Mathematics, 21.02.2020 01:55, ben2005

Suppose that income is a function of age. The following function represents the relation between average annual income I and age a.
I(a)=-54a^2 +5119a-54,421
(a) For what age does average income I equal $40,000?
(b) For what age does average income I equal $50,000?

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Suppose that income is a function of age. The following function represents the relation between ave...