Monday

April 27, 2015

April 27, 2015

Number of results: 85,226

**Physics**

A tortoise can run at a speed of 20 cm/s and a hare can run exactly 20 times as fast. In a race, they both start at the same time but the hare stops to rest for 2.00 mins. The tortoise wins by 20.0 cm. How long does the race take? What is the length of the race?
*September 22, 2011 by JP*

**physics**

A tortoise can run with a speed of 0.12 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 1.0 minutes. The tortoise wins by a shell (30 cm). (a) How long does the race take? (b) What is the length of the race?
*January 29, 2012 by kris*

**Physics**

A tortoise can run with a speed of 0.13 m/s, and a hare can run 20 times as fast. In a race, they both start at the same time, but the hare stops to rest for 4.0 minutes. The tortoise wins by a shell (35 cm). (a) How long does the race take? (b) What is the length of the race?
*September 20, 2012 by Kelly*

**Physics**

A tortoise can run with a speed of 14.0 cm/s, and a hare can run exactly 15 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 min. The tortoise wins by 20.0 cm. (a) How long does the race take? s (b) What is the length of the race?
*February 7, 2013 by Nicola*

**Physics **

A tortoise can run with a speed of 10.1 cm/s, and a hare can run 19.4 times as fast. In a race, they both start at the same time, but the hare stops to rest for 122 seconds. The tortoise wins by a shell (20.8 cm). How long does the race take? What is the length of the race?
*February 2, 2012 by Stella *

**physics**

A tortoise can run with a speed of 11.5 cm/s, and a hare can run 21.4 times as fast. In a race, they both start at the same time, but the hare stops to rest for 126 seconds. The tortoise wins by a shell (18.3 cm). How long does the race take? What is the length of the race?
*August 25, 2012 by Simone*

**please someone answer this question**

A tortoise can run with a speed of 16.0 cm/s, and a hare can run exactly 25 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 min. The tortoise wins by 20.0 cm. (a) How long does the race take? (b) What is the length of the race?
*November 3, 2011 by joy*

**physic**

Hi, could you help me please Question: A tortoise can run with a speed of 0.12 m/s and a hare can run 20 times as fast. in a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shell (25cm). A.How long does the race takes...
*September 24, 2009 by Chan*

**college**

A tortoise can run with a speed of 0.10m/s and a hare can run 20 times as fast. In a race, they start at the same time, but the hare stops to rest for 2.0min. The tortoise wins by a shell (20cm). How long does the race take? What is the length of the race?
*February 2, 2010 by Whitney*

**Physics**

A tortoise can run with a velocity of 10 cm/s and hare can run 20 times as fast. In a race they start at the same time but the hare stops to rest for 2 minutes. The tortoise wins by 20 cm. What was the length of the race
*September 15, 2009 by Misha*

**Physic**

A speedy tortoise can run at 0.14m/s, and a hare can run 15 times as fast. In a race, they start at the same time, but the hare stops to rest for 2 min, so the tortoise wins by a shell(20cm). How long does the race take?
*September 1, 2011 by Domonique *

**physics**

A speedy tortoise can run at 0.12 m/s, and a hare can run 18 times as fast. In a race, they start at the same time, but the hare stops to rest for 1.5 min, so the tortoise wins by a shell (20 cm). How long does the race take? Answer in units of s
*September 11, 2014 by karen*

**physics**

A speedy tortoise can run at 0.08 m/s, and a hare can run 16 times as fast. In a race, they start at the same time, but the hare stops to rest for 2 min, so the tortoise wins by a shells(20cm). How long does the race take? Answer in units of s
*September 21, 2014 by alex*

**Physics**

A speedy tortoise can run at .01 meters per second, and the hare can run 21 times as fast. I. A race they start at the same time, but the hare stops for 1.5 minutes so the tortoise wins by a shell(20cm). How long is the race? How long is the path?
*January 13, 2011 by Rose*

**physics**

A speedy tortoise can run at 0.08 m/s, and a hare can run 15 times as fast. In a race, they start at the same time, but the hare stops to rest for 1.8 min, so the tortoise wins by a shell (20 cm). How long does the race take? Answer in units of s What is the length of the race...
*September 22, 2014 by JG*

**Physics**

A speedy tortoise can run at 0.09 m/s, and a hare can run 20 times as fast. In a race, they start at the same time, but the hare stops to rest for 2.4 min, so the tortoise wins by a shell (20 cm). How long does the race take? Answer in units of s What is the length of the race...
*September 19, 2012 by Joe*

**Physics**

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 15.5 m long. The bowler hears the sound of the ball hitting the pins 2.50 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s. How do i...
*October 15, 2010 by Lynmarie*

**english double checking **

5- If someone asked me what kind of tale this was I would say it is a folktale because it is passed on and told by a person. The tale also uses animals and teaches lessons. 8- In what ways are the stories "The Turtle and the Rabbit Run a Race" and "The Tortoise and the Hare" ...
*November 24, 2011 by Anonymous*

**Physics**

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing down with constant ...
*August 27, 2012 by David*

**physics**

The tortoise and the hare agree to a race. Of course, they are racing cars, having gotten tired of racing on foot. The tortoise, having just bought a new Mercedes AMG GT, allows the hare to have a running start in his Volkswagen Rabbit. The hare starts the race by getting up ...
*February 15, 2015 by Allie*

**Physics**

A hare and a tortoise compete in a race over a course 1.20 km long. The tortoise crawls straight and steadily at its maximum speed of 0.540 m/s toward the finish line. The hare runs at its maximum speed of 9.00 m/s toward the goal for 0.800 km and then stops to taunt the ...
*October 9, 2009 by Chloe*

**physics**

A hare and a tortoise compete in a race over a course 4.90 km long. The tortoise crawls straight and steadily at its maximum speed of 0.440 m/s toward the finish line. The hare runs at its maximum speed of 14.00 m/s toward the goal for 0.800 km and then stops to tease the ...
*September 9, 2012 by Kit*

**physics**

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 1.2 m/s2 for 4.3 seconds. It then continues at a constant speed for 11.7 seconds, before getting tired and slowing down with constant ...
*February 3, 2013 by gerry*

**Math (Number Theory)**

The tortoise and the rabbit were in a 42 kilometer marathon. The rabbit can run 5 times as fast as the tortoise. Less than halfway into the race, the rabbit dropped his lucky rabbit's foot, and so stopped to try and find it. After finding it, he started running to catch up ...
*April 1, 2013 by Hale*

**12th grade**

a tortoise and a hare are "running" in a race.you are asked to prepare graphs similar to those in your reading material to graph the process of each animal during the race.as in text,distance is the vertical scale of your graph and time is the horizontal scale.the tortoise ...
*September 15, 2010 by Anonymous*

**SCIENCE**

IF A TORTOISE AND A HARE ARE RUNNING IN A RACE. AND IN MY GRAPH I HAVE DISTANCE IN THE VERTICAL SCALE AND TIME IN THE HORIZONTAL SCALE. THE TORTOISE IS RUNNING AT A CONSTANT RATE WITHOUT STOPPING. BUT THE HARE IS CONFIDENT AND HE STOPS HOPPING AND WAITS FOR THE TORTOISE TO ...
*July 18, 2010 by Anonymous*

**science**

A tortoise and a hare are running in a race. You are asked to prepare graphs similar to those in your reading material to graph the progress of each animal during the race.As in the text, distance is the vertical scale of your graph and time is the horizontal scale. The ...
*January 7, 2010 by Babii Gurl*

**12th grade**

a tortoise and a hare are running in a race you are asked to prepare graps similar to those in your reading material to graph the progress of each animal during the race. as in the text, distance is the vertical scale of your graph and time is the horizontal scale. the ...
*February 24, 2010 by pam turner*

**math**

jen can run at 7.5 m/s and mary at 8.0 m/s. on a race track jen is given a 25 m head start, and the race eds in a tie. how long is the track? let x = distance run by jen. x + 25 = distance run by mary. time jen = d/r = x/7.5 time mary = d/r = (x+25)/8 Since they arrived at the...
*November 28, 2006 by joseph*

**math**

when tessa and fatima run a 100 metre race,tessa wins by 10m.then they repeat the race,this time with tessa starting 11m behind the starting line.if both girls run at the same speed as efore,what would be the expected result?
*July 21, 2013 by sarah*

**physics**

A hare is resting behind a rock, when he suddenly sees a tortoise cruising by at a constant 4.0m/s. The hare, literally at rest initially, decides he must catch up with the tortoise, to save face. So, he accelerates uniformly to 6.0m/s in 4.0 seconds. Once he reaches 6.0m/s, ...
*September 17, 2010 by Kyle*

**algebra**

The boys were 1/ 4 of the way across the bridge when they heard the sound of a train whistle. The train coming from behind them was moving at a speed of 45 mph. The boys immediately thought that they could turn around and run towards the near end of the bridge, and get to the ...
*March 11, 2008 by Dante*

**5th grade**

haretown and tortoiseville are 27miles apart. Hare travesl teh distance from haretown to tortoiseville at the rate of 7mph. Tortoise travels the distance from tortoiseville to haretown at the rate of 2mph. If both set out at the same time, how many miles will hare have ...
*September 16, 2010 by tryston*

**Physics**

The biggest stuffed animal in the world is a snake 420 m long, constructed by Norwegian children. Suppose the snake is laid out in a park as shown in the figure below, forming two straight sides of a 114° angle, with one side 220 m long. Olaf and Inge run a race they invent. ...
*September 24, 2014 by Lorine*

**Physics**

The biggest stuffed animal in the world is a snake 420 m long, constructed by Norwegian children. Suppose the snake is laid out in a park as shown in the figure below, forming two straight sides of a 114° angle, with one side 220 m long. Olaf and Inge run a race they invent. ...
*September 24, 2014 by Lorine*

**english**

Hi, I only need help in the questions. "The Turtle and the Rabbit Run a Race," #38 Swapping Stories Bel Abbey, Elton, Louisiana I'm going to tell you about the story about the Rabbit and the Turtle running a race. They were going to run a race one time. And Rabbit run so fast ...
*November 24, 2011 by Anonymous*

**english **

Hi, I was wondering if I answered the questions bellow correctly(after the story)and I really need help in fixing my grammar :| thank you :) "The Turtle and the Rabbit Run a Race," #38 Swapping Stories Bel Abbey, Elton, Louisiana I'm going to tell you about the story about the...
*November 23, 2011 by zahra*

**Algebra 2**

a tortoise crawling at a rate of 0.1 mph, the hare wants to rest 30 more minutes before chasing the turtle at 5 mph. how many feet must the hare run to catch the turtle?
*September 14, 2012 by Anonymous*

**Physics**

The hare and the tortoise are at the starting line together. When the gun goes off, the hare moves off at a constant speed of 10 meters per second. (Ignore the acceleration required to get the animal to this speed.) The tortoise starts from a dead stop, but accelerates at a ...
*October 2, 2014 by Sean*

**Math**

Is the time it takes to run a 100-meter race a function of the speed you run?
*February 10, 2011 by Please help*

**algebra**

Two persons are to run a race, but one can run 10 meters per second, whereas the other can run 6 meters per second. If the slower runner has a 70-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?
*October 28, 2012 by Anonymousjm*

**algebra**

Two persons are to run a race, but one can run 8 meters per second, whereas the other can run 2 meters per second. If the slower runner has a 99-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?
*May 6, 2014 by Quencie*

**scienced**

how does the race betweebn the tortoise and the the hare the differencde between average speed and instantaneous speed ?
*September 11, 2011 by brianna*

**algebra**

tortious and hare race traveling at the same speed the tortoise finishes first. The toroise travels in a steady strate line begins at zero goes 32 miles in 50 minutes how would I write this in an equation
*January 7, 2013 by Nathan*

**math**

Anthony decided to run one mile every 5 days. John decided to run two miles every 6 days. If they both start on Saturday, April 14, when will they both run on the same day again?
*March 13, 2012 by Help D:*

**math**

Anthony decided to run one mile every 5 days. John decided to run two miles every 6 days. If they both start on Saturday, April 14, when will they both run on the same day again?
*March 14, 2012 by Anonymous*

**Math**

Adam can run a lap on a certain circular track in 50 seconds. Grampy Sampy can run a lap on this track in 90 seconds. They start at the same location at the same time and move in the same direction. If they each run at a constant speed, how many seconds will it take before ...
*May 8, 2013 by Nate Williams*

**physics**

Adam can run a lap on a certain circular track in 50 seconds. Grampy Sampy can run a lap on this track in 90 seconds. They start at the same location at the same time and move in the same direction. If they each run at a constant speed, how many seconds will it take before ...
*May 13, 2013 by kathy wong*

**maths**

lan completed part of a race and had 2000m left to run.if he had completed 3/5 of the race,what is the total distance he had to run? Let the total distance be x m since he completed 3/5 of the race, he still has 2/5 of the race to run, but this is supposed to be 2000 m then (2...
*April 3, 2007 by shiva*

**trig.**

Jack and Jill ran a 400 meter race. Jill ran therace in 50 second and won by 5 meters; that is Jack had run only 295 meter when Jill crossed the finish line. They decide to race again,but this time Jill starts 5 meters behind the starting line. Assuming the both runner run at ...
*December 7, 2007 by Anonymous*

**Science**

A tortoise and a hare are running in a race. You are asked to prepare graphs similar to those in your reading material to graph the progress of each animal during the race.As in the text, distance is the vertical scale of your graph and time is the horizontal scale.
*April 27, 2010 by Judy*

**Oligopoly**

Does the shut down run rule apply to oligopolies in the same way as it does to perfectly competitive companies for both the short run and the long run?
*February 27, 2010 by Kiersyn*

**Physics**

A sprinter starts from rest in a 100-meter race, accelerates to his full running speed of 10.3 m/s in 1.15 seconds (assume constant acceleration) and continues at that speed for the rest of the race. (a) How far did he run before attaining his full speed? (b) What was his ...
*September 16, 2010 by Phil*

**Math**

Lisa can run a mile in 8 minutes.Which is the most resonable time for her to run a 10-km race?
*October 2, 2014 by Jocelyn*

**Intro Physics Help **

A runner in a relay race is required to run a distance of 20 m, pick up tbaton, and then turn back to the start. the runner must then run back past the starting point to a location 10 m beyond start, pick up a second baton, turn around and run past start again to a second ...
*August 28, 2014 by Lydo*

**science**

you run 100m in 25's. if you later run the same distance in less time , does your average speed increase or decrease? explain.
*April 14, 2013 by karen*

**Math**

Jill and Matt run on a 400-meter-long oval track. They each run 10 laps daily and both run in the same lane. One day, they begin at the same point, but ran in opposite directions. Jill ran at a constant speed that was 2 meters per second faster than Matt's constant speed. Jill...
*October 22, 2008 by Natalie*

**math problem**

Both Al and Bill must run from their positions to point C and then on to D. They start at the same time and each runs at a constant speed . When Bill gets to point C Al has passed there and is 40 yards towards D. If point D is ____ yards from C, they will arrive at point D at ...
*February 19, 2013 by Mike*

**physics**

6. You have kinetic energy when you run. If you run three times as fast, you'll have a kinetic energy ____________________. A) 3 times as much. B) 6 times as much. C) 9 times as much. D) that is the same. E) None of these.
*February 21, 2012 by britches*

**Physics **

In a 100 m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.6 s. Accelerating uniformly, Maggie took 2.20 s and Judy 2.90 s to attain maximum speed, which they maintained for the rest of the race. A) What was Maggie's acceleration? B) What was Judys ...
*February 2, 2012 by Emily*

**Math**

Three pigs entered a race around a track. Piggly takes 6 minutes to run one lap. Piglet takes 3 minutes to run one lap and it takes Wiggly 5 minutes to run one lap. If all three pigs begin the race at the same time, how many minutes will it take for all three pigs to be at the...
*September 25, 2012 by Braydon*

**PHYSICS**

A student is running at her top speed of 4.6 m/s to catch a bus, which is stopped at the bus stop. When the student is still a distance 38.9 m from the bus, it starts to pull away, moving with a constant acceleration of 0.177 m/s^2. A) For how much time does the student have ...
*July 13, 2011 by Luan *

**Math**

Ted and Ben took part in the same race. When Ted finnished the race in 25 min., Ben had only run 5/8 of the distance. Ben's average speed was 75m/min SLOWER than Ted's. What is Ted's average running speed? Speed=Ditance/time
*December 3, 2008 by Mary*

**math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that correct?
*October 23, 2012 by Mark*

**Math**

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that correct?
*October 23, 2012 by Mark*

**physics**

a hare can run 100m in 5 seconds what is its speed
*January 17, 2011 by tom turner*

**math**

1. A grayhound's maximum speed is 39.35 mph how long does it take to run a quarter mile? 2. A human's maximum speed is 27.89 mph how long does it take to run a quarter mile? 3. A giant tortoise's maximum speed is 0.17 mph how long does it take to run a quarter mile 4. A three ...
*September 11, 2014 by megan*

**physics**

A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.3 m. The dog is running with a speed of 9.0 m/s and catches the cat after 6.7 s. How fast did the cat run? I see that the velocity and time are given, so does ...
*September 16, 2011 by angela*

**Physics**

Two runners have a race. The first runner decides to run with his full speed v₁=9 m/s over the 250 meters of the race and then slows to v₂=7 m/s for the rest, since he's tired. The second runner wants to save energy, so he runs with v₃=8 m/s for the whole ...
*April 30, 2013 by Arnau*

**math**

I have 1 question I just can't seem to solve:A rabbit and a tortoise started walking from the same place at the same time. The rabbit walked to the east for 3 hours at a speed of 20m/h and took a rest for 1 hour. Then it walked to the west for 2 hours at a speed of 15m/h. The ...
*November 23, 2011 by Howler*

**Physics**

You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 21.0%, you are running at the same speed she is. If your mass is 77.0 kg, what is her mass?
*February 10, 2013 by Jake*

**relativity**

A runs at speed 4c=5 toward B, who is at rest. C is between A and B. How fast should C run so that she sees both A and B approaching her at the same speed? i have tried this but not sure we have to use relativity i thing. else without that i solved and got 2c/5.
*October 23, 2014 by sophie*

**english **

Hi, I need help fixing my grammar in the following: I'm going to tell you a story about a rabbit, and a turtle running a race. One sunny day the rabbit was running fast, and hopping around quickly showing off as usual; you know how rabbits are but the slow turtle can hardly ...
*November 29, 2011 by zuz*

**science**

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He continues at this rate ...
*October 21, 2009 by :)*

**science**

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He continues at this rate ...
*October 21, 2009 by :)*

**science**

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He continues at this rate ...
*October 22, 2009 by :)*

**science**

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He continues at this rate ...
*October 22, 2009 by please help(:*

**displacement...**

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He continues at this rate ...
*October 22, 2009 by :)*

**Physics Again**

In 1954 the English runner Roger Bannister broke the four minute barrier for the mile with a time of 3:59.4s (3 min and 59.4 sec) In 1999 the Morroccan runner Hicham set a record of 3:43.13s for the mile. If these two runners had run in the same race, each running the entire ...
*September 14, 2008 by DELLI*

**math**

at 8:00am the smiths left a campground, driving at 48 mi/h. at 8:20am the garcias left the same camp ground and followed the same route, driving at 60 mi/h. at what time did they overtake the smith's? How far did the Smiths drive from 8 a.m. to 8:20 a.m.; i.e., in 20 minutes? ...
*November 28, 2006 by jennifer*

**physics!!!!!!!!!!**

If you ever watch track and field at the Olympics, you'll notice that the starting points of the runners are not even if the race is run on a curve and the runners have to run in lanes. This is to offset the fact that the distances along each lane are unequal on a curve. To ...
*February 13, 2013 by please help me out!!!!*

**physics..............**

If you ever watch track and field at the Olympics, you'll notice that the starting points of the runners are not even if the race is run on a curve and the runners have to run in lanes. This is to offset the fact that the distances along each lane are unequal on a curve. To ...
*February 14, 2013 by please help me out!!!!*

**physics**

2 runners accelerate from rest to their top speeds. The 1st runner pat has an acceleration of 5.9 m/s^2 and reaches her top speed in 4 sec. The second runner steven accelerates at 4.4m/s^2 and takes 6.5 sec to reach his top speed the 2 runners run flat out for the remainder of...
*December 20, 2012 by ty*

**physics **

A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.6 m. The dog is running with a speed of 8.9 m/s and catches the cat after 6.9 s. How fast did the cat run?
*September 24, 2014 by Alexis*

**math**

Perry and Barry ran an 120-meter race. When Barry crossed the finish line, Perry had run only 105 meters. Then they ran a second race, with Barry starting 15 meters behind the starting line. Assuming that both runners ran at the same pace as in the first race, who won the ...
*September 28, 2013 by Anonymous*

**Physics**

Two football players start from rest, 12 m apart. They run directly towards each other, both players accelerating. The first player has an acceleration of 5 m/s^2 and the second has an acceleration of 4 m/s^2. a) how much time passes before they collide? b) at the instant they...
*October 10, 2011 by Courtney*

**math**

All our streets run north-south or east-west, and the shop is 6 blocks east and 8 blocks north.I lost both races.The first tim, i rode directly east for 6 blocks and then directly north for 8 blocks.the next time i tried zig-zagging.both times he was laughing when i got there ...
*November 11, 2010 by drwls please help me new info.*

**Physics**

It takes you 13.5 minutes to run 8 full laps around a 400m track. Find your average speed and average velocity for the run, both in m/s.
*December 3, 2012 by Skylar*

**Biomechanics**

John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a speed of 4.2 m/s until the last 200m, which he covers at 4.5 m/s. At what average speed must Al run to beat John?
*September 27, 2013 by Walter*

**Miceoecon**

Cell phones have become very popular. At the same time, new technology has made them less expensive to produce. Assuming that the technological advance caused cost curves to shift downward at the same time that demand was shifting to the right, draw a graph or graphs to show ...
*February 20, 2010 by MICHELLE*

**Basic Biomechanics**

John and Al are in a 15 km race. John averages 4.4 m/s during the first half of the race and then runs at a speed of 4.2 m/s until the last 200 m, which he covers at 4.5 m/s. At what average speed must Al run to beat John?
*September 29, 2013 by Walter*

**math question**

Four race car drivers participate in a race on a loop track. All four are going at a constant speed. Assume that they did a ying start. That is, all four crossed the start line at the same instant while each was going their constant speed. Then they continue driving forever ...
*October 29, 2010 by sami*

**math**

Four race car drivers participate in a race on a loop track. All four are going at a constant speed. Assume that they did a flying start. That is, all four crossed the start line at the same instant while each was going their constant speed. Then they continue driving forever ...
*October 29, 2010 by Ja*

**Economics**

Cell phones have become very popular. At the same time, new technology has made them less expensive to produce. Assuming that the technological advance caused cost curves to shift down-ward at the same time that demand was shifting to the right, draw a graph or graphs to show ...
*April 26, 2010 by Kysha*

**Algebra**

Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
*November 16, 2012 by Kevin*

**Physics**

If 100 m sprinters accelerate from rest for 3.5 s at 2.8 m/s^2, how far have they run to this point? How long will it take them to complete the 100 m sprint, assuming they maintain their speed the rest of the way? I found the distance, which is 17 m, and the distance they ...
*September 30, 2010 by Emily*

**math**

Benjamin and Bob are marathon runners on a run from landmarks P to Q. Benjamin runs half the way and walks the other half. Bob runs half the time, and walks the other half. The two run at the same speed and walk at the same speed. Who finishes first?
*September 22, 2014 by j*

**Algebra**

Jan can run at 7.5 m/s. On a race track Jan is given a 25m head start, and the race ends in a tie. How long is the track?
*November 16, 2012 by Kevin*