2 years ago

A large city has a population of 8,000,000 and an area of 20.5 square miles. what is the city's approximate population density?

Mathematics

1 answer:

gayaneshka [121]2 years ago

3 0

Answer: Approximately 390,244 people per square mile

Work Shown:

Density = population/area

Density = (8 million people)/(20.5 square miles)

Density = 390,243.9024 approximately

This rounds to 390,244 since we're talking about the number of people.

You might be interested in

What is the percent of 840 is 546

lesantik [10]

K so its an equation 546 x
over = over
840 100
when u do cross multiplication it will be 840x=546 * 100
x is about 64%
Hope this is helpful

4 0

3 years ago

A teacher randomly assigns her 30 students 4-digit I.D. numbers using the digits 0 to 9. No digits are repeated within an ID num

Olin [163]

The number of ways 4 digit numbers can be forms using the digits 0 to 9 with no number repeated is given by

$^{10}P_4= \frac{10!}{(10-4)!} = \frac{10!}{6!} =10\times9\times8\times7=5,040$

The probability that one of the numbers is 9876 is given by $\frac{1}{5,040}$