Final answer:
Andre will be 40 years old in the year 2028.
Step-by-step explanation:
To find the year when Andre will be 40 years old, we can calculate the difference between his current age and his 40th birthday. Andre's 11th birthday was in 1999, so we subtract 11 from 40: 40 - 11 = 29. Now we add 29 years to 1999: 1999 + 29 = 2028. Therefore, Andre will be 40 years old in the year 2028.