Answers edited by Justin

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• Does the equation #y=5/2x# represent a direct variation and if so, identify the constant of variation?
  
• Find the integral #intsec(x)/(sec(x)+tan(x))dx#?
  
• Question #1211a
  
• Question #75a4b
  
• The specific heat of iron is 0.46 J/gC. How many joules will it take to make the temperature of a 150 g bar go up from 25 C to 60 C?
  
• Question #8f91f
  
• Question #8d661
  
• Question #be320
  
• A firefighter at the scene of a fire is holding a heavy hose out of which water is gushing. To keep her balance, she often has to lean. Which way does she lean, forward or backward, and why?
  
• How do you find the Taylor's formula for #f(x)=sinx# for #x-pi#?
  
• How do you find a power series representation for #f(x) = ln(x^2+1)# and what is the radius of convergence?