Answer:
5.50 years
Step-by-step explanation:
A = P
A = final amount
P = initial principal balance
r = interest rate
n = number of times interest applied per time period
t = number of time periods elapsed
3178 = 2000(1+.086/2)^2t
t = 5.499904413
I need 22 and 24 ( solve using a graph and tables )
1 answer:
Answer:
22. x = 0.228 or 8.772
24. x = -0.869 or 1.535
Step-by-step explanation:
The solutions are all irrational, so it would be tedious arriving at a solution using tables. I prefer a graphing calculator for this.
The first attachment shows the problems with graphs of left-side and right-side expressions. The points of intersection are the solutions.
The second attachment shows the difference of the two sides of the equation. The x-intercepts of that difference are the solutions. The graph also shows the vertex of the quadratic, which lets you write down the exact solution. For y = a(x -h)^2 +k, the solutions are x = h ±√(-k/a) where (h, k) is the vertex and 'a' is the leading coefficient of the quadratic.
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22. x = 0.228 or 8.772
graphs in first attachment are red and orange
graph in second attachment is black
x = 4.5 ± √18.25
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24. x = -0.869 or 1.535
graphs in first attachment are blue and purple
graph in second attachment is red ('a' = 3)
x = (1 ±√13)/3
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