Ireally need with this btw adams high school 1200 jefferson high school 1500 madison high school 1000 lincoln high school 1300 grant high school 1000 if adams high and jefferson high both lose 100 students each, madison high's population stays the same, and both lincoln high and grant high gain 200 students each, what happens to the mean of the population of all 5 schools? a) the mean increases by 40. b) the mean decreases by 40. c) the mean remains the same. d) the mean increases by 200

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.