Express 420 as a product of its prime factors.

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23 × 5 × 3 × 7

2 × 5 × 3 × 7

22 × 5 × 3 × 7

22 × 52 × 3 × 7

answer is C.

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Detailed Solution

Given the integer 420.
To determine a number's prime factorization, first identify the factors that together make up the original number.
geogebra-export (11)

420 = 22 × 5 × 3 × 7

Therefore prime factorization of 420 is

22 × 5 × 3 × 7

.
Hence the correct option is 3.

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