Teresa estimates that the height of a giraffe in a zoo is 18 feet. In fact, it is 16 feet tall. What is Teresa’s percent error? Use proportional relationships to solve the problem. Show all your work and round your answer to the nearest tenth
To find Teresa's percent error, we first need to calculate the difference between her estimate and the actual height of the giraffe:
Difference = Actual Height - Estimated Height
Difference = 16 feet - 18 feet
Difference = -2 feet
Next, we need to calculate the absolute value of the difference:
|Difference| = |-2 feet| = 2 feet
Finally, we can calculate Teresa's percent error using the formula:
Percent Error = (|Difference| / Actual Height) * 100%
Percent Error = (2 feet / 16 feet) * 100%
Percent Error = 0.125 * 100%
Percent Error = 12.5%
Therefore, Teresa's percent error is 12.5%.