A resident in a particular city pays a water bil of $4 44 per montth plus $0.50 per 1000 galons of water used (up to 4000 galions) If this cty has 449,000 customers that use less than 4000 galons a month tnd its monthly revenue function R(), where the total number of gatons x is measured in thousands R(0)- (Use integers or decimals for any numbers in the expression Do not include the $ symbol in your answer)