The temperature in Vancouver was recorded over a period of four hours. The equation y= -2x+43 describes the temperature over this time, where y is the temperature in F and x is the number of hours since measurements started. Which of the following statements correctly describes the temperature? A. It was 43 F after four hours, and is dropping by 2 degrees per hour.

B. It was -2 F when the temperature was first measured, and is rising by 43 degrees per hour.

C. It was -2 F after four hours, and is rising by 43 degrees per hour.

D. It was 43 F when the temperature was first measured, and is dropping by 2 degrees per hour.

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.