Respuesta :

MaddieMathy
Let's use the equation I=prt (Interest= principle *rate* time

Alright. We don't yet know the interest, so we can leave that as i.

We know the principle is 4,200 dollars, since that is the starting amount of money, so let's fill that in for p.

We know the rate is 12 percent, so let's fill that in for r.

We know the time is 3 months, which is 3/12 of a year, so let's fill that in for t.

So far we have I=4,200*0.12* 3/12

Let's solve for I

I got 126.

Let's add that to the original amount (4,200+126)

Your final answer should be he owes 4,326 dollars.

Don't sorry about the following text, it won't come off my screen
Going to this in comments because my keyboard is covering the answer, so sorry!

The total amount that must be repaid in [tex]3[/tex] months for the principal of [tex]\$4200[/tex] and simple rate of interest [tex]12\%[/tex] is equal to [tex]\$4326[/tex].

What is amount?

" Amount is defined as the total sum of the given quantity."

Formula used

Simple Interest [tex]= \frac{P\times R\times T}{100}[/tex]

[tex]P =[/tex]Principal

[tex]R=[/tex]Rate of interest

[tex]T =[/tex]time taken

Total amount = Principal + Simple interest

According to the question,

Given,

Principal [tex]'P' = \$4200[/tex]

Rate of interest [tex]= 12\%[/tex]

Time taken [tex]= 3[/tex] months

                   [tex]= \frac{3}{12}[/tex] years

Substitute the value in the formula to get simple interest,

Simple interest [tex]= \frac{4200 \times 12\times 3}{12 \times 100}[/tex]

                          [tex]= 42\times 3\\\\= \$126[/tex]

Substitute the value in the formula to get total amount,

Total amount [tex]= \$ ( 4200 + 126)[/tex]

                      [tex]= \$ 4326[/tex]

Hence, the total amount that must be repaid in [tex]3[/tex] months for the principal of [tex]\$4200[/tex] and simple rate of interest [tex]12\%[/tex] is equal to [tex]\$4326[/tex].

Learn more about amount here

brainly.com/question/13024617

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