It will take 29.4 years for the population of Africa to be two times what it is today. This reflects: doubling time.
Doubling time is the time it takes for a particular amount of size or value to double at a given growth rate. By applying the 70 rules, we can find the doubling time of the exponentially increasing population. To do this, divide 70 by the growth rate (r).
Rule of 70 is a simplified way to determine the doubling time using the equation doubling time = 70 / r. Where r is the percentage growth rate of the population. For example, if the population of 10 species increases by 2 individuals per year, the r value will be 20%.
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Answer: + =
Step-by-step explanation:
The equation of a circle is given as :
+ =
Where (a,b) are the coordinate of the center and r is the radius of the circle.
The end point of the diameter is give as (-5, -3 ) and ( -11 , -3 ) , This means that we can find the coordinate of the center by finding the mid point of the end point. The mid point is calculated by :
Mid point = ( , )
= -5
= -11
= -3
= -3
Substituting this values into the formula for finding mid point , we have
Mid point = ( ,
Mid-point = (-8 , -3)
Remember that Radius is half of the diameter , To find the diameter we must find the distance between the two end point using the formula for calculating distance between two points , that is
D =
Substituting the values :
D =
D =
D = 6
Therefore , The diameter i s 6
And since radius is half of the diameter , radius is thus
r = 6/2
r = 3
So , substituting the values gotten into the equation of circle , we have:
+ =
+ =
The form of an eclipse is written as:
(x-h)^2/b^2 + (y-k)^2/a^2 = 1
Matching the values in the given equation tot he form of an eclipse you have:
a = 6
b = 4
k = 0
h = 0
A is the radius of the major axis and b is the radius of the minor axis.
H is the X offset and K is the Y offset.
The first vertex is written as (h, k+a)
Replacing the letters with their values you get:
(0, 0+6) = (0,6)
The second vertex is written as (h, k-a)
Replacing the letters with their values you get:
(0, 0-6) = (0,-6)
The vertices of the are (0,6) and (0,-6)
The vertices are the end points of the major axis, since 6 and -6 are longer than the minor axis of -4, 4 the ellipse has a vertical major axis
Answer:
-4
Step-by-step explanation:
the highest f(x) value on the table is at -4 on the x column
Answer:
Write the mixed number as a decimal. 83/5
16.6