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Anarel [89]
3 years ago
10

Why isn't iron used to make coin

Physics
2 answers:
AleksandrR [38]3 years ago
7 0
If iron were used to make coins then it would rust easily,because of its exposure to water, air etc..
Anna007 [38]3 years ago
7 0
Iron is highly reactive, particularly to oxygen and water. This means it will oxidize, or rust.
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For 1983 through 1989, the per capita consumption
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Answer:

y = 43.55 + 2.15t

Explanation:

We were told that in 1983, the per capita consumption was 37.1 pounds, and in 1989 it was 50 pounds.

If we assume t = 0 corresponds to year 1980. Then, for 1983 it will be t = 3 and for 1989,it will be t = 9.

Thus, expressing the information as ordered pairs, we have; (3,37. 1) and (9,50).

Let us now find slope of the linear function:

m1 = (y2 - y1)/(t2 - t1)

m1 = (50 - 37.1)/(9 - 3)

m1 = 2.15

So, we can find the linear equation as;

y - 37.1 = 2.15(t - 3)

y = 37.1 + 2.15t - 6.45

y = 43.55 + 2.15t

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