Leslie has a set of 8 cards numbered 1 to 8. She randomly selects 2 cards one at a time WITHOUT replacement. What is the probability that she selects an odd number first and then an even number? Make sure to simplify!

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?