Explain how a perpendicular bisector is used in justifying the SSS Triangle Congruence Theorem

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Asap! i'm not good math and i'm lost.

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year