If you randomly purchase one item, the probability it will last longer than 9 years is; 11.12%
<h3>How to find the probability from z-score?</h3>
The formula for Z-score is;
z = (x' - µ)/σ
where;
x' = sample mean
µ = population mean
σ = standard deviation
Thus;
z = (9 - 7.9)/0.9
z = 1.22
From online p-value from z-score calculator, we have;
probability = 0.1112 = 11.12%
Read more about Z-score probability at; brainly.com/question/25638875
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Ok... In order to do question #2 you have to use the formula to find volume of a cube, which is V= a^3 ( a stands for edge length). From what the problem mentions, the volume must be 1.5^3= 3.38 cubic feet. The next and final approach to the problem is how much will it cost to fill the pot. So if 1 or per cubic foot is $4 then 3.38 cubic foot will be 3.38 times 4 which is $13.58. Hope it helped you.
Answer:
d
Step-by-step explanation:
it only makes sense as a one to one function