Estimates are used when the actual value of a quantity cannot be determined.
The estimation of [tex]0.000007328[/tex] is [tex]7\times 10^{-6}[/tex]
The number (n) is given as:
[tex]n = 0.000007328[/tex]
Multiply by 1
[tex]n = 0.000007328 \times 1[/tex]
The number is to be rounded to the nearest millionth.
So, we substitute [tex]\frac{1000000}{1000000}[/tex] for 1
[tex]n = 0.000007328 \times 1[/tex]
[tex]n = 0.000007328 \times \frac{1000000}{1000000}[/tex]
This becomes
[tex]n = 7.328 \times \frac{1}{1000000}[/tex]
Express the fraction as a power of 10
[tex]n = 7.328 \times 10^{-6}[/tex]
Approximate to a single digit
[tex]n = 7\times 10^{-6}[/tex]
Hence, the estimation of [tex]0.000007328[/tex] is [tex]7\times 10^{-6}[/tex]
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