A student was told to use the balance to find the mass of a 500 g piece of metal. He goofed off for most of the lab period and then tried to finish his experiment quickly at the end. Since he was in such a rush he reported the weight of the metal as 458 g. What is his percent error?

this is an axample of when a math teacher is bad at there job

Step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this