The area of a rectangle is 0.8 square units. the length is 3.2 units and the width is x units.

what is the value of x?

x=0.25x=0.25

x=2.4x=2.4

x=2.56x=2.56

x=4

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?