To find out how much heavier Saturn is than Venus, you can subtract the mass of Venus from the mass of Saturn:
\[ \text{Mass of Saturn} - \text{Mass of Venus} = 5.68 \times 10^{26} \text{ kg} - 4.87 \times 10^{24} \text{ kg} \]
First, we can express both numbers with the same power of ten for easier subtraction. We can convert the mass of Venus to the same exponent:
\[ 4.87 \times 10^{24} \text{ kg} = 0.0487 \times 10^{26} \text{ kg} \]
Now, we can perform the subtraction:
\[ 5.68 \times 10^{26} \text{ kg} - 0.0487 \times 10^{26} \text{ kg} = (5.68 - 0.0487) \times 10^{26} \text{ kg} \]
Calculating that, we get:
\[ 5.6313 \times 10^{26} \text{ kg} \]
So the answer is:
A. 5.6313 × 10^26 kg