Acampus deli serves 300 customers over its busy lunch period from 11: 30 a. m. to 1: 30 p. m. a quick count of the number of customers waiting in line and being served by the sandwich makers shows that an average of 10 customers are in process at any point in time. what is the average amount of time that a customer spends in process?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Three coins are flipped. what is the probability that there will be at least two tails?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?