160 is the first because 1 inches 20 but it says 2 inches so at 40+40+40+40
and the 2nd part is yes he is correct because he converted the inches into feet so i think he is also correct
U subtract 4x by 5x and then you add 3 by -21 and the answer is x=18
You’re correct answer would be : 14 lmk if this is correct if not I’m so SORRY
So this "327,000,000,000" needs to be converted into scientific notation, in which the answer that I will get would be 3.27 10^11, in calculation (as in calculator), you will get 3.27E+11.
Hope this helped!
Nate