a tennis raquet contacts a tennis ball for .03s and applies a force of 30N for that time. What is the impulse generated here?

Answer 1

Review the definition of impulse and it will become obvious what you need to do with the two numbers you have been given.

See definition no. 5 here:
http://www.thefreedictionary.com/impulse

It should also be defined in your textbook or class notes