6.4 is the answer to your question
Answer:

Step-by-step explanation:
16 = a^2 + b^2
16 - a^2 =b^2
4^2 - a^2 = b^2


It is given that the sample size is 17.
So degrees of freedom is 16.
The confidence level is 80%.
Use the t table or a tool to find the critical t value as below:
The one tail t value for 80 percent confidence is 0.865 using t table.
So the critical value is 0.865.
Answer: I think it would be a 50/50 chance of getting 2 even numbers.
Answer:
Prime factorization of 525 is 3×5×5×7