Answer
Circumference(C) of a circle is given by:
where r is the radius and value of 
As per the given statement:
A building engineer analyzes a concrete column with a circular cross section.
The circumference of the column is 
meters.
then;
Divide both sides by 
we have;
9 = r
or
r = 9 meters
We have to find the area of the cross section of the column
Area of a circle is given by:
then;
meter square.
therefore, the area A of the cross section of the column is 
meter square.
Step-by-step explanation:
a.) To model this scenario
Let the height of ball = y
The height of 1st= 0.5y
2nd =0.5(0.5y)
3rd = 0.5*(0.5(0.5y))
Hence the height of nth bounce can be modeled as
Height of nth bounce =(0.5ⁿ-1)*y
The exponential equation is
hn= (0.5ⁿ-1)*y
b.) if the ball is dropped from 9ft above the ground
y= 9ft
On the 4th bounce
n=4
Substituting in the exponential equation we have
h4=(0.5^4-1)*9
h4=0.5³*9
h4= 0.125*9
h4= 1.125ft
On the 4th bounce, the ball will reach a height of 1.125ft
Answer:
Umm whats the question
Step-by-step explanation:
