a) If you calculaate everything, you'll find out that Jupiter has the highest mass, not only because that is what the answer syas, because it's also an exponent of a higher number (27).
b) Mercury:
4.88 * 10^3 (diameter). Radius is the half the diameter, so:
[tex] (4,88*10^{3}) / 2 [/tex]
[tex] (4,88*1000) / 2 [/tex]
[tex] 4880 / 2 [/tex]
[tex] \bf~2440 [/tex] → radius of Mercury in km.
c) Mass of Jupiter:
[tex] 1,898 *10^{27} [/tex] = 1898000000000000000000000000000 kg
Mass of Saturn:
[tex] 5.86*10^{26} [/tex] = 586000000000000000000000000 kg
Difference:
1898000000000000000000000000000 - 586000000000000000000000000 = 1 897 414 000 000 000 000 000 000 000 000 kg
Hope it helped,
BioTeacher101
