An outboard motor has an initial price of ​$2,450. A service contract costs ​$300 for the first year and increases ​$100 per year thereafter. The total cost of the outboard motor​ (in dollars) after n years is given by ​C(n)=2,450+300n+50n2​, where n≥1. Complete parts​ (A) through​ (C). ​(A) Write an expression for the average cost per​ year, C(n)​, for n years.

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.