Apolice car's siren operates at a frequency of 2,000 hz. what frequency would a stationary listener observe if the police car is driving towards him at 65 mph? note vsound = fλ, where vsound (the speed of sound in air) is 345 m/s. also, 1 mile = 1.609 km.

we can use formula

where

fL is listener frequency

fs is siren frequency

va is the speed of sound in air

vs is police car speed

so, we have

now, we can change it into m/s

now, we can plug it

..............Answer

its 8

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: