exam Maths Puzzle Numerical Ability

cube root of 175/cube root of 50

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exam Other Question

I need to rewrite the expression with positive exponents.
1/2x^-2y^-3

Simplify the expression. The simplified expression should have no negative exponents.
(2x^3y^2/3xy)^-3

Please help! Two trains leave the same station heading in opposite directions, each at 10 miles per hour. After 1/2 hour they each turn left and continue on at 5 miles per hour for 2 hours. At that point how far apart are they?