There are 500 people in a building. 20% of half of them went out. 15% of those who went out came back in. How many people are in the building now?

Which expression is equivalent to 4 square root 6 divided by 3 root 2

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?