A cyclist travels north along a road at a constant speed of 28 miles per hour. At 1:00 P.M., a runner is 68 miles away, running
1 answer:
Answer:
The speed of the runner is 6 miles per hour.
Step-by-step explanation:
Given the distance between the cyclist and the runner is 68 miles.
Given the speed of the cyclist is 28 miles per hour.
Initial time is 1:00PM Final time is 3:00PM
Time elapsed is 3-1=2hours
Let the cyclist travel a distance of x miles,Then the distance travelled by the runner is 68-x miles.
for the cyclist
x=56 miles
the distance travelled by the runner is 68-56=12 miles
speed of the runner = 12/2 = 6 miles per hour
You might be interested in
Answer:
Eric's expression is :
and Andrea's is :
In Eric's expression, 20 represents the initial amount of substance with which he has started the experiment. is the amount of substance left after each time period (in this case, each week).The variable w in this case represents the number of weeks.
Andrea's expression can be written as :
The one outside of parentheses represents the initial amount of the substance. The one inside of parentheses represents 100% of the original amount of the substance. 0.5 represents the 50% of the substance that is lost each time period. The variable w in this case represents the number of weeks.