jill measures the width of her bike seat at 123 mm, but its actually 130 mm. what is the percent error in…

Explanation:

Step1: Find the error

The error is the absolute - value of the difference between the measured value and the actual value. Let the measured value $m = 123$ mm and the actual value $a=130$ mm. The error $E=\vert a - m\vert=\vert130 - 123\vert = 7$ mm.

Step2: Calculate the percent - error formula

The percent - error formula is $Percent\ Error=\frac{E}{a}\times100%$. Substitute $E = 7$ mm and $a = 130$ mm into the formula: $Percent\ Error=\frac{7}{130}\times100%$.

Step3: Evaluate and round

$\frac{7}{130}\times100%=\frac{700}{130}% \approx 5.38%$. Rounding to the nearest whole percent gives $5%$.

Answer:

$5%$