The produce manager at a farmer’s market was interested in d…

The produce manager at a farmer’s market was interested in determining how many oranges a person buys when they buy oranges. He asked the cashiers over a weekend to count how many oranges a person bought when they bought oranges and record this number for analysis at a later time. The data is given below in the table. The random variable x represents the number of oranges purchased and P(x) represents the probability that a customer will buy x oranges. Determine the mean number of oranges purchased by a customer.

21. The heat required to change 1.0 kg of a substance from t…

21. The heat required to change 1.0 kg of a substance from the solid to the liquid state is called the heat of fusion, The latent heat of fusion for water is 79.7 kcal/kg.   One kg of ice  at 0oC absorbs 79.7 kcal of heat, the final  state of the substance is: