The mass of Saturn is approximately 5.68 × 1026 kg, and the mass of Venus is approximately 4.87 × 1024 kg.
How much heavier is Saturn than Venus?
A.
1.0513 × 1025 kg
B.
5.6313 × 1026 kg
C.
5.7313 × 1026 kg
D.
8.1013 × 1025 kg
B. 5.6313 × 10^26 kg
To find the difference in mass between Saturn and Venus, subtract the mass of Venus from the mass of Saturn:
5.68 × 10^26 kg - 4.87 × 10^24 kg = 5.68 × 10^26 kg - 0.487 × 10^26 kg = 5.6313 × 10^26 kg
Therefore, Saturn is approximately 5.6313 × 10^26 kg heavier than Venus.
Which shows the expression below in simplified form?
(9.3 × 10-5) - (3.2 × 10-6)
A.
6.1 × 10-6
B.
8.98 × 10-6
C.
8.98 × 10-5
D.
9.268 × 10-5
A. 6.1 × 10^-6
To subtract the given expressions, you need to have the same power of 10 in the scientific notation.
(9.3 × 10^-5) - (3.2 × 10^-6)
= 9.3 × 10^-5 - 0.32 × 10^-5
= 9.3 - 0.32 x 10^-5
= 9.3 - 0.32 x 10^-5
= 6.1 x 10^-6
Therefore, the expression simplifies to 6.1 × 10^-6.