Answer:
6.5 × 10¹¹
Step-by-step explanation:
I hope this helps you
Answer:
weeks
Step-by-step explanation:
Given
It takes 14 weeks to empty a lake
also it takes 20 weeks for a river to fill the lake
Part of lake empty in 1 week 
Part of lake filled in 1 week is 
And if both works simultaneously then


therefore it takes
weeks to fill it
Answer:
(1 - 2n)^3 equals
(1 -2n) * (1 -2n) * (1 -2n)
Step-by-step explanation: