Pls me asap for 7, 8, and 9 pls (show ) + lots of points!

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy