Answer:
about 190,080 people
Step-by-step explanation:
The occupied space is 30 ft wide by 2 miles long, so is ...
(30 ft)(2×5280 ft) = 316,800 ft^2
The number of people per square foot is ...
(15 people)/(5 ft)^2 = 0.6 people/ft^2
Multiplying the area by the density, we get an estimate of the number of people:
(316,800 ft^2)(0.6 people/ft^2) = 190,080 people
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It might be appropriate to round this number to the nearest 1000 or even the nearest 10,000. Either way, that estimate is then 190,000 people.