Question

Killer whales in the Pacific are about 2.6 m long at birth. They grow at a rate of about 0.38 m per year, up to the age of 10 or more years. A marine biologist finds and rescues a 5-meter-long killer whale stranded on a beach. Based on this information, how old is the whale?

Answer 1

5-2.6= 2.4
2.4/.38= 6.316
6.316

Answer is rounded, not 100% if this is correct but that is how I would solve.