The net energy of 1 ton of coal is 2.8 x 10^6 BTU. The cost of extracting the coal, transporting it, and burning it is 4.2 x 10^6 BTU. What was the gross energy of the coal?

Dis the correct answer thats what i put and it was right 

The principle of independent assortment describee how different genes independently separate from one another when reproductive cells develop.

The answer is capillaries

Obtaining enough restrationale: as the blood volume doubles during pregnancy, heart failure can occur. the pregnant woman needs to obtain adequate rest to prevent overworking the heart. fluid may need to be restricted.