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what does carter mean when he says conservation is “the cheapest source of energy”?

a. energy that is not used does not have to be paid for.

b. alternative sources of energy are cheaper than oil.

c. conservation makes oil basically free.

d. energy needs will increase if people conserve more.

A. Energy that is not used does not have to be paid for.

Explanation:

The us energy strategy comprises of creation models for nine mechanical divisions, a model of purchaser request, and a macroecono-metric development show for the U.S. economy.

The model is first used to extend monetary movement and vitality usage for the period 1975 to 2000 under the suspicion of no adjustment in vitality approach. The model is then utilized to plan an expense program for animating vitality preservation and lessening reliance on imported wellsprings of vitality. The general finish of the examination of assessment strategy is that significant decreases in vitality use can be accomplished without major monetary expense.

the correct answer is:   "   3.6 % " .

          →   the unemployment rate is:   " 3.6 % " .

explanation:

to calculate the "unemployment rate" :

the "unemployment rate"   =

  [# of people unemployed] /   [working age population]   * 100 %   ;

                =   [9 million] / [250 million]     *   100 % ;

    →     note:   the units of "million" cancel out;

                    since:   " {million} / {million} = 1 " ;

                =   (9 / 250)   * 100 %   ;

                = 0.036 * 100 % ;

                =   3.6 %

answer:   the unemployment rate is:   " 3.6 % " .