Table:
text: Carvill Hurricane Index
Data
Table 1: Historical storms and the CHI (1998 to 2005)
Name_ Year_ Landfall NHC_Advisory_Number Vmph Rmiles Saffir_Simpson_Category CHI
Jeanne 2004 Florida 49B 115 70 3 8.0
Dennis 2005 Florida 25B 120 40 3 6.9
Katrina 2005 Florida 9 75 15 1 1.4
Katrina 2005 Louisiana 26A 145 120 4 19.0
Rita 2005 Texas 26B 120 85 3 9.9

Question: What is the CHI (Carvill Hurricane Index) if the NHC advisory number equals 49b?

Question: What are the miles if the Carvill Hurricane Index (CHI) equals 9.9?