In the figure below, AC and BD are diameters of circle P.
What is the arc measure of arc BC in degrees?

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 .

Secant be and cf intersect at point d inside a what is the measure of cde

Can someone tell me if this is perpendicular? !