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

b and c

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.