Trey estimates the length of the basketball court is 70 feet. After measuring the court, it was actually 50 feet. What is Trey's percent error?
*
1 point
28%
0.4%
0.28%
40%
To find the percent error, we use the formula:
Percent Error = [(Observed Value - Expected Value) / Expected Value] * 100
In this case, the observed value is 50 feet (actual measurement) and the expected value is 70 feet (Trey's estimate). Plugging the values into the formula, we get:
Percent Error = [(50 - 70) / 70] * 100
Percent Error = [-20 / 70] * 100
Percent Error = -0.285714286 * 100
Percent Error ≈ 28.57%
Therefore, Trey's percent error is approximately 28.6%.