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He Needs 3 More Inches Because 16 Feet Converted Into Inches Is 192 Inches. If You Do 192 - 189 You Have 3 Left Over. Therefore He Needs 3 More Inches To Pull Vault Over A Bar That Is 16 Feet High
It’s s=-2 and s=2 because the absolute value makes both of the numbers be positive so either way it’s going to be 2+4=6
You use lots and lots of math.
The answer to this equation is 1/2