Li needs 3 more pieces, an 1 and 1/2 cut into 3 pieces.
Hi!
The scale factor is 3.
You just have to divide 6/2 to get 3.
It should be a.), all plant cells have a cell wall made of cellulose, which acts as exoskeleton and makes them so stable. However on a bigger level this plant cells can also form cellulose fibers, so that c.) is not completely false :)
when a=4 and b=3,
3.14((4 x 2)+ (4 x 3)) = 3.14(8+12) = 3.14 x 20 = 62.8
