Question

In a city, the people use

Answer 1

Answer:  $4.14 \times 10^9$

Explanation:

Place the decimal point between the first two digits to get 4.14

Now ask yourself: How many places must we move the decimal point to go from 4.14 back to 4,140,000,000?

The answer is 9 places to the right.

This means we'll have 9 as the exponent over the 10

$4,140,000,000 = 4.14 \times 10^9$