80.1 years, im not 100% sure of my answer though
Answer:
day
Step-by-step explanation:
6th grade and the final grade for this semester and the
30000mm÷10=3000cm
3000cm÷100=30m
Answer: 30m

The sign at the end changes because both sides of the equation are being divided by a negative number.
Area = (14 x 20) - ( 5 x 9)
Area = 280 - 45
Area = 235 square cm