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OLEGan [10]
3 years ago
8

Carleen deposited $16,400 in a bank account with an annual interest rate of 3.9%. How much interest was earned in 8 years?

Mathematics
2 answers:
Nesterboy [21]3 years ago
6 0

The amount on interest he earned is $5116.8

Step-by-step explanation:

Given,

Principal(P) = $16400

Rate of interest(R) = 3.9%

Time(T) = 8 years

To find the interest

Formula

Simple interest = \frac{PRT}{100}

Hence,

The interest =$ \frac{16400X3.9X8}{100}

= $5116.80

VikaD [51]3 years ago
3 0

Answer:

$5116.8

Step-by-step explanation:

Interest = PRT/100

Where

P = principal

R = rate

T = time

Given

P = $16400

R = 3.9% and

T = 8 years

Interest = $16400 x 3.9 x 8 /100

The zeros cancel out

We’re left with

Interest = 164 x 3.9 x 8

= $5116.8

$5116.8 interest was earned after 8 years

Interest =

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klemol [59]

Answer:

Part 1) f(x)=\frac{x+4}{x} -----> x\neq 0

Part 2) f(x)=\frac{x}{x+4} ----> x\neq -4

Part 3)  f(x)=x(x+4) ----> All real numbers

Part 4) f(x)=\frac{4}{x^2+8x+16} ----> x\neq -4

Step-by-step explanation:

we know that

The domain of a function is the set of all possible values of x

Part 1) we have

f(x)=\frac{x+4}{x}

we know that

In a quotient the denominator cannot be equal to zero

so

For the value of x=0 the function is not defined

therefore

The domain is

x\neq 0

Part 2) we have

f(x)=\frac{x}{x+4}

we know that

In a quotient the denominator cannot be equal to zero

so

For the value of x=-4 the function is not defined

therefore

The domain is

x\neq -4

Part 3) we have

f(x)=x(x+4)

Applying the distributive property

f*(x)=x^2+4x

This is a vertical parabola open upward

The function is defined by all the values of x

therefore

The domain is all real numbers

Part 4) we have

f(x)=\frac{4}{x^2+8x+16}

we know that

In a quotient the denominator cannot be equal to zero

so

Equate the denominator to zero

x^2+8x+16=0

Remember that

x^2+8x+16=(x+4)^2

(x+4)^2=0

The solution is x=-4

so

For the value of x=-4 the function is not defined

therefore

The domain is

x\neq -4

6 0
3 years ago
Your allowance increases by $2 every month. You started earning $20 per month. Write a formula to find how much allowance you wi
NemiM [27]

Answer:

$20 +$2n

Step-by-step explanation:

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3 years ago
Choose the equations that are equvialent. Select all that apply.
Fed [463]

Answer:a,b,c

Step-by-step explanation:

The are all equivalent

6 0
3 years ago
Which is the answer for -1/3y + 4 = 3
N76 [4]

2/1

Step-by-step explanation:

_1/3y=_1

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y=2/1

4 0
3 years ago
A certain genetic condition affects 8% of the population in a city of 10,000. Suppose there is a test for the condition that has
enot [183]

Solution:

Population in the city= 10,000

As genetic condition affects 8% of the population.

8 % of 10,000

=\frac{8}{100}\times 10,000=800

As, it is also given that, there is an error rate of 1% for condition (i.e., 1% false negatives and 1% false positives).

So, 1% false negatives means out of 800 tested who are found affected , means there are chances that 1% who was found affected are not affected at all.

So, 1% of 800 =\frac{1}{100}\times 800=8

Also,  1% false positives means out of 10,000 tested,[10,000-800= 9200] who are found not affected , means there are chances that 1% who was found not affected can be affected also.

So, 1% of 9200 =\frac{1}{100}\times 9200=92

1. Has condition Does not have condition totals  = 800

2. Test positive =92

3. Test negative =8

4. Total =800 +92 +8=900

5. Probability (as a percentage) that a person has the condition if he or she tests positive= As 8% are found positive among 10,000 means 9200 are not found affected.But there are chances that out of 9200 , 1% may be affected

=\frac{\text{1 percent of 9200}}{9200}\\\\ \frac{\frac{1}{100}\times 9200}{9200}=\frac{92}{9200}\\\\ =0.01

that is Probability equal to 0.01 or 1%.

7 0
3 years ago
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