On a scale from 0 to 100 with 10 being not sure, 40 being somewhat sure, 70 being pretty sure, and 100 being very sure.
How sure are you that you solved the first problem?
(The one about Kara’s two–and–a–half hour car ride.)
How sure are you that you solved the first problem?
(The one about Kara’s two–and–a–half hour car ride.)