Wo cars start moving from the same point. One travels south at 60 mi/h and the other travels west at 25 mi/h. At what rate is the distance between the cars increasing three hours later?

Explanation:

let distance between two  cars  is = z  mi

we have to find  =

One travels south at  = 60 mi/h  =   (given)

the other travels west at =25 mi/h.=  (given)

since both car have constant speed

at t = 3 hrs

x = 3× 60  = 180 mi/h

y = 3 × 25  = 75 mi/h

from the figure (i)  we get

...............(i)

put x and y values

we get

differentiate the equation (i) w r to t

put each values

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

radiation

explanation:

heat is transmitted by radiation