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2 years ago

13

Sam opened a money account that pays 3 % simple interest. He started the account with 7000$ and made no further deposits. When h

e closed the account, he had earned 1,050$ in interest. How long did he keep his account open?

1 answer:

Novosadov [1.4K]2 years ago

8 0

He kept his account open for 3 years

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a local parts shop buys a machine that costs $500,000. its value depreciates exponentially each year by 10%. what is the machine

jeka94

Hello!

Answer:

$295.295

Explanation:

Of the statement, we have that the price of the machine decreased 10% every year exponentially, so in the first year it real value drops to 90% of the costs. For 5 years, It can be expressed and simplified by the following equation:

We can't use that the percent drop as a percent itself, so we are going to divide 90% by 100%, and it will give us an entire number.

$\frac{90}{100}=0,9 \\ \\ Value=Costs.(0.9)^{years}$

By substituting we have:

$Value=500000.(0.9)^{5}$

Value: $295.245

Have a nice day!

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2 years ago

8 ft 6 inches is greater or less than 100 inches?

Romashka [77]

It would be greater, because 1 foot is equal to 12 inches. 8 times 12 is 96. Then 96 plus 6 inches in 102. So it would be greater.

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3 years ago

A group of people were given a personality test to determine if they were Type A or Type B. the results are shown below Type A M

FinnZ [79.3K]

Answer:

Below<3

Step-by-step explanation:

Type a : 55 75

Type b:48 22

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2 years ago

Sue initially has 5 hours of pop music and 4 hours of classical music in her collection. Every month onwards, the hours of pop m

Snezhnost [94]

<h2>Answer</h2>

f(x) = 5(1.25)x + 4

<h2>Explanation</h2>

To solve this, we are going to use the standard exponential equation:

$f(x)=a(1+b)^x$

where

$a$ is the initial amount

$b$ is the growth rate in decimal form

$x$ is the time (in months for our case)

Since the hours of classic music remain constant, we just need to add them at the end. We know form our problem that Sue initially has 5 hours of pop, so $a=5$ ; we also know that every month onward, the hours of pop music in her collection is 25% more than what she had the previous month, so $b=\frac{25}{100} =0.25$ . Now let's replace the values in our function:

$f(x)=a(1+b)^x$

$f(x)=5(1+0.25)^x$

$f(x)=5(1.25)^x$

Now we can add the hours of classical music to complete our function:

$f(x)=5(1.25)^x+5$

6 0

3 years ago

Read 2 more answers

A car manufacturer produced 5,000 cars for a limited edition model. Dealers sold all of these cars at mean price

Alona [7]

Answer:

<h3>μₓ = 36,000 dollars</h3><h3>σ ₓ= 1,000 dollars</h3><h3 /><h3>Show work:</h3>

to find μₓ = 36,000 dollars:

Look in the question, it states that the mean is $36,000.

to find σ ₓ= 1,000 dollars:

<h3> $\frac{3000}{\sqrt{9} } = 1000$ </h3>

3 0

2 years ago