The formula for the area of a circle is A=πr².
A=πr²
A=π4²
A=π16
Assuming you use 3.14 for π,
A≈50.27
Answer: The answer is (d) It is an irrational number.
Step-by-step explanation: Given formula for circumference of a circle is

where 'd' is the length of the diameter and a rational number.
We are to choose one of the given four options for the circumference 'c' of the circle.
We know that the circumference of a circle with diameter 'd' is given by

Comparing this with the given equation, we get

Now, the product of a rational and an irrational number is again irrational, so 'r × d' will be an irrational number.
Hence, the circumference, c = rd is irrational.
Thus, the correct option is (d) It is an irrational number.
I believe it’s 70 because a straight like always adds up to 180 so 180-110=70
20 cents
just divide $1.60 by 8
Answer:
option 3
Step-by-step explanation: