A local gym charges non-members $10 per hour to use the tennis courts. Members pay a yearly fee of $300 and $4 per
hour for using the tennis courts. Write and solve an equation
to find how many hours you must use the tennis courts to
justify becoming a member.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6