How to make a word problem out of 5.4×10^6+6.25×10^7 in answers

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?