Write an expression using fractions to show how to determine the amount that each person will pay. Then calculate each person's contributions showing all steps in long division. Joseph: 31.80$

Zach: 32.40$

Mark: 33.60$

Luke: 37.20$

Entire Bill: 135$

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The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if