There are 2 red marble, 4 green marbles and 4 blue marbles. What is the probability or randomly selecting a green not replacing it, then selecting a blue ??

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

How do you write something in scientific notation?