It is D
What you need to do is find the total of people which is 303.
then you do the 3 rule
100% = 303
x% = 215 (add the people who have 2 or 3 cars)
210*100/303=70.9%
<h3>
Answer:</h3>
60 days
<h3>
Explanation:</h3>
Half-life is the amount of time it takes half of a substance to decay away.
Guess and Check
One method for solving half-life problems like this is to guess and check. To do this, we can continue to divide 475mg by 2 until we get to 30mg.
- 475 ÷ 2 = 237.5
- 237.5 ÷ 2 = 118.75
- 118.75 ÷ 2 = 59.375
- 59.375 ÷ 2 = 29.6875
As seen here, it takes approximately 4 half-lives for this sample of Ra-225 to decay to 30mg. Now, we can multiply 4 by the length of the half-life, 15 days.
Fractions
Another way to solve this is to use fractions.
- 16 is equivalent to
.
This means that it takes 4 half-lives for 475mg to decay to 30mg. Using the same method above, we can tell that 4 half-lives are 60 days.
Important Note
In this question, I rounded occasionally. So, not all of the values are exact, but they are all very close.
What the narrator observe about Simon Wheeler was that the Wheeler is pompous and stuffy.
The narrator, observed this because, the way the wheeler was described.
<h3>What is the story all about?</h3>
This The <em>Notorious Jumping Frog of Calaveras County"</em> was a story that based on Jim Smiley, he loves betting, and turned a frog into a pet.
CHECK THE COMPLETE QUESTIONS
In The Notorious Jumping Frog of Calaveras County," what does the narrator observe about Simon Wheeler?
O À Wheeler is pompous and stuffy
BWheeler is critical of others
C. Wheeler is dull but eamest
D. Wheeler is utterly foolish
Learn more about the story at;
brainly.com/question/1033117
The group that measures precisely and all three times.