C is the closet to the real answer and its a estimate so, C
<span>2.31*10-^3 using scientific notation
= 0.00231</span>
M-5-(-12) would equal m+7 because there is a negative before the parentheses and in the parentheses which means you would change it to a positive so, negative 5 plus positive 12 is 7 and since the 7 is positive you would add m (hope this helped)
I’m 89% sure it’s d
hope it helped :)
