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R(x)=4x(x2+25,000)32 (a) Find the total revenue function if the revenue from 120 devices is $34,166. (b) How many devices must be sold for a revenue of at least $50,000 ? (a) The total revenwe function is R(x)=, given that the revenue from 120 devices is $34,166 (Round to the nearest integer as needed.) (b) devices must be sold to generase a revenue of at least $50,000 (Type a whole number.)