What is the relationship between the number of protons and neutrons in an atom and that element's atomic mass

Acompany produces items in small batches. the machinery needs to warm up before the items can be produced. the scatterplot shows the time needed to produce batches of different numbers of items. based on the line of best fit, which of these statements is true?

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d