SOLUTION: Hello, i was wondering if anyone could help me with this one problem. I did get an answer but i wasnt sure if i was right. The worlds copper reserves were 950 million tons in

Question 86449This question is from textbook Modeling, functions,and graphs
: Hello, i was wondering if anyone could help me with this one problem. I did get an answer but i wasnt sure if i was right.
The worlds copper reserves were 950 million tons in 2004; total annual consumption was 16.8 million tons.
A- Assuming the copper consumption continues at the same level, write an equation for the remaining copper reserves, R , as a function of time, t (in years since 2004)
B-Find the intercepts and graph the function
C- what is the significance of the intercepts to the worlds copper supply?This question is from textbook Modeling, functions,and graphs

Answer by stanbon(48516) (Show Source):
You can put this solution on YOUR website!
The worlds copper reserves were 950 million tons in 2004; total annual consumption was 16.8 million tons.
A- Assuming the copper consumption continues at the same level, write an equation for the remaining copper reserves, R , as a function of time, t (in years since 2004)
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copper(in year) = -16.8(t) + 950
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B-Find the intercepts and graph the function
Let t=0, then copper reserve is 950 million tons
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Let copper reserve be zero; then -16.5t = -950
t = 57.57 years; this means the copper reserve
will disappear 57.57 years after 2004 or during
the year 2062.
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C- what is the significance of the intercepts to the worlds copper supply?
Answered above.
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Cheers,
Stan H.