Slack time is . ANSWER Unselected the latest an activity can be finished and still finish the project on time, as determined by the latest start time for all immediate successors Unselected the difference between an activities latest start time (LS) and earliest start time (ES) Unselected the earliest an activity can be started, as determined by the earliest finish time for all immediate predecessors Unselected the latest an activity can be started and still finish the project on time, calculated by subtracting the activity’s duration from its latest finish time Unselected I DON'T KNOW YET

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