Answer: Wai's hole is 6 inches deeper. (-6)
Step-by-step explanation:
15 minus 9 is equal to 6 so the difference is negative 6 inches
Step-by-step explanation:
The answer for third is D, you have multiple choice in fourth which I can't see at all...
Answer: The percentile is 89
Step-by-step explanation:
This question can be solved using concept for t tables
In a normal distribution the curve. 
The relationship between z score, mean and standard deviation is given by

So the z value according to this is given by the formula

From the z table we can infer that p value for z=+1.217 is 88.82
So 1750 is 89th percentile
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