Let $\angle Q$ be an acute angle such that $\sin Q=0.91$ . Use a calculator to approximate the measure of $\angle Q$ to the nearest tenth of a degree.

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 .