15 out of 20 students own hand-held games; 105 out of 160 students own hand held games. PLEASE HELP ME ASAP

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

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?

Asinusoidal function whose frequency is 1/6pi