Roberto decides to take a first-aid class at the local red cross. the cost of the class is $20. he will pay an additional $5 for transportation to and from the class. in order to attend the class, roberto will lose three hours at his job, where he earns $8 per hour. what is roberto's opportunity cost for taking the first-aid class?

Simon, aged 10, is invited to a classmate's birthday party at an exclusive ski resort on march 15th. the day will include 4 hours of snowboarding, lunch and birthday cake. simon's mother checks a box on the invitation that says "yes, we will attend" and returns it to the classmate's address. unfortunately, they later don't attend the party when simon comes down with the flu. on march 17th, simon's mother receives an invoice in the mail from simon's classmate for $35 that says, "party no-show fee." can simon's classmate collect the fee?

Corrective action must be taken for a project when (a) actual progress to the planned progress shows the progress is ahead of schedule. (b) the technical specifications have been met. (c) the actual cost of the activities is less than the funds received for the work completed. (d) the actual progress is less than the planned progress.

Describe how to write a main idea expressed as a bottom-line statement