Practice problem
Which of the following is closest to the number of seconds in 2 years?
70,000,00070,000,00070,000,000
60,000,00060,000,00060,000,000
50,000,00050,000,00050,000,000
40,000,00040,000,00040,000,000
Type a concept, like “slope” or “photosynthesis”.