The mean sat verbal score is 478, with a standard deviation of 98. use the empirical rule to determine what percent of the scores lie between 380 and 478. (

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

What’s -11-33k and factor each expression completely

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.