Thursday

April 17, 2014

April 17, 2014

Number of results: 39,782

**calculus**

A plane is flying west at 500 ft/sec at an altitude of 4000 ft. The plane is tracked by a searchlight on the ground. If the light is to be trained on the plane, find the change in the angle of elevation of the searchlight at horizontal distance of 2000 ft.
*Wednesday, November 12, 2008 at 8:07pm by bill*

**math (algebra)**

0 ft altitude to 4,000 ft (I assume you made a typo) is an increase of 4,000 ft and a decrease of 7.4 degrees F. 4,000 ft to 8,000 ft is an increase of 4,000 ft and a decrease of 7.4 degrees. 8,000 ft to 12,000 ft is an increase of 4,000 ft and a decrease of 7.4 degrees. So, ...
*Sunday, May 3, 2009 at 4:32pm by RickP*

**trig**

I have this same question. It depends on how the question is read. Is the plane at an unknown hight 12,000 ft from the cliff? Or is the plane an unknown distance from the cliff flying at 12,000 feet? If the second then the cliff is 28,043.1 ft high. If the first AND we assume ...
*Monday, October 15, 2012 at 3:02am by Dana*

**physics**

an object falls from a plane flying horizontally at an altitude of 40,000 ft at 500 mi/h. How long will it take to hit the ground?
*Thursday, June 28, 2012 at 12:21am by wen*

**calculus**

A plane flying along a straight path loses altitude at the rate of 1000 ft for each 5200 ft covered horizontally. What is the angle of descent of the plane? (Round your answer to one decimal place.)
*Sunday, January 29, 2012 at 1:39pm by Sam*

**physics**

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...
*Sunday, March 20, 2011 at 1:04pm by HELP!*

**physics**

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...
*Saturday, March 19, 2011 at 5:17pm by please help!!!!*

**Calc**

Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 427 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000 ft.) Plane B is ...
*Tuesday, October 1, 2013 at 11:21am by Anonymous*

**Calc**

Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 427 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000 ft.) Plane B is ...
*Tuesday, October 1, 2013 at 11:27am by Anonymous*

**calculus**

Two commercial airplanes are flying at an altitude of 40,000 ft along straight-line courses that intersect at right angles. Plane A is approaching the intersection point at a speed of 429 knots (nautical miles per hour; a nautical mile is 2000 yd or 6000 ft.) Plane B is ...
*Thursday, September 27, 2012 at 7:00pm by Avi*

**Calculus**

A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of the cars at that ...
*Thursday, June 13, 2013 at 8:51pm by Mike*

**math**

A triangle has a base of 7 ft. and an altitude of 15 ft. Find its area to the nearest tenth. Choose the best answer from the options below: A 52.5 ft² B 53.5 ft² C 54.5 ft² D 55.5 ft²
*Saturday, May 21, 2011 at 12:59pm by makeeda*

**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*

**Trigonometry**

During takeoff, an airplane's angle of ascent is 16° and its speed is 300 feet per second. (a) Find the plane's altitude after 1 minute. (Round your answer to the nearest whole number.) ft (b) How long will it take the plane to climb to an altitude of 10,000 feet? (Round your ...
*Monday, November 22, 2010 at 12:45am by Jonathan*

**Calculus**

at time t>=300 (5 min = 300 sec) the man has gone 4t ft north, and the woman has gone 5(t-300) ft south. The distance d between them is thus d^2 = 500^2 + (4t + 5(t-300))^2 = 81t^2 - 27000t + 2,500,000 at t=15 min = 900 seconds, d = 6619 ft 2d dd/dt = 162t - 27000 so, at t=...
*Thursday, April 11, 2013 at 12:10pm by Steve*

**math (algebra)**

Water boils at 212 degrees F at sea level (altitude 0 ft), 204.6 degrees F at 40000 ft, 197.2 deg. F at 8000 ft, and 189.8 deg. F at 12,000 ft. Find a good model relating the boiling temperature t of water to the altitude a.Is the model linear or quadratic?
*Sunday, May 3, 2009 at 4:32pm by Layne*

**Engineering**

i did A=pi(1/48)^2=.0014 2.5 ft/sec * .0014ft .0035 ft^3 450 galmin/1 ft^3/sec * .0035 ft^3/sec*15 min = 23.625 gpm
*Monday, September 25, 2006 at 6:31pm by Matt to drwls*

**Calculus**

I do not agree with bobpursley's solution let the distance of the woman from the streetlight be x ft let the length of her shadow be y ft by ratios ... 5/y = 16/(x+y) 16y = 5x + 5y 11y = 5x 11 dy/dt = 5 dx/dt but dx/dt = 5.5 dy/dt = (5/11)(5.5) = 2.5 So her shadow is ...
*Tuesday, October 23, 2012 at 4:47pm by Reiny*

**Math**

one plane at 520 feet is ascending at the rate of 40 ft per minute, while another plane at 3800 ft is descending at the rate of 120 ft per minute. How long will it take the 2 planes to be at the same altitude?
*Tuesday, December 14, 2010 at 8:09pm by Anonymous*

**Calculus-rates**

1.) A man 6 ft tall walks at a rate of 5 ft per sec. from a light that is 15 ft above the ground. At what rate is the top of his shadow changing? 2.) An airplane flies at an altitude of 5 miles toward a point directly over an observer. The speed of the plane is 600 mph. Find ...
*Thursday, May 5, 2011 at 4:54am by Amy*

**science**

. A parachutist jumps from a plane at 8000 ft altitude with a 24-ft diameter chute. Total weight of the jumper and the chute is 185 lbs. Determine the time to fall from 8000 ft to 5000 ft using the average fall velocity between the two elevations.
*Saturday, February 12, 2011 at 2:44am by hassanian*

**math (altitude)**

An airplane flying at an altitude of 31,000 feet descends at a rate of 1,200 feet per minute. If the plane descends for 15 minutes, what would its altitude be in feet?: * 13,000 23,000 18,000 21,000
*Saturday, September 22, 2007 at 10:06am by anonymous*

**algebra**

let man's walking speed be x ft /s so speed with moving sidewalk = x+2 ft/s time taken to walk 93 ft on moving sidewalk = 93/(x+2) times taken to walk 12 ft in opposite direction = 12/(x-2) 93/(x+2) = 12/(x-2) 93x - 186 = 12x + 24 81x = 210 x = 210/81 ft/s = 70/27 or appr 2.59...
*Sunday, October 6, 2013 at 10:23pm by Reiny*

**Math**

volume = 100*10*40 ft^3 = 40,000 ft^3 correct However when doing units, make sure the ones you do not want cancel 40,000 ft^3 * (7.48 gal/ft^3) ft^3 on the top cancels ft^3 on the bottom and gallons are left so 299,200 gallons
*Wednesday, May 14, 2008 at 7:30pm by Damon*

**Algebra 2**

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) A package is thrown downward with an initial velocity of -...
*Sunday, April 29, 2012 at 1:07am by Kelsey*

**Calculus (math)**

A) 12,000 ft lb B) 9,600 ft lb C) 2,690 ft lb D) 14,500 ft lb
*Friday, April 26, 2013 at 12:17pm by Carl*

**AP CALCULUS**

A girl is flying a kite at a height of 320 ft. If the wind blows the kite horizontally at a rate of 15 feet per second away from the girl, at what rate is the girl releasing the string when the length of the string is 400 ft? [kite] <---15 ft/sec . . . . . . . . . . . . 320...
*Saturday, November 6, 2010 at 9:03pm by Naz*

**math**

50 miles/(1 hour) , -----> 1 mile = 5280 ft, 1 hr = 3600 seconds = 50(5280) ft/(3600 seconds) = 220/3 ft/sec = 73.333.. ft/sec = appr 73 ft/sec a quick estimate of miles/hr to ft/sec is to simply multiply the given mph by 1.5 ( 5280/3600) = = 1.47 or appr 1.5 )
*Tuesday, December 4, 2012 at 11:19pm by Reiny*

**Math**

The measurements of a meadow were taken at 30 ft intervals. Use Simpson's Rule to estimate the area of the meadow with the following measurements: 76 ft, 118 ft, 130 ft, 143 ft, 139 ft, 136 ft, 137 ft, 139 ft, 130 ft, 122 ft, 60 ft
*Tuesday, December 11, 2012 at 8:42pm by Savanah*

**math**

rate is in units of distance/time, as in ft/sec or mi/hr. you haven't stated what units the circumference is in. feet, km, miles, angstroms, what? Assume ft. rate = 10pi ft/10sec = pi ft/sec the last part of the question makes no sense to me...
*Tuesday, December 6, 2011 at 8:13pm by Anonymous*

**calculus**

A girl flies a kite at a height of 200 ft, the wind carrying the kite horizontally away from her at a rate of 4 ft/sec. How fast must she let out the string when the kite is 422 ft away from her? Answer = ft/sec.
*Thursday, September 27, 2012 at 7:00pm by Avi*

**word question in algebra**

oh i think i see instead of ft/miles because i changed the 13 miles to ft it would be 0.61 ft/ft An airplane covered 13 miles of its route while decreasing its altitude by 42,000 feet. Find the slope of the airplane's line of descent. Round to the nearest hundredth. [Hint: 1 ...
*Friday, April 13, 2007 at 12:37pm by carla*

**math**

One plane flies straight east at an altitude of 31,000 feet. A second plane is flying west at an altitude of 13,000 feet on a course that lies directly below that of the first plane and directly above the straight road from Thomasville to Johnsburg. As the first plane passes ...
*Tuesday, February 5, 2013 at 7:39pm by rachel*

**math**

One plane flies straight east at an altitude of 31,000 feet. A second plane is flying west at an altitude of 13,000 feet on a course that lies directly below that of the first plane and directly above the straight road from Thomasville to Johnsburg. As the first plane passes ...
*Tuesday, February 5, 2013 at 7:39pm by rachel*

**math**

One plane flies straight east at an altitude of 31,000 feet. A second plane is flying west at an altitude of 13,000 feet on a course that lies directly below that of the first plane and directly above the straight road from Thomasville to Johnsburg. As the first plane passes ...
*Tuesday, February 5, 2013 at 7:39pm by rachel*

**Math (check please)**

Foot (or feet) is for linear measurements, ft² for areas, and ft³ is required for volumes. A cord of wood measures the volume, obtained by multiplying: 8 ft x 8 ft x 2 ft = 8 x 8 x 2 x ft x ft x ft = 128 ft³ So the dimensions (units) are being multiplied as well.
*Tuesday, September 7, 2010 at 8:51pm by MathMate*

**calculus**

A 13 ft ladder is leaning against a house when its base begins to slide away. By the time the base is 3 ft from the house, the base is moving at the rate of 5 ft/sec. Answer the following: At what speed is the top of the ladder sliding down the wall at that time? Answer = ft/...
*Thursday, September 27, 2012 at 6:59pm by Avi*

**Math**

4. A rectangular prism measuring 7 ft by 8 ft by 4 ft. a. 224 ft^3 b. 112 ft^3 c. 232 ft^3 d. 116 ft^3
*Thursday, February 14, 2013 at 11:56am by The Dark Knight*

**Math**

one base of a trapezoid is 10 ft. long, the altitude is 4 ft., and the area is 32 sq. ft. find the length of a line parallel to and 1 ft. above the 10-ft. base and included between the legs of the trapezoid.
*Saturday, October 19, 2013 at 5:27am by Diana*

**Algebra 2**

A package is thrown downward with an initial velocity of -5 ft/sec from a helicopter at 300 ft. A) what is the height of the package in 2 sec? B) how long does it take to hit the ground? Round answer to 2 decimals Enter: blank ft,blank sec.
*Monday, April 30, 2012 at 5:47pm by Honey*

**math**

Find the volume of a pyramid whose base is 6 ft. by 5 ft. and has an 8 ft. height. Choose the best answer from the options below: A 50 ft³ B 60 ft³ C 70 ft³ D 80 ft³
*Saturday, May 21, 2011 at 12:57pm by makeeda*

**math**

A trapezoid has bases of 15 ft. and 9 ft. and a height of 8 ft. Find its area. Choose the best answer from the options below: A 95 ft² B 96 ft² C 97 ft² D 98 ft²
*Saturday, May 21, 2011 at 1:01pm by makeeda*

**geometry**

The Great Pyramid of Giza was built around the year 2560 BC. It was originally 481 ft high with a square base measuring 751 ft on each side. Its slant height was 611ft. Find the lateral surface area of the Great Pyramid. Round your answer to four significant digits. a. 90,430,...
*Sunday, May 2, 2010 at 8:55pm by nicole*

**Math**

An airplane approaches a runway at a 3 degree angle of depresssion. If the plane is flying at 30,000 ft., find the ground distance from the airport to the point directly below the plane when the pilot begins the descent. Round your answer to the nearest foot.
*Wednesday, January 30, 2013 at 11:07pm by dan*

**Math**

An airplane approaches a runway at a 3 degree angle of depresssion. If the plane is flying at 30,000 ft., find the ground distance from the airport to the point directly below the plane when the pilot begins the descent. Round your answer to the nearest foot.
*Wednesday, January 30, 2013 at 11:08pm by dan*

**Math**

a) new altitude x = 30,000 - 850.t b) x = 30,000 - 850.8 x = 30,000 - 6,800 x = 23,200 ft c) x = 30,000 - 850.t new altitude is 0 ft : 850.t = 30,000 t = 30,000 / 850 t = 35.29 min
*Sunday, January 12, 2014 at 9:55pm by Aranxta*

**physics**

A bomb is dropped from a plane flying at constant horizontal velocity at an altitude of 600m. Where is the bomb after 2 sec? 5 sec? 10 sec? what are the velocities said period?
*Wednesday, January 8, 2014 at 5:28pm by Anonymous*

**physics**

A bomb is dropped from a plane flying at constant horizontal velocity at an altitude of 600m. Where is the bomb after 2 sec? 5 sec? 10 sec? what are the velocities said period?
*Wednesday, January 8, 2014 at 6:12pm by Anonymous*

**Math**

On average, the temperature falls about 5.4 F for every 1,000 ft of additional altitude. If the temperature is 42 F on the ground estimate the temperature at 5,000 ft
*Saturday, April 27, 2013 at 6:07pm by Camille*

**physical science**

A rock tied to a string is swung around in a circle at a constant speed of 25 ft/sec. The length of the string is 1.765 ft. Calculate the acceleration. = _____ . 354.1 ft/sec2 350 ft/sec2 14.16 ft/sec2 14 ft/sec2
*Monday, June 27, 2011 at 6:59am by pat*

**math**

5 mi/hr = 5*5280 ft/3600 s = 7.3333 ft/s time = 160 ft/7.3333 ft/s = 21.8 sec
*Saturday, March 31, 2012 at 9:27pm by drwls*

**Math**

Assume the truck is standing still, then she must travel a total distance of (14+30)ft in 6 seconds speed = distance/time = 44 ft/6 sec 44 ft/6 sec = 440 ft/60 sec = 440 ft/min = 26400 ft/hr = 5 mi/hr So she must travel 5 mph faster than the truck, which was going at 50 mph So...
*Tuesday, February 2, 2010 at 6:56pm by Reiny*

**HELP!!! Math**

Width = X Ft. Length = 3X/2 Ft. Area = (3x/2) * X = 15,000 Ft^2 Multiply both sides by 2: 3x * x = 30.000 3x^2 = 30000 x^2 = 10000 X = 100 Ft^2. 3x/2 = (3*100)/2 = 150 Ft^2
*Wednesday, June 5, 2013 at 6:11pm by Henry *

**PHYSICS**

The weight of fully saturated soil in a prism having a 4.00 sq. ft. base (or a base of 4.00 ft*ft) is 4,000 lbs. Pore pressure at the base is 499 lbs/(ft*ft). True or False: The effective stress at the base is 501 lbs/(ft*ft).
*Saturday, February 26, 2011 at 2:09pm by dan*

**Physics**

Assuming our answer is to be in ft and sec, convert mi/hr to ft/sec 60 mi/hr * 5280ft/mi * hr/3600sec = 88 ft/sec v = at 88 = 6.5a a = 13.538 sec s = 1/2 a t^2 = 1/2 * 13.538 * 6.5^2 = 286 ft
*Thursday, September 22, 2011 at 4:54pm by Steve*

**Calculus**

Wheat is poured on the ground at a rate of 12 ft^3/s. The pile forms a cone whose altitude is always three fourths of the radius. Find the rate at which the altitude is increasing when the altitude is 6.0 ft.
*Saturday, March 10, 2012 at 1:48pm by Candy*

** Calculusss ( pleassee someboddy heelp )**

an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong plane is over the airport.?When will they be the...
*Friday, March 18, 2011 at 1:46pm by Alisha*

**calculus**

A woman 5.5 ft tall walks at a rate of 6 ft/sec toward a streetlight that is 22 ft above the ground. At what rate is the length of her shadow changing when she is 15 ft from the base of the light?
*Sunday, March 2, 2008 at 9:49pm by Anonymous*

**math**

A courtyard is shaped like a square with 250-ft-long sides. What is the distance from one corner of the courtyard to the opposite corner? Round to the nearest tenth. 353.6 ft 500 ft 433.0 ft 176.8 ft can someone show me how to do this?
*Wednesday, February 6, 2013 at 10:44am by Corie*

**Physics**

First convert speed to ft/second. 10 mph => 52,800 ft/3600 s = 14.67 ft/s w = Angular speed = V/R = (14.67 ft/s)/20 ft = 0.733 radians/sec.
*Tuesday, February 26, 2013 at 9:29pm by drwls*

**math**

The perimeter on the scale drawing would be 1 ft. + 1 ft. + 1 ft. + 1 ft. = ? ft The area would be 1 ft. * 1 ft. = ? ft.
*Tuesday, March 25, 2008 at 4:58pm by Ms. Sue*

**chem.**

A bird is flying around the world at a rate of 26.4 ft/sec. How many days will it take to complete its journey? (circumference of earth = 25,000 miles)
*Saturday, January 31, 2009 at 7:12pm by ashley*

**chemistry**

A bird is flying around the world at a rate of 26.4 ft/sec. How many days will it take to complete its journey? (circumference of earth = 25,000 miles)
*Tuesday, June 16, 2009 at 2:22pm by Anonymous*

**Calculus**

The area a meadow was approximated by measuring the length of the meadow at 30-foot intervals. THe distances measured across the meadow were 76 ft, 118 ft, 130 ft, 143 ft, 139 ft, 136 ft, 137 ft, 139 ft, 130 ft, 122 ft, and 60 ft. Use Simpson's Rule to approximate the area of ...
*Saturday, February 26, 2011 at 10:42pm by Lena*

**Math (Ms. Sue Please help!)**

A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane cruised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
*Wednesday, January 2, 2013 at 8:08pm by Kate*

**Math**

A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane crised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
*Wednesday, January 2, 2013 at 6:19pm by Kate*

**Anyone Please Help! **

A plane on a search mission flew east from an airport, turned, and flew west back to the airport. The plane cruised at 300km/h when flying east, and 400km/h when flying west. The plane was in the air for 7 hours. How far from the airport did the plane travel?
*Wednesday, January 2, 2013 at 8:14pm by Kate*

**math**

1st 10 Ft = $100. 2nd 10 Ft = $125. 3rd 10 Ft = $150. 4th 10 Ft = $175. 5th 10 Ft = $200. 6th 10 Ft = $225. 7th 10 Ft = $250. 8th 10 Ft = $275. 9th 10 Ft = $300. TOT. = $1800.
*Monday, July 9, 2012 at 7:08pm by Henry*

**Geometry**

A plane flying 16 degrees west of north at 289mph is flying in air which is moving 32mph at due west. Find the resulting speed and direction of the plane. (Step by step please!)
*Tuesday, September 24, 2013 at 9:34pm by George*

**MATH**

A carpenter wants to be sure that the corner of a building is square and measures 6.0 ft and 8.0 ft along the sides. How long should the diagonal be? A. 12 ft B. 10 ft C. 11 ft D. 14 ft
*Saturday, April 28, 2012 at 8:56pm by RICE*

**college**

A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5 miles and is going 500 ...
*Monday, December 6, 2010 at 4:08pm by Joshua*

**Algebra **

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is thrown upward with initial velocity of 96 ft/sec...
*Friday, April 27, 2012 at 1:49pm by Billy*

**Algebra 2**

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is thrown upward with initial velocity of 96 ft/sec...
*Saturday, April 28, 2012 at 11:39pm by Billy*

**calculus**

Q#1: From a point of O, two cars leave at the same time. One car travels west and after ‘t’ sec, its position is x=t2+t ft. the other car travels north and it covers y= t2+3t ft in ‘t’ sec. At what rate is the distance between the two cars changing after 5 sec? Question#2: ...
*Tuesday, October 19, 2010 at 11:34am by awesome*

**trig**

a plane flying 33,000 ft is 130 miles from the airport when it begins to descend if the angle of descent is constant find this angle
*Monday, October 1, 2012 at 8:31pm by gabby*

**Pre algebra**

44 ft/sec x 60 sec = 2640 ft/min 2640 ft/min x 60 mi/hr = 158,400 ft/hr 158,400 ft/hr / 5280 ft/mi = 30 mph
*Monday, January 24, 2011 at 9:53pm by helper*

**calculus**

26. A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5 miles and is going ...
*Monday, March 16, 2009 at 2:32am by jason*

**physical science**

If a car goes along a straight road heading east and speeds up from 45 ft/sec to 60. ft/sec in 5 sec, calculate the acceleration. = 3-3 ft/sec 2 NESn/aW Note: If the speed were given in miles per hour, and the time were given in minutes, you could change the minutes to a ...
*Monday, June 27, 2011 at 6:55am by pat*

**Calculus**

A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another 5 miles and is going 500 mph. At that moment, how fast is the distance between the ...
*Tuesday, November 11, 2008 at 11:19pm by George*

**Find force**

Find force in the strut: Wall is 20 ft high. Strut begins 4 ft lower, so the "altitude" of strut is 16 ft. "Base" of strut from wall to end of strut = 8 ft. strut is 12 ft on center There is a wind force against wall = 20 lb/ft ^2 Teacher said find wind force: w = (12 ft)(20 ...
*Wednesday, April 2, 2014 at 1:15pm by Please Need Help*

**math**

What is the conversion factor sequence for units from ft./sec. to km./hr.? Is (ft/sec) x (sec/min) x (min/hr) x (m/ft) x (km/m) correct?
*Tuesday, August 30, 2011 at 12:55pm by Lesley*

**Math**

What is the sequence of conversion factors for units if you change from ft/sec. to km/hour? Is it ft/sec x sec/min x min/hour x ft/m x km/m?
*Monday, October 10, 2011 at 5:01pm by Connie*

**Math**

Engine failure forced Robbin to pilot her Cessna150 to an emergency landing. TO land, Robbin's plane glided 17,000 ft over a 15,000-fot stretch of deserted highway. From what altitude did the descent begin?
*Sunday, July 22, 2012 at 11:21am by Wanda*

**5 Pre-Calculus Questions**

1. What is the value of x in the right triangle below? If needed, round your answer to two decimal places. 32 angle, 15 inches, find the x in base… 2. A 10-foot ladder is leaning up against the side of a building so that the top of the ladder reaches the top of the building. ...
*Thursday, June 30, 2011 at 5:17pm by Anonymous*

**Calculus help!**

“(1) A toy truck travels at a rate of 0.5t ft/sec after t seconds of travel (so after 6 seconds the truck is traveling 3 ft/sec). “ why is it going suddenly slower, you said it was going at .5 ft/sec.
*Monday, January 21, 2008 at 2:35pm by Reiny*

**Math: Homework Check! **

Can you check to see if my answers are correct. If wrong please explain why. 1. 3 ft = 36 L - S x (largest to smallest) THINK: 1 ft = 12 in 2. 72 in = 2 yd THINK: 36 in = 1 yd S - L / (/ means divide) 3. 93 ft. = 31 yd THINK: 3 ft = 1 yd S - L / 4. 500 yd = 1500 ft THINK: 1 yd...
*Wednesday, December 21, 2011 at 8:43pm by Lauren *

**Algebra**

Suppose you are tossing an apple up to a friend on a third story balcony. After t seconds, the height of the apple in feet is given by h = -16t^2 + 38.4t + .96. Your friend catches the apple just as it reaches its highest point. How long does the apple take to reach your ...
*Sunday, January 20, 2008 at 2:39pm by tchrwill*

**Calculus**

A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5 miles and is going 500 ...
*Wednesday, November 12, 2008 at 5:02pm by George*

**geometry**

find the volume of the right prism whose base is a right triangle with legs 3 ft and 4 ft and with a height (altitude) of theprism being 8 ft
*Monday, October 24, 2011 at 6:49pm by clarence*

**calculus**

an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the airport.?When will they be the ...
*Thursday, March 17, 2011 at 10:57am by tara*

**College Algebra**

A plane takes off from the ground at a 14-degree angle. After flying straight for 10,000 feet, what is the altitude of the plane?
*Tuesday, November 5, 2013 at 1:28pm by Keri*

**Math**

A plane flying at an altitude of 10,000 feet begins descending when the end of the runway is 50,000 feet from a point on the ground directly below the plane. Find the measure of the angle of descent (depression) to the nearest degree.
*Monday, October 29, 2012 at 4:28pm by Austin*

**college math 120**

50 ft per .63 sec = 79.3651 ft per sec 79.3651 ft per sec = 54.112568 mph every 10 ft the speed drops 9 mph, so 54.112568 mph - (5 x 9) = 9.112568 mph I'm not sure I understood the question completely, but I think this is the right answer.
*Tuesday, April 12, 2011 at 7:13pm by Aaron*

**calculus **

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Monday, April 1, 2013 at 6:43pm by Tom*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Tuesday, April 2, 2013 at 1:13am by T-Man*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Tuesday, April 2, 2013 at 2:52pm by tom*

**math**

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane is x miles from the ...
*Wednesday, April 3, 2013 at 3:02am by momo*

**Math**

A plane is flying at an altitude of 12,000 feet and is preparing to land at a nearby airport. The angle from the airport to the plane is 17. To the nearest tenth of a foot, how far is the airport from the plane?
*Sunday, March 4, 2012 at 1:00am by Valentino*

**Calculus**

A street light is at the top of a 17 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 6 ft/sec. How fast is the tip of her shadow moving when she is 50 ft from the base of the pole.
*Tuesday, October 8, 2013 at 11:59am by Nathan*

**Applying Algebraic Thinking to Data**

Snoopy is in his plane, 4500 ft above ground. he fires a projectile straight up. The Vo of the projectile is 340 ft/s. (after the projectile is fired, it has no acceleration, so its height can be modeled by a "falling body" model). The Red baron is maintaining a constant ...
*Friday, April 20, 2012 at 7:49pm by Rachelle*

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