Answer:
38
Step-by-step explanation:
less than 45
3 ( 14-8) =18
B= 14
I subtracted 14-8 and i got 6, then I multiplied 3 times 6 and got 18. Therefore, 14 is a valid answer.
Answer:
The probability for 7 is 1/6.
The probability for 11 is 1/18
together they are 2/9
hope this helps :) plz brainliest if does
Step-by-step explanation:
Answer:
0.2 or 1/5
Step-by-step explanation:
The half-life for such a substance is the time 
required to have the amount (in grams 
) at time (in seconds 
), 
, decay to half the starting amount 
. In other words, for krypton-91, after 10 seconds we would have 
. We can use this information to solve for 
, then plug in various values of to find the amount of krypton-91 that's left...
But we don't need to! We already know it takes 10 seconds for half of the substance to decay. So if we start with 16 grams, then after 10 seconds, 8 grams will remain.
10s later (after a total of 20 seconds), 4g will remain.
10s later (30s), 2g will remain.
10s later (40s), 1g will remain.
10s later (50s), 1/2 g will remain.
