Answer:
With how big our population is and how much energy and materials we use/need everyday of our life. It would make sense that Africa is rich in mineral resources because they use their resources carefully and don't use them as much as we do. They also don't have as much technology as we do.
Answer:
Clause of supremacy
Explanation:
The Clause of supremacy institute that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the "supreme Law of the Land", and thus take priority over any conflicting state laws. For instance, if a federal law in a constitution has already stated a particular way of addressing an issue, the state law can not change the rules even thought the said matter is happening in that particular state.
Answer:
payback period is 9.4785 ≅ 9.5 years
Explanation:
BTU stands for British thermal units and MCF stands for the volume of 1,000 cubic feet.
We know that one thousand cubic feet (Mcf) of natural gas equals 1.037 million Btu.
Difference between heat loss before and after installation = (42-28) millions BTU = 14 millions BTU
14 million BTU is equivalent to --
1.037 million BTU = 1 MCF
1 million BTU = (1/1.037) MCF
14 million BTU = (1/1.037) x 14 MCF = 13.5004 MCF
Cost of 13.5004 MCF = = $8.94 x 13.5004 = $120.6935
Pay back period = (1144/120.6935) = 9.4785
Therefore, her payback period is 9.4785 ≅ 9.5 years
