Please help me will give brainliest to the correct answer :)

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

What is the circumference of a circle with an area of 50.24 cm²?