Given:
The price of bananas can be determined by the equation P=0.25n, where P is the price and n is the number of bananas.
To find:
The constant of proportionality
Solution:
We have,
...(i)
where P is the price and n is the number of bananas.
Price P is directly proportional to the number of bananas. So,
...(ii)
Where, k is the constant of proportionality.
On comparing (i) and (ii), we get
Therefore, the constant of proportionality is 0.25.
For this case, the first thing we must do is define variables.
We have then:
x: length of the bookshelf
y: thickness of each book
The equation for the number of books is:
Substituting values we have:
Doing the calculation we have:
Answer:
200 copies of this book will fit on the bookshelf