Answer:
The number of times coin thrown was <u>500</u>.
Step-by-step explanation:
Given:
A coin lands on heads 200 times. the relative frequency of heads is 0.4.
Now, to find the times coin was thrown.
Let the number of times coin thrown was be 
Relative frequency = 0.4.
Number of lands on heads = 200.
So, to get the number of times coin was thrown we put formula:


<em>By cross multiplying we get:</em>

<em>Dividing both sides by 0.4 we get:</em>

Therefore, the number of times coin thrown was 500.
Answer:
R = rows
C = columns
The chairs will be arranged in a way such that R * C
70
We know that R
20
70 / 20 = 3.5; however, you can't have half of a chair.
So find all the factors of 70 which don't exceed 20.
1, 70
2, 35
<h2>
5, 14</h2><h2>
7, 10</h2><h2>
</h2><h2>There are four ways that Brooke can set up the chairs:</h2><h2>5 rows of 14</h2><h2>7 rows of 10</h2><h2>10 rows of 7</h2><h2>14 rows of 5</h2>