A boat travels 12.0m while it reduces it's velocity from 9.5m/s to 5.5m/s. What is the magnitude of the boats acceleration while it travels the 12.0m?

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

its c i just checked it