The perimeter of abcd is 66 and dc is twice as long as cb how long is a b

What’s the answer ? use the picture to see the problem

In 1995 america online had about 3000000 users over the next decade users are expected to increase from a few million to the tens of millions suppose the number of users increased by 150% by the year 2000 how many users will there be in the year 2000

Is (root2 -2)^2 rational or irrational. show the steps and answer fast