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!

it 2

step-by-step explanation:

8^1/3=2

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.