How does prior knowledge in profit and loss helped you changed your vision about running a business

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 .

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

The letters g e o r g i a are placed in a bag . if you picked a card and knew it was a vowel , what is the probability that it is an a ?