True or false the mean and the average the same number

Awork system has five stations that have process times of 5, 9, 4, 9, and 8. what is the throughput time of the system?

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).

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0