Question

Need help with part a, picture attached.

Answer 1

I know the concept, like I substitute the values in and I will get two equations which I have to solve simultaneously, that's what I think but somehow I can only get one equation to equal zero... I have to get both to equal zero to equate them, which allows me to solve for a and z.

Answer 2

1st eqn will be
8.67 = k(170^2) (a- 170)

2nd eqn will be
0 = k(200^2) (a-200)

solve for k and a .

Answer 3

put equation 2 in equation 1 to get value of k