Quan did a lab in chemistry class and found that the substance he was given had a mass of 3.4 G and a volume of 1.2 6ML. his teacher told him the following densities : calcium 1.55G/ML, magnesium 1.74G/ML, aluminum 2.7 G/ML, Iron 7.87, silver 10.5 G/ML, lead 11.34G/ML. can you identify what substance Quan has? ANSWER QUICK PLEASE!!

Which of the following represents the zeros of f(x) = 6x3 − 31x2 + 4x + 5? −5, one third , one half 5, − one third , one half 5, one third , − one half 5, one third , one half

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.