C. 2g-19.5=40 I think i'm right
I think the answer is (7x-3)(7x+3)
This is simple. It is 7 factorial, or 7!. This just means 7*6*5*4*3*2*1, which is 5040.
5.77
By 0.07
Because if you subtract 0.07 from 5.77, you get 5.7, so it must be smaller.
I am not sure if you gave all of the information but if you did A because A > B. Did I miss something?