[20pts] Consider the 3rd order ODE  y”’-4y”=0  a) Write do…

[20pts] Consider the 3rd order ODE  y”’-4y”=0  a) Write down the auxiliary equation and solve it (justify your answer) b) Find the general solution of the differential equation c)  Find the solution that satisfies the initial values  y(0)=2, y'(0)=1, y”(0)=8   Note: You must show all your work to deserve the full credit assigned to any question.

A 55-year-old man is admitted with high fever, non-productiv…

A 55-year-old man is admitted with high fever, non-productive cough, and hyponatremia. A sputum gram stain shows many neutrophils but no visible organisms.  Routine bacterial cultures are negative after 48 hours. The clinician suspects Legionella pneumophila infection. What is the most rapid and specific test for confirming the diagnosis?

A child presents with an infected finger after having been b…

A child presents with an infected finger after having been bitten by his pet cat.  The culture of the wound grew a pure culture of gram negative the organism shown below on gram stain.    Additional characteristics of this organism include: Indole – positive Catalase – positive Oxidase-positive Urease-negative No Growth on MAC The most likely identification is which organism?