Four hundred raffle tickets were sold for $4 each. the one first prize winner will receive $300, and two people will each receive second prizes of $200. there will be three $100 winners. what will be the expected value of the raffle?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Find the values of y: 3y^3(y^2+ 2/3y)=0

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca