When the code that follows is executed, a message is displayed if the value the user entersvar userEntry = (prompt("Enter cost:");if (isNaN(userEntry) || userEntry > 500 ) { alert ("Message");a. isn’t a number or the value in userEntry is more than 500b. isn’t a number and the value in userEntry is more than 500c. is a number or the value in userEntry is more than 500d. is a number and the value in userEntry is more than 500

Alex’s family members live in different parts of the world. they would like to discuss the wedding plans of one of their distant relatives. however, alex wants all the family members to talk to each other simultaneously so that they can make decisions quickly. which mode of internet communication should they use? a. blog b. email c. wiki d. message board e. instant messaging

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.

Using a conditional expression, write a statement that increments numusers if updatedirection is 1, otherwise decrements numusers. ex: if numusers is 8 and updatedirection is 1, numusers becomes 9; if updatedirection is 0, numusers becomes 7.