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Answer:
4.5 times 10 Superscript negative 3
Explanation:
In scientific notation, the decimal is always after the first number so 14.5 times 10 Superscript 2 and 0.78 times 10 Superscript negative 6 is eliminated.
In scientific notation.=, the subscript is always 10 so 5.7 times 4 Superscript 8 is eliminated which leaves you with4.5 times 10 Superscript negative 3.
20 x 9 + 25^6 / 27 - 5^4
20 x 9 + 244140625 / 27 - 625
180 + 244140625 / 27 - 625
244140805 /- 598
= -408262.215719