Sander's Jewelry Store is having a watch sale. Watches that originally sold for $950 each are on sale for $617.50. The store has 10 of these watches on sale. What is the percent of price change?

David bought a poster for an art project. the poster is 2.7 feet wide and 3.9 feet tall. what is the area of the poster?

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

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%.