Amanufacturing company has developed a cost model, c(x)= 0.15x^3 + 0.01x^2 +2x +120, where x is the number of item sold thousand. the sales price can be modeled by s(x) + 30- 0.01x. therefore revenues are modeled by r(x)= x*s(x). the company's profit, p(x) = r(x)-c(x) could be modeled by 1. 0.15x^3+ 0.02x^2- 28x+120 2. -0.15x^3-0.02x^2+28x-120 3. -0.15x^3+0.01x^2-2.01x-120 4. -0.15x^3+32x+120

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

2: 10

step-by-step explanation: