Parentheses (brackets/braces) are done first according to the order of operations.
Answer A
Set the length of the base as x, the two equal sides are then 4x each, so the perimeter is x+4x+4x=9x
28.2% of 1128
(28.2%)(1128)
(28.2/100)(1128)
(0.282)(1128)
318.096
The answer is 318.096
You can add 4/9.
A simple trick is to look at the numerator and denominator separately, if they're both perfect squares then you're good (4, 2^2, check. 9, 3^2, check.)
