I only did the first part but maybe later I will solve the rest too. If there are any errors but tell me so I can update the pic.
Hey!
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Solution:
The ratio is FEMALES to MALES.
So its 18/16, 18:16, or 18 to 16.
~Now we need to simplify.
18:16 → 18/2:16/2 → 9:8
*Note* When you have a ratio you need to know which comes first. If you put males to females that incorrect. It has to be correct according to the question.
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Answer:

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Hope This Helped! Good Luck!
All real numbers greater than or equal to 1
The formula for the area of a circle is Area = PI x r^2
Area = 3.142 x 11.2^2
Area = 394.13 square cm.
Well, before you draw out the first sock, you had 60% chance of getting a white sock since six of the ten socks are white! (6/10)
So, if you were to not replace the first drawn white sock, your percentage goes to 55.5556%! This is because you now have 5/9 socks remaining in the drawer being white!