If on an average you inhale once every three seconds exactly how many times do you inhale in a 24 hour day

28,800

Explanation:

First convert hours to minutes.

60 minutes in an hour so: 24 x 60 = 1,440 (mins)

Second convert minutes to seconds.

60 seconds in a minute so: 1,440 x 60 = 86,400

Divide 86,400 by three. For every three seconds, you inhale once; 3:1 ratio.

86,400/3 = 28,800

This gives us our final answer. You inhale approximately 28,800 times in a 24 hour day.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).