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gulaghasi [49]
3 years ago
9

After inheriting some money, a woman wants to invest enough to have an annual income of $5,000. If she can invest $20,000 at 9%

annual interest, how much more will she have to invest at 7% to achieve her goal? (See the table. Round your answer to the nearest cent.)
Mathematics
1 answer:
algol133 years ago
7 0

Answer:

I hope that the answer I give you is correct. Doing my best to help.

Step-by-step explanation:

Assuming this is simple interest (non-compounding), if the woman invests $20000 at 9%/year, she will earn

i = prt

i=20000 * .09 * 1

i=1800

so for the woman to supplement that $1800 to $5000, she will need to get a return of $3200 in her second investment invest at 7%/year.

i = prt

3200 = p * .07 * 1

3200/.07 = p

45714.28 = p

I hope this is correct, or at least sends you on the way to the correct answer.

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5 0
3 years ago
A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national
Ksju [112]

Answer:

n≅376

So sample size is 376.

Step-by-step explanation:

The formula we are going to use is:

n=pq(\frac{z_{\alpha/2}}{E})^{2}

where:

n is the sample size

p is the probability of favor

q is the probability of not in favor

E is the Margin of error

z is the distribution

α=1-0.98=0.02

α/2=0.01

From cumulative standard Normal Distribution

z_{\alpha/2}=2.326

p is taken 0.5 for least biased estimate, q=1-p=0.5

n=0.5*0.5(\frac{2.326}{0.06})^{2}\\n=375.71

n≅376

So sample size is 376

4 0
3 years ago
Solve the following equation algebraically: x^2=20
Zielflug [23.3K]

Answer:

x = ± 2\sqrt{5}

Step-by-step explanation:

Given

x² = 20 ( take the square root of both sides )

x = ± \sqrt{20} = ± \sqrt{4(5)} = ± 2\sqrt{5}

6 0
3 years ago
Read 2 more answers
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frozen [14]

Answer:

x must equal 0 or - 10

and y must equal 1 or 6

so its 3 x 0 = 0 plus 6 x 1 = 6

or 3 x -10 = -30 plus 6 x 6 = 36 so -30 plus 36 is 6

Step-by-step explanation:

3 0
2 years ago
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Answer:

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Step-by-step explanation:

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