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Sliva [168]
3 years ago
14

Mr.Beard bought 10 acres of land.She plans to divide the land into smaller lots that are each 1/20 of an acre. How many smaller

lots will she have?
Mathematics
1 answer:
Tasya [4]3 years ago
7 0

Answer:

200 smaller lots

Step-by-step explanation:

10 ÷ 1/20 = 200

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The diameters of ball bearings are distributed normally. The mean diameter is 87 millimeters and the standard deviation is 6 mil
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Answer:

69.14% probability that the diameter of a selected bearing is greater than 84 millimeters

Step-by-step explanation:

According to the Question,

Given That, The diameters of ball bearings are distributed normally. The mean diameter is 87 millimeters and the standard deviation is 6 millimeters. Find the probability that the diameter of a selected bearing is greater than 84 millimeters.

  • In a set with mean and standard deviation, the Z score of a measure X is given by Z = (X-μ)/σ

we have μ=87 , σ=6 & X=84

  • Find the probability that the diameter of a selected bearing is greater than 84 millimeters

This is 1 subtracted by the p-value of Z when X = 84.

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⇒1 - 0.30854 = 0.69146

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