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scoray [572]
3 years ago
6

Multiply (1.2 ⋅ 1028) ⋅ (3 ⋅ 10−19). Express the answer in scientific notation.

Mathematics
2 answers:
insens350 [35]3 years ago
7 0

Answer: a) 3.6\cdot10^9


Step-by-step explanation:

The given multiplication problem is

(1.2\cdot10^{28})(3\cdot10^{-19})

First we open the parenthesis, and then multiply corresponding terms.

1.2\cdot10^{28}\cdot3\cdot10^{-19}\\=(1.2\cdot3)\cdot(10^{28}\cdot10^{-19})\\=3.6\cdot10^{28+(-19)}.....[\text{by using law of exponents }a^ma^n=a^{m+n}]\\=3.6\cdot10^{28-19}\\=3.6\cdot10^9

Thus, a) is the right answer.

iris [78.8K]3 years ago
5 0
The answer would be A. 3.6 × 10^9
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