I am supposed to simplify 28/4a^3 times 4a^5/21 times 3/49a^4. I just want to make sure my answer is correct since I have a difficult time with these problems. Is it 4/7a^6?
28*4*3/(4*21*49 = 7*4*4*3/(4*3*7*7*7)
=4/49 not 4/7
a^5/a^3 = a^2 and a^2/a^4 = 1/a^2 not 1/a^6