Teresa estimates that the height of a giraffe in a zoo is 18 feet. In fact, it is 16 feet tall. What is Teresa’a percent error? Use proportional relationships to solve the problem. Be sure to show all your work, provide your answer as a percentage, and round your answer to the nearest tenth.
To find the percent error, we need to divide the difference between the estimated and actual values by the actual value and then multiply by 100 to get the percentage.
The estimated height is 18 feet and the actual height is 16 feet.
The difference between the estimated and actual values is 18 - 16 = 2 feet.
So, the percent error is (2/16) x 100 = 12.5%.
Therefore, Teresa's percent error is 12.5%.