Pls help and show workings
I need help ASAP

Bring the fraction a/a-4 to a denominator of 16-a^2

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units

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)