Answer:
6 feet
Step-by-step explanation:
It is decay
the decrease percentage is 50%
Answer:The radius of Betelgeuse is about 5 × 1011 meters, and the radius of Venus is about 6 × 106 meters.
Step-by-step explanation:
because the 500 billion Has 11 0s so it will be 5 x 10^11
6,000,000 has 6 0s so it will be 10^6