The area of a rectangle is calculated through the equation, V = L x W. That of the circle is equal to V = πr². These areas should be equal,
V = L x W = πr²
Substituting the known values,
2 ft x 11 ft = (22/7)(r²)
The value of r is sqrt 7.
There are 36 drama DVD's
<em><u>Solution:</u></em>
Given that there are 48 DVD's of comedies and dramas on shelf
25 % of DVD's are comedies
To find: number of drama DVD's
Total number of dvd = 48
Number of comedy dvd = 25 % of 48
Let us find 25 % of 48
![\rightarrow 25 \% \text{ of } 48\\\\\rightarrow 25 \% \times 48\\\\\rightarrow \frac{25}{100} \times 48\\\\\rightarrow 0.25 \times 48 = 12](https://tex.z-dn.net/?f=%5Crightarrow%2025%20%5C%25%20%5Ctext%7B%20of%20%7D%2048%5C%5C%5C%5C%5Crightarrow%2025%20%5C%25%20%5Ctimes%2048%5C%5C%5C%5C%5Crightarrow%20%5Cfrac%7B25%7D%7B100%7D%20%5Ctimes%2048%5C%5C%5C%5C%5Crightarrow%200.25%20%5Ctimes%2048%20%3D%2012)
Thus, number of comedy dvd = 12
Thus we get,
number of drama DVD's = Total number of dvd - number of comedy dvd
number of drama dvd = 48 - 12 = 36
Thus there are 36 drama dvd's
This is a relatively simple half life calculation.
To go from 6 to 3 grams, 1622 years is required.
3 to 1.5 grams another 1622 years is required.
So, it undergoes exactly 2 half-lives or 3,244 years.
To see more about half-life click here:
http://www.1728.org/halflife.htm
I think 20 hope that helps
The product to your question is 2a+b