Acarpenter is making doors that are 2058.0 millimeters tall. if the doors are too long they must be trimmed, and if they are too short they cannot be used. a sample of 22 doors is made, and it is found that they have a mean of 2045.0 millimeters with a standard deviation of 13.0. is there evidence at the 0.1 level that the doors are either too long or too short? assume the population distribution is approximately normal.

$12. that is my answer.

6/20

step-by-step explanation:

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

its line 2 i just added the rest or else it wouldn't let me answer