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• 36>=(1-5z)>-22 Subtract 1 from all terms, 35>=-5z>-23 Divide by (-5), remember to change the direction of inequality since you're dividing by a negative number. -7<=z<(23/5)

  in How do you do this problem ? Comment by denis-s June 2021
• a) The flow rate stays constant. Q=VA V1*A1=V2*A2 For a circular cross section, area is a function of d^2. V1*d1^2=V2*d2^2 V2=V1*(d1/d2)^2=13(1.1/0.85)^2=21.8 cm/s . . . b) Use Bernoulli's equation with no change in elevation z, p1+(1/2)rv…

  in How to do this physics problem? Comment by denis-s June 2021
• Use the product rule for products, y=f(x)*g(x) y'=f(x)*g'(x)+g(x)*f'(x) . . Use the quotient rule for quotients, y'=(g(x)*f'(x)-f(x)g'(x))/(g(x))^2 . . f(x)=1-x g(x)=2x f'(x)=-1 g'(x)=2 Using the quotient rule, y=(1-x)/2x y'=(2x(-…

  in Calculus Derivative problem? Comment by denis-s May 2021
• Use the product rule for products, y=f(x)*g(x) y'=f(x)*g'(x)+g(x)*f'(x) . . Use the quotient rule for quotients, y'=(g(x)*f'(x)-f(x)g'(x))/(g(x))^2 . . f(x)=1-x g(x)=2x f'(x)=-1 g'(x)=2 Using the quotient rule, y=(1-x)/2x y'=(2x(-…

  in Calculus Derivative problem? Comment by denis-s May 2021
• Use the product rule for products, y=f(x)*g(x) y'=f(x)*g'(x)+g(x)*f'(x) . . Use the quotient rule for quotients, y'=(g(x)*f'(x)-f(x)g'(x))/(g(x))^2 . . f(x)=1-x g(x)=2x f'(x)=-1 g'(x)=2 Using the quotient rule, y=(1-x)/2x y'=(2x(-…

  in Calculus Derivative problem? Comment by denis-s May 2021