Question

Roger has a nail that is 12 centimeters long. He measures and records the length of the nail as 15 centimeters. What is the percent error in Roger's measurement?
A.
15%
B.
17%
C.
20%
D.
25%

Answer 1

what's the difference between the two numbers?

Answer 2

do you mean subtract?

Answer 3

yes

Answer 4

ok

Answer 5

3

Answer 6

??

Answer 7

awesome!

Then we have a formula...
\(percent~error=\large \frac{mistake~~difference}{true~~value}\)

Answer 8

in this case, 3 goes on top
and 12 goes on the bottom

Answer 9

\(percent~error=\large \frac{mistake~~difference}{true~~value} = \frac{3}{12} =?\)

Answer 10

hold on ill be back

Answer 11

ok im backwhat is the persent error??

Answer 12

\(3 \div 12 \times 100\)

Answer 13

25

Answer 14

you got it, that's the answer :)

Answer 15

great job @PrettyEyes

Answer 16

you can also thank people by giving them the "best response" award