Need with question number 14. this is the hardest one yet.

Find the dimensions of the circle. area = 64π in.² r= in.

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)

Which fraction represents the ratio 35 : 42 in simplest form