400 in² = (20 in)²
The area of a square is the square of the side length.
The length of one of the sides is 20 inches.
Answer:

Step-by-step explanation:
The given function is
f(x) = 4x
As we know
f(x) = y, which implies x= 
Therefore,
y = 4x
x = 
as x= 
So,

replacing y by x in the above expression

So our inverse function is 
Answer:4y
Step-by-step explanation:
Answer:
In one second it turns 200 / 60 = 3 1/3 revolutions. Since one revolution is 360°, the answer is 6 2/3 π radians.
Answer:

Step-by-step explanation:
Diameter of the circle=

Circumference of a circle:


Area of the circle:

