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Taya2010 [7]
3 years ago
5

The perimeter of a rectangular field is 580 yards. The length is 30 yards more than the width. Find the length and width of the

field (in yards).
Mathematics
1 answer:
aliya0001 [1]3 years ago
6 0

2 L + 2 W = 580

W = L - 30

2( L - 30) + 2 L =580

2L - 60 + 2 L =580

4 L = 640

L = 160

W = 160-30= 130

160 × 2 + 130 × 2 = 580

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The formula of margin error is, E = z√((p-vector)(1 - (p-vector)) ÷ n)

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Now, the proportion is not given so adopt nominal (p-vector) = 0.05

The critical value at CL of 90% is 1.645.

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