Select the interval where f(x) > 0

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

If value of cos330° is √3/2 then find tan165°.