Answers edited by Jonny

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• Your profit for mowing lawns this week is $24. You are paid $8 per hour and you paid $40 for gas for the lawn mower. How many hours did you work this week?
  
• #lim_(t->0)(1-sqrt(t/(t+1)))/(2-sqrt((4t+1)/(t+2))#?
  
• How do you integrate #16/((x-1)^2(x+1)^3)# using partial fractions?
  
• How to integrate #int 2^lnx/xdx# ?