A resident in a particular city pays a water bill of $4.69 per month plus $1.75 per 1000 gallons of water used (up to 4000 gallons). If this city has 499 comma 000 customers that use less than 4000 gallons a month, find its monthly revenue function R(x), where the total number of gallons x is measured in thousands. Question content area bottom Part 1 R(x)equals enter your response here (Use integers or decimals for