1. Which polynomial is equal to (4x^2 - 3x - 1)+(-3x^2 + 5x - 8)
1 answer:
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Answer:
Option 2: 1.5 is the correct answer.
Step-by-step explanation:
Given information is:
Mean = μ = $27
SD = σ = $5.50
A z-score simply tells us how far a selected data value from the mean is.
Z-score is denoted by z and is given by the formula:
Let x = $35.25
Putting the values of mean and SD we get,
The value of z-score for a price of $35.25 per barrel is 1.5
Hence,
Option 2: 1.5 is the correct answer.