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Evaluate the dot product of (3,-1) and (1,5)

Given: ac and db are diameters. m∠3=

Jose bought 20 shares of netflix at the close price of $117.98. in a few years, jose sells all of his shares at $128.34. how much money did jose make? a.) $192.50 b.) $207.20 c.) $212.50 d.) $224.60