Need answer The domain of the following relation: R: {(-4, 8), (8, 10), (5, 4), (1, 6), (5,-9)}

{8, 10, 4, 6, -9}

{-4, 1, 5, 8}

{-4, 8, 5, 1, 5}

No domain exists

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?

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