The cost for operating a television varies directly as the number of hours that it is in operation. if it costs $18.00 to operate a standard-size color tv continuously for 30 days, how much would it cost to operate the tv for 9 days?

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .