Distinguish between instantaneous speed and average speed. a man drives a car a distance of 200km at an average speed of 44kmh¹,what must be it's average speed for the next 220km, if the car is to cover the total distance in 9 hours?

49.32km/h

Explanation:

Given a man drives a car a distance of 200km at an average speed of 44km/h

We know that

initially

time=4.54 hours

Now Given the total trip should be completed in 9 hours

the time taken to complete the second part of the trip is 9-4.54=4.46 hours

Given the distance travelled in the second half is 220km

We know that  

average speed = 49.32 km/h.

would be false hope this out

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.