Answer:
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Step-by-step explanation:
Bedroom 1: 22x15=330
330x7.25=2392.5
Bedroom 2: 15x12=180
180x7.25=1305
Bedroom 3: 13x12=156
156x7.25=1131
2392.5+1305+1131= 4828.5
Bedroom 1: 22x15=330
330x6.75=2227.5
Bedroom 2: 15x12=180
180x6.75=1215
Bedroom 3: 13x12=156
156x6.75=1053
2227.5+1215+1053+100= 4595.5
Therefore, 6.75 per square foot plus a $100 fixed installation fee would be the cheapest.
$160 + $12.50= $172.50
$215 - $172.5= $42.50
Your answer is $42.50
Answer:

Step-by-step explanation:
Given
--- Population
-- Mean
--- Standard deviation
-- Sample
Required: 
This question will be solved using the finite correction factor
First, calculated the z score






So:

Using z table

