Can some one give me brainlirst plz :[ ymw

What acceleration is produced when a 3,000-n force acts on a 1,200-kg car? ignore the friction

What is the approximate circumference of the circle shown below? 12.2 cm

What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors