Answer:
Check explanation
Step-by-step explanation:


A linear function has 1 as the highest power of the variable.
A. f(x) = 2 - 7x
here, the highest power of the variable x is 1.
Hence it is a LINEAR function.
___________
B. f(x) = 2 + x + x^2
here, the highest power of the variable x is 2.
Hence it is NOT a linear function.
_______________

here, the highest power of the variable x is 1/2.
Hence it is NOT a linear function.
________________
Its the third or the fourth
Answer: Volume of the cylinder = 1570 m³
Step-by-step explanation:
The formula for determining the volume of a cylinder is expressed as
Volume = πr²h
Where
r represents the radius of the cylinder.
h represents the height of the cylinder.
π is a constant whose value is 3.14
From the information given,
Diameter = 20 m
Radius = diameter/2 = 20/2
Radius = 10 m
Height = 5 m
Therefore,
Volume = 3.14 × 10² × 5
Volume = 3.14 × 100 × 5
Volume = 1570 m³ rounded to the nearest tenth