Pig eats 2.3 pounds of grain, grain costs 6.25 per pound, how much will it costs to feed one pig for 80 days

Step-by-step explanation:

Each pig eats: [ 2.8 pounds of grain / day ]

Cost of grain: [ $7.25 / pound of grain ]

[ $7.25 / pound of grain ] x [ 2.8 pounds of grain / day ] = [ cost to feed 1 pig for 1 day ]

+7.25%2A2.8+=+20.3+

This is:

$20.30 / 1 pig / 1 day

+20.3%2A60+=+1218+

The cost is:

$1,218 / 1 pig / 60 days

- "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."