Respuesta :

tonb
here are a few answers...
c1) multiply by 1.125
c3) 3/4 + 3/5 = 15/20 + 12/20 = 27/20 = 1  7/20
6) 0.189 = 189/1000 
7) 240x(1.06)³ ≈ 285.84
8) 0.2*x = 112 => x=112/0.2 = 560
10)  -3.08*10^6

19) √(16 + 49 + 2×4×7) = 11