A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The
study found that the mean SAT score was 496 with a margin of error of 20.
Which of the following is a reasonable value for the true mean SAT score of
graduating high school seniors?

Find the solution of system of equation y= x-4 y=4x+2

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

What is the absolute value of the complex number -4-sqrt2i