\[ 31.4159 = 2 imes 3.14159 imes r \]
![\[ 31.4159 = 2 imes 3.14159 imes r \]](https://soloferat.biz.id/images/314159--2-imes-314159-imes-r-.jpg)
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- A circle has a circumference of 31.4159 meters. Find its radius. Use \(\pi pprox 3.14159\).
- The circumference formula is \(C = 2\pi r\).
- Substitute \(C = 31.4159\) and solve for \(r\):
- Divide both sides by \(2 imes 3.14159\):
- \[ r = rac{31.4159}{2 imes 3.14159} = rac{31.4159}{6.28318} pprox 5 \]
- Calculate the derivative of the function \(f(x) = 4x^3 - 5x^2 + 2x - 7\).
