81 because each person has 9 people to greet and there’s 9 people so 9x9=81
325 dollars? You have to finish the question for anyone to answer it.
Answer:
endometrium
Explanation:
The endometrium changes throughout the menstrual cycle in response to hormones. During the first part of the cycle, the hormone estrogen is made by the ovaries. Estrogen causes the lining to grow and thicken to prepare the uterus for pregnancy.
