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AlekseyPX
3 years ago
11

NEED HELP ASAP!!!!PLS!!! What is the area of the shaded region?

Mathematics
1 answer:
Mandarinka [93]3 years ago
3 0
The figure shows two triangles. To find the the area of the shaded region, you have to substract the area of the larger triangle by the area of the smaller:

 1. Area of the larger triangle:

 A1=bxh/2

 b=5 mm

 h=2mm+4mm+6mm=12 mm

 Then:

 A1=5 mmx12mm/2
 A1=30 mm²

 2. The area of the smaller triangle, is

 A2=bxh/2

 b=3 mm
 h=4 mm

 Then, you have:

 A2=3 mmx4 mm/2
 A2=6 mm²

 3.<span> The area of the shaded region is:

 A3=A1-A2
 A3=30 mm</span>²-6mm²
 A3=24 mm²

 4. Therefore, the answer is: 24 mm²
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She needs to sample 189 trees.

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The standard deviation of the population is 70 peaches per tree.

This means that \sigma = 70

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She needs to sample n trees.

n is found when M = 10. So

M = z\frac{\sigma}{\sqrt{n}}

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She needs to sample 189 trees.

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