Write the numbers in order from greatest to least 7/10, 0.888, 3/5, 0.27
2 answers:
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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,
Where,
a = initial value,
r = rate of change,
-ve sign of x represents the decrease in value of y as x increases.
Here, the rate of change is 3 as each year the debt becomes on third, and initial value of debt is $60, so
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.
Answer:
A = $35,198.32
Step-by-step explanation:
<em>Use the formula to calculate compound interest</em>:
A = P(1 + i)ⁿ
"A" for total amount after the time period
"P" for principal, or starting money
"i" for the interest rate in a compounding period
To calculate "i":
i = r / c
"n" for the number of compounding periods
To calculate "n":
n = tc
So, we can <u>combine the formulas</u> into:
"c" is the compounding periods in a year. (quarterly = 4)
<u>We know</u>:
P = 8000
r = 10% / 100 = 0.1
t = 15
c = 4
<u>Substitute the information in the formula</u>.
Solve "i" and "n"
Solve inside the brackets
Do the exponent before multiplying by 8000
A = 35198.318 Exact answer
A ≈ 35198.32 Round to two decimal places for money
Therefore she will have $35,198.32 after 15 years.