2p³+5p²+6p+15. Solve by grouping

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

100 points, hi, i’m not sure how to get the equation from the graph and table.

The radius of a sphere is 3 inches. which represents the volume of the sphere?