The lens of a telescope has a radius of 4 feet. What is the lens's area?
Use 3.14 for 𝜋. If necessary, round your answer to the nearest hundredth.
square feet
The formula for the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the radius of the lens is 4 feet, we can plug this into the formula:
A = π(4)^2
A = π(16)
A = 16π
Since we are asked to use 3.14 for π, we can calculate the area:
A = 16(3.14)
A = 50.24
Therefore, the area of the lens is approximately 50.24 square feet.