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Paraphin [41]
3 years ago
7

Erica had 6 coins in her coin collection. She goes to a coin show and buys some more coins. How many does she have now?

Mathematics
1 answer:
Svetlanka [38]3 years ago
4 0

Why would she be paying for another form of currency is the real question?

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Mrs. Cooper hosts an annual art contest for kids. She has records of the number of entries for the last 9 years. She received 30
Zanzabum

To graph this situation we must take into account the data and the organization of each of them on the X axis and Y axis.

<h3>How to graph this situation?</h3>

To graph this situation we must take into account the data we have:

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Based on these data, we assign the horizontal axis to count years and the vertical axis to count tickets per year. We must continue the pattern of increased attendance over the years.

Learn more about graph in: brainly.com/question/16608196

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Colin and Brian were playing darts. Colin scored 36. Brian scored 35 more than Colin. What was their combined score?
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Step-by-step explanation:

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One hundred grams of radium are stored in a container. The amount RR (in grams) of radium present after tt years can be modeled
Alona [7]
Ending Amount = Beginning Amount * e^k*t
5 grams = 100 grams * e^-.00043 * years

We have to solve the equation for "years"
(You can find the formula here: http://www.1728.org/halflif2.htm
or you can just read the next line

time = natural log (bgng amt / endg amt) / k
time = natural log (100 / 5) / .00043
time = natural log (20) / .00043
time = 2.9957322736 / .00043
time =  <span> <span> <span> 6,967</span></span></span><span> years
</span>
We should double-check this.
First, we need the half-life
k = ln(.5) / half-life
half-life = <span>-.693147 / -.00043
half-life = 1,612 years
Now let's see how many half-lives that is:
</span><span>6,967 / 1,612 years = 4.2 half-lives
So basically, after 4 half-lives the mass should go from

100
50  1 half life
25</span><span><span>  2 half lives</span>
12.5 </span><span>3 half lives
</span> 6.25 <span>4 half lives</span>

6.25 is very close to 5 grams so we can assume we have calculated correctly.


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3 years ago
Which inequality is graphed on the number line shown?
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X>-2 is the inequality graphed on the number line
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