How is a calculation of net worth different from a day-to-day or month-to-month tallying of expenses?

Step-by-step explanation:

Net worth is the total assets - total liabilities of a business.

Normally assets will be more than liabilities and the difference is called net worth of the business.  

If net worth is negative, the company is insolvent.

But tallying day to day and month to month expenses means to reconcile the total expenses incurred with the cash going out and cheques issued. Thus this is in the course of business continuously for finding out whether all expenses are accounted for and correctly paid, etc.

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- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."