A student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?
A. 4.2%
B. 4.0%
C. -4.2%
D. -4.0%
D?
the estimated mass is to high (positive error)
the amount is 10/240 ... A
Thank you soo much :D
To calculate the percent error, you need to calculate the difference between the measured value and the estimated value, divide it by the measured value, and then multiply by 100.
First, calculate the difference between the measured value and the estimated value:
240 g (measured value) - 250 g (estimated value) = -10 g
Then, divide the difference by the measured value:
-10 g / 240 g = -0.0417
Finally, multiply the result by 100 to get the percent error:
-0.0417 * 100 = -4.17%
Therefore, the correct answer is C. -4.2%.