Write a 10 digit number such that the first digit tells how many zeros

Write an explicit formula that represents the sequence defined by the following recursive formula:

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2