  Since 990 is divisible by ten, the answer is 990. If you were rounding off 994 the answer would also be 990. If you were rounding off 995, the answer would be 1,000.
Jupiter is the largest and most massive planet in the solar system. It was named after the chief Roman god. It is a gas giant composed of liquid and gaseous matter, and has many moons. Some of the storms in its atmosphere have lasted hundreds of years.
The composition of Jupiter's interior is mostly the simple molecules hydrogen, in the form of liquid.Under the cloud layers, when the pressure of the interior becomes high enough, the hydrogen of which Jupiter is made changes to liquid hydrogen, which gradually changes further to liquid metallic hydrogen.he composition of Jupiter's interior is mostly the simple molecules hydrogen, in the form of liquid.