I'm not sure exactly what you're asking but 1×10^-5 is .00001. I could be interpreting your question wrong in which case I'm sorry.
0.34 + x + 1.11 + 0.17 + 0.43 = 2.63
x + 2.05 = 2.63
x + 2.05 (-2.05) = 2.63 (-2.05)
x = 0.58
0.58 in fell in Day 2
hope this helps
Answer:

Step-by-step explanation:
2 4/5 + 2 3/5 = 4 7/5 = 4+1+2/5 = 5 2/5
90 x 135% = 90 x 1.35 = 121.5 (notice that instead of finding 35% and adding it on, I included the 90 by mutliplying by 1.xx) - in this case xx - 35 since it was a 35% increase.