The echo reflected sound will b distinetly heard only at ordinary temperature is the distance of the reflecting surface from the source of sound is at least:
The mean of 100 observations was calculated as 40. It was found later on that one of the observation was misread as 83 instead of 53. The correct mean is:
Prompted by proposal to convert a shipyard into a complex of condominiums with full-service marina and boat repair center and by concern about the proposal from local residents, baymen, and environmentalists, the town is considering a one-year building moratorium for the water front area.
Which of the following, if true, would most seriously weaken opposition to the complex ?
