What is an element? carbon dioxide, hurdrogen, water, or air

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

The hypothetical island country of gilder lies in the mediterranean sea off the coast of france. demographers have studied gilder for the past 50 years. at the beginning of the study, gilder had a population of 20 million. the demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. from the data, calculate the population of gilder for each 10-year period by filling in the population (no) and population (nt) columns in the data table. use this formula to do your calculations: population size: nt = no + (b + i) – (d + e)initial population = 20,000,000

Approximately how close is russia to alaska ? a.5 miles b.50 miles c.500 miles d.5000 miles