exam Maths Puzzle Numerical Ability

Please can someone walk me through factoring this polynomial?

Factor completely

64x^3-27

Thank you

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exam Other Question

help solve.

earned $12,000 last year. He invested part at 3% simple interest and the rest at 4%. in one year, he earned a total of 440.00 in interest. How much did he invest at Heres the question:
A farmer wants to buy 100 animals for $100.00 (must buy at least one of them)

Horses-$5.00
Cows-$3.00
Chicks-.50

How many horses,cows and chicks does the farmer need to have 100 and 100.00?