HELP PLEASE!! Bill used a first class lever to lift a heavy boulder that requires 200 N of
force to be lifted. He pushed down on one end of the lever with 50 N of
force. This end of the lever went down 0.5 m. This resulted in the boulder
lifting 0.1 m. What was the mechanical advantage of the lever? Please
record the NUMERICAL VALUE only.

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation:

the total distance traveled by the car is

30km + 49km = 79 km .

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.