Answer:
see explanation
Step-by-step explanation:
The circumference (C) of a circle is calculated as
C = πd ( d is the diameter )
(4)
Here d = 18, thus
C = 18π in
(5)
Here C = 50π, thus
πd = 50π ( divide both sides by π )
d = 50 in
The radius r is one half of the diameter , thus
r = 50 ÷ 2 = 25 in
will be the function to calculate population every half year.
Further explanation:
The given formula is:

In the given formula, x represents the amount of time in years. So, in order to convert the given function for yearly calculation of population, to find the population every half year the time will be converted into half. This means that instead of x, x/2 will be used.
So the new function will be:

Keywords: Population growth, Population growth function
Learn more about population growth at:
#LearnwithBrainly
Answer is A. first choice
Aver. 14 - 17 years old = 75/11 = 6.8
Aver. 10 - 13 years old = 47/11 = 4.27
Answer:
D because y>0 which is to the right