Is a bridge course before Calc AB necessary?

Without a more detailed description of the high school’s math courses and their prerequisite structure, no one here can give you a good answer.

Typical high school and college math content equivalencies:

High school (year course) College (semester course(s))
algebra 1 elementary algebra
geometry plane geometry
algebra 2 intermediate algebra
precalculus precalculus or college algebra + trigonometry
non-AP calculus calculus for business majors
AP calculus AB calculus 1
AP calculus BC calculus 1 + calculus 2
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