7699......................
The population of the state of California was about 37,250,000 people in 2013. Which number best approximates the population as a single digit times a power of 10?
A. 3 × 10⁻⁶
B. 4 × 10⁻⁷
C. 3 × 10⁶
D. 4 × 10⁷
Answer:
Option D = 4 × 10⁷
Step-by-step explanation:
We are given the population of people = 37,250,000 people
We round to a power of 10
and that would give us 3.7 × 10⁷
We are told in the question to approximate the population as a single digit,
3.7 × 10⁷ s a single digit = rounding up to the nearest whole number
= 4 × 10⁷.
Therefore, the number that best approximates the population as a single digit times a power of 10 is
= 4 × 10⁷
This is simple division:
![t = \frac{10026}{2228}](https://tex.z-dn.net/?f=%20t%20%3D%20%5Cfrac%7B10026%7D%7B2228%7D%20)
So, plug it into your calculator and you get:
![t = 4.5](https://tex.z-dn.net/?f=t%20%3D%204.5)
Your answer's that
it takes 4.5 hrs for the surveillance run.
If you want to take 20% off $9, you must find 80% of $9. As 100% - 20% = 80%.
80% turns out to be 4/5, 8/10 or 0.8.
8/10 x 9
= 72/10
= 7.2
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Answer:
$7.20