exam Maths Puzzle Numerical Ability

Evaluate:
-5b^0 +(-1/3)^-2 +(2^-4/4^-1)

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exam Other Question

Round 436.93847 to the nearest thousandth. ok i dont know what categorey it goes in.. but i need help on changing trinomials into binomials.

I am a visual learner so please show me how to convert them.