Arectangle has a length of (3.2a 1 0.18b) centimeters. the width is half the length. sasha writes the expression (12.8a 1 0.72b) to represent the perimeter of the rectangle in centimeters. is sasha’s reasoning correct? explain.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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 .

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll