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Andrej [43]
2 years ago
10

Don invests $12,000 into an account that pays 8.25% simple interest. How much interest does his account earn after 4 years?

Mathematics
1 answer:
pshichka [43]2 years ago
5 0

Answer:

$3960

Step-by-step explanation:

Given parameters:

Principal = $12,000

Simple interest  = 8.25%

Time  = 4yrs

Unknown:

Interest earned  = ?

Solution:

To solve this problem, we have to use the simple interest formula shown below:

 Simple interest  = \frac{PRT}{100}

P is the principal

R is the rate

T is the time

Now insert the parameters and solve;

  Simple interest  = \frac{12000 x 8.25 x 4}{100}   = $3960

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Given the scale is 1 cm to 25 km.

We have to find the length of the trail from centimeter to the nearest tenth of kilometer.

Let's take the length of the trail be x km.

The length of the trail given 7.2 cm. We will have to find the length in km.

We have to set it up as a proportion. So we can write the proportion as,

\frac{1}{25} = \frac{7.2}{x}

We have to cross multiply first. We will get,

(1)(x) = (7.2)(25)

x= (7.2)(25)

x = 180

So we have got the required length of the train in kilometer.

The actual length of the trail = 180km.

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3 years ago
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it is up

Step-by-step explanation:

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In Exercise,find the balance in the account after 10 years.
djverab [1.8K]

Answer: The balance in the account after 10 years is $3374.65

Step-by-step explanation:

The exponential equation for growth [ compounded continuously] is

y=pe^{rt}

, where P= Present value

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t= time (years)

By considering the given information , we have

p=$2500  r = % =0.03  and t= 10

Substitute all the values in the above equation , we get

y=2500e^{0.03(10)}

y=2500e^{0.3}

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Answer:

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Step-by-step explanation:

5<2x-1<9

Add 1 on all the sides because of the inverse operation.

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3 years ago
Can someone please help me Please I'm desperate
Yuri [45]

Answer:

James is 37, Rob is 44, and Kate is 35

Step-by-step explanation:

Set up an equation where x is James' age:

Rob's age can be represented by x + 7, since he is 7 years older than James

Kate's age can be represented by x - 2, since she is 2 years younger than James

Add these together in the equation and set it equal to 116:

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