surface of a cylinder with diameter (d) = 0.1 μm and height (h) = <span>1.0 μm.
The curved surface area of a cylinder is given by 2πrh, where r = d / 2 = 0.1 / 2 = 0.05 </span><span>μm.
Thus, the curved surface area is given by

Therefore, </span>the surface area of the cylinder that forms the "sides" of the microvillus rod is
The answer is B ! as vertex is (6,3) and axis of symmetry lies on x=6 !
if you need explanation, comment !
Use the formula
Area= base times height.
You're given that area =300cm^2 and base=20 cm.
Plug these into the equation to get 300=20 x height. Now, you just need to solve for height. To do this, you need to undo the multiplication of b x h by dividing the area by the base.
So, h = 300/20
Simplify for an answer of 15.
3/99 = 1/33
So 3 ÷ 99 = 1/33 = 0.030303030303, or 33%