Premise:
"However, the annual growth rate of bill mail is declining, whereas the annual growth rate of advertising mail is increasing fast."
Hypothesis: The yearly rate for bill mail is climbing faster than anything seen before.

no

Premise:
"Opinion was varied about the merits of Clinton's performance."
Hypothesis: The people had differing views regarding Clinton.

yes

Premise:
"It is relevant for assessing the sustainability of programs established by current law."
Hypothesis: Certain measures can be used to assess the sustainability of existing programs.
yes