Answer:

Step-by-step explanation:
Trust me.
we know the perimeter is 24, and is an equilateral triangle, so it has three equal sides, so each side is 24 ÷ 3 = 8.

-5/-7 = 5/7 = 0.71428577142857... The decimal form of the fraction never ends, so 5/7 is not a rational number
The volume is 336 cubic feet
6x8x3 = 144
8x4x6= 192
144+192=336