Raijon is thinking of selling chips and wants to know what kind students prefer. He picks some of his friends at random and they try out two different brands without
knowing which one is which, Is this an Observational study or an Experiment? explain WHY you chose that answer.

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

What is the volume of this container?