A traffic light changes every 30 seconds another traffic light changes every 40 seconds both lights just changed after how money minutes will both lights change at the same time

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

43lbs of tomatos cost $387. how much would 41lbs cost

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 .