Ecologists estimate that, when the population of a certain city is x thousand persons, the average level l of carbon monoxide in the air above the city will be l ppm (parts per million), where upper l 80 + 0.4 x + 0.0006 x squared. the population of the city is estimated to be x 752 + 23 t + 0.5 t squared thousand persons t years from the present. find the rate of change of carbon monoxide with respect to the population of the city, and the time rate of change of the population when t2. how fast (with respect to time) is the carbon monoxide level changing at time t2?

30 points! here is a you are the new manager at trusty goods wholesale produce. you need to figure out how to adjust the amount of produce in your notes after the events of the day: you got 5 more crates of bananas someone returned 2 crates of apples a worker dropped a crate of grapes (oh no! , you had to throw them out) you sold a crate of bananas you sold 5 crates of apples can you write an expression to describe your day using: "a" for crates of apples "b" for crates of bananas and "g" for crates of grapes? make sure the expression is in simplest form question 2 (3 points) explain your steps using sentences.