While driving on the highway, mason put his car on cruise control at 68 miles per hour. at this speed how long would it take him to drive 85 miles

Answer

Find out the at this speed how long would it take him to drive 85 miles .

To prove

Formula

As given

While driving on the highway, Mason put his car on cruise control at 68 miles per hour.

Here

Speed = 68 miles per hour

Distance = 85 miles

Put in the formula

Time = 1.25 hours

Therefore it take 1.25 hours to drive 85 miles .

- "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."

i think the correct option is the second option.