20 points algebra problem ( I solved it need to double check) A manufacturer makes circular targets that have an area of 15ft^2 According to competition rules the area in error can be in no more than .5 ft^2 Use absolute inequality to find the acceptable range of values for the radius.

I solved this problem just need to double check it

it would rotate about 180 degrees.

there are infinitely many solutions.

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