Friday

April 25, 2014

April 25, 2014

Number of results: 1,099

**MATH**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 45 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 2 minutes later? Rate = km/min The vertical...
*Tuesday, March 6, 2007 at 9:51pm by Jia*

**Airplane & Radar**

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr, find the speed of the ...
*Thursday, December 15, 2011 at 5:08pm by math*

**PRECALCULUS**

An airplane is flying at a speed of 250 mph at an altitude of 4 miles. The plane passes directly above a radar station at time t=0. Find the distance s between the plane and the radar station after 5 minutes.
*Friday, May 27, 2011 at 3:03pm by OSCAR*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and figured out I need to ...
*Sunday, March 4, 2012 at 9:06pm by Daniel*

**calculus**

A plane flying with a constant speed of 23 km/min passes over a ground radar station at an altitude of 5 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 7 minutes later?
*Thursday, February 25, 2010 at 6:10pm by angel*

**Calculus**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 8 km and climbs at an angle of 20 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 2 minutes later?
*Monday, March 1, 2010 at 9:26pm by Danny*

**math**

A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 7 km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 5 minutes later?
*Tuesday, May 24, 2011 at 9:48am by Alexandra*

**Calculus**

A plane flying with a constant speed of 4 km/min passes over a ground radar station at an altitude of 5 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 4 minutes later?
*Friday, October 7, 2011 at 9:11pm by Anonymous*

**calculas**

A plane flying with a constant speed of 19 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 25 degrees. At what rate is the distance from the plane to the radar station increasing 3 minutes later? The distance is increasing at
*Saturday, October 26, 2013 at 6:04pm by Anonymous*

**Caculas**

(Airplane & Radar) An airplane is flying (horizontally) at the height of 6 km on a flight path that will take it directly over a radar tracking station (on ground). If the distance D between the plane and the radar is decreasing at a rate of 300 km/hr, find the speed of the ...
*Friday, December 16, 2011 at 6:17am by matthew*

**Calculus**

A plane flying with a constant speed of 5 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 10 minutes later? I got it down to [250-20cos...
*Friday, September 25, 2009 at 12:28am by Z32*

**calculus**

shortly after taking off, a plane is climbing at an angle of 30° and traveling at a constant speed of 640 ft/sec as it passes over a ground radar tracking station. At that instant of time, the altitude of the plane is 1000 ft. How fast is the distance between the plane and the...
*Tuesday, October 18, 2011 at 8:35pm by Anonymous*

**Calc**

A plane that is flying horizontally at an altitude of 6 kilometers and a speed of 680 kilometers per hour passes directly over a radar station. How fast is the distance between the plane and the radar station increasing when the distance between the two is 9 kilometers
*Tuesday, October 20, 2009 at 4:39pm by Georgia*

**calculus**

A plane that is flying horizontally at an altitude of 6 kilometers and a speed of 570 kilometers per hour passes directly over a radar station. How fast is the distance between the plane and the radar station increasing when the distance between the two is 14 kilometers
*Monday, October 28, 2013 at 12:52am by Matr*

**calculus**

a plane flying horizontally at an altitude of 2 mi and a speed of 460 mi/h passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 5 mi away from the station.
*Thursday, November 17, 2011 at 8:01am by L.J*

**Calc**

A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*Sunday, November 8, 2009 at 9:55pm by Peter*

**Cal**

A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*Thursday, November 11, 2010 at 3:42pm by Jordan*

**math cal**

A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.)
*Wednesday, November 17, 2010 at 7:35pm by anna*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 560 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. (Round your answer to the nearest whole number.)
*Tuesday, October 2, 2012 at 10:56am by Anonymous*

**Calculus**

A rocket is launched into the air verically is tracked by a radar station on the ground 3 km from the launch site. What is the veritcal speed of the rocket at the instant when the distance from the radar station is 5 km and this distance is increasing at a rate of 5 000km/hr...
*Sunday, December 10, 2006 at 12:08am by Thomas*

**Calc**

How do I do this related rates problem? A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (...
*Tuesday, November 10, 2009 at 6:04pm by Derick*

**MATH**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? You should draw out a ...
*Thursday, March 8, 2007 at 9:34pm by jimmy*

**Calculus test tomorrow**

A plane flying with a constant speed of 24 km/min passes over a ground radar station at an altitude of 5km and climbs at an angle of 35 degrees. At what rate, in km/min, is the distance from the plane to the radar station increasing 4 minutes later? I know side A=5 but how do ...
*Thursday, March 8, 2007 at 11:28pm by jimmy*

**Calc**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be something like d= t . a...
*Sunday, September 19, 2010 at 11:41pm by Chelsea*

**Calculus**

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. b) Express the distance s between the plane and the radar ...
*Tuesday, September 21, 2010 at 1:44pm by Chelsea*

**calculus**

A drone aeroplane is flying horizontally to a constant height of 4000 ft above a fixed radar tracking station. At a certain instant the angle of elevation theta is 30 degrees and decreasing, and the speed of the aeroplane is 300 mi/h a) How fast is theta decreasing at this ...
*Tuesday, April 24, 2012 at 11:53pm by Paige*

**physics**

A plane is found by radar to be flying 5.9 km above the ground. The angle of elevation from the radar to the plane is 78.6°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
*Thursday, March 13, 2014 at 5:04pm by eric*

**Math**

A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?
*Wednesday, May 8, 2013 at 12:36pm by Grace*

**Calculus**

At a given moment, a plane passes directly above a radar station at an altitude of 7 miles. (a) If the plane's speed is 400 mph, how fast is the distance between the plane and the station changing half an hour later? (b) How fast is the distance between the plane and the ...
*Sunday, November 4, 2012 at 6:00pm by Anna*

**Calculus**

RP^2=RQ^2 + QP^2 -2(RQ)*(QP)cosQ (1) QP = 24 (km/min) t (2) Diffentiate both sides w.r.t. the time t: 2 RP* d Rp/dt = 2 t [24 (km/min)]^2 -2(RQ)* 24 (km/min) cosQ (3) Using (1) and (2) you find out what RP is at t = 4 minutes. You plug that into (3) and solve for d Rp/dt. A ...
*Tuesday, November 14, 2006 at 8:36pm by Count Iblis*

**Math**

Can someone please go over the steps to solve this problem? I know I need to find where the tugboat intersects the radar but I'm not sure exactly how to do this. A radar buoy detects any boats within a radius of 12 miles. A tugboat starts at a location 18 miles SOUTH and 10 ...
*Wednesday, August 17, 2011 at 11:28pm by Lily*

**Calculus**

A rocket fired straight in the air is being tracked by a radar station 3 miles from the launching pad. If the rocket is travelling at 2 miles per second, how fast is the distance between the rocket and the tracking station changing at the moment when the rocket is 4 miles in ...
*Wednesday, April 9, 2014 at 1:59pm by Nate*

**Calculus**

A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 7 km and climbs at an angle of 45 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 2 minutes later? I know you use law of ...
*Saturday, October 14, 2006 at 2:09am by Michael*

**Science**

1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 2. For the radar above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the radar installation
*Tuesday, November 13, 2012 at 5:20pm by Caroline*

**biology**

9. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 10. For the radar in #9 above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the radar ...
*Wednesday, November 14, 2012 at 12:11am by doranda *

**rate of change**

A missile rises vertically from a point on the ground 75,000 feet from a radar station. If the missile is rising at the rate of 16,500 feet per minute at the instant when it is 38,000 feet high, what is the rate of change(in radians per minute) of the missile's angle of ...
*Sunday, December 10, 2006 at 12:29pm by Jen*

**Trigonometry**

You are stationed at a radar base in Warner Robins, GA and you observe an unidentified flying object at an altitude of 2000 m flying towards your radar base at an angle of 20 degrees. How far away from the radar base is that plane (hypotenuse)?
*Sunday, January 24, 2010 at 10:37am by Jake*

**Physics**

A police radar has an effective range of 1.0 km, and a motorist's radar detector has a range of 1.9 km. The motorist is going 100km/h in a 80km/h zone when the radar detector beeps. At what rate must the motorist decelerate to avoid a speeding ticket?
*Friday, September 6, 2013 at 5:11pm by Amber*

**Calculusss heeelp plzzz **

A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from the radar post .it then travels at the constant speed of 12000 km/h...
*Monday, March 21, 2011 at 1:45pm by Rahat*

**Calculus**

A radar antenna is located on a ship that is 4km from a straight shore. It is rotating at 32rev/min. How fast does the radar beam sweep along the shore when the angle between the beam and the shortest distance to the shore is pi/4? Let's say that the shoreline is y, are we ...
*Friday, April 9, 2010 at 6:08am by sh*

**physics**

b. If you are cruising down the road at 50 mph and a policeman with a radar gun (wavelength 1 cm) reflects radar light off your bumper, what wavelength of radar light does he get back? Assume the policeman is stationary, and you are moving towards him. Light that gets ...
*Sunday, April 15, 2012 at 11:38pm by DJ*

**trigonomentry**

Ada travels from A on a bearing of 60˚ to station B on a distance of 15km.she then leaves to station C 10km away from B due east of station
*Sunday, March 2, 2014 at 10:06am by anna*

**operations management**

Trucks are required to pass through a weighting station so. ... a weighting station so that they can be checked for weight violations. Trucks arrive at the station at the rate of 40 an hour between 7:00 p.m. and ... How many trucks would you expect to see at the weighing ...
*Monday, January 23, 2012 at 8:45pm by Anonymous*

**physics**

A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm. a)Find the frequency of this radiation. b)Find the time required for a pulse of radar waves to reach an airplane 4.8 km away and return.
*Sunday, April 29, 2012 at 5:35pm by Kristie*

**physics**

A radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 4 cm. Calculate the frequency of this radiation in Hz. Calculate the time required for a pulse of radar waves to reach an airplane 4.0 km away and return.
*Sunday, July 1, 2012 at 10:04am by LL*

**Operations Management 10th edition**

The three station work cell illustrated in Figure S7.7, has a product that must go through one of the two machines at station 1 (they are parallel) before proceeding to station 2. Station 1-Machine A-Capacity: 20 units/hr Station 2-Capacity: 5 units/ Station 3-Capacity: 12 ...
*Wednesday, April 25, 2012 at 5:34pm by Shelley *

**Physics**

3.A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 3 cm. a) Show that the frequency of this radiation is 10 GHz. b) Show that the time required for a pulse of radar waves to reach an airplane 5 km away and return is 3.3 x 10...
*Wednesday, May 12, 2010 at 12:36pm by Anonymous*

**physics**

A certain radar installation used to track airplanes transmits electromagnetic radiation of wavelength 7 cm. (a) What is the frequency of this radiation, measured in billions of hertz (GHz)? __________GHz (b) What is the time required for a pulse of radar waves to reach an ...
*Friday, November 9, 2007 at 3:52pm by emily*

**Math**

An airplane is flying at an altitude of 6 miles and passes directly over a radar antenna. When the plane is 10 miles away, the radar detects that the distance is changing at a rate of 240 mph. what is the speed of the plane? This is an implicit differentiation problem
*Monday, May 13, 2013 at 4:57pm by Chloe*

**calculussCalculuss ( pleassee heelp )**

Your Open QuestionShow me another » Calculuss homeworrk heelp? A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from the ...
*Friday, March 18, 2011 at 1:45pm by Alisha*

**calculus help.Pleaseee(thankyou guys for helping **

Your Open QuestionShow me another » Calculuss homeworrk heelp? A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from the ...
*Thursday, March 17, 2011 at 11:00am by tara*

**math**

Airport Surveillance Radar (ASR) tracks planes in circular region around an airport. What is the circumference covered by the radar if the diameter of the circular region is 120 nautical miles? Round your answer to the nearest unit. (C=Pi x d) Pi= 3.14
*Saturday, September 1, 2012 at 9:41am by Anonymous*

**calculus**

a rocket is launched vertically and travels at 100 meters per second. a tracking radar is 500 meters from the launch site. when the rocket is 800 meters high, how fast must the radar antenna tilt( in radians) in order to track the rocket?
*Monday, November 19, 2012 at 4:50pm by amy*

**Phyics**

A ship is first seen on a radar screen to be 13 km east of the radar site. Some time later, the ship is at 16 km northwest. What is the displacement of the ship from the first location it is seen at?
*Thursday, September 9, 2010 at 3:43pm by G*

**Trigonometry**

A ship is passing thru the island of corregidor. At its closest point of approach radar determine that it is 2,400 m away. Later the radar determines that it is 2,650 m away . a.)By what angle did the ship's bearing from corregidor change ? b.)How far did the ship travel but ...
*Monday, December 3, 2012 at 7:04pm by Lelouch*

**physics**

An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 23.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station in 210 m long. (a) How long is the nose of the train in the station? (b) How fast is ...
*Sunday, January 26, 2014 at 1:04am by Melissa*

**college physics**

An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 23.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station in 210 m long. (a) How long is the nose of the train in the station? (b) How fast is ...
*Saturday, January 25, 2014 at 2:10am by Melissa*

**Physics**

A streetcar named Desire travels between two stations 0.59 km apart. Leaving the first station, it accelerates for 10.0 s at 1.0 m/s2 and then travels at a constant speed until it is near the second station, when it brakes at 2.0 m/s2 in order to stop at the station. How long ...
*Saturday, January 14, 2012 at 2:16pm by Sarah*

**physics**

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______ times as great as the ...
*Monday, September 13, 2010 at 3:42pm by Joey*

**pROBABILITY AND STATISTIC..HELP...................**

a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be detected if n=2 and n=4
*Tuesday, February 26, 2013 at 2:58am by Rrjey*

**Physics (Help Please)**

An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
*Tuesday, April 8, 2014 at 8:52pm by Christian*

**College Physics**

An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
*Thursday, April 10, 2014 at 12:33pm by Christian*

**Algebra 2 (Distance Problem)**

A train leaves Union Station for Central Station, 216 km away, at 9 A.M. One hour later, a train leaves Central Station for Union Station. They meet at noon. If the second train had started at 9 A.M., and the first train at 10:30 A.M., they would still have met at noon. Find ...
*Wednesday, October 5, 2011 at 12:24am by Peter*

**crim j**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. While in...
*Monday, October 11, 2010 at 2:43pm by ash*

**Physics**

While traveling to school at 27 m/s your car runs out of gas 15 hm from the nearest gas station. If the station is 16m above your current elevation, how fast will the car be going when it reaches the gas station? Ignore friction.
*Tuesday, December 7, 2010 at 9:37pm by Ben*

**Math**

To chart the movement of a polar bear, scientists attached a radio transmitter to its neck. Two tracking stations are monitoring the radio signals from the bear. Station B is 10 miles directly east of station A. On Monday, station A measured the direction to the bear at N43E,...
*Tuesday, March 24, 2009 at 2:39am by Suz*

**physics**

A train whistle emits a sound with a frequency of 1000 Hz when standing in the station. If the same whistle is blown when it is moving away from the station at 40 mph what will be the approximate frequency someone standing at the station will hear?
*Monday, April 25, 2011 at 1:00am by Anonymous*

**trig**

Two tracking stations are on the equator 134 miles apart. A weather balloon is located on a bearing of N 38°E from the western station and on a bearing of N 19°E from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
*Wednesday, March 28, 2012 at 11:26am by Anonymous*

**Pre Cal**

Two tracking stations are on the equator 158 miles apart. A weather balloon is located on a bearing of N 41degrees E from the western station and on a bearing of N 21degrees E from the eastern station. How far is the balloon from the western station.
*Monday, April 9, 2012 at 2:53pm by Kara*

**math**

a cb radio station c is located 3 mi from the interstate highway h. the station has a range of 6.1 mi in all directions from the station. if the interstate is along a straight line, how many miles of highway are in the range of this staion?
*Tuesday, May 15, 2012 at 9:46pm by jay*

**Algebra**

A word processing station was purchased by a company for $10,000. After 4 years it is estimated that the value of the station will be $4000. If the value in dollars V and the time the station has been in use t are related by a linear equation, find the equation that relates V...
*Wednesday, September 12, 2007 at 11:18pm by Jesus T.*

**Math**

Hello, I need help with a 5th grade math question. The red train returns to central station every 45 min. The blue train returns to central station every 60 min. If both trains leave the station together, in how many min. will they both be back at the station at the same time?
*Monday, April 16, 2012 at 6:57pm by Ardine*

**physics**

A non stop bus goes from one station to another at a speed of 54 km/h. The bus returns from the second station to first station at a speed of 36 km/h. Find the average speed of the bus.
*Sunday, July 3, 2011 at 12:07pm by anil*

**math**

customers arrive at a 3 gas station at an exponential rate 20 cars per hour.however customers will only enter the station for gas if som gas pumps are free.suppose that tthe amount of time required to service is exponential with a mean of five minutes for each pump A) what is ...
*Thursday, May 10, 2007 at 3:50pm by skl*

**college**

Defendant A was suspected of selling stolen property from his dorm room. An undercover campus police officer knocked on Defendant A’s door. And when answer, asked for an affordable radar detector. In response, defendant A said that he just got two new ones last night. While in...
*Monday, October 11, 2010 at 3:26pm by ash*

**relative velocity**

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 159km away. The radar antenna is pointing upward at an angle of 59.3 from the ground.Fine the x and y components(in km) of the position of the satellite ...
*Thursday, February 1, 2007 at 4:35pm by leann*

**PHYSICS**

An astronaut of mass 78.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.500 m/s. With the booster rockets no ...
*Wednesday, November 2, 2011 at 6:43pm by EDDY*

**physics**

'a weather station monitors a storm using a radar system. the radio wave pulse emitted is received back at the transmitter after 0.34 ms. the wavelength emitted was 5.6 cm and that received after reflection from the storm was 1 billionth of a meter longer. what information ...
*Sunday, April 14, 2013 at 8:42am by mmk*

**Physics**

Meteorologists track a storm using radar. The radar shows a storm centered 30km west of town. Ninety minutes later, it's 30km north of town. Let the +x-axis point east and the +y-axis north. Assuming the storm moved with constant velocity, find that velocity.
*Tuesday, February 4, 2014 at 12:51am by Marcus *

**Physics **

An astronaut of mass 84.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.570 m/s. With the booster rockets no ...
*Tuesday, April 8, 2014 at 1:57pm by Jason*

**trig**

Two tracking stations are on the equator 135 miles apart. A weather balloon is located on a bearing of N 37 degrees E from the weastern station and on a bearing of N 19 degrees E from the eastern station. How far is the balloon from the weastern station?
*Sunday, April 21, 2013 at 3:32pm by Taylor*

**Chemistry**

a radio station emits radiation at a wavelength of 2.90 m. what is the station's frequenct in megahertz?
*Wednesday, October 20, 2010 at 6:25pm by Raynique*

**Math 6th grade**

Story Problem - Factoring An "A" train leaves a subway station every 13 minutes. An "E" train leaves evry 9 minutes. If both trains just left the station on parallel tracts, when will both leave the station together again?
*Tuesday, February 19, 2013 at 3:46pm by Najmah*

**Social Studies**

The largest island in the world, locates near Canda is called______. I think it's Greenland
*Monday, November 28, 2011 at 4:20pm by Lance*

**Earth Science**

A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
*Tuesday, October 16, 2007 at 10:52am by Camron*

**question**

bus holds 66 people. Starts out empty. Picks up 1 person at the 1st station. 2nd person at the 2nd station 3rd person at the 3rd station and so on. No one gets off. After how many stations will fill up the bus Show your work- explain your thinking?
*Wednesday, January 21, 2009 at 10:00am by decker*

**Earth Science REPOST**

A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
*Wednesday, October 17, 2007 at 7:40am by Camron*

**physics**

train is approaching the station at a speed of 20m.s sounds a 220 hz horn. What frequency does an observer on the station platform hear
*Monday, February 28, 2011 at 11:08pm by drew*

**Physics**

A radio station uses broadcasting at 600 kHz. What is the wavelength of the signals emitted by the station (speed of light c=3×108 m/s)
*Tuesday, December 4, 2012 at 4:28am by Salem*

**Physics 12**

First question I'm having trouble with: -An arrow is shot at a target 60m away (horiz), and 24m high (vert) - [picture of uneven trojectary is given] Find the arrow's initial speed. Second one goes something like this: - Car is traveling 170km/h down a road, and a radar gun on...
*Tuesday, March 25, 2008 at 11:00pm by Joe Seppe*

**Physics**

I have a question about the International Space Station-Its been orbiting earth at 350km-If the radius of the earth is 6,370 km, what is the period of orbit for the Space Station? Secondly, if it was moved to a geosynchronous orbit, what would the new altitude of the station ...
*Wednesday, December 1, 2010 at 5:45pm by Julie*

**Calculus**

4. A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it ...
*Wednesday, April 7, 2010 at 9:52pm by MILEY*

**CALCULUS**

A gas station stands at the intersection of a north-south road and an east-west road. A police car is traveling towards the gas station from the east, chasing a stolen truck which is traveling north away from the gas station. The speed of the police car is 100 mph when it is 3...
*Thursday, April 8, 2010 at 2:21am by MILEY*

**Math**

A train leaves a station and travels north at a speed of 45mph. Four hours later, a second train leaves on a parallel track and travels north at 105 mph. How far from the station will they meet? The trains will meet ________ miles away from the station
*Wednesday, March 5, 2014 at 9:56pm by Pam*

**related rates**

After blast-off, a space shuttle climbs vertically and a radar-tracking dish, located 1000 meters from the launch pad, follows the shuttle. How fast is the radar dish revolving 10 sec after blast-off if at that time the velocity of the shuttle is 100 m/sec and the shuttle is ...
*Sunday, May 20, 2012 at 9:01pm by :)*

**8th grade math PLEASE HELP!**

At Eglinton subway station the 54 Lawrence bus leaves the station every 18 minutes. The 34 Eglinton Bus leaves every 30 minutes. The 28 Mt Pleasant Bus leaves the station every 11 minutes. Assuming the buses run 24 hours a day at what time interval do all three buses leave the...
*Wednesday, September 23, 2009 at 7:04pm by Katharine*

**Math**

At Eglinton subway station the 54 Lawrence bus leaves the station every 18 minutes. The 34 Eglinton Bus leaves every 30 minutes. The 28 Mt Pleasant Bus leaves the station every 11 minutes. Assuming the buses run 24 hours a day at what time interval do all three buses leave the...
*Wednesday, September 23, 2009 at 6:56pm by Katharine*

**Physics**

A train is sounding a horn of constant frequency shows down as it nears a station. What change in pitch is heard by a commuter standing in the station?
*Monday, May 3, 2010 at 8:20pm by Sylvia*

**microeconomics**

charlie loves watching teletubbies on his local public tv station,but he never sends any money to support the station during its fundraising drives.
*Saturday, December 7, 2013 at 10:10pm by denise*

**Math**

An “A” train leaves a subway station every 12 minutes. An “E” train leaves every 9 minutes. If both trains just left the station on parallel tracks, when will both leave the station together again?
*Thursday, November 29, 2012 at 5:09pm by Bell*

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