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

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

To find the impulse generated by the contact between the tennis racket and the tennis ball, you need to use the equation:

Impulse (J) = Force (F) × Time (Δt)

Here, the force applied by the tennis racket is 30N and the contact time is 0.03s. So, the impulse generated can be calculated as:

J = F × Δt
= 30N × 0.03s
= 0.9 N·s (Newtons times seconds)

Therefore, the impulse generated in this scenario is 0.9 N·s.