exam Maths Puzzle Numerical Ability

please help me simplify

5^5 square root of -32

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exam Other Question

Multiply using vertical method

(m^2-5mn+3n^2)(m^2+4mn-2n^2)
Landscaping: at an excavation site a conical pile of earth 9 ft high and 14 ft in diameter at the base must be hauled away by a small truck with a capacity of 2.6 cu yd. How many truckloads will it take to transport the soil? Be careful with units.