Could you please help me with this question, as well as stating a clear explanation so I can understand it better. Thank you!

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?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

If you eat 4 medium strawberries, you get 48% of your daily recommenced amount of vitamin c. what fraction of your daily amount of vitamin c do you still need?