Answer:
4/9 and 8/9
Step-by-step explanation: you have to have a common denominator so you take 3 and 9 and find what they both go into and that number is 9 so take 2/3 and times the top and bottom by 3 to get 6/9 and 2/9 by 1 to get 2/9 once you have those subtract them to get 4/9 and that's your first answer then take them and add so you get 8/9 which is your second answer
Answer:
28 is thee answer
Step-by-step explanation:
Answer:
-72
Step-by-step explanation:
(-4)(-9)(-2)=
36(-2)=
-72
Answer:
It will take 60 days for half of the Iodine-125 to decay
Step-by-step explanation:
The amount of iodine-125 after t days is given by the following equation:
In which Q(0) is the initial amount and r is decay rate, as a decimal.
Decay rate of 1.15% per day.
This means that
So
To the nearest day, how long will it take for half of the Iodine-125 to decay?
This is t for which
So
To the nearest day
It will take 60 days for half of the Iodine-125 to decay