Answer:
15 ft
Basic fact:
<em>a square is a quadrilateral shape that has all sides of the same length and all the angles are the same</em>
Step-by-step explanation:
using the fact above, we know that there are 4 sides of the same length
to find the length of one side we have to do
60/4
=15
14/12 is 1.166666666666667 as in a fraction its 7/6
<span>Since one standard deviation is 20 luggages, 3 standard deviations above the mean is 3*20=60 luggages above the mean of 380 luggages, so 60+380 gives the answer C, 440.</span>