Your friend paid $60 for a ring at k-mart, where all jewelry is 70% off. What was the original price of the ring?

1. Your friend paid $60 for a ring at k-mart, where all jewelry is 70% off. What was the original price of the ring?
2. An item regularly priced at $18 is on sale for $12. Complete the following sentences
a. The sale price is _____% of the regular price
b. The sale price is _____% less than the regular price
c. The regular price is ____% more than the sale price.
3. The price of a savings certificate was $550 in may. It increased by 4% in july, and it decreased by 4% in july. What was the price after this decrease? Did you expect this answer? 
4. The population of the United States was 266 million at the beginning of 1997 and was increasing and was increasing at a rate of 0.7% per year. What would be today’s population size if we are using this constant yearly percentage growth rate? How does this compare with the actual numbers?