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5,400 kcal
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In an energy pyramid above, producers occupy the base of the pyramid. Which of the
following is correct?
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O a) Primary consumer has 5400 kcal
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b) Primary consumer has 540 kcal
c) Secondary Consumer has 5400 kcal
d) Secondary Consumer has 540 kcal

blah

explanation:

bc blah

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

your answer would be a, maximum exploitation of resources.