Assume that aluminum is evaporating from a source at the rate of 5 x 1020 atoms/sec. make an estimate of the time it would take to form a 2000a layer on a 4" wafer that is 150mm distant [and perfectly square to the source b: if the evaporating source used above is charged with 5 grams of aluminum- how long could it evaporate at that rate?

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.

Sorry i don’t know what to do

I'm pretty sure the answer is c 

Ithink c because you have to work to become goid