Use proportional reasoning to solve each of the problems below.  

1. At the zoo, three adult lions eat $250$ pounds of food a day. If two more adult lions joined the group, how much food would the zoo need to provide each day?

   Hint (a):

   Write a proportion comparing the number of lions and the pounds of food a day.

   Step (a):

   $\frac{3}{250} = \frac{5}{x}$

2. Byron can read $45$ pages in an hour. How long will it take him to read the new $700$-page Terry Cotter book?

   Hint (b):

   Write a proportion comparing the number of pages and time (in hours).