SAT Question 8213b1b3: Percentages answer and explanation with Desmos solution

0014$.I{t}^{\prime }sgiventhatacertaintypeofsubstancecancontainamaximumof＄0.001\%$ phosphorus by mass to meet a set of standards. If a sample of the substance has a mass of ＄140$grams,itfollowsthatthemaximummass,ingrams,ofphosphorusthesamplecancontaintomeetthestandardsis＄0.001\%$ of $140$, or $\frac{0.001}{100}\left(140\right)$, which is equivalent to $\left(0.00001\right)\left(140\right)$, or ＄0.0014$. Note that .0014 and 0.001 are examples of ways to enter a correct answer.