1.23e-4 is the same as 1.23 * 10^-4
So, 2.36e6 would be your answer
<span>* carbon-14 levels in a sample are undetectable after approximately nine half-lives.
Nine half-lives pf carbon 14 is 51,570 years.
Source:
https://en.wikipedia.org/wiki/Radiocarbon_dating
</span>
The unit rate of the car is simply the average speed of the car between the two points.
The unit rate of the car is 40 miles per hour
From the diagram (see attachment), we have:
- The distance between the two points is: 80 miles
- The time spent to cover this distance is: 2 hours
<h3>The unit rate</h3>
So, the unit rate is:

This gives

Simplify the quotient

Hence, the unit rate of the car is 40 miles per hour
Read more about unit rates at:
brainly.com/question/4931057
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