Why can making observations be a very good way to come up with a scientific question?
A. Observations and questions are the same thing.
B. Observations make sure that your question is scientific.
C. You are likely to observe something that makes you curious.
D. You can't actually observe something without thinking of a question first.

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.