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.

ignore this my answer was wrong . Sorry
Answer:
3628800
Step-by-step explanation:
10*9*8*7*6*4*3*2*1=3628800
Answer:
70910 (c)
Step-by-step explanation:
You move the decimal point to the right each time.