Posted: September 18th, 2021

Data on the global atmospheric concentration of

7. Data on the global atmospheric concentration of carbon dioxide in parts per million(ppm) from 1970 to 2010 are given below. Determine whether the trend appears linear. Ifso, and assuming the trend continues, the level of carbon dioxide in the atmosphere in theyear 2020 is predicted to be _______________.Year19701980199020002010Carbon Dioxide(ppm)3253393543693878. The average annual cost (in dollars) of tuition and fees for in-state students at public 4year colleges and universities has been increasing at a constant rate. In 2003 the cost was$4645. By 2005 the cost had increased to $5491. Assuming this trend continues,a. Find a linear function that models the cost of tuition C as a function of the year t.b. Predict the cost in 2007.c. Identify the year in which the cost will reach $10,700.Show explanation/work.9. Solve each system, if possible, using any one of the three methods:graphical, substitution or addition. Also, determine whether each system isconsistent or inconsistent and whether the equations are dependent or independent.Show explanation/work for each system.2x +5ya.= 104x +10y = 154x - 4y = 20b.2x +5y = - 4x- yc.=5- 2x +2y = - 1010. A company has a cost of production C(x) =85x +900. where x units of a product costC dollars to manufacture.a. If the company needs to break even after 45 units sold, at what price should they selleach unit?b. Write the revenue function R(x).Show explanation/work for each system.

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