Identify the variable expression that is not a polynomial

D. 13

Step-by-step explanation:

13 is not a polynomial

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong