Answer:
The speed of the wind is 25 km/hr.
Explanation:
Let us call 
the speed of the plane and 
the speed of the wind. When the plane is flying against the wind, it covers the distance of 900-km in 2 hours (120 minutes); therefore;
(1). 
And when the plane is flying with the wind, it covers the same distance in 1 hour 48 minutes (108 minutes)
(2). 
From equation (1) we solve for and get:
,
and by putting this into equation (2) we get:
or in km/hr this is
<h2>Hey there!</h2>
<h2>The answer will be:</h2>
<h3>"Host"</h3>
<h2>Explanation:</h2><h2 /><h3>Viruses use the energy of the <u>host</u> cells to reproduce themselves.</h3>
<h2>Hope it help you</h2>
Electricity. I took something like this hope this helps :)
Answer:
Because there is nothing out in space , the sound waves from one astronaut's whistling can't travel over to the other astronaut's ears.
