Answer:
-0.91
Step-by-step explanation:
The z score formula is given as:
z = (x-μ)/σ, where
x is the raw score = 15 minutes
μ is the population mean = 17 minutes
σ is the population standard deviation = 2.2 minutes
z = 15 - 17/2.2
z = -2/2.2
z = -0.90909
Approximately = -0.91
The z-score for this amount of advertising time is -0.91
Answer:
2
Step-by-step explanation:
If a field is 900 meters squared and one side is twice as big as the other how big is each side
t + 7 = 21
---Subtract 7 from both sides
t + 7 - 7 = 21 - 7
t = 14
Hope this helps!! :)