Which is an example of an experiment? A. Testing the effectiveness of a new hair product by allowing one group to use it and com
paring results against a group that doesn't use it B. Collecting the cholesterol readings of a group of individuals of a certain age group in a small town C. Calling a sample of registered voters before an election to find out what issues concern them most D. Finding out the number of monthly burglaries of a residential neighborhood for a statistical study for the police
Okay so the circumference of a circle is pi×the diameter or 2×radius× pi. In this case we are given the radius so C=2×20×3.14 C=40×3.14 C=125.60 The circumference is 125.60cm
