Atruck uses gas as g(v)=av+bv, where v represents the speed of the truck, g represents the gallons of fuel per mile, and a and b are constants. at what speed is fuel consumption minimized?

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.

a=d/t

a="triangle"v/t

explanation:

a = acceleration