1. 24
2.-40
3.-8a-8b
4. 10b+40
5. -2p-14
I believe these are right, hope this helps!!
Answer:

Step-by-step explanation:
we have given thickness of atmosphere =50 km
radius of earth =6400 km
average temperature of atmosphere=15°C
Average pressure of atmosphere= 0.20 atm
we have to calculate the volume of atmosphere
so the we have to calculate the volume of atmosphere = ( volume of earth +atmosphere) - volume of earth
volume of atmosphere =
=
Step-by-step explanation:
In the picture, That's a correct answer.
The answer is a
Explanation: I’m not too sure about it
So a mile has 5280 feet.
21,129/5280= 4 mph
multiply
4 x 2 = 8 miles in 2 hours