ACT 2011 April(67F) Math Question 8 Explanation - ACT Helper

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2011 April(67F) Math Question 8
Exponents, Radicals, & Scientific Notation
- Exponent Expressions
Choice J
$$3x^{5}\cdot7x^{9}=(3\cdot7)(x^{5}\cdot x^{9})$$ $$=21x^{14}$$
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