Answer:The area of a circle is pi times the radius squared (A = π r²)
Step-by-step explanation:The area of a circle is pi times the radius squared (A = π r²)
Answer:
Proof for 
Step-by-step explanation:
We are given that a, n, b, r and k are integers.
Also,

Since k divides a and b, we can write,
a = rk and b = sk, where r and s are integers.
Now, we have to prove that k divides r as well that is 
Putting value of a and b in the equation, we get:

Since, (r-sn) is an integer, k divides r.
The decimal of 2.1 is greater than 2.0 but less than 2.42
Answer:
34:48
Step-by-step explanation:
adult:child
34:48
simplify: ÷2
17:24