Answer :
Final answer:
The size of a cowpox virus is approximately 0.000 000 29 metres. In standard form, this value is 2.9 x 10^{-7} metres.
Explanation:
The size of a cowpox virus is approximately 0.000 000 29 metres. To express this value in standard form, we need to move the decimal point to the right until we have a number between 1 and 10. So, in standard form, the size of a cowpox virus is 2.9 x 10-7 metres.
Learn more about Expressing numbers in standard form here:
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