Express the following calculations to the proper number of significant figures.
`((2.34xx10^(-8))(0.5))/(6.4)`

Explanation

In this calculation 0.5 has minimum number of significant digits. It has only one significant digit. The result of this calculation is, therefore , to be rounded off to one significant digit.
`((2.34xx10^(-8))xx(0.5))/(6.4)`
`=(1.17xx10^(-8))/(6.4)=0.1828125xx10^(-8)`
Here 8, after 1 is greater than 5, so the result after rounding off is `0.2xx10^(-8)` .