Diff. equations?

Question

The barometric pressure y (in inches of mercury) at an altitude of x miles above sea level decreases at a rate proportional to the current pressure according to the model

(dy/dx)= −0.2ywhere
y = 29.92 inches
when
x = 0.
(Round your answers to two decimal places.)
(a) Find the barometric pressure at 9462 feet.


(b) Find the barometric pressure at 20,410 feet.  

 

 

 

Answer 1

The differtial equation is dy/dx = - 0.2y and y = 29.92 inches and x = 0 miles.