- Defination of primary and secondary standard substance?

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1. Give two functions f(x) & g(x) such that (fg)(-1)=4. 2. Give two functions f(x) & g(x) such that f(g(2))=7.? X<7.5 convert x interval to standard z units? How do i find the area of the sector? Needing help with angles in physics? 1. Give a function h(x) which does not have an inverse function. 8. Give a polynomial function g(x) with zeros 1,2,3.?