Matt picks a marble from a bag, replaces it and then chooses a second marble. There are 3 red marbles in the bag and 2 black marbles. Draw
a tree diagram showing the possible outcomes for Matt's marbles. What is
P (red marble on both turns)?

The volume is 2212m cubed

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.