Which form is correct

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?

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)

Suppose jose bars 4 pounds of sausage that cost $8.79 per pound a bottle of mustard that cost $1.38 and two loaves of cuban bread that cost $3.99 each how much did jose spend in all