Can someone let me use there phone number for an homework app and its called Course hero, and i can't use my number bc iv already used it before, pls i beg u i depend on this app

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Which one is the correct answer, and why?