NEED HELP ASAP - 45 Pts. + BRAINLIEST for the best answer!!! (Please show your work)

Question:
When an 8kg mass is hung from a vertical spring, it stretches 12 cm. Calculate the spring constant “k”.

Ineed me i stuck and i don’t want to get it wrong

Determine whether the question is a statistical question. explain. 1. what is the eye of sixth grade students? 2. at what temperature (in degree fahrenheit) does water freeze? 3. how many pages are in the favorite books of students your age? 4. how many hours do sixth grade students use the internet each week? you!

What is 5 kilometers turned into meters