What is 57.8 divided by 81 estimate a whole number

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The answer is 1

Step-by-step explanation:

Since we are to divide 57.8 by 81

We will have to follow the normal calculation

So let's solve the problem

57.8/81

0.7135

Since we are to leave the answer in whole number,it means that the final answer is 1

How?

If the number next to the required position to round up is up to 5 and about...it will be rounded up as 1

So this same technique is applied here

Therefore the final answer is 1

72 is the answer to this problem

- "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."