7. An airplane passenger carries 215 N suitcase up the stairs, a displacement of 4.20 m vertically and 4.60 m horizontally.
a. How much work does the passenger do on the suitcase?
b. The same passenger carries the same suitcase back down the
same set of stairs. How much work does the passenger do on
the suitcase to carry it down the stairs?

A). redi wish i´ve

Your answer would be b. the total kinetic and potential energies of its particles 

When calculating percentage we need two numbers. one number represents total amount of certain thing and another number represents partial number of that thing. then we divide those two numbers.in this problem total amount represents total number of weeds growing on some surface. partial number represents chicory.percentage = partial / total * 100%percentage = 29 / 98 * 100%percentage = 29.6%our calculation is closest to answer b) so this is our correct answer.