Answer:
r=21+y
Step-by-step explanation:
its telling you that r is going to be equal to the rest of the equation, so we start with
r=
then, it mentions the sum of 21 and y, so this would be represented as
21+y
since r is equal to the sum of 21 and y, your answer is
r=21+y
(because of comutitive property, r=y+21 is also an acceptable answer.)
Answer:
x = -5
Step-by-step explanation:
x+7=2
-7 | -7 -7 from both sides
x= -5
Answer:
24.1 billion
Step-by-step explanation:
One way to write the logistic function is ...
P(t) = AB/(A +(B-A)e^(-kt))
where A is initial value (P(0)), and B is the carrying capacity (P(∞)). We are told to use relative population growth in the 1990s as the value for k.
In billions, we have ...
A = 5.3
B = 100
k = 0.02/5.3 ≈ 0.003774 . . . . . relative growth rate at 20 M per year
t = 2450 -1990 = 460

Answer:
o
Step-by-step explanation:
if x = 0 ,y =10
4×0+10
=10
if x = 1, y = 6
=4×1 + 6
=4 +6
=10
if x = 2, y = 2
=4×2 +2
=8 + 2
=10
u can substitute any value for x and y ...i have only used positive values here
Answer:
The volume of a sphere is 2/3 times the volume of a similar cylinder
Scale factor : 2/3
Step-by-step explanation:
Let us consider a sphere of radius r. The volume of the sphere will be given as

Similarly, let us consider a cylinder with its height being twice the radius of the sphere. We will have its volume given as:

but h = 2r
Hence we have

We can divide the two volumes to get a constant that links them together

this will give us 2/3
Hence the scale factor for Vol sphere: Vol cylinder is 2/3