A because if you slit up the squares one equals 32 and the other is 70 add them it’s 102
-8 is not a solution to 512 because when you multiply 2 negative numbers together it becomes positive, but you're multiplying it three times. so - 8 * -8 = 64 but if you multiply -8 again the solution will be a -512 not a positive 512
0.4 and 0.40 are equal. That zero on the hundredths place does not matter.