The state income tax on a gross income of dollars in a particular state is 3.75%. Write an algebraic expression that represents the total amount of income tax. (Hint: Use the decimal form
of 3.75%)

The two-way frequency table below shows data on playing a sport and playing a musical instrument for students in a class.

Find the sum of the following series. round to the nearest hundredth if necessary.

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)