Answer: 9
Step-by-step explanation:
Sorry the pi sign looks weird. The formula for area of a circle is
, so we have to substitute the radius with 3. The square of 3 is 9, so the answer is 9pi.
5836200 because it's rounded
Answer:
mean life = 8264.5 s
Step-by-step explanation:
k = - 0.000121
The relation is given by

Now, the mean life is the life time for which the sample retains.
The mean life is the reciprocal of the decay constant.
The relation between the mean life and the decay constant is

Answer: 5/2
Explanation:
According to 30-60-90 triangle rule:
The side opposite of 30 degree is equal to half of the hypotenuse and the hypotenuse here is 5 so therefore x = 5/2
Answer:
The answer might be 100° c