Answer: multiple them all together or add them
Step-by-step explanation:
Step-by-step explanation:
(a) dP/dt = kP (1 − P/L)
L is the carrying capacity (20 billion = 20,000 million).
Since P₀ is small compared to L, we can approximate the initial rate as:
(dP/dt)₀ ≈ kP₀
Using the maximum birth rate and death rate, the initial growth rate is 40 mil/year − 20 mil/year = 20 mil/year.
20 = k (6,100)
k = 1/305
dP/dt = 1/305 P (1 − (P/20,000))
(b) P(t) = 20,000 / (1 + Ce^(-t/305))
6,100 = 20,000 / (1 + C)
C = 2.279
P(t) = 20,000 / (1 + 2.279e^(-t/305))
P(10) = 20,000 / (1 + 2.279e^(-10/305))
P(10) = 6240 million
P(10) = 6.24 billion
This is less than the actual population of 6.9 billion.
(c) P(100) = 20,000 / (1 + 2.279e^(-100/305))
P(100) = 7570 million = 7.57 billion
P(600) = 20,000 / (1 + 2.279e^(-600/305))
P(600) = 15170 million = 15.17 billion
Let x be the smallest number.
x＋(x＋1)＋(x＋2)＝384
3x＋3＝384
3x＝381
x＝127
The three consecutive numbers are 127, 128 and 129.
Hope my answer helped u :)
The answer is 14137.17 because to find the volume of the sphere, the equation is 4/3 times pi times the radius cubed.
Answer:
Step-by-step explanation:
14.)
lets first find x:
2x+x+90=189
3x=90
x=30
lets find y:
2y=x
2y=30
y=15
lets find z:
2y+z=180
30+z=180
z=150
