book Maths Puzzle Numerical Ability

Write these four values form lowest to highest. -3, 3 1/2, 3.2, -5

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book Other Question

I am really NO GOOD at word problems...HELP!! :)

A 6-foot pole casts a shadow of 9 feet. How tall is a tree with a shadow of 3 feet?

Thanks My question says to simplify the radicals.

(square root of 6+3 square root of 3)(6+3 square root of 3)

Could you help me with this? thanks!