can someone answer some questions?

[frogmangy13]

can someone tell me what it means when the music is like this. which part of the right hand do i play? the top one or the bottom one? or do i play both? thank you for the help

[thinkgreenlovepiano]

The bottom one.
The top is for the singer...

[dahmin]

And the chords are for guitar

[quantum]

Here we have three staves.  The top stave is for the singer.  The middle stave is for piano RH.  The Bottom stave is for piano LH.  Notice at the far left you have a curly bracket.  This is a clue that the staves contained in this bracket are for piano / keyboard.  Also notice how in the piano part bar lines are extended between staves.  Notice how the vocal part does not connect bar lines with the piano part. 

In the piano RH stave.  See how you have notes with stems up and down in the same measure.  This indicates separate "voices." (Doesn't mean we sing them, in this case voices denotes there are multiple parts written on the same staff).  In the first bar you hold the A with RH 5th finger while playing the bottom notes with your remaining RH fingers.