Which could be the length of the third side of a triangle with side lengths 3ft and 9ft? explain

A) 6ft

B) 7ft

C) 12ft

D) 13ft

The highest common factor of 132 and 220

Which statement best describes the polynomial

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.