Dream Loan Bank offers loans. Carrie borrows $10,500 to help start a business. The loan must be repaid at 4.5% simple interest o

ver 10 years.
How much money will Carrie have to pay back?

Enter the correct answer in the box.

Mathematics

1 answer:

MaRussiya [10]2 years ago

7 0

$~~~~~~ \textit{Simple Interest Earned Amount}\\\\A=P(1+rt)\qquad\begin{cases}A=\textit{accumulated amount}\\P=\textit{original amount given}\dotfill & \$10500\\r=rate\to 4.5\%\to \frac{4.5}{100}\dotfill &0.045\\t=years\dotfill &10\end{cases}\\\\\\A=10500(1+0.045\cdot 10)\implies \boxed{A=15225}$

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A solar collector is 2,0 m long by 1,5 m wide. It is held in place

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Answer:

The width of the frame is 0.0746 meters

Step-by-step explanation:

We are told that after the frame has been attached to the solar collector, the area that is left exposed is $2.5m^2$ . As we see in the figure, the dimensions of this area are

$(w-2x)$ and $(l-2x)$

where $x$ is the width of the frame.

The product of these dimensions must equal the exposed area:

$(w-2x)(l-2x)=2.5m^2$

Now since $w=1.5m$ and $l=2m$ we have:

$(1.5-2x)(2-2x)=2.5$

we expand this and solve for x using the quadratic formula:

$4x^2-7x+3=2.5$

$4x^2-7x+0.5=0$

we get two solutions:

$x=1.6753$

$x=0.0746$

We take the second solution i.e $x=0.0746$ , because first one gives a width larger than the dimensions of the solar collector which cannot be possible.

Thus the width of the frame is 0.0746 meters.