exam Maths Puzzle Numerical Ability

Two Groups of hikers leave from the same base camp and lead in opposite directions. The first group walks 4.5 miles due east, then changes directions and walks east 45 degrees Nort

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Simplify

(20 x 10 -4 power)(4 x 10 9th power)/3,200 x 10 -3 power
write the inequality in words:3n less than 52