After 3 half-lives, the remaining amouunt will reduced by a factor of (2*2*2) or 8.
So 150 grams after 3 half-lives will be reduced to 150 / 8 = 18.75 grams.
Answer:
here are 92 students who take public transportation
Step-by-step explanation:
There are 460 students who walk
20% of those who walk take public transportation
Students who take public transportation = 460*20%
Changing this to decimal form
Students who take public transportation = 460*.20 = 92
There are 92 students who take public transportation
Step-by-step explanation:
First you need to get x on one side by subtracting it from either side
Second step the side you subtracted the x to you need to get rid of the number like the number 5
Third step you need to separate the number and x since they are being multiplied to be put together you need to do the opposite and divide on both sides
Here is a list of the odd number paired
1+3, 1+5, !+7, and !+9 (there are 4 unique sums - 4, 6,8 and 10)
3+5, 3+7, 3+9 (notice I did not pair 3 with 1 and the the only new sum is 12)
5+7, 5+9 (the only new sum is 14)
7+9 (16 is a new sum)
The sums (no repeats) are 4,6,8,10,12,14 and 16 for a total of seven numbers.
Answer:
2 and 1/2 in fraction form
decimal : 2.5
Step-by-step explanation:
divide 4 by 2 and get 2 then 8 by 2 and get 4 that leaves u with 2 and 2/4 then divide by 2 again and u get 1/2 bc u divide 2 by 2 which is 1 and 4 by 2 which is 2