exam Maths Puzzle Numerical Ability

Can someone please help me with this problem??
Simplify the expression; assume that all the variables represent positive numbers.
(625x^4y)^1/4
______________
(16xy^3)3/4

Thank You so much

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exam Other Question

Explain permutations and combinations and the difference between the two. Use examples to illustrate. Mrs. Martinez is buying a sweater that is on sale for 25% off of the original price. She has a coupon that gives her an additional 20% off of the sale price. Her final purchase price is what percent of the original price?