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.