First slide

Accuracy; precision of instruments and errors in measurements

Question

What is the number of significant figures in $(3.20 + 4.80) \times 10^{5} ?$

Easy

A

5
B

4
C

3
D

2

Solution

$(3.20 + 4.80) \times 10^{5} = 8.00 \times 10^{5}$
Number of significant figures is 3.

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