Astudent estimated a mass to be 250g but upon carefully measuring it found the actual mass to be 240g. what is the percent error?

4.17%

Step-by-step explanation:

Given : A student estimated a mass to be 250g but upon carefully measuring it found the actual mass to be 240g.

The formula to find the percent error is given by :-

Hence, the percent error = 4.17%

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.