Cuanto es 12.000 + 5.000

Sorry guys but as you have a small brain

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

Find the value of x. give reasons to justify your solutions! h ∈ ig