Suppose that every car on the road burned up about two gallons of gas a day. for each gallon of gas burned, one pound of carbon dioxide is released into earth’s atmosphere. if 144 million cars are used in the united states each day, how many pounds of carbon dioxide are released into the air each week? about 2 billion pounds 288 million pounds 144 million pounds about 10 million pounds

There are 144 miliion cars, and each car on the road burned up about two gallons of gas a day. So 144 million cars burned up about 288 million gallons of gas each day .

And for one gallon, 1 pound of carbon dioxide is released into Earth's atmosphere. So for 288 million gallons, 288 million pounds of carbon dioxide is released each day.

Therefore in a week , 288*7 million pounds of carbon dioxide release, that is approx 2 billion pounds .

So the correct option is the first option .

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step-by-step explanation:

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: