In a certain chemical the ratio of zinc to copper is 3 to 17 a jar of the chemical contains 595 g of copper how many grams of zinc does it contain

Can someone pls ! pls answer all. no explanation needed..

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол

Which is f(5) for the function –2x2 + 2x - 3?