The freezing point of water is 0°C. Scientist use positive numbers to show temperature is above the freezing point of water and negative numbers to show temperatures are below the freezing point of water. Sarah keeps her bacteria samples at 4°C. what does 4°C mean in this situation? PLEASE HEL

Will give brainliest for correct answer 8. use the distance time graph to answer these questions: a. what does the graph tell us about the velocity of the car? b. what is the average velocity of the car? (show work) c. is the velocity reflected in the graph positive or negative?d. is there any point on the graph where the car is not moving? how do we know?