Dalton estimated the area of a circle with a diameter of 12 inches as shown below. A = r2
A = 3(12)
A = 3(144)
A = 432 in.2
Which of the following statements about Dalton's work is NOT true?
FHe squared 12 correctly.
G. He used an appropriate value for i.
H. He used an appropriate value for r.
I. He multiplied 3 and 144 correctly.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

v=1788.75

step-by-step explanation:

i belive that is the answer