Answers edited by NGBRO

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• Question #ea8a2
  
• Question #63acc
  
• How do you use the amplitude and period to graph #of y=sin(x + (pi/2) )#?
  
• How do you solve #3x+6y=9# and #2x+8y=10# using substitution?
  
• How do you calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 and 1.100% are C-13 atoms (13.003354 amu)?
  
• How do you balance #NO_3^(-) + 4H^+ + Pb -> Pb^(2+) + NO_2 + 2H_2O#?
  
• The exponential decay graph shows the expected depreciation for a new boat, selling for $3500, over 10 years. How do you write an exponential function for the graph. Use the function to find the value of the boat after 9.5 years?
  
• Question #4ee83