The population of bacteria in a petri dish doubles every 12 h. The population of the bacteria is initially 500 organisms. How long will it take for the population of the bacteria to reach 800?
Round your answer to the nearest tenth of an hour.
4.8
7.6
8.1
9.2

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

Answer this question only if you know the 30 points and

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.