Express in scientific notation. make sure your answer has the same number of significant figures as the starting value. (1.8 x 10-2) ÷ (9 x 102) =

The result of division (1.8 x 10⁻²) ÷ (9 x 10²) is 2.10⁻⁵ (cause the result must have 1 significant number)

Significant numbers are obtained from measurement results of exact numbers and the last number estimated

This is called significant numbers

The scientific notation can be described as:

a, ... x 10ⁿ

where the power of n is an integer, and the coefficient a is a real number

Rules for significant numbers in general:

In the question, it is known that

(1.8 x 10⁻²) ÷ (9 x 10²) has 2(1.8) and 1(9) significant numbers, so the division of both produces 1 significant number

So that we did the significant number then proceed with rank number

1.8: 9 = 0.2

10⁻²: 10² = 10⁻⁴

So the result = 0.2.10⁻⁴

In the form of scientific notation, it becomes: 2.10⁻⁵

The result has one significant number, which is number 2

the number of significant figures

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the result of multiplying of significant numbers

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Compute 4,659 × 104−2.14 × 104.

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Keywords: the scientific notation, significant number

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it