for a bake sale Helen made cookies and brownies the cookies sold 95 cents and the brownies sold for 60 cents if she bakes if she baked 31 items that sold for $23.85,how many of each dessert did she sell

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

The square root of 9x plus 7 plus the square rot of 2x equall to 7