What is the answer to this?

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%.

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5