Shelly is a 46-year-old woman whose menstrual cycle has changed and is now more irregular and infrequent. which term best describes shelly's condition?

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

What does the number 18.9984 represent in the image?

What are potential sources of error in marta’s experiment