How many significant figures does 120 have

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

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

Change negative exponents to positive. then solve. round to four decimal places