Which statement is a testable hypothesis? A. Smart, careful, healthy people always brush their teeth.
B. It's wrong not to brush your teeth before you have an important
conversation with someone.
C. If people brush their teeth twice a day, they will get fewer cavities
than if they don't brush their teeth.
D. Green toothpaste tastes better than blue or red toothpaste.

[C] If people brush their teeth twice a day, then they will get fewer cavities.

Explanation:

C is the only correct option because the hypothesis is not an opinion (unlike the rest of the options), and the hypothesis is able to be tested, and accurate data is able to be collected.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.