Physics 101 :/ I know.
A rectangular plate has a length of (21.3 +/- 0.2) cm and a width of (9.8 +/- 0.1) cm. Calculate the area of the plate, including its uncertainty.

Question

Physics 101 :/ I know. 
A rectangular plate has a length of (21.3 +/- 0.2) cm and a width of (9.8 +/- 0.1) cm. Calculate the area of the plate, including its uncertainty.

lilsis76 · Answer

Can anyone looking at my question explain it too me with the steps please.?
Im new to physics and it is already complicated just reading the book.

lilsis76 · Answer

@bethanymotha  @campbell_st  @Data_LG2  and @jim_thompson5910 
Do any of you know how I can start this? 
Would I do 2(21.3+.2)+2(9.8 +.1) = 62.8
and
                  2(21.3+.1)+2(9.8 -.1)=61.6    ?  Would it have 2 answers?