For a science experiment, Jack adds 1 tsp of salt to 3 tsp of water. Mika adds 4 tsp of salt to 9 tsp of water. Whose water is saltier?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if