Is the student text plagiarized? Compare the student text with the source- source: Michelle Z. Donahue, How much does it cost ( the planet) to make a penny? Published on Smithsonian,2016: pennies having an estimate of 25 years lifespan, but because so many of them fell through the proverbial, crack s, demand from year to year varies. students text: As Donahue writes, every year the demand for pennies varies because so many of them fall through the proverbial cracks. Is the student text plagiarized?