brookieharrisop5n7us

07.11.2019 • 

Mathematics

3. last year, the numbers of skateboards produced per day at a certain factory were normally distributed with a mean of 20,500 skateboards and a standard deviation of 55 skateboards.
(a) on what percent of the days last year did the factory produce 20,555 skateboards or fewer?
(b) on what percent of the days last year did the factory produce 20,610 skateboards or more?
(c) on what percent of the days last year did the factory produce 20,445 skateboards or fewer?

Ответ:

shrinu

09.01.2022

Mathematics

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Let x be a random variable representing the number of skateboards produced
a.) P(x ≤ 20,555) = P(z ≤ (20,555 - 20,500)/55) = P(z ≤ 1) = 0.84134 = 84.1%

b.) P(x ≥ 20,610) = P(z ≥ (20,610 - 20,500)/55) = P(z ≥ 2) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275 = 2.3%

c.) P(x ≤ 20,445) = P(z ≤ (20,445 - 20,500)/55) = P(z ≤ -1) = 1 - P(z ≤ 1) = 1 - 0.84134 = 0.15866 = 15.9%

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Ответ:

ortegaly000

02.10.2022

Mathematics

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m < 4 = 34 degrees

Step-by-step explanation:

Because:-

m < 4 = m <2  ( opposite angles are equal  ) I think they are called  vertical angles in the US.

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