Question

I just finished my other 2 questions and I need help with this one now, I don't understand the letters really. please help

Answer 1

So, c(x) = 8.25x + 1500

the marginal cost doubles so, (8.25 x) will be 2 * (8.25x )

And the fixed cost decreased by 30%

so, 1500 will be (1 - 30%) of 1500

so, (1 - 30%) of 1500 = 70% of 1500 = 0.7 * 1500 = 1050

So, k(x) = 2 * (8.25x) + 1050

K(x) = 16.5 x + 1050