Michael started a savings account with $300. after 4 weeks, he had $350, abd after 9 weeks, he had $400. what is the rate of change?

Step-by-step explanation:

The initial amount was $300 and the final amount $350.  This $50 change occurred in 4 weeks.  Thus, the rate of change was

  $50

= $12.50/week for the first four weeks

 4 wks

For the first nine weeks, the rate of change was

$400-$300          $100

= = $0.11/week.

       9 wks               9 wks

Note that this second result makes little sense.  Ensure that you have copied this problem down correctly.

Early definitions of health focused on illness. health was considered as nothing more than absence from disease. as medical and health experts received better training, they began to focus on prevention of illness and disease as well as treatment of people who were already sick.