(6th grade) i would really appreciate if someone could help me, and tell me how you got the answer, along with the steps !!

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Which is the graph of this function 3 square root of x plus one if