Fluorine-18 has a half life of 118 minutes. If a sample starts at 250g, how much remains after 472 minutes

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

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?

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax