exam Maths Puzzle Numerical Ability

This is not from a textbook. I do not understand the AND / OR in the following equations:

4x-6_>2 AND 5x-4>21 _> is less than or equal to

2-4x<6 OR 3-x>9

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exam Other Question

Multiply and simplify - 6b^4/11p^2 x 121p^4/36b. I have gotten so far, 726b^4p^4/396p^2b and then I am stuck. How do I complete this? This question is from a skill check for my Algebra 114 class 2(8x+2)=3(2x-7)