Can you please help me! ( Thank you so much! ). :)

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%.

How do you write something in scientific notation?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq