Solve the formula for the variable given.Then use the given information to find the value of the variable.
A=2πrw
Find r if w=4ft
And A=120ft square.
Please someone help me with this!!!
just sub in your values
120 = 2π(r)(4)
120/( 8π) = r
button pushing time!
(I would punch in ...
120
÷
8
÷
π
=
to get appr. 4.775
To solve for the variable (r) in the formula A = 2πrw, we need to isolate the variable on one side of the equation. Here's how you can do it step by step:
1. Start with the formula: A = 2πrw
2. Substitute the given value of w into the equation: A = 2πr(4)
This gives you: A = 8πr
3. Substitute the given value of A into the equation: 120 = 8πr
4. Divide both sides of the equation by 8π to isolate the variable r:
120 / (8π) = r
5. Simplify the expression on the right side: r ≈ 4.7746
Therefore, the value of variable r is approximately 4.7746 feet, when w = 4 feet and A = 120 square feet.