Slove the math step by step

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

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 .

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.