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:
1 and 2 are correct!! Good Job!!
3. on the number line put a solid dot over 0, the line should to the right.
4. on the number line put a solid dot over -4, the line will go to the left.
5. on the number line put a open dot over 1.5, the line will go to the left.
Step-by-step explanation:
I hope this helps!! Also, you did great on 1 and 2, got this!!
Number 1: To find number 1 use hypotenuse theory. 180-(69+31) is the equation. After you solve it you get m<1 as 80.
Number 2: Since you already found m<1 find the other angle across from it.
Equation is: 180-80, which equals to 100.
Then once you have two angles use the theory again: 180-(100+45)=35.
Therefore m<2=35.
Number 3: Still using m<1, 180-100=80. Now you have to angles you get the equation:
180-(80+47), which equals to 53. Therefore m<3=53
Answers: m<1=80; m<2=35; m<3=53
Step-by-step explanation:
VERY EASY FOR ME
The real part (red) and imaginary part (blue) of the Riemann zeta function along the critical line Re(s) = 1/2. The first non-trivial zeros can be seen at Im(s) = ±14.135, ±21.022 and ±25.011. The Riemann h
ypothesis, a famous conjecture, says that all non-trivial zeros of the zeta function lie along the critical line.
SO 6+/7× and 78/+×
ANSWER