Answer:
He will need 39 bricks to buy.
Explanation:
Given:
Radius of the circular fountain = 5 feet.
Each brick covers an area = 2 ft².
Now, to find the bricks he will need to buy.
So, we get the area of circular fountain by putting formula:
Using the value π = 3.14.
![Area=\pi r^2\\\\Area=3.14* 5^2\\\\Area=3.14* 25\\\\Area=78.5\ feet^2.](https://img.qammunity.org/2021/formulas/mathematics/high-school/m4z3nfal0s47ttdvodw7t68vxskebc9nji.png)
Area of the circular fountain = 78.5 feet².
According to question:
Each brick covers an area = 2 ft².
Now, to get the number of bricks he will need to buy:
![(Area\ of\ the\ circular\ fountain)/(Area\ each\ brick\ covers)](https://img.qammunity.org/2021/formulas/mathematics/high-school/hjya74ilr0831zid6oagl64hxg4tuasyxu.png)
![=(78.5)/(2)](https://img.qammunity.org/2021/formulas/mathematics/high-school/97ijmtbi8qc50225cm6hpkjtbyzgkydi80.png)
![=39.25.](https://img.qammunity.org/2021/formulas/mathematics/high-school/b5p32wu9hox0rbelurkqhjlney9dl7hr3x.png)
Approximately 39 bricks he need to buy.
Therefore, he will need 39 bricks to buy.