Amixture of 650 lb. of cement, 1,300 lb. of sand, and 1,700 lb. of gravel is used gravel to pour one cubic yard of concrete. how many pounds of gravel will be used to pour 6 cubic yards of concrete?

The solution would be like this for this specific problem:

Take note that the most important given is 1,700lbs of gravel.

1700 lbs of gravel * 6 cubic yards of concrete

= 10,200

Therefore, 10,200 pounds of gravel will be used to pour 6 cubic yards of concrete.

- "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."

6e14 is the answer.