question: user rating: 3.5 (read 6 reviews)
Capitalize this past sentence correctly.
A: User Rating: 3.5 (Read 6 reviews)

question: in the case that your dm file doesn't open, it is highly likely that you do not have the correct software application installed on your pc to view or edit dm file extensions.
Capitalize this past sentence correctly.
A: In the case that your DM file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit DM file extensions.

question: by comparing paleo stomata densities with current ones reserchers can make some estimate of the relative co2 levels in past times comparaed with the present.
Capitalize this past sentence correctly.
A: By comparing paleo stomata densities with current ones reserchers can make some estimate of the relative CO2 levels in past times comparaed with the present.