Answers edited by Jake M.

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• The SI unit of the coefficient of areal expansion is?
  
• How do you solve #(9z+5)/4+18<26# and graph the solution on a number line?
  
• For what values of x is #f(x)= e^x/(x^2-x) -e^x# concave or convex?
  
• How do you integrate #int 1/sqrt(9x-12sqrtx-1) # using trigonometric substitution?
  
• Can anybody please solve it?
  
• Question #a5322
  
• Shehkar pulls 31 coins out of his pocket. each coin is either a dime or a quarter. if he has a total of 5.95, how many dimes does he have?
  
• Find the value of #(dr)/dt# at #t=0# if #r=(theta^2 +7)^(1/3)# and #theta^2t + theta =1#?
  
• Question #50dea
  
• Question #51bdf
  
• Show that? #(P(N', n))/(P(N,n)) ~~ ((N')/N)^n# #(N', N, n) in ZZ^+# #(N', N )">>" n# #P(x,y) = (x!)/((x-y)!)# Stirling Approx allowed
  
• Consider the function f(x)=x³+x²-6x+1. Find all the points on the graph of f where the tangent line has slope of -1?
  
• What is the surface area of the solid created by revolving #f(x) = e^-x+e^(x) , x in [1,2]# around the x axis?
  
• What is the range of the function #y=-sqrt(4x^2 + 2x^4 +5)#?
  
• Question #c0954
  
• Kingda ka at six flags has a 55m drop. The rollercoaster has a mass of 8000kg. How fast it be travelling when it reaches the bottom?