Which two pieces of evidence support the idea that coal is underutilized? a. only five percent of the power is used in traction on railway lines and the fact that ninety-five percent of it is lost b. americans are richly blessed with natural resources and coal, an important factor in human civilization, will run out soon. c. the present coal-mining practice does not extract more than half of the available coal and the fact that it leaves some parts of coal out of reach d. we treat coal as though it will never run out and the fact that some coal fields in iowa are already exhausted

The two pieces of evidence that support the idea that coal is underutilized are:

Idea can be defined as a thought or an opinion about a topic. It can be an imagination, conception, or notion. Evidence is the proofs that support an opinion.

The sentences that evidence the idea that coal is underutilized are sentences A and C.

Sentence A points out that only 5% of coal is used and 95% is lost. Whereas sentence C states that half of the coal does not get extracted by the coal-mining practices.

Therefore the correct options are A and C.

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Underutilization means something is not being used or explored to full potential. In that sense, the two pieces of evidence that support the idea that coal is underutilized are:

A.  

only five percent of the power is used in traction on railway lines and the fact that ninety-five percent of it is lost;

C.  

the present coal-mining practice does not extract more than half of the available coal and the fact that it leaves some parts of coal out of reach.

The options above offer us facts about the underutilization of coal. More than 90% of it is lost when used in railway lines and half of the coal available is not properly extracted. Options B and D, on the other hand, tell us about the importance of coal and the fact that we will run out of it soon. The underutilization mentioned in options A and C is certainly one of the main reasons for the exhaustion of coal.

in the problem you wrote said that the taxi charges $0.070 per mile(which would be 7 cents per mile), but then in your suggested equation you have it as $0.70 per mile (which is 70 cents per mile).

the latter seems more realistic, so i will assume that the taxi costs $5.00 and charges $0.70 per mile with tolls costing an additional $3.50. and it asks you to find how far you can travel on $36.50.

let x the number of miles traveled. since the taxi charges $0.70 per mile, multiplying this by the miles traveled (x) will yield the cost of the taxi ride as far as how far it took you. then adding this amount to the cost of the taxi ($5.00) and the additional cost for the tolls ($3.50) will give you the total cost of the taxi ride ($36.50)

that is,

            (0.70)x + 5.00 + 3.50 = 36.50

adding the like terms on the left-hand side of this equation, we arrive at the following:

            (0.70)x + 8.50 = 36.50

subtracting 8.50 from both sides of the equation, we get:

            (0.70)x = 28.00

to solve for x, divide both sides of the equation above by the coefficient of x (that being, 0.70):

            x = 40

thus, you can travel up to 40 miles on $36.50