A roller coaster ride in an amusement park employs which type of queuing system line structure?

An essential element of being receptive to messages is to have an open mind true or false

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500

Corporation had a japanese yen receivable resulting from exports to japan and a brazilian real payable resulting from imports from brazil. gracie recorded foreign exchange gains related to both its yen receivable and real payable. did the foreign currencies increase or decrease in dollar value from the date of the transaction to the settlement date?