The fees for a biochemistry major are $1,728. To major in biochemistry, Toby requires 144 credit hours of coursework. How can he calculate the cost of the fees per credit hour? What is the cost of the fees per credit hour?

Find the local maximum and minimum values and saddle point(s) of the function. if you have three-dimensional graphing software, graph the function with a domain and viewpoint that reveal all the important aspects of the function 5. f(x, y) xy y + y 6. f(x, y)-xy 2x 2y x-y 7. f(x, y) x-y)1 - xy) 8. f(x, y)y(e- ) 9. f(x, y)-x y* + 2xy 10. f(x, y) 2 x* + 2x? - y? 11. f(x, у) — х* — зк + 3ку? 12. f(x, y)xy3 - 3x2 - 3y2 - 9x 13. f(x, y) — х* — 2х? + у? — зу 14. f(х, у) — у сos x 15. f(x, y)e cos y 16. f(x, y)xye-lw? +y2\/2_ 17. f(x, y)xy e° 18. f(x, y)(x2y')e 19. f(x, y)y2 2y cos x, -1 7 20. f(x, y)sin x sin y, -