It is 10 to 1 significant figures
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:

A=80
B=100
C= 11
Is this the I-ready
Answer:
I am not totally sure what you are asking but airports use agreements with airline companies to fly there planes at that airport. The airport gives a contract and the airline company can use the airfields and housing sheds.
Step-by-step explanation: