Sunday

April 20, 2014

April 20, 2014

Number of results: 15,286

**physics**

Nate is 165 cm tall, 40 cm wide, and weighs 710 N. He needs to walk ten blocks (1000 m) against a 50 km/h head-wind. Nate pushes on the ground with the minimum force that allows him to move slowly forward at a constant speed, and against the drag from the wind. How much energy...
*Wednesday, January 6, 2010 at 5:54pm by hilary*

**algebra/math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 100 people. a) How many would you expect to be between 158 and 172 cm tall? b) How many would you expect to be taller than 160 cm ...
*Saturday, August 27, 2011 at 6:02am by Andrea*

**math**

To make shelves for a bookcase, Nate needs 7 pieces of lumber, each 45 inches long. Nate has several 10-foot lengths of lumber in the width and thickness he needs. How many of these 10-foot boards will Nate use?
*Sunday, October 28, 2007 at 9:27pm by Mary*

**Physics**

A 6.00 cm tall candle is placed at a distance of 30.0 cm from a double convex lens having a focal length of 15.0 cm. How tall is the image? 1.50 cm 3.00 cm 6.00 cm 9.00 cm I honestly don't even know where to begin with this one, but if I guessed, I would go with 1.50cm
*Friday, October 19, 2012 at 1:09pm by Derp*

**Physics**

A 6.00 cm tall candle is placed at a distance of 30.0 cm from a double convex lens having a focal length of 15.0 cm. How tall is the image?
*Thursday, January 31, 2013 at 5:01pm by Anonymous*

**English**

1. Ted is 2 years older than Bill. 2. Ted is 5 centimeters taller than Bill. 3. Ted is 10 kilograms heavier than Bill. (Are they all grammatical?) 4. Ted is 165 cm tall. (How do we read '165 cm' here? 5. one hundred sixty-five centimeters 6. one sixty-five centimeters 7. one ...
*Tuesday, November 5, 2013 at 7:53am by rfvv*

**statistics**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 159 and 171 cm tall (b) How many would you expect to be taller than 160 cm
*Tuesday, November 29, 2011 at 12:02pm by gertrude*

**statistics**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 159 and 171 cm tall (b) How many would you expect to be taller than 160 cm
*Tuesday, November 29, 2011 at 12:03pm by gertrude*

**statistics**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 100 people. (a) How many would you expect to be between 157 and 173 cm tall? (b) How many would you expect to be taller than 160 cm?
*Sunday, October 2, 2011 at 5:11pm by carlos*

**Statistics**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 100 people. (a) How many would you expect to be between 157 and 173 cm tall? (b) How many would you expect to be taller than 160 cm?
*Wednesday, March 14, 2012 at 12:22am by Erica*

**maths**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 157 and 173 cm tall? (b) How many would you expect to be taller than 160 cm?
*Monday, October 29, 2007 at 4:59pm by Anonymous*

**ALGEBRA**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 159 and 171 cm tall? (b) How many would you expect to be taller than 160 cm?
*Sunday, June 10, 2012 at 2:15am by Mike*

**ALGEBRA**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 159 and 171 cm tall? (b) How many would you expect to be taller than 160 cm?
*Sunday, June 10, 2012 at 9:11pm by Urgen please help*

**math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to be taller than 160 ...
*Tuesday, August 28, 2012 at 12:41pm by Anonymous*

**math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to be taller than 160 cm?
*Wednesday, August 29, 2012 at 5:00pm by Anonymous*

**math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to be taller than 160 ...
*Wednesday, August 29, 2012 at 5:03pm by Anonymous*

**Math**

nate owes michael 5.00 nate expressed how much he owes as an integer Michael expressed how much nate owes him as an integer what do the two integers have in common
*Friday, February 8, 2013 at 10:27am by Josh*

**CALCULUS**

At 3:00 PM a man 144 cm tall casts a shadow 146 cm long. At the same time, a tall building nearby casts a shadow 171 m long. How tall is the building? Give your answer in meters. (You may need the fact that 100 cm = 1 m.)
*Wednesday, September 19, 2007 at 11:39pm by Stumped Student*

**physics**

A 7·cm tall candle is placed 125·cm from a lens with a focal length of +25·cm. Note: enter the absolute value of your answers for all distances and heights ... use the signs to determine the type and orientation of the images. a) How far from the lens will the image be? b) How...
*Monday, March 18, 2013 at 4:15pm by wally*

**Math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 158 and 172 cm tall
*Wednesday, August 24, 2011 at 7:34pm by Ann*

**statistics**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 158 and 172 cm tall?
*Thursday, March 15, 2012 at 9:19pm by Shelly*

**algebra/math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 40 people. (a) How many would you expect to be between 158 and 172 cm tall?
*Saturday, August 27, 2011 at 6:02am by Anonymous*

**Physics**

(1) A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length? (2) If a 1.75 m tall man is looking at a plane mirror from an eye which is 15 ...
*Wednesday, February 18, 2009 at 10:41pm by Fred*

**Physics**

(1) A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length? (2) If a 1.75 m tall man is looking at a plane mirror from an eye which is 15 ...
*Thursday, February 19, 2009 at 12:42am by Al*

**people**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. (a) How many would you expect to be between 159 and 171 cm tall?
*Sunday, December 11, 2011 at 11:33pm by Anonymous*

**Physics**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? -21.4 cm 21.4 cm 65 cm 35 cm
*Wednesday, October 31, 2012 at 3:09pm by Blegh*

**Physics**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? -21.4 cm 21.4 cm 65 cm 35 cm
*Thursday, November 1, 2012 at 11:16am by Blegh*

**algebra**

Lunc Capacity: The polynomial 0.041h-0.018A-2.69 can be used to estimate the lung capacity, in liters of a female find the lung capacity of a 40-year old woman who is 165 cm tall.
*Tuesday, July 24, 2012 at 2:39pm by Anna*

**Brock**

An object creates an inverted, virtual image, 3 cm tall, 10 cm from a converging mirror with a focal length of 15 cm. Where is the object located? How tall is it? I didn't think mirrors created inverted virtual images...
*Tuesday, February 24, 2009 at 10:04pm by Physics*

**English**

Find two people or two things which are equal in some way, and talk about them with your partner using the expression as as. Tom, are you tall? Yes, I am. How tall are you? I am 160 cm tall. (Looking at his partner, Bill) How about you? How tall are you? I am 160 cm tall. How ...
*Thursday, March 12, 2009 at 3:24pm by John*

**physics **

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? Choose one answer. a. -21.4 cm b. 21.4 cm c. 65 cm d. 35 cm
*Saturday, April 30, 2011 at 7:28pm by ashley --- HELP PLEASEE!!!*

**physics**

A 4.5 cm tall object is placed 20 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.5 cm tall. (a) What type of mirror should be used? concave mirror convex mirror (b) Where is the image located? (Your answer should be positive ...
*Sunday, March 25, 2012 at 6:39pm by Tom*

**physics **

What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? Choose one answer. a. -13.3 cm b. 13.3 cm c. -40.0 cm d. 40.0 cm
*Saturday, April 30, 2011 at 6:22pm by ashley --*

**physics ---- really dnt get this at all**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the image distance? Choose one answer. a. -21.4 cm b. 21.4 cm c. 65 cm d. 35 cm
*Saturday, April 30, 2011 at 6:24pm by ashley --*

**Physics**

What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? -13.3 cm 13.3 cm -40.0 cm 40.0 cm
*Thursday, October 25, 2012 at 3:30pm by Huh?*

**physics**

Sam is 180cm tall. He stands 60 cm in front of a tall plane mirror.How tall is Sam's image
*Tuesday, April 17, 2012 at 12:06pm by Anonymous*

**physics**

Sam is 180cm tall. He stands 60 cm in front of a tall plane mirror.How tall is Sam's image
*Tuesday, April 17, 2012 at 12:06pm by mj*

**physics**

A lamp which is 9.0 cm tall is in front of a concave mirror which has a focal length of 53.0 cm. (a) How tall is the lamp's image if the lamp is a distance of 26.5 cm from the mirror (include sign if negative)? (b) How tall is the lamp's image if the lamp is a distance of 63.6...
*Thursday, January 17, 2013 at 6:37pm by m*

**Maths**

kelly is 140cm tall, that is just 4 cm short of twice as tall as her sister,how tall is her sister?
*Tuesday, October 25, 2011 at 12:48am by Emma*

**Physics**

Two converging lenses with the focal lengths of 40 cm and 20 cm are 10 cm apart. a 2.0-cm-tall object is 15 cm in front of the 40-cm-focal-length lens. Calculate the image position and height.
*Tuesday, April 27, 2010 at 8:02pm by Ashley*

**Geometry**

A young man 150 cm tall cast a shadow that was 200 cm long. His father’s shadow, cast at the same time of day, was 240 cm long. How tall was his father?
*Thursday, April 15, 2010 at 4:39pm by tonya*

**Math**

There are g girls and b boys. 2 g/7 = (3/5)(g-165) (See Damon's derivation) (10/21)g = g - 165 11/21 g = 165 g = 315 b = 315 -165 = 150 Total = b + g = 465
*Wednesday, December 26, 2012 at 4:23pm by drwls*

**English Grammar**

Yes they are all the same and grammatical -- except the last one should be: The boy is 170 cm tall. He is a 170-cm-tall boy.
*Monday, April 14, 2008 at 4:20pm by Ms. Sue*

**Math 11**

In a photograph, a man is 1.3cm tall and a flagpole is 4.8cm tall. If the man is 190 cm in real life, how tall is the flagpole, to the nearest centimetre?
*Thursday, March 29, 2012 at 7:36pm by Raymond*

**math**

Nate's front yard was 50 feet wide. each time he pushed the mower along the length of the yard, he mowed a path 24 inches wide. To mow the entire yard, how many times did nate nedd to push the mower along the lentgh of the yard
*Thursday, February 7, 2013 at 5:02pm by Nakia*

**math**

In a photograph, a man is 1.3cm tall and a flagpole is 4.8cm tall. If the man is 190 cm in real life, how tall is the flagpole, to the nearest centimetre?
*Wednesday, April 2, 2014 at 5:13pm by kagney*

**physics**

a container has a height of 50 cm and a width of 20 cm and a depth of 15 cm. if you stack three on top of each other, how tall will it be?
*Thursday, September 8, 2011 at 3:56pm by bfdbnaf*

**Math**

a young Colorado spruce tree is growing at a rate of 20 cm per year. Currently, it is 244 cm tall. A 300 cm tall white spruce tree is growing at a rate of 12 m per year. In how many years will the two trees be the same height? Solve algebraically
*Sunday, April 29, 2012 at 10:37pm by Hanu*

**Math**

A young Colorado spruce tree is growing at a rate of 20 cm per year. Currently, it is 244 cm tall. A 300 cm tall white spruce tree is growing at a rate of 12 m per year. In how many years will the two trees be the same height? Solve algebraically
*Monday, April 30, 2012 at 10:06am by Hanu*

**geometry**

Katie is 100 cm tall and is standing so that her mother's shado covers her shadow. She is 90 cm from her mother and her mother's shadow is 225cm long. How tall is her mother?
*Thursday, January 14, 2010 at 8:40pm by Libby*

**English**

Today we had a medical/physical checkup at school. A doctor and three nurses came to our school. I was 60 cm tall last year. Now I am 65 cm tall. I grew 5 cm from last year. My hearing was good. However, my teeth and eyes were bad. The doctor said I'm in bad health. I need to ...
*Wednesday, June 16, 2010 at 9:38pm by rfvv*

**Math**

hi,about how long or tall is a recliner? 80ct tall,8ct.tall,80meters tall or 8meters tall?
*Monday, April 13, 2009 at 9:47pm by james*

**math**

A model rocket is built to a scale of 3 cm =5 m if the model is 9.4 cm tall how tall is actual rocket
*Tuesday, January 29, 2013 at 10:12am by makayla*

**University College of Applied Sciences **

A rectangular object is 25 cm tall , 15 cm wide , and 10 cm deep .what is its volume in cubic centimeters , liters , and kiloliters ?
*Sunday, November 13, 2011 at 6:31pm by heba*

**math**

Nathan owes Michael $5.00.Nate expressed how much he owes as an integer.Michael expressed how much Nate owes him as an integer.What do the two integers have in common?
*Wednesday, February 22, 2012 at 6:21pm by bebe*

**science**

A 3.5-cm tall object is placed 10.0 cm in front of a concave mirror having a focal length of 14.5 cm. Find the location position and height by drawing a ray diagram to scale. Verify your answer using the mirror and magnification equations. cm (location) cm (height)
*Wednesday, March 26, 2014 at 10:56pm by Maggie*

**Physics**

A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length?
*Wednesday, February 18, 2009 at 9:29pm by Fred*

**Math**

find factors of 165 165 = 3 x 5 x 11 which would make 15, 33 and 55 factors of 165
*Monday, January 14, 2013 at 1:18am by Reiny*

**Physics**

momentum conserved. assuming this is an impulse.. M=146 m=mass of gas emitted m*30=(165+m).39 m(29.61)=165*.39 m=you do it. percentage=m/(165+m-149)
*Tuesday, November 13, 2012 at 3:52pm by bobpursley*

**physics**

A 8.20 cm tall object is placed 30.0 cm in front of a concave mirror with a focal length of 4.20 cm. What is the magnification?
*Thursday, November 10, 2011 at 4:22pm by TP*

**Physics**

A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?
*Tuesday, February 26, 2013 at 7:54am by Aa*

**3rd math**

Laura and her brother planted bean seeds. When Laura plant was 25 cm tall, her brother plant was 32 cm tall. How much taller was her brother plant?
*Tuesday, January 22, 2008 at 9:53pm by LaNoria*

**Physics**

A convex mirror with a radius of curvature of 39.0 cm forms a 0.95 cm tall image of a pencil at a distance of 12.1 cm behind the mirror. What is the magnification?
*Tuesday, February 18, 2014 at 10:58pm by Anonymous*

**physics**

A convex mirror with a radius of curvature of 39.0 cm forms a 0.95 cm tall image of a pencil at a distance of 12.1 cm behind the mirror. What is the magnification?
*Tuesday, February 18, 2014 at 11:21pm by Anonymous*

**math**

Each piece of 10-foot-long lumber has 120 inches (12*10). You need to figure how many times 45 goes into 120 to find the number of shelves Nate can get from each 10-foot long piece. If you post your answer and the number of 10-foot boards Nate will use, we'll be glad to check ...
*Sunday, October 28, 2007 at 9:27pm by Ms. Sue*

**math**

Jay is 150 cm tall. He can reach 55 cm above his head. A ball is thrown 268 cm in the air. How many centimeters must Jay jump to cathch it?
*Sunday, February 13, 2011 at 11:13am by joe*

**Physics**

An object 3.35 cm tall is placed 10.8 cm in front of a mirror, which creates an upright image that is 5.61 cm in height. a) What is the magniﬁcation of the image?
*Sunday, April 1, 2012 at 10:06pm by angel*

**5th grade**

Subtract 25 from 355. You get 330. Now divide that in 2 = 165. That means 165 boys, now add 25 to 165 = 190 girls. To check your answer add 190 + 165 and you get 355. Sra
*Tuesday, May 26, 2009 at 6:08pm by SraJMcGin*

**physics**

Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.
*Thursday, March 22, 2012 at 7:06pm by jim*

**physics**

Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.
*Saturday, March 24, 2012 at 3:30pm by jim*

**physics**

where would the image of a 4.0 cm tall object that is 12 cm in front of a flat mirror be located?
*Monday, May 16, 2011 at 1:16pm by David*

**principles of physics**

Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.
*Wednesday, March 21, 2012 at 7:35pm by Christie*

**Calculus**

A lemon tree nursery usually sells a certain breed after 4 years of growth and shaping.the growth rate is approximated by: dh/dt =2.4t+3 where t is time in years and h is the height in cm. suppose that seedlings are 10 cm tall when planted (at t=0) a) find the height after t ...
*Sunday, April 1, 2012 at 11:52pm by Anonymous*

**Calculus**

A lemon tree nursery usually sells a certain breed after 4 years of growth and shaping.the growth rate is approximated by: dh/dt =2.4t+3 where t is time in years and h is the height in cm. suppose that seedlings are 10 cm tall when planted (at t=0) a) find the height after t ...
*Sunday, April 1, 2012 at 11:52pm by Anonymous*

**Physics**

What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 0.33 -0.33 1.33 -1.33 I'm thinking B.
*Thursday, October 25, 2012 at 3:30pm by Fleur*

**physics **

What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? Choose one answer. a. 0.33 b. -0.33 c. 1.33 d. -1.33
*Saturday, April 30, 2011 at 6:22pm by ashley --*

**Maths**

think about it. each second, a 30cm tall cylinder of water passes through the pipe v = base * height 15cm^2 * 30 cm/s = 450 cm^3/s * 60s/min = 27000 cm^3/min = 27L/min
*Wednesday, January 11, 2012 at 11:25pm by Steve*

**physics**

An object 3.28 cm tall is placed 10.5 cm in front of a mirror, which creates an upright image rant is 6.43 cm in height. A. What is the magnification of the image? B. What is the radius of the curvature of the mirror?
*Wednesday, March 28, 2012 at 9:25pm by imel*

**Physics**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image? -0.429 -2.33 0.429 2.33
*Wednesday, October 31, 2012 at 3:42pm by Blegh*

**Physics**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image? -0.429 -2.33 0.429 2.33
*Thursday, November 1, 2012 at 11:16am by Blegh*

**Physics**

A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image? -0.429 -2.33 0.429 2.33
*Thursday, November 1, 2012 at 2:07pm by Blegh*

**Physics**

The image of a crayon appears to be 20.6 cm behind the surface of a convex mirror and is 1.64 cm tall. The mirror’s focal length is 54.3 cm. a) How far in front of the mirror is the crayon positioned? Answer in units of cm I keep on getting it wrong so the answer & explanation...
*Sunday, April 1, 2012 at 9:26pm by angel*

**Chemistry**

This is meant to be simple, but for some reason I'm not getting the right answer. Question is: Perhaps the most famous horse race ever in the United States was the 1938 race between two thoroughbreds, War Admiral and Seabiscuit, both of whom stood about 15 hands high. ...
*Thursday, September 20, 2012 at 8:49pm by Emily*

**Math**

On his 13th birthday he was 112 cm tall and on his 14th birthday he was 121cm tall. Assume a geometric monthly growth rate. What is this rate? (%)
*Saturday, October 13, 2012 at 9:56pm by Megan*

**physics**

D=m/V=m/ð•R^2•h Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm. I am lost on the numbers to plug into this one please help
*Saturday, March 24, 2012 at 7:26pm by jim*

**Physics**

A small statue has a height of 3.8 cm and is placed in front of a concave mirror. The image of the statue is inverted, 1.9 cm tall, and located 14 cm away from the mirror. Find the focal length of the mirror.
*Wednesday, April 10, 2013 at 4:11pm by Jim Bob*

**Physics**

A small statue has a height of 3.8 cm and is placed in front of a concave mirror. The image of the statue is inverted, 1.9 cm tall, and located 14 cm away from the mirror. Find the focal length of the mirror.
*Thursday, April 11, 2013 at 8:13am by Bob*

**Physics**

at what distance would a convex magnifing lens that has a focal length of 10 cm have to be held for an image to appear upright and 3 cm tall? [6.67cm]
*Tuesday, June 26, 2012 at 2:16pm by Anonymous*

**Physics**

at what distance would a convex magnifing lens that has a focal length of 10 cm have to be held for an image to appear upright and 3 cm tall? [6.67cm]
*Tuesday, June 26, 2012 at 2:16pm by Anonymous*

**geometry**

A girl wants to calculate the height of her family's teepe. She iss 112 cm tall and she finds that when she is inside and stands so that hher head touches the side, her feet are 64 cm from the edge. If the teepe is a right circular cone with a diamter of 352 cm, what is its ...
*Thursday, January 13, 2011 at 10:54pm by crystal*

**math**

One inche I squally 2.5 cm 165/2.5 = 66 inches
*Thursday, February 13, 2014 at 5:43pm by Kuai*

**physics**

An object is 38.0 cm from a concave mirror of 12 cm focal length. The object is 1.8 cm tall. Use the mirror equation to find the image position. How high is the image?
*Thursday, May 2, 2013 at 12:28pm by Anonymous*

**math**

Burj Khalifa is the world tallest building in Dubai at 828 m tall. The CN Tower in Toronto is 553 m tall. Sam wants to compare the Burj Khalifa and the CN Tower by creating rectangular prism models on a 10 cm by 10 cm square base. She has decided to represent the Burj Khalifa ...
*Tuesday, January 15, 2013 at 12:37am by matthew*

**math**

The world's tallest building is the Burj Khalifa in Dubai at 828 m tall. The CN Tower in Toronto is 553 m tall. Ryan wants to compare the Burj Khalifa and the CN Tower by creating rectangular prism models on a 10 cm by 10 cm square base. He has decided to represent the Burj ...
*Tuesday, January 15, 2013 at 3:20pm by jenny*

**Physics**

An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principle-ray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or inverted), and nature (...
*Wednesday, July 27, 2011 at 10:17pm by Chloe*

**Geometry**

The first one will have travelled 220 nautical miles, the second one 165 n miles. the angle between their paths is 130º so dist^2 = 220^2 + 165^2 - 2(220)(165)cos130 = .. = .. I am sure you can do the arithmetic.
*Monday, March 3, 2008 at 9:03pm by Reiny*

**Math**

The printer in Nate and Beth's office was out of paper. So, they put a ream of paper in the printer, 500 sheets. Nate then printed 72 sheets. Beth then added 30 sheets of paper to the printer. What was the net change in the number of pieces of paper in the printer from after ...
*Monday, January 7, 2013 at 8:43am by Sumare*

**Math**

The container is 10 cm tall and holds exactly 60 cubes.The length of the cube is 2 cm.What is the volume of the container?
*Monday, December 17, 2012 at 7:08pm by Jhazzelle*

**physics**

a kids marble rolls of a 63 cm tall table a a speed of 30 cm/s. How far from the based of the table will the ball land?
*Tuesday, March 12, 2013 at 11:46am by lisa*

**Trigonometry**

cos 2A = 2cos^2 A - 1 let A = 165, then 2A = 330 so let's find cos 330 cos(330) = cos(360-30) = cos360 cos30 + sin360 sin30 = (1)(√3/2) + (0)(1/2) = √3/2 then √3/2 = 2cos^2 165 - 1 (√3 + 2)/4 = cos^2 165 cos 165 = -√(√3 + 2))/2 (...
*Friday, April 10, 2009 at 3:20pm by Reiny*

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