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olasank [31]
3 years ago
7

Elena is thinking about putting $200 in a savings account that earns 4% interest compounded semiannually. She wants to keep that

money in the account for 4 years. Which of the formulas below can help her calculate how much money she will have at the end of the 4 years?
Mathematics
2 answers:
Bogdan [553]3 years ago
7 0
600 i  think i dont know i just want some point dont mind me
Bas_tet [7]3 years ago
3 0

Answer: The required formula is,

200(1+0.02)^8

Step-by-step explanation:

Here, the principal amount, P = $ 200,

Annual rate of interest, r = 4 %,

Time, t = 4 years,

Number of periods in one year( semiannual in one year ), n = 2

Thus, the amount after 4 years, compounded semiannually is,

A=P(1+\frac{r/n}{100})^{nt}

=200(1+\frac{4/2}{100})^{2\times 4}

=200(1+\frac{2}{100})^8

=200(1+0.02)^8

Which is the required formula.

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Step-by-step explanation:

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8760 x 0.6

This gives us an answer of 5256 which is the number of orbits per year

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Plot the zeros of this function:<br><br> f(x) = (x – 1)(x – 7).
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Answer:

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Step-by-step explanation:

The zeros of a function is where the function crosses the x-axis. The x-intercepts are the zeros of a function.

f(x) = (x - 1)(x - 7)

Let output equal to 0.

0 = (x - 1)(x - 7)

Set factors equal to 0.

x-1=0\\x=1

x-7=0\\x=7

The zeros of the function are x=1 and x=7.

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Four times a number added to 3 times a larger number is 31. Seven subtracted from the larger number is equal to twice the smalle
Rus_ich [418]

Answer:

y = negative four-thirds x + StartFraction 31 Over 3 EndFraction

y = 2 x + 7

Step-by-step explanation:

Let x represent the smaller number and y represent the larger number.

<h2><u /></h2><h2><u>Part 1</u></h2>

Four times a number added to 3 times a larger number is 31.

<u>It is translated as:</u>

  • 4x + 3y = 31

<u>Then, solving for y:</u>

  • 4x + 3y=31 ⇒ 3y= -4x+31 ⇒ y= (-4x+31)/3 = - 4/3x + 31/3

    ⇒  y= - 4/3x + 31/3

<u>Correct answer choice for this equation:</u>

y = negative four-thirds x + StartFraction 31 Over 3 EndFraction

<h2><u>Part 2 </u></h2>

Seven subtracted from the larger number is equal to twice the smaller number.

<u>It is translated as:</u>

  • y-7= 2x

<u>Then, solving for y:</u>

  • y-7= 2x ⇒ y= 2x+ 7

<u>Correct answer choice for this equation:</u>

y = 2 x + 7

4 0
3 years ago
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