Let f be a function defined on the closed interval -3 on what intervals, if any, is f increasing

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

Write as a product: ac^2–ad+c^3–cd–bc^2+bd