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Sliva [168]
3 years ago
11

Kelly earns $178.50 in interest on an account that earns simple interest at a rate of 4%. If she kept the money in the account f

or 5 years, how much was the principle amount?
Mathematics
1 answer:
Otrada [13]3 years ago
7 0

Answer:

  $892.50

Step-by-step explanation:

The amount of interest earned is given by ...

  I = Prt

Filling in the given values, we have ...

  $178.50 = P·0.04·5

Dividing by 0.20 gives ...

  $178.50/0.20 = P = $892.50

The principal amount in Kelly's account is $892.50.

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This month the Middle School Media newspaper has 25 pages. Twenty-five schools order the paper for each of their students. Each
musickatia [10]

Answer:

25^4

Step-by-step explanation:

Here, we want to find the expression that shows the total number of pages in all of the news papers

Number of pages per book = 25

Number of schools is 25

Number of classrooms is 25

Number of students per classroom is 25

Now; the number of students in each school

is 25 * 25

Number of students in all of the school will be;

25 * 25 * 25

So the number of pages in all of the schools will be;

25 * 25 * 25 * 25 = 25^4

7 0
3 years ago
the hardware store where you work charges $.80 including tax, for a pound of nails. a customer purchases 5 3/4 pounds of nails.
ahrayia [7]
.80 x 5.75 = $4.6

hope this helps
4 0
4 years ago
Gerald borrowed $750 at 7% simple interest to be paid back in 2 years. How much interest will he pay?
Lisa [10]

Answer:

$105 interest

Step-by-step explanation:

S.I=\frac{PRT}{100}

S.I= \frac{750*7*2}{100}

Interest = $105

5 0
3 years ago
The density of oxygen is 0.001429 grams per cubic centimeter. How is this number written in
Anika [276]

We have been given that the density of oxygen is 0.001429 grams per cubic centimeter. We are asked to write the given number in scientific notation.

To convert a number into scientific notation, we write the given number as product of two numbers. One factor is a number between 1 and 10, while the 2nd factor is power of 10.  

When a decimal is to the left of given number, then we need to move the decimal to right such that the number gets between 1 and 10. Then, we multiply the number by negative power of 10 that many times, we moved the decimal to right.    

We can see that decimal is to left of our number. To place decimal after 1, we have to multiply 10 to 3 times. To keep the value of number same we will multiply the same negative power (negative 3).

0.001429\times 10^3\times 10^{-3}

(0.001429\times 10^3)\times 10^{-3}

(1.429)\times 10^{-3}

1.429\times 10^{-3}

Therefore, the number 0.001429 will be 1.429\times 10^{-3} in scientific notation.

7 0
4 years ago
A $170.00 item is marked down by 10%.
kotykmax [81]

Answer:

The new price is $153

Step-by-step explanation:

10% 0f 170 is 17

170-17=153

8 0
3 years ago
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