2. A cell changes from 1 to 2 every 30 minutes. How many cells can this cell divide from 1 after 3 hours? Please calculate and list the calculation process.
30 minutes =0.5 hours
Division times =3/0.5=6 times
After 3 hours, the cell can divide from 1 to the 6th power of 2 =64.
3. Have a drink, pour half for the first time and the remaining half for the second time. . . At this rate, how much is the remaining drink after the fifth time? (List calculation process)
The rest of the drinks after the fifth time are the same.
1*( 1- 1/2)*( 1- 1/2)*( 1- 1/2)*( 1- 1/2)
= 1*( 1/2)*( 1/2)*( 1/2)*( 1/2)*( 1/2)
= half of 65438 +0 to the fifth power
= 0 in 65438+32.
4. Now a piece of paper with a thickness of 1mm is continuously folded in half. How many times must I fold at least to make the thickness of the folded paper exceed 1 m? If you continue to fold, how many meters is it to fold 20 times? (calculation)
1m = 1000mm
The thickness after folding is 2mm, 4mm, 8mm and 16mm, which are 1 power, 2nd power, 3rd power and 2nd power respectively. .........
10 squared = 1024
therefore
To make the whole stack of folded paper more than 1m thick, it must be folded at least 10 times.
Fold it 20 times and its thickness will reach the 20th power of 2 =1024x1024 =1048576mm =1048.576m..