If p(c)=.29, p(d)=.47 and p(c and )= 0, are the events c and d mutually exclusive? find p(c or d)

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?

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out

What is the graph of the absolute value equation ? y=|x|-5