now, we're assuming she made the deposit at the child's birth, namely when year was 0, at the child's twenty-first birthday that'll be 21 years later.

Answer:
Step-by-step explanation:
Center (0,0)
radius = √16 = 4
Answer:
No.
Step-by-step explanation:
It can be written as 2 81/100 or 281/100 so it is not irrational. An irrational number is a number that cannot be written as a ratio of two numbers