If the dimensions of a rectangle are 4 cm x 9 cm, expressing using a power what the area of a square would be if the area of the rectangle = area of square.

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 .