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Kazeer [188]
3 years ago
8

Round off each of the following numbers to two significant figures:

Chemistry
2 answers:
malfutka [58]3 years ago
7 0
A) 5.2 x 10^2
B) 86.
C) 6.4 x 10^3
D) 5.0
E) 22.
F) 0.89
topjm [15]3 years ago
6 0

Answer:

(a) 5.1 × 10²

(b) 86

(c) 6.4 × 10³

(d) 5.0

(e) 22

(f) 0.89

Explanation:

To round off a number, we consider the number that is to its right. If that number is 5 or higher, we increase the number of interest. If the number to the right is 4 or lower, the number of interest remains the same. When taking less significant figures, we might need to use scientific notation for large or small numbers.

<em>Round off each of the following numbers to </em><em>two</em><em> significant figures: </em>

<em>(a) 517</em>   → 5.1 × 10²

<em>(b) 86.3</em>  → 86

<em>(c) 6.382 × 10³ </em> → 6.4 × 10³

<em>(d) 5.0008</em>  → 5.0

<em>(e) 22.497</em>  → 22

<em>(f) 0.885</em> → 0.89

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