A tree grows 1/4foot in 1/12 year .Write the rate at which this tree grows

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Bocephus has a bag full of nickels and dimes. if there are 3 times as many dimes as nickels, and he has $\$36.05$ in his bag, how many nickels does he have?

Which graph or graphs appear to show a sinusoid? < me asap !