For 6 the answer is c because 1 fourth goes into one and a half 6 times so you do 6 times 4 feet which is 24 feet
B+B=2
assuming that B is 1 I will say that 4 is C.
4+1*2= 10 is your answer.
The general rule for rotation of an object 90 degrees is (x, y) --------> (-y, x). You can use this rule to rotate a pre-image by taking the points of each vertex, translating them according to the rule, and drawing the image
They call it the Whirl Series ^.^