You should study earth science because you will learn how scientists can determine how old rocks are and you will know about the earth better.
A scientific theory is an explanation of the natural world on the basis of facts which have been repeatedly confirmed by experiments and observations. <span>Scientific laws are rules that explain observations through either text or mathematic forms. These laws suggest cause and effect from observations and must be repeatable.
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Therefore this would be a fact-supported scientific theory as it is an explanation based upon repeatedly confirmed experiments and observations, unlike Scientific law, which would be mathematical.
Fossil Fuels. However, producing solar, water and wind power plants and generators cost a lot of energy, generated by fossil fuels. The problem is that 'green' energy sources don't repay the amount of energy used to make them. Fossil fuels are bad guys, but don't think placing solar panels everywhere will stop the greenhouse effect. Not until their efficiency is high enough to produce more energy than is put into them.
First off you should really type the equation in the proper order and also use the carat symbol to show that something is to the power too, so your equation shouldve looked like this.
-y^2 -4y + 4 = 0
But all yuo need to is plug the equation into a calculator and search for where it intersects the X line. the answers are
(.828, 0) , (-4.83, 0)