Im to lazy for math can u help me please?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position