What is the rate of change for this (someone me with the iready quiz i have 4 to d)

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick

Agallon of apple juice cost $7 a pack of eight 4.23oz box of apple juice $2.39 which is a better deal