Mara found the length of time of an investment. The principal of the investment was $4,300, the interest rate was 6.2 percent, and the interest was $2,666. Mara made an error in her work. I = p r t. 2666 = (4300) (0.062) t. 2666 = (266.6) t. Start Fraction 266.6 over 2666 End Fraction = t. 0.1 = t. What was Mara’s error?

Step-by-step explanation:

Since we have given that

Principle of investment= $4300

Interest rate = 6.2% p.a

So, the interest made is given by

[tex]6.2\%\text{ of }4300\\\\=\frac{6.2}{100}\times 4300\\\\=\$266.60[/tex]

The error was that Mara divided 6.2 by 10 instead of dividing by 100.

So, she made a mistake.

Error margin is given by

[tex]2666-266.60\\=2399.4[/tex]

$266.60

Step-by-step explanation:

Mara did not divide correctly

Step-by-step explanation:

She had to divide 2666 by 266.6 which should have given her 10

Mara did not divide correctly

Step-by-step explanation:

I = p r t

P = 4300

r = 6.2 % = 0.062

t = ?

I = 2666

=> 2666 = 4300 (0.062) * t

Mara substitute the values from the problem into the formula correctly

=> 2666 = 266.6 * t

Mara multiply correctly

=> 2666/266.6 = t ( but Mara Wrote 266.6/2666 = t)

hence Mara Did not divided correctly

=> 10 = t

Mara Did not divided correctly

Learn more:

In class, Julie was asked to create a scenario for the linear function ...

she did not divide correctly

Step-by-step explanation:

just did the test got it right

Well, 6.2% of 4,300 can't be over half. she has made a calculation error, and the real answer is (this is where the mistake was made) 4,300 * 0.062 (not 6.2, because percents are always divided by 100 to make them into a usable number), which is equal to $266.60.

Mara did not divide correctly

Step-by-step explanation: