Plz help me 10/1 math hw

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%.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry