Maths Analysis Question Help

[airline]

I am having trouble completing an analysis question.

The equation for the COST of laying power cables is:
C=a[8-5tan(30)]+5bsec(30)
where 'a' and 'b' are separate costs($) for laying the cable underwater and on land respectively.

I need to investigate the possible effects of a change in the costs of running the cable under water and/or on land.

How would I show and explain my results?
I suspect that I need to show some kind of graph...possibly a derivate...?

 

[Deleted member 4993]

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I am having trouble completing an analysis question.

The equation for the COST of laying power cables is:
C=a[8-5tan(30)]+5bsec(30)
where 'a' and 'b' are separate costs($) for laying the cable underwater and on land respectively.

I need to investigate the possible effects of a change in the costs of running the cable under water and/or on land.

How would I show and explain my results?
I suspect that I need to show some kind of graph...possibly a derivate...?

Yes (and no) - however, without the complete problem and its associated sketch - we cannot do much.

The way you wrote cost function - it is a constant. If you took derivative of "that" - it'll be always 0 (unless "a" and "b" are variable).