Question

2. Suppose there are 6 million people in New York City that walk an average of 2.5 miles per day. If we add up all the miles walked by these 6 million how many times around the Earth would these walkers have gone? Assume the distance around the Earth is 2.5 * 10 ^ 4 miles. Write your result in scientific notation.

Answer 1

Answer:

• 600 times

Step-by-step explanation:

Given

Number of people:

• 6 million = 6*10^6

Distance to walk:

• 2.5 miles per day per person

Distance around the Earth

• 2.5*10^4

Solution

Total distance walked:

• 6*10^6*2.5 = 15*10^6

The ratio of total distance to the distance around the Earth:

• 15*10^6 / 2.5*10^4 = 6*10^2 = 600 times

Answer 2

Number of people:

6 million = $6$ × $10^{6}$

Distance to walk:

2.5 miles every day per person

Distance around the Earth

$2.5$ ×$10^{4}$

Total distance walked:

$6$ × $10^{6}$ × $2.5$ $= 15$ × $10^{6}$

The ratio of total distance to the distance around the Earth:

$15$ × $10^{6}$ / $2.5$ × $10^{4}$ = $6$ × $10^{2}$ = $600$