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• How do you solve by the substitution method to find the ordered pair 2x + 5y = -11 and x = -4 - 4y?
  
• How do you write 0.00608 in scientific notation?
  
• A piece of ice (heat capacity `= 2100J kg^(-1 @)C ^-1` and latent heat `= 3.36 xx 10^5 J kg^-1`) of mass `m` gram is at `-5^@C` at atmospheric pressure. It isgiven `420 J` of heat so that the ice starts melting. Finally when the ..........?