Respuesta :
Answer:
It took Kevin 26 minutes to run from markers 1 to 4
His average speed from mile markers 1 to 4 is 0.154 miles/minute
Kevin must run by average speed 0.1 miles/minute to finish the race
Explanation:
Lets explain how to solve the problem
A half marathon 13.1 miles
Kevin took 8 minutes to run from mile marker 1 to mile marker 2 and
18 minutes to run from mile marker 2 to mile marker 4
→ He took 8 minutes and 18 minutes to run from marker 1 to marker 4
→ The total time of the first 4 marker = 8 + 18 = 26 minutes
It took Kevin 26 minutes to run from markers 1 to 4
Average speed is total distance divided by total time
The average speed of Kevin as he ran from mile marker 1 to mile
marker 4 is the 4 miles divides by 26 minutes
→ Average speed = 4 ÷ 26 = [tex]\frac{2}{13}[/tex] = 0.154 miles/minute
His average speed from mile markers 1 to 4 is 0.154 miles/minute
It took Kevin 71 minutes to pass mile marker 9
Kevin need to complete the race in 112 minutes, then what must
Kevin's average speed be as he travels from mile marker 9 to the
finish line?
The total distance of the race is 13.1 miles, he ran 9 miles
→ The remaining distance = 13.1 - 9 = 4.1 miles
He must run 4.1 miles to complete the race
The total time is 112 minutes, he used 71 minutes to run the first 9 miles
→ The remaining time = 112 - 71 = 41 minutes
He must finish the 4.1 miles in 41 minutes
→ His average speed for the last part of the race = 4.1 ÷ 41 = 0.1 mi/min
Kevin must run by average speed 0.1 miles/minute to finish the race
Answer:
26 mins
0.1154 miles/min
0.1 miles/min
Explanation:
How long did it take Kevin to run from mile marker 1 to mile marker 4?
Kevin took 8 minutes to run from mile marker 1 to mile marker 2, and 18 minutes to run from mile marker 2 to mile marker 4.
Total = (8+18)=26 minutes
Answer(1): 26 minutes
What was Kevin's average speed as he ran from mile marker 1 to mile marker 4?
Distance from mile marker 1 to mile marker 4= (4-1)=3 miles. It took him 26 minute from mile marker 1 to mile marker 4.
Average speed= Total distance / total time= 3 / 26= 1/9=0.1154 miles per minute
Answer(2): 0.1154 miles per minute
71 minutes after starting the race, Kevin passed mile marker 9. To complete the race in 112 minutes, what must Kevin's average speed be as he travels from mile marker 9 to the finish line?
Total time 112 minute and already used 71 minutes.
Time left=41 minutes
Total distance 13.1 and already traveled 9 miles
Total distance left = 4.1 miles
Average speed = Total distance left / Time left = 4.1 / 41 = 0.1 miles per minute
Answer(3): 0.1 miles per minute
