Mrs. Rowan alotted 30 mintues at the beginning of class for her students to complete an exam. Tha lst student took 42 minutes to complete the exam. What is Mrs. Rowan's percent error?

Hey there!

To find percent error, we find the difference between the prediction and the actual value. We take that difference, divide it by the prediction, and multiply it by 100.

So let's find the difference.

42 - 30 = 12

Divide the difference, which is 12, by 30.

12 ÷ 30 = 0.4

Multiply this by 100 to get the percent.

0.4 x 100 = 40

The percent error is 40%.

Hope this helps!

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: