Answer:
Design B bulbs will likely last longer than design A bulbs
Step-by-step explanation:
The B box part spans higher numbers than the A box and the median of B bulbs is higher than median of the A bulbs.
i am pretty sure that it is one of them from the right(the ones that start with B)
perimeter =2 (l+b)
140=2 (l+40)
140=2l+80
120/2=l
l=60
471.24