25% off means you are only paying 75% of the cost.
0.75(1100) = $825
A. -7/2
(1/4)^x+1=31
x+1=(-1/2)logbase2(31)-1
x=(-1/2)logbase2(31)-1
x=-3.5 or -7/2
The score that is one and a half standard deviation is 182.
The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:
![z=\frac{x-\mu}{\sigma} \\\\where\ x\ is\ raw\ score, \mu\ is\ mean, \sigma\ is\ standard \ deviation](https://tex.z-dn.net/?f=z%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%20%5C%5C%5C%5Cwhere%5C%20x%5C%20is%5C%20raw%5C%20score%2C%20%5Cmu%5C%20is%5C%20mean%2C%20%5Csigma%5C%20is%5C%20standard%20%5C%20deviation)
Given that:
μ = 140, σ = 28. For a z score of 1.5(one and a half):
![1.5=\frac{x-140}{28} \\\\x-140=42\\\\x = 182](https://tex.z-dn.net/?f=1.5%3D%5Cfrac%7Bx-140%7D%7B28%7D%20%5C%5C%5C%5Cx-140%3D42%5C%5C%5C%5Cx%20%3D%20182)
The score that is one and a half standard deviation is 182.
Find out more at: brainly.com/question/7449180
Answer:
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Step-by-step explanation: