plz help, whoever can answer all of these correctly the fastest will get brainliest, & i will get my hw done, so win win! :)

What are the exclude value of mn+3m

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1