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algol13
3 years ago
13

The amount of money in a savings account after t years is represented by the function f(t)=500(1.015)^t. What does the value 500

represent in this situation?
Mathematics
1 answer:
MaRussiya [10]3 years ago
4 0

Answer:

Find out the what does the value 500 represent in this situation .

To prove

As given

The amount of money in a savings account after t years is represented by the function.

f(t)=500(1.015)^{t}

Exponential function for amount is given by .

Amount = a (1 + r)^{t}

Wher a is the initial value, r is the rate in decimal form and t is the time.

Compare the functions

f(t)=500(1.015)^{t}

and

Amount = a (1 + r)^{t}

Thus a = 500

Therefor $500 is the initial value .


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Find the approximate solution(s) to each of the following equations graphically. Use technology to support your
ser-zykov [4K]

Answer: x" = 5.69

Step-by-step explanation:

The graphic solution is attached.

Verifying the solution:

Existence condition: x > 0

2x - 4 = √x + 5

√x =2x - 4 - 5

√x =2x - 9 (²)

x = (2x - 9)²

x = 4x² - 36x + 81

4x² - 36x - x + 81 = 0

4x² - 37x + 81 = 0

Δ = -37² - 4.4.81 = 1369 - 1296 = 73

x = 37 ±√73/8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          

x' = 3.55

x" = 5.69

checking:

2*3.55 - 4 = 3.1

√3.55 + 5 = 6.88 Its not the same ∴ 3.55 is not a solution

2*5.69 - 4 = 7.39

√5.69 + 5 = 7.39 ∴ it's the only solution

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3 years ago
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