29.99-20%= 23.99
25.00-10%= 22.50 so, Mr.chang got the better deal ( but not by much.)
Firstly, let's take first factor:
(y^3)^2 = y^(3*2) = y^6
and then:
y^6 * y^7 = y^(6 + 7) = y^13
There are 120 female rabbits and 30 male rabbits because 30 times 4 is 120 and 120 plus 30 is 150
So you can play? I guess...
