Please helppp me I will mark brainliest

For the function, f(x) = -5x 2, find f(-4).

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%.

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100