The unit rate of miles per hour is 28
A regular pyramid has a regular polygon base and vertex over the center of the base.
Missing question: How many executives should be surveyed?
Solution:
Mean = 13 hours
SD = 3 hours
Confidence level = 95%
Mean viewing time within a quarter of an hour = 0.25 = 1.96*3/sqrt (N)
Where N = Sample population
N = {(1.96*3)/0.25}^2 = 553.19 ≈ 554
Therefore, 554 executives should be surveyed to yield such results.
989.5 divided by 17.8 is 55.5898876404
so about 55 ish
I think that's right but I'm not sure :)