Lorena's backpack has a mass of 3000 g what is the mass of lorena's backpack in kilograms

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation