the plastic rod has a length of 125cm with a possible error of 2%. the number of these rods that must be placed en to end to ensure a total length of at least 39690cm is
a.) 318
b.) 320
c.) 322
d.) 324
e.) 326
0.98* 125 = 122.5 so they could all be that short (although unlikely but that is for another day)
122.5 n = 39690
n = 324