Answer:
simplest form is 7/8
Step-by-step explanation:
Answer:
6t=9? let me know if that's correct x
Step-by-step explanation:
Answer:
A^32
Step-by-step explanation:
Done
Answer:
a)
, b)
, c)
, d) 
Step-by-step explanation:
a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

b) The general solution is found after separating variables and integrating each sides:

Where
is the time constant and 
c) The time constant is:


The particular solution of the differential equation is:

d) The amount of radium after 300 years is:

Answer: 0.0049 hope this is right