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2 years ago

How to solve this -13=r/9 +8

Mathematics

1 answer:

yulyashka [42]2 years ago

6 0

Answer:

r=-189

Step-by-step explanation:

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Answer:

Option E) 61.6

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 100 bushels per acre

Standard Deviation, σ = 30 bushels per acre

We assume that the distribution of yield is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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We have to find the value of x such that the probability is 0.90

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$P( X > x) = P( z > \displaystyle\frac{x - 100}{30})=0.90$

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Calculation the value from standard normal table, we have,

$P(z$

$\displaystyle\frac{x - 100}{30} = -1.282\\x = 61.55 \approx 61.6$

Hence, the yield of 61.6 bushels per acre or more would save the seed.

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