Answer: E. None of the above
Step-by-step explanation:
The equation to solve the problem should look like...2x = $2.91 / 3
That's an excellent question but we don't have enough information to answer it. We would need to know how the electrical energy is generated. Nuclear, hydroelectric, coal burning, wind, and natural gas burning all produce different amounts of carbon for the same amount of electrical energy. If the utility that supplies your house uses nuclear or wind, then you can leave both bulbs shining 24/7 and they're not responsible for any carbon.
Assuming you can't simply put the number inside a calculator: write the number as a fraction:
Find the prime factorization both numerator and denominator:
The square root halves the exponents, so the number becomes
-8,-4
7,0
-11/2,9/4
-5,2
-4,0
