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gtnhenbr [62]
2 years ago
6

A plot of land is a pentagon with vertices Q(-4, 4), R(2, 4), S(4, 1), T(2, -4), and U(-4, -4).

Mathematics
1 answer:
My name is Ann [436]2 years ago
8 0
The measure of QR is 6 units, which is 6 meters, since every unit on the coordinate grid is 1 meter.
The measure of UT is also 6 meters.
The measure of QU is 8 meters.
To find the measure of RS, we use the distance formula:
\sqrt{(x_{2}-x_{1})^2 + (y_{2}-y_{1})^2}
We substitute the coordinates of R and S into the formula and have:
\sqrt{(2-4)^2+(4-1)^2} \\ =\sqrt{(-2)^2 + (3)^2} \\ =\sqrt{4+9} \\=\sqrt{13} \\=3.61
To find the measure of ST we use the distance formula again, substituting the coordinates for S and T into the formula:
\sqrt{(4-2)^2+(1--4)^2} \\=\sqrt{(2)^2 + (1+4)^2} \\=\sqrt{4+5^2} \\=\sqrt{4+25} \\=\sqrt{29} = 5.39
Now we find our perimeter by adding the sides together:  5.39 + 3.61 + 6 + 6 + 8 = 29 meters
Since fencing costs $24.75 per meter, we multiply this by our perimeter:
29(24.75) = $717.75 
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We want to find how long it will take for there to be 1310 bacteria present.

1310=720e^{0.0267t}

\frac{1310}{720}  =  {e}^{0.0267t}

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0.59853= {0.0267t}  \\ t =  \frac{0.59853}{0.0267}

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You are given following <u>data</u>:

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