Astring of lights contains three lights. the lights are wired in series, so that if any light fails the whole string will go dark. each light has probability .10 of failing during a two-year period. if the lights fail independently of each other, what is the probability that a string of lights will remain bright for two years

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered