Approximately how long does the menstrual cycle last if fertilization does not take place?

not sure if this is what you'r looking for nnew= nold

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.