suppose that x is the number of bears spotted by tourists to banff, canada. the table below is the probability distribution for x. what is the expected value of x, that is, what is the mean of its distribution?

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:

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class