The variable 'a' represents how much Arthur saves. Because D'John saves $8 per week (7 days), he saves $56. Arthur saves four times more than D'John so $56*4 equals Arthur's total savings for the week; $224.
a=$8(7)*4
a=$56*4
a=$224
C = 2 * (pi) * r
C = 2 * (pi) * 3.5.....3 1/2 = 3.5
C = (2 * 3.5) * (pi)
C = 7(pi) cm <===
No there are 16 oz in a pint so 16 x 8 = 128 and that is not 96 oz