27/4x^6 y^8
step-by-step explanation:
4(3x^2y^4)^3 (2x^3y^5)^4
=
108x^6 y^12 /16x^12 y^20
108 /16x^6 y^8
27 /4x^6 y^8
agree
192/15 = 12.8.
12.8
192/15 is 12.8.
however, it says to round to the nearest foot, which would equal 13.