Ted is a single guy who’s living the good life. the spreadsheet below shows ted’s cash flow for a month.

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%.

Which expression is equivalent to the expression shown?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?