Step-by-step explanation:
dP/dt = -0.4P
Separate the variables and integrate.
dP/P = -0.4 dt
ln|P| = -0.4t + C
P = Ce^(-0.4t)
Use initial condition to find C.
2 = C^(0)
C = 2
P = 2e^(-0.4t)
dQ/dt = -1
Integrate.
Q = -t + C
Use initial condition to find C.
3 = 0 + C
C = 3
Q = -t + 3
Set the two equal.
2e(-0.4t) = -t + 3
Use a calculator to find t.
t = 2.156
The populations have the same size after 2.156 hours.
Answer:
You have to convert the denominator. -37/36
Step-by-step explanation:
-1/4 - 7/9
-7/9(4)
-1/4 (9)
-9/39 -28/36
-37/36
No, 0.7 is greater than 0.09
0.70 > 0.09
hope this helps
Yes because if you solve it it will become -11k
