Answer: [tex]63\times10^4[/tex]
we need to estimate the product of two numbers by writing them in scientific notation and rounding them off.
In scientific notation, number 91321972 can be written as [tex]9.1321972\times10^7[/tex]
If we round this off to 1 significant figure, it would be:
[tex]9\times10^7[/tex]
In scientific notation, number 0.007004 can be written as [tex]7.004\times10^{-3}[/tex]
If we round this off to 1 significant figure, it would be:
[tex]7\times10^{-3}[/tex]
Product of these two numbers:
[tex]9\times10^7 \times 7\times10^{-3}=9\times7\times10^{7-3}=63\times10^{4}[/tex]
