Which quotient will be negative? 36 ÷ (-4) 40 ÷ 8 -42 ÷ (-7) 12 ÷ 4
1 answer:
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Answer:
d) A = π()
Step-by-step explanation:
area = π
diameter = 18
radius (half of diameter) = 9
area = π
Answer: 169.2 per acre are produced if a field is in the top 25%.
Step-by-step explanation:
Given: The mean rain-fed corn yield of harvested fields are normally distributed, produce 147.2 bushels per acre with a standard deviation of 33 bushels per acre.
Let X denote the mean rain-fed corn yield of harvested fields.
Let x denotes the number of bushels per acre are produced if a field is in the top 25%.
Top 25% on a density curve means , (100-25%)i.e. 75% area lies below x.
I.e.
.
Z-score for p-value of 0.75 (one tailed)=0.67 [By z-table]
Then,
Here approx value is 169.2 (from options).
So, 169.2 per acre are produced if a field is in the top 25%.