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ivanzaharov [21]
3 years ago
15

I don't understand math @ all please help

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
7 0
More than likely it is c, because I looked over all the answers and c was the best one for the problem
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A country is planning to decrease government spending in order to reduce the national debt. If the outlined changes are put into
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<u>Answer</u>

Graph D represents the national debt of the country over the next years.

<u>Solution-</u>

The country's debt will decrease exponentially by one-third each year.

Current debt is $60 billion.

This problem can be treated as an exponential decay problem.

The general exponential decay function is,

y=a(r)^{-x}

Where,

a = initial value,

r = rate of change,

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Here, the rate of change is 3 as each year the debt becomes on third, and initial value of debt is $60, so

y=60(3)^{-x}

Plotting a graph taking number of year on x-axis and debt on y-axis, we can generate a graph for this function.

Putting different values of x, we can get the values of y. So the graph must have (0, 60), (1, 20), (2, 6.66), (3, 2.22), (4, 0.74), (5, 0.24) points on it.

Option B and C are incorrect, as they do not start from 60. (they don't have (0,60) on their curve)

Between option A and D, curve in D has all the points on it. So D is the correct graph.

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How do you solve 21r &lt; 7?
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Please help.ASAP.Thank you!
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