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25:02
Question
Rearrange the formula A = πr^2 for r.
Responses
A r = πr = A π
B r =
π
r = A π
C r =
π
r = π A
D r =
π
Correct answer: B
Explanation: To rearrange the formula A = πr^2 for r, you need to isolate r on one side.
1. Start with the formula A = πr^2.
2. Divide both sides by π to isolate r^2: r^2 = A/π.
3. Take the square root of both sides to find r: r = √(A/π), or r = sqrt(A/π).
Therefore, the correct rearranged formula for r is r = sqrt(A/π).