Can someone help with this worksheet, please?

Cody worked 42.5 hours per week in july. this is 12.25 hours more per week than he worked in june. how many hours did cody work per week in june?

What situation is an example of an observational study

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?