Louisa makes 4 identical cheesecakes and cuts each one into 8 equal slices. she gives 5 slices to her mum, 4 slices to her dad and 2 slices to her brother ! how many cheesecakes does she left ? give your answer as a mixed number .

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 .