Which airplane has more potential energy, a boeing 787 dreamliner having a mass of 2,450kg at 11,500 m above Earth, or a boeing 747 having a mass of 3150 kg at 9000 m above Earth?

Explanation:

For 787 dreamliner airplane,

Mass,

Height,

Potential energy of 787 dreamliner airplane is given by :

For a boeing 747,

Mass,

Height,

:

Potential energy of a boeing 747 airplane is given by

So, the potential energy of a boeing 747 airplane is more than the 787 dreamliner airplane.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)