Abox is filled with 11 blue cards, 2 green cards, and 7 brown cards. a card is chosen at random from the box. what is the probability that it is a blue or a brown card? write your answer as a fraction in simplest form

Write each expression in exponential form and find its value. 3 x 3 x 3

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

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.