# For problems 1 through 11, use the following sets. The set U is the universal set. 0- -32, - 8, -2, - 3, 1, 4, 16, 64) N-1,2,4,8) U= {-32,-8,-2, .. 1, 2, 100-, 8. 1004. 10003, 64) S-2245, 1000,, B16) 1. Write set B in roster notation. 2. Write set O in set-builder notation 3. Write the number of subsets of N in binary 4. Write the number of proper subsets of U in hexidecimal. 5. Convert each element of S to base-ten (decimal) 6. How many two-way intersections of the sets B. O. N u. and S exist? (e.g. Nno, ons, etc) 7. If -47

Question

I only need the explanation of number 9. I am not sure how to do it. Thanks