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?
1.596
1096
11.196
9096

Tommy's percent error is 10%.

Step-by-step explanation:

Percent error is found with the formula , where P is the percent error, is the actual value that you measure, and is the accepted value or the expected value. For instance, the accepted value for specific heat of water is:

This would also be the expected value in a lab experiment.

We are given the accepted value of 15 feet. Therefore, we know that this is Then, we see that Tommy measures the length as 13.5 feet - this is

Finally, we need to place these values into the equation and solve for P.

Therefore, Tommy's percent error is 10%.

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.