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Mariana [72]
3 years ago
10

Suppose a principal amount of $2079 were invested into a simple interest account that pays an annual rate of 2.31% then the amou

nt of interest earned at the end of 14 years would be how much
Mathematics
1 answer:
Anna35 [415]3 years ago
4 0

Answer:

The amount of interest earned at the end of 14 years would be $672.3486

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

In this problem, we have that:

P = 2079, I = 0.0231, t = 14

So

E = 2079*0.0231*14 = 672.3486

The amount of interest earned at the end of 14 years would be $672.3486

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Describing Key Features of a Graph of a Polynomial Function:
Diano4ka-milaya [45]

<u>End behavior: </u>

The parent function is: f(x) = x³, which starts (from the left side) at -∞ and ends (on the right side) at +∞.

<u>Zeroes:</u>

f(x) = x³ + 2x² - 8x

0 = x³ + 2x² - 8x

0 = x(x² + 2x - 8)    

0 = x(x + 4)(x - 2)

0 = x         0 = x + 4         0 = x - 2

x = 0            x = -4              x = 2

<u>Intervals:</u>

Put the zeroes in order: -4, 0, 2

since f(x) is increasing from the left then the interval from -4 to 0 is positive and the interval from 0 to 2 is negative.

<u>Graph:</u>

see attachment



3 0
3 years ago
Read 2 more answers
Plz help me. I'm confused on hw​
r-ruslan [8.4K]
Answer: Yes by SAS

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Hope this helps :D
4 0
2 years ago
In order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estim
Sonja [21]

Answer:

Step-by-step explanation:

Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.

Std deviation =4.5 errors

95% confidence interval = Mean±1.96*std dev

Hence we have

1.96(\frac{4.5}{\sqrt{n} } )

\sqrt{n} \geq 4.41\\n\geq 19.4481

Sample size should be 20.

8 0
3 years ago
Expand and simplify: (-7y - 8) (y - 4)
ZanzabumX [31]
<h2><u>Simplification</u></h2>

<h3>Expand and simplify: (-7y - 8) (y - 4)</h3>

To expand an expression, use FOIL method.

<h3><u>F - First</u></h3>

  • Multiply the first term in each expression inside the parentheses.

<u>-7y</u> and <u>y</u> are the first terms in <u>each expression</u>.

<u>(-7y)(y) = -7y²</u>

<h3><u>O - Outside </u></h3>

  • Next is to multiply the terms outside. (The first term in the first expression and the last term in the second expression)

<u>-7y</u> is the first term in the <u>first expression</u>

<u>-4</u> is the last term of the <u>second expression</u>

<u>(-7y)(-4) = 28y</u>

<h3><u>I - Inside</u></h3>

  • The next step is to multiply the terms inside. (The last term in the first expression and the first term in the last expression)

<u>-8</u> is the last term in the <u>first expression</u>

<u>y</u> is the first term in the <u>second expression</u>

<u>(-8)(y) = -8y</u>

<h3><u>L - Last</u></h3>

  • Last step is to multiply the last term in each expression.

<u>-8</u> is the last term of the <u>first expression</u>

<u>-4</u> is the last term of the <u>second expression</u>

<u>(-8)(-4) = 32</u>

Combine all simplified terms.

  • -7y² + 28y - 8y + 32
  • -7y + 20y + 32

<u>Answer:</u>

  • <u>-7y + 20y + 32</u>

Wxndy~~

8 0
1 year ago
Miranda packed 19 glass ornaments into each box.she filled 5 boxes.what is the total number of ornaments in the boxes?
inna [77]
You have to take 19 and multiply it by 5 for each number of box.  Therefore 19x5 equals 95.  So 95 is your answer
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3 years ago
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