Question

Ready Percent Change - Instruction Level G Tommy is measuring his bedroom to determine how much paint he needs to cover the walls. One wall is 15 feet long, but Tommy records the length as 13.5 feet. What is the percent error in Tommy's measurement?

A) 1.5%
B) 10%
C) 11.1%
D) 90%

Answer 1

To calculate the percent error in Tommy's measurement, subtract Tommy's recorded length from the actual length, divide by the actual length, and multiply by 100 to get the percentage. The percent error is b) 10%.

Step-by-step explanation:

To determine the percent error in Tommy's measurement, we need to calculate the difference between the actual length and Tommy's recorded length, and then divide it by the actual length and multiply by 100 to express it as a percentage.

The actual length is 15 feet and Tommy recorded it as 13.5 feet.

The difference between the actual length and Tommy's recorded length is 15 - 13.5 = 1.5 feet.

The percent error is (1.5 / 15) * 100 = 10%.