Answer:
for 12 people cut everything in half
for 36 add the 12 to 24 people
Answer:
A) 
B)
C) τ=2326 years
Step-by-step explanation:
A)
Consider the differential equation:

Separate variables dD and dt:

Integrate: Remember that The integral of dD/D is ln(D).



And do
, so:

B)
The function we have found is a function that let us know how many of Ra is after t years, so, evaluate the function at t=100:

Which rounded is 95.8.
C) For this equation it is known that the life half life τ is equal to (1/λ), where λ is the exponential number that is multiplying to -t in the D(t) function; so for this case, λ=0.00043, and the life half life is
,
which rounded is equal to 2326 years.
Answer:
-18
Step-by-step explanation:
-8 + 70/-7
-8 - 10
-18
Formula for degree to radian:
degree ×
so...

Exact answer:

Rounded answer:
4.89
Hope this helped!