Wednesday

April 16, 2014

April 16, 2014

Number of results: 48,861

**Trig**

A 16 - foot ladder leaning against the side of a house reaches 12 feet up the side of the house. What angle does the ladder make with the ground
*Sunday, September 23, 2012 at 5:02pm by Bri*

**Math**

a diagonal brace is to be placed in the wall of room, the height (y) of the wall is 8 ft and the wall is 16 ft long (x). What is the exact length of the brace?
*Thursday, August 22, 2013 at 3:32pm by Anonymous*

**physics**

If the coefficient of static friction is 0.350, and the same ladder makes a 64.0° angle with respect to the horizontal, how far along the length of the ladder can a 71.9-kg painter climb before the ladder begins to slip? The same ladder is 46.7 Newtons in weight and 10.4 ...
*Saturday, October 23, 2010 at 6:49pm by heather*

**math**

The bottom of a ladder is placed 4 feet away from a house and it reaches a height of 16 feet on the side of the house. What is the slope of the ladder?
*Tuesday, February 4, 2014 at 10:55pm by :)*

**Math**

the wall, ground, and ladder form a righ triangle, with the ladder as hypotenuse, so, x^2 + 4^2 = 12^2 supplementary angles add up to 180 degrees. So, x + 3x+2 = 180 one angle is x, the other is 3x+2. Solve for x, and you're almost there.
*Wednesday, March 19, 2014 at 4:04pm by Steve*

**Calculus**

A fence 5 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? [Hint: Determine the length of a ladder that touches the ...
*Monday, June 22, 2009 at 12:59am by Z32*

**Geometry**

Need to use a ladder to reach a window that is 8 meters above the ground. The base of the ladder will be 6 meters from base of the building. How long must the ladder be?
*Tuesday, August 28, 2012 at 8:18pm by Des*

**diffirential calculus**

Make a diagram showing the two corridors and the ladder just fitting into the corner You should have two similar right-angled triangles. Label the hypotenuse of the one triangel L1 and the hypotenuse of the other L2 then L1 + L2 = 27 label each of the bottom left angles Ø let ...
*Sunday, September 25, 2011 at 12:17am by Reiny*

**Math**

Martin is painting his house and needs to reach a point 9 feet above the ground. He places a 10.5-foot-long ladder against the house so that it forms an angle of with the ground. a. Describe the triangle that is formed by the ground, the house, and the ladder. Identify the ...
*Wednesday, May 29, 2013 at 7:20pm by Tigerlilly*

**physics**

vertical = 480+840 = 1320 horizontal force equal and opposite to force at top exerted by wall, F moments about base of ladder F*16*sin61 = 480*8*cos61 +840*4.2*cos61 13.99 F = 1862+1710 F = 255 = hor. force on ladder base toward wall
*Monday, April 12, 2010 at 2:32am by Damon*

**Calculus 1**

Let the foot be x ft from the wall, let the angle formed by the ladder at the ground be Ø given: dx/dt = 2 ft/s find: dØ/dt when x = 5 x/10 = cosØ x = 10cosØ dx/dt = -10sinØ dØ/dt when x=5, height^2 + 5^2 = 10^2 height = √75 2 = -10(√75/10) dØ/dt dØ/dt = - 2/√...
*Tuesday, December 7, 2010 at 10:20am by Reiny*

**Math ~ Check Answers ~**

So... is the 1st one is correct? A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. •3.8 ft^3 •60 ft^3 <<<<<< •15 ft^3 •10.4 ft^3
*Wednesday, March 12, 2014 at 2:17pm by Chloé*

**Calculus**

make a sketch showing the ladder touching the fence and making contact with the wall. let the angle at the base of the ladder be ß draw a horizontal from the top of the fence to the wall, then the angle the ladder makes with that line is ß, giving up 2 similar right-angled ...
*Monday, June 22, 2009 at 12:59am by Reiny*

**trig**

A 15 FOOT LADDER MAKES 52 DEGREES ANGLE WITH THE GROUND.HOW FAR WILL THE TOP OF THE LADDER BE ABOVE THE GROUND?
*Friday, October 19, 2012 at 1:21am by GLAIZY JEAN*

**Calculus**

A trough is 15 ft long and 4 ft across the top, as shown in the figure. Its ends are isosceles triangles with height 3 ft. Water runs into the trough at the rate of 2.5 ft^3/min. How fast is the water level rising when it is 2 ft deep?
*Thursday, February 6, 2014 at 1:02am by Charlie*

**college math**

Find the area of the trapezoid l = 23 ft l = 15 ft h = 12 ft Would the formula be A = 1/2 x 12(23+15) the answer being 276 ft
*Friday, June 1, 2012 at 6:44pm by Lourane*

**math**

You want to produce a scale drawing of your living room which is 24 ft by 15 ft. IF you use a scale of 4 in+ 6 ft, what will be the dimensions of your scale drawing? I think it's 4 ft by 2.75 ft. Is this right?
*Friday, November 23, 2007 at 4:01pm by keisha*

**Consumer Math**

The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. What is the perimeter of the carpet?____feet
*Tuesday, July 16, 2013 at 1:11pm by DG*

**solid mensuration**

A prism measuring 5 ft tall with a triangular base whose sides measures 7 ft, 3 ft, and 9 ft. In the base, the distance from the 9 ft side to the opposite vertex is 2 ft.
*Tuesday, March 18, 2014 at 7:27am by Anonymous...*

**smith**

The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. What is the area of the carpet?
*Monday, June 17, 2013 at 12:08pm by tiffany*

**Math**

Mr.Brown is building a slide for his kids. The ladder is 3 meters tall ad the slide is 5 meters long. What is the distance between the ladder and the bottom of the slide?
*Monday, April 22, 2013 at 8:49pm by Anna*

**geometry**

a ladder is placed next to a building to get to the top. the bottom of the ladder is placed 7 feet away from the building at an angle of 56 degrees.how tall is the building?
*Tuesday, January 29, 2013 at 11:00pm by jenna*

**calculus**

A street light is mounted at the top of a 15-ft-tall pole. A man 6 ft tall walks away from the pole with a speed of 7 ft/s along a straight path. How fast is the tip of his shadow moving when he is 45 ft from the pole? ft/s
*Friday, November 9, 2012 at 6:02pm by kela*

**math**

a ladder is leaning againt the side of a building. The ladder is 10 feet away from the building and touches the building at a point 24 feet above the base. How long is the ladder?
*Wednesday, March 7, 2012 at 9:53pm by mary ann*

**Calculus**

If the pen has to be joined to the whole side of the barn, there goes 130 ft. He/she has only 30 ft left for the two sides. The dimensions are therefore 15 ft * 130 ft = 1950 sq.ft. There is no calculations involving calculus, unless I have misinterpreted the question.
*Thursday, November 18, 2010 at 8:08pm by MathMate*

**calculus**

Draw a diagram. Let x be the distance from the wall to the ladder's foot. Let y be the length of the ladder. Let θ be the angle the ladder makes with the ground. tanθ = 10/x secθ = y/(x+8) tan^2θ + 1 = sec^2θ 100/x^2 + 1 = y^2/(x+8)^2 or, y^2 = (x^2+...
*Wednesday, February 8, 2012 at 1:03am by Steve*

**Calculus**

A 23 foot ladder is leaning on a 6 foot fence. The base of the ladder is being pulled away from the fence at the rate of 7 feet/minute. How fast is the top of the ladder approaching the ground when the base is 6 from the fence? [Note: The ladder is protruding over the top of ...
*Thursday, October 13, 2011 at 10:20pm by Isiah*

**Physics**

Draw the figure. You have the following equations that you can write: a) Sum Vertical Forces=0 b) Sum horizontal forces=0. Remember that at the upper part of the ladder, there is a horizontal force (only). c) Sum of moments about any point, I suggest the base of the ladder as...
*Thursday, May 31, 2007 at 12:20pm by bobpursley*

**College Algebra**

A ladder is 1 foot longer than its vertical heigt along the side of the house. The distance of the base of the ladder from the house is 7 feet less than its vertical height from the ground. How far up the house does the ladder reach?
*Monday, May 9, 2011 at 7:28pm by Victoria*

**Physics**

A 100-kg box is suspended from two ropes; the left one makes an angle of 20degrees with the vertical, and the other makes an angle of 40degrees. What is the tension in each rope. I think I've got the basics: I have Fx=T1(x) + T2(x)= 0 to calc the first tension, and Fy= T1(y...
*Friday, April 22, 2011 at 9:35am by Stephanie*

**math**

Convert --→ 48 in = _____ ft. Choose the best answer from the options below: A 3 ft B 4 ft C 5 ft D 6 ft
*Saturday, May 21, 2011 at 12:56pm by makeeda*

**physics**

You can either use a formula or construct a table. You should get the same answer. If the falling object drops 2.65 feet the first second, the value of the accleration of gravity there is g' = 5.3 ft/s^2. In t = 10 seconds, use the formula Y = (g'/2)*t^2, with g' = 5.3 ft/s^2 ...
*Thursday, July 26, 2012 at 5:26pm by drwls*

**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*

**8th grade math**

firefighters have a 35 foot extension ladder. In order to reach 30 feet up a building, how far away from the building should the foot of the ladder be placed? Express your answer in simplest radial form a^2+b^2=c^2 30^2+x^2=35^2 900+x^2=1225 -900 -900 x^2=325 square root of x^...
*Monday, March 3, 2014 at 5:39pm by diane*

**pre-calculus**

Josh fires a catapult 18 ft above the ground with an initial velocity of 25 ft/sec. The misslie leaves the catapult at an angle of degree theta with the hoizontal and heads toward a 40 ft wall 500 ft from the launch site. If the missle is fired at a 20 degree angle, does it ...
*Sunday, June 2, 2013 at 6:23pm by Peter*

**math**

Find the perimeter of the figure given below 10.5 ft 6.3 ft 3.2 ft 7.4 ft 5.8 ft"
*Wednesday, October 10, 2007 at 10:05am by lyric*

**physics**

All of the weight of ladder and person are balanced by the normal force F at the lower contact point, since the upper contact point is frictionless. F = 1100 N At the slipping condition, the friction force at the bottom is the maximum allowed by static friction, which would be...
*Thursday, June 10, 2010 at 8:42am by drwls*

**math**

A rectangular field is to be enclosed with 1130 ft of fencing. If the length of the field is 65 ft longer than the width, then how long is the field? A) 380 ft B) 315 ft C) 335 ft D) 250 ft
*Friday, June 22, 2012 at 11:51am by chchch*

**Math**

A rectangular field is to be enclosed with 1270 ft of fencing. If the length of the field is 75 ft longer than the width, then how wide is the field? A) 430 ft B) 355 ft C) 280 ft D) 385 ft
*Thursday, July 12, 2012 at 9:17pm by chchch*

**math**

Convert --→ 73 yd = _____ ft. Choose the best answer from the options below: A 19 ft B 119 ft C 109 ft D 219 ft
*Saturday, May 21, 2011 at 12:55pm by makeeda*

**Math**

A ladder 65 feet long is leaning against a wall. Its lower end is 25 feet away from the wall how much farther away will t be if the upper end is moved down 8 feet?
*Friday, February 3, 2012 at 9:44pm by Talia*

**Math**

A ladder 65 feet long is leaning against a wall. Its lower end is 25 feet away from the wall how much farther away will t be if the upper end is moved down 8 feet?
*Friday, February 3, 2012 at 9:44pm by Talia*

**algebra**

Direct and Joint Variation 2. The volume V of a rectangular prism of a particular height varies jointly as the length l and the width w, and V = 224 ft when l = 8 ft and w = 4 ft. Find l when V = 210 ft and w = 5 ft.
*Monday, January 26, 2009 at 7:15pm by bob*

**math**

Direct and Joint Variation 2. The volume V of a rectangular prism of a particular height varies jointly as the length l and the width w, and V = 224 ft when l = 8 ft and w = 4 ft. Find l when V = 210 ft and w = 5 ft.
*Monday, January 26, 2009 at 7:10pm by bob*

**math**

You want to produce a scale drawing of your living room, which is 24 ft by 15 ft. If you use a scale of 4 in=6 ft, what will be the dimensions of your scale drawing. I think the dimensions are 16 ft by 10 ft. Is this right?
*Saturday, November 24, 2007 at 11:30am by keisha*

**math**

A 50 foot ladder is placed against a building so that it touches a point 40 feet above the ground. The distances ( in feet ) from the foot of the ladder to the building is a. 10 b. 20 c. 30 d. 45 e. 60 please answer and explain
*Sunday, April 6, 2014 at 4:30pm by thomas*

**pornography**

The diagonal of a rectangular room is 52 ft long. one wall measures 28 ft longer than the adjacent wall. Find the dimensions of the room.
*Friday, July 27, 2012 at 4:11am by !@#$%^&*

**math**

An 8 ft wall stands 27 ft from a building. Find the length of the shortest straight beam that will reach to the side of the building from the ground outside the wall.
*Friday, August 10, 2012 at 5:47am by rolan*

**math**

In drawing: length of wall = 10/6 ft = 20 inches height of wall = 8/6 ft = 16 inches
*Wednesday, May 1, 2013 at 7:12pm by Reiny*

**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**

13. 42 ft 14. 656 ft 15. 34 ft 16. 906 m
*Monday, March 8, 2010 at 1:37pm by J*

**rpi**

For the stepladder shown in Fig. 12-51, sides AC and CE are each 3.34 m long and hinged at C. Bar BD is a tie-rod 0.662 m long, halfway up. A man weighing 746 N climbs 2.51 m along the ladder. Assuming that the floor is frictionless and neglecting the mass of the ladder, find...
*Monday, November 15, 2010 at 1:47am by Anonymous*

**physics**

I assume this is a step ladder. I think F1 = force up on the left side of the ladder from the floor F2 = force up on right side of ladder from floor F3 = weight of man down F4 = weight of ladder down. F1 and F2 are separate because they will not be equal and must be calculated...
*Wednesday, December 1, 2010 at 5:01pm by Damon*

**math**

This platform has 6 rectangular faces. Two of them are 1 ft by 6 ft Two of them are 1 ft by 4 ft Two of them are 4 ft by 6 ft Find the area of all rectangles.
*Tuesday, April 9, 2013 at 9:04pm by rbowh*

**physics**

I'm just having trouble setting up this problem. It's based on a picture so I'll describe it: There is an open ladder standing on the floor with a person on the third step on one side. There is a crossbar attached to the two sides of the ladder and the floor is frictionless. I...
*Wednesday, December 1, 2010 at 5:01pm by Meghan*

**geometry**

You are buying a ladder for your 30-foot-tall house. for safety, you would like to ensure that the base of the ladder be placed at least 8 foot from the base of the house. What is the shorest ladder you can buy in order to be able to reach to top of your house?
*Saturday, March 3, 2012 at 9:24pm by kim*

**math**

A firefighter stood on the middle rungs of a ladder ,spraying water on a burning house. He then climbed up 6 rungs before the heat of the flames caused him to come down 10 rungs.After some minutes he was able to climb 18 rungs to the very top of ladder .How many rungs did the ...
*Wednesday, October 6, 2010 at 11:10pm by Thanh*

**Math**

The top of the building forms an angle of 45 degrees with the top of the ladder... I believe the question means the top of the building makes 45 and 60 degrees with the horizontal, and not the building itself (i.e. from bottom to top). In this case, the distance from the ...
*Wednesday, July 15, 2009 at 12:57pm by MathMate*

**Geometry**

I have this much so far (1+x)/9 = 2/5 or x = 13/5 = 2.6 ft I am unsure of how to work out the rest of the problem. A wooden board is placed so that it leans against a loading dock to provide a ramp. The board is supported by a metal beam perpendicular to the ramp and placed on...
*Sunday, September 26, 2010 at 1:37am by Anna*

**math**

You're not actually multiplying. Sorry. 24 ft by 15 ft Divide each by 1.5 so that it fits our conversion factor (1.5 ft = 1 in). 24/1.5 = 16 inches Do the same thing with 15.
*Saturday, November 24, 2007 at 11:30am by Michael*

**math word problems**

Isn't this an application of the Pythagorean theorem? (ladder)^2=(height^2 + (base)^2 but ladder=height+2 and base=ladder-9 or base=height+7 (h+2)^2=(h^2)+(h+7)^2 solve for h.
*Saturday, August 1, 2009 at 12:40am by bobpursley*

**calculus**

A swimming pool is a rectangular solid 15 ft wide, 40 ft long, and at most 4 ft deep. Water is being added to the pool at the rate of 25 cubic ft per minute. How fast is the water rising when there is 1800 cubic ft of water in the pool?
*Thursday, April 19, 2012 at 12:00am by Jasmine*

**geometry **

tylers 14 foot ladder makes a 62 degree angle with the ground.To the nearest foot, how far up the house does tylers ladder reach, and how far away from the house is the base of the ladder
*Wednesday, February 20, 2013 at 9:59pm by victoria *

**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 *

**math**

tilissa was on the middle rung of a ladder.she went up 3 rungs,thendown 5 rungs and then up 7 rungs where she rested.later she climbed up the remaining 7 rungs on the ladder.how many rungs did the ladder have?
*Sunday, January 27, 2013 at 10:18pm by francis*

**Math**

Is the base of the ladder 6 feet from the building? How tall is the ladder?
*Monday, April 16, 2012 at 1:35pm by Ms. Sue*

**TRIG**

5. A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one revolution? A. 4.07 ft B. 13.1 ft C. 8.13 ft D. 9.07 ft
*Saturday, April 28, 2012 at 9:05pm by PAM*

**phsyical science**

compare an atoms structure to a ladder. what parts of the ladder correspond to the energy levels of the atom/ - the rungs identify one way a real ladder is not a good model for an atom - rungs are equally spaced, energy levels are not.
*Wednesday, October 15, 2008 at 10:21pm by Dr Russ*

**math (Ms.Sue)**

your room has 2 windows.Each window occupies 11.76 square ft of wall space.if the windows are each 2.8 ft wide,how tall is each window? my answer is 4.2 ft,am i right? if not tell why.
*Monday, March 5, 2012 at 6:59pm by miki*

**Algebra 1**

your answer is right, but your units are not The volume is 2500 ft^2 * 10 ft = 25000 ft^3 25000 ft^3 * 1gal/(0.134 ft^3) = 186567 gal
*Saturday, February 22, 2014 at 10:22am by Steve*

**math**

foot of ladder from wall --- x top of ladder up the wall --- y x^2 + y^2 = 400 2x dx/dt + 2y dy/dt = 0 when x=16 16^2 + y^2 = 400 y = 12 and we are given dy/dt = -.4 so ..... 2(16)dx/dt + 2(12)(-.4) = 0 dx/dt = 60/32 = 1.875 m/s
*Friday, July 22, 2011 at 8:33pm by Reiny*

**physics**

a person is sled-riding down a hill that is 15.0 ft high. starting at the top with a speed of 10.0 ft/s, the sled reaches the bottom with a speed of 25.0 ft/s. (A) determine whether mechanical energy has been conserved. (B) why might mechanical energy not be conserved?
*Tuesday, February 28, 2012 at 3:34pm by taylor*

**algebra**

Let c = the length of the ladder. b = the distance from the wall. Use the Pythagorean theorem. a^2 + b^2 = c^2 a^2 + 8^2 = 17^2 a^2 + 64 = 289 a^2 = 225 a = 15
*Monday, October 4, 2010 at 9:45pm by Ms. Sue*

**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**

The 8-ft wall shown here stands 27 ft from the building. Find the lenght of the shortest straight beam that will reach to tthe side of the building from the ground outside the wall. ANSWER 46.87ft How do i solve???
*Wednesday, November 28, 2007 at 3:19pm by Anonymous*

**geometry**

the base of a 34ft ladder is placed 12ft from a building. how high above the ground is the top of the ladder
*Monday, March 19, 2012 at 8:50pm by annonimus*

**physics**

A cannon on a level plain is aimed 50 degrees above th e horizontal and a shell is fired with a muzzle velocity of 1200 ft/s toward a vertical cliff 3200 ft away. How far above the bottom does the shell strike the side wall of the cliff?
*Tuesday, September 4, 2012 at 1:48am by valerie*

**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*

**Trigonometry**

Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one...
*Wednesday, July 18, 2012 at 3:29pm by Anonymous*

**Trigonometry - LONESTAR**

The figure below is a model of a Ferris wheel. The diameter of the wheel is 191 feet, and one complete revolution takes 15 minutes. The bottom of the wheel is 11 feet above the ground. Complete the table below. (Round your answers to two decimal places.) t H 0 min 11 ft 1.875 ...
*Monday, March 3, 2014 at 2:11am by Angels*

**math**

Just multiply or divide both sides of the equation to get the scaled value you want: #1 2 in = 20 ft 1 in = 10 ft #2 4 in = 6 ft 1 in = 1.5 ft #3 5 ft = 1 in 25 ft = 5 in #4 1 cm = 40 mi 21 cm = 840 mi #5 6 in = 1 cm 24 in = 4 cm
*Sunday, January 26, 2014 at 5:29pm by Steve*

**Please Help!! Math**

Depth = X Ft. Width = 2X Ft. Length = 4X Ft. Vol. = 4x*2x*x = 1728 Ft^3 8x^3 = 1728 x^3 = 216 X = 6 Ft. 2X = 12 Ft. 4X = 24 Ft.
*Wednesday, June 5, 2013 at 6:13pm by Henry *

**Math**

A street light is mounted at the top of a 15-ft-tall pole. A man 6 ft tall walks away from the pole with a speed of 7 ft/s along a straight path. How fast is the tip of his shadow moving when he is 45 ft from the pole?
*Friday, November 2, 2012 at 1:06pm by AH*

**Math - Trigonometry**

Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one...
*Tuesday, July 17, 2012 at 6:56pm by Anonymous*

**Math - Trigonometry**

Find the value of x on this right triangle when a=20 b=5x-10 and c=2x(Square root of 5) A. x = 15 B. x = 10 C. x = 12 D. x = 16 A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the incline is the top of the wheel after the wheel has completed one...
*Tuesday, July 17, 2012 at 11:10pm by Anonymous*

**algebra**

A man tosses a penny up into the air above a 100 ft well with a velocity of 5 ft/sec. The penny leaves his hand at a height of 4 ft. How long will it take for the penny to reach the bottom of the well?
*Monday, November 25, 2013 at 6:37pm by cole*

**Math**

a building is 3ft. from a 8ft. fence that surround propert a worker wants to wash a window in the building 13ft. from the ground. he will need what size ft. ladder
*Sunday, October 14, 2007 at 1:37am by Anonymous*

**math**

illuminated by the rays of the setting Sun, Kelly rides along on a merry-go-round casting a shadow on a wall. The merry-go-round is turning 36 deg per sec. Kelly is 25 ft from its center, and the Sun's rays are perpendicular to the wall. At what rate is the shadow moving when ...
*Sunday, May 22, 2011 at 12:16am by sophie*

**calculus**

A street light is at the top of a 15 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole
*Friday, November 5, 2010 at 5:51pm by Nikki*

**geometry**

Click the correct answer. Listen 3. Which is greater, the circumference of a circle with radius 3 ft, or the distance around a semicircle with diameter 16 ft? By how much? A. circle, by 4 ft B. circle, by 2 ft C. semicircle, by 4 ft D. semicircle, by 2 ft
*Sunday, April 25, 2010 at 10:34pm by Anonymous*

**calculus**

A trough is 15 ft long and its ends have the shape of isosceles triangles that are 4 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 14 ft^3/min, how fast is the water level rising when the water is 8 inches deep? Does 1.4 ...
*Saturday, February 13, 2010 at 1:18am by Gabe*

**Geometry**

a cat is stuck 15 feet up in a tree.to get it down,you will place a ladder 5 feet from the base of the tree.how tall must your ladder be in order to reach the cat? Round to the nearest foot
*Wednesday, January 16, 2013 at 8:39pm by Lessley*

**math**

A recreation room has the following dimensions. Carpeting will cost $1.50 per square foot. How many square feet of carpet will be needed and how much will it cost?15 ft, 33 ft, 12 ft, 12 ft.
*Tuesday, June 26, 2012 at 11:47am by mary*

**math 4 grade**

A firefighter stood on the middle rungs of a ladder ,spraying water on a burning house. He then climbed up 6 rungs before the heat of the flames caused him to come down 10 rungs.After some minutes he was able to climb 18 rungs to the very top of ladder .How many rungs did the...
*Thursday, October 7, 2010 at 6:30pm by Thanh*

**Calculus**

This is the classic question used by most textbooks to introduce rate of change. using your definitions x^2 + y^2 = 15^2 2x dx/dt = 2y dy/dt = 0 x dx/dt + y dy/dt = 0 a) when x = 9 81+y^2 = 225 y =√144 = 12 also given: dx/dt = 1/2 a) 9(1/2) + 12dy/dt = 0 dy/dt = -4.5/12...
*Sunday, February 5, 2012 at 4:20pm by Reiny*

**physics**

Romeo is trying to climb a ladder placed 3 meters away from a 4 meter high tower where Juliet is stuck. He weighs 110 kg, the ladder weighs 25 kg. Can Romeo climb to the top of the ladder? If so, can he bring Juliet back down with him?
*Wednesday, April 3, 2013 at 6:26pm by Suzie*

**Physics**

This question has been answered by Damon http://www.jiskha.com/display.cgi?id=1303587287 The moment of the ladder about the floor support point is zero. The 98 N ladder weight acts downward 0.4 m from the wall. The wall contact point is sqrt[2.5^2-0.8^2] = 2.37 m above the ...
*Saturday, April 23, 2011 at 11:12pm by drwls*

**AP Physics**

I am a Hong Kong student. But i think i may help you. The only force on the ladder from the wall is the horizontal force.The system here is in static equilibrium. Net torque is zero.Let the total length of the ladder be 1m. then, (1)[(29+9.9+7.1)(g)(0.68)]sinâŠ™ -(0.96)[(7.1)g...
*Saturday, December 4, 2010 at 9:30pm by Marco*

**physics**

write the following equations. sum of vertical forces=0 sum of horizontal forces=0 sum of moments about any point =0 I recommend using the base of the ladder as the moment sum point. Those three equations will do it. Dont forget the weight of the ladder at the MIDDLE of the ...
*Monday, November 9, 2009 at 4:02pm by bobpursley*

**math**

7 yds = 21 ft = 20 ft 12 in. subtract 19 ft 3 1/8 in leaves 1 ft 8 5/8 in
*Monday, June 18, 2012 at 10:28pm by Steve*

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