Access Application to SQL

I come from a Networking background so please excuse if this is a really straight forward question as I have no experience of Access or VB and am on a steep learning curve with this project. I am trying to convert a old Access application into a SQL Database with a Visual Basic Web Front end. One of the things I want to do is to change the Access queries to SQL Views. I have been successful with a converting quite a few of them but the 3 statements below are confusing me I have used the help on SQL and the Net to look for answers but am still not getting anywhere. Any Help would be extremlly usefull also a brief explaination of where I am going wrong.

Select Package,
IIf([CertificateSent],"Yes","No") AS [Certificate Sent], -- (I Know I need to use the case statement here but I am expecting a value to = something ELSE '' not just Yes, No)
Sum([Activity]* 1000^[ActivityFactor]*[Quantity]) AS [Total Activity], -- (Dont understand the ^ function yes I have used the help but still dont get it )
[PackageNumberType] & "/" & [PackageNumberYear] & "/" & Format([PackageNumberMonth],"00") & "/" & Format([PackageNumberSequence],"000") AS [Package Number], , (I know I need to replace the & with + but its the format function for the package Numbersequence thats troubling me I try to format it as a string but still get the error message 'Format' is not a recognized built-in function name.)
FROM tblCustomer INNER JOIN tblContentType
RIGHT JOIN tblPackageContent ON tblContentType.ContentTypeID = tblPackageContent.ContentTypeID
RIGHT JOIN tblPackage