Wednesday

April 1, 2015

April 1, 2015

Number of results: 102,642

**Acid and Base Equilibrium**

What would happen to a weak base dissociation equilibrium if more products were added?
*March 8, 2012 by princess*

**Chemistry**

A 30.0-ml sample of 0.165 M propanoic acid is titrated with 0.300 M KOH. What is the pH at 5 ml of added base, at 10 ml of added base?
*March 19, 2013 by Annie*

**Precalc**

solve the equation: log base 10 of x - log base 10 of (7-4x)=2 Please help i have been stuck on this for awhile!
*November 26, 2013 by Alison*

**Calculus**

A Baseball Diamond has the shape of a square with sides 90 feet long. a player is running from 1st to 2nd base at a speed of 25 feet per second. find the rate at which his distance s is from home plate is changing when the player is 20 feet from 2nd base.
*May 20, 2012 by John*

**Geometry**

Hi, I don't have much time to turn this in. I think I got all the questions right, but I just want to be sure. I would appreciate some feedback! Thank you! 1. What is the formula for calculating the length of the diagonal of a right rectangular prism on the basis of the prism...
*February 25, 2010 by Emma*

**math**

Two corresponding sides of similar polygons are in the ratio of 8:7. If the area of the smaller figure is 512 square meters, what is the area of the larger figure? A) 3584 m B) 134,217,728 m C) 392 m D) Not enough information given
*October 29, 2009 by jeng*

**Geography**

What is the name given to the vast rural area in the center of the Australian continent? What natural features explain the very sparse population of this area? Please help i'm very confused and all the websites have different info.
*September 24, 2013 by Saru*

**Geometry**

Indirect Proofs Prove a triangle cannot have 2 right angles. 1) Given triangle ABC. 2) Assume angle A and angle B are both right angles is true by one of two possibilities (it is either true or false, so we assume it is true) This is my first time to do indirect proofs, so if ...
*November 18, 2010 by chica*

**Math URGENT!!**

A rectangular garden has an area if 12a^2-5a-2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the path is concrete, ...
*September 28, 2014 by Maya*

**Math**

A hemisphere of radius 7 sits on a horizontal plane. A cylinder stands with its axis vertical, the center of its base at the center of the sphere, and its top circular rim touching the hemisphere. Find the radius and height of the cylinder of maximum volume. radius: height:
*March 22, 2012 by John*

**math**

make triangles and find the area of those triangles and then add em together. I need to find the area of a polygon,breaking into simpler parts. how do you do it?
*April 18, 2007 by jamay*

**math**

how do we find the surface area? top: bottom: right: left: front: back: its still hard when we i find the surface area of a rectanguar prism.
*April 20, 2012 by Celest*

**Math**

"Find the area of a rhombus with sides of length 10 in. and longer diagonal of length 16 in." and Also, how do you solve the problem "Find the area of a regular decagon with radius 4 cm."
*June 9, 2013 by Celina*

**STASTICS**

If the median home price in your area has decreased in your area in the last 2 years, how does this differ from the mean price in your area? Please explain why and include examples.
*August 24, 2010 by sue*

**Re: Physics/Math**

Calculate the ratio of the drag force on a passenger jet flying with a speed of 750 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at one-fifth the speed and half the altitude of the jet. At 10 km the density of air is 0.38 kg/m3 and at 5.0 km...
*February 10, 2007 by COFFEE*

**math**

A cyclist leaves his training base for a morning workout, riding at the rate of 18 mph. One hour later, his support staff leaves the base in a car going 52 mph in the same direction. How long will it take the support staff to catch up with the cyclist once the car leaves the ...
*September 21, 2010 by aaron kennedy*

**math**

Adam has built a garden shed in the shape described. a square based pyramid with the height of 3.5m on top of a cube with base 4m by 4m and height 2m. calculate the volume of the shed, to the nearest cubic metre. thanks.
*May 16, 2010 by Ted*

**Calculus**

A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the least amount of ...
*August 9, 2011 by Joey*

**geometry**

I have a question: My textbook says "The surface of a right prism is 224 sq. feet, and the length of a side of the square base is one-third the height. What are the dimensions of the prism?" How do I find out the dimensions when I don't know the height or the length of the ...
*February 26, 2008 by Meredith*

**MATH**

1. Let triangle ABC be a triangle such that angle ACB is 135 degrees. Prove that AB^2 = AC^2 + BC^2 - (Root 2) x AC x BC 2. Simplify: 2/1! - 3/2! + 4/3! - 5/4! + ..... + 2010/2009! - 2011/2010! Where k! is the multiplication of all numbers up to k (e.g. 5! = 5x4x3x2x1=120) 3. ...
*August 21, 2010 by Gerald*

**math**

Empirical data suggest thatthe surface area of a 180-cm-tall human body changes at the rate ofsquare meters/kilogram, where W is the weight of the body inkilograms. If the surface area of a 180-cm-tall human body weighing 70 kg is 1.886277 m ,what is the surface area of a ...
*May 21, 2012 by siti*

**Calculus **

The region R is bounded by the x-axis, x = 1, x = 3, and y = 1/x^3 A) Find the area of R B) B. Find the value of h, such that the vertical line x = h divides the region R into two Regions of equal area.
*May 6, 2014 by Samantha*

**algebra-Plz help**

Posted by bailey on Monday, January 8, 2007 at 8:32pm. Posted by bailey on Monday, January 8, 2007 at 2:12pm. The area of a rectangular blanket in square centimetersis 40x^2+2x-65. The width is 4x-5cm^2. Find the dimensions of the blanket in terms of x. Can someone plz help ...
*January 9, 2007 by bailey*

**math**

describe the largest pen area possible using the same amount of fencing in 6'X14' area. How do the perimeter and area compare to the pen above?
*September 25, 2012 by niemann*

**Algebra**

I have 104 feet to build a dog pen in a rectangle shape. Area=52x-x2 x= width What is the largest width to maximize the area? What is the area?
*April 16, 2013 by Amy*

**Math**

Is anyone familiar with base ten? I need to show my work on how I recieved my answer. Write the numeral in base ten. 200six =532
*March 21, 2010 by kevin*

**Geometry**

Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.
*December 3, 2012 by Delia*

**Chemistry**

An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base?
*March 8, 2013 by Matthew*

**Math probability question**

a spinner is divided into three areas x,y,z. the measure of angle a is 90 degrees, angle b is 120 degrees and angle c is 150 degrees. If the spinner is spun once, find the probabliity that it will land in 1) area X 2) area y 3) area z
*October 8, 2008 by Bob*

**physics**

You are investing an accident in which a vehicle traveling with a horizontal velocity Vo leaves the top of a cliff of height h, and lands a horizontal distance (x) from the base of the cliff. Prove that the relationship between vo and the other variables is given by the ...
*March 22, 2012 by Adam*

**math check please**

1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple of 3, 6, 9 answer 18...
*February 8, 2007 by larry*

**geometry**

volume of a rectangular pyramid if the height is 13 and the base sides are 12 and 15
*January 24, 2011 by lucila*

**math am i right**

So do you mean that I should multiply the base (7) by the height (18)?
*October 2, 2012 by Yog*

**math **

1) on a map of scale 1cm to 250m the area of car park is 3cm^2.what is the actual area of the car park in hecares(1 hectare= 10,000m^2) 2)The area of the playing surface at wembly stadium is 3/5 of a hectare . what area willit occupy on a plan drawn to a scale of 1:500?
*May 29, 2011 by Reshma *

**Math (Area)**

I need help on where to begin with this problem. You are installing a new deck around your pool. The pool is rectangular with the dimensions 8m by 4m. The deck will surround the pool and will have a width by 2m. What is the area of the deck? I know that A=LxW and that the Area...
*February 27, 2012 by Ali*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*December 6, 2011 by Cam*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*December 6, 2011 by Cam*

**geometry**

Two forces are pushing on an object, one at 12 lbs of Force and one at 5.66 lbs of Force. The angle between them is 35° (each is 72.5 from horizontal, such that the forces make a v with the object in the center). 17. What is the total Force on the object? 18. What is the ...
*December 16, 2011 by Cameron*

**physics**

An arrow is shot from the top of a building (height of 30 meters). The arrow travels 100 meters in the horizontal direction from the base of the building to the point where it hits the ground in 4 seconds. Find the angle of release, actual velocity at release, and maximum ...
*February 22, 2010 by Brad*

**trig-math**

4. 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 5. A wheel 5.00 ft in diameter rolls up a 15.0° incline. How far above the base of the ...
*April 28, 2012 by LOVE*

**precalculus half angle question stumped**

Given tanu= -1/3 and sinu <0, find sin(u/2) if 0 is less than or equal to u < 2 pie I think its a right triangle in fourth quadrant with the point (3,-1) (hypotenuse equals square root of ten) but I'm brain dead and can't find u or any solutions.
*January 11, 2010 by george *

**geometry**

The hypotenuse of a right triangle is 25 cm long. One leg of the same triangle is 7 cm long. What is the length of the other leg? Explain how you found your answer.
*June 30, 2011 by Zoey*

**geometry**

The measure of an exterior angle of an isosceles triangle is x degrees. What are the possible angle measures of the triangle in terms of x? Describe all the possible values of x.
*November 6, 2011 by Anonymous*

**geometry**

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?
*May 8, 2012 by Piggy*

**math**

Two similar figures have sides in the ratio of 2:3. If a side of the smaller triangle has a length of 7, what is the length of the corresponding side of the other triangle?
*May 9, 2012 by heather*

**geometry**

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?
*May 10, 2012 by Piggy*

**Government senior college ikoyi**

An equilateral triangle of side 20cm is inscribed in a circle.calculate the distances of a side of the triangle from the centre of the circle.
*April 5, 2013 by Monday Godwin*

**Geometry**

I need to bisect two angles of a triangle, measure the triangle I didn't bisect, and then construct a point of intersection of the two angle bisectors. No idea what any of that means. thanks
*August 25, 2010 by Lorenzo*

**math**

the short side of an isosceles triangle is 16cm long. by increasing each side length by 24 cm doubles the perimeter.how long are the other sides of the original triangle? ..
*December 2, 2010 by Anonymous*

**algebra**

A set of 2 similar triangles was drawn in a design. One of the triangles was ½ of the other. If the measures of the smaller triangle were 5, 7, and 12 cm, the measures of the larger triangle = 10,14 and 20 cm. true or false
*March 24, 2011 by katie*

**Please help in triangle**

ABC is an isosceles triangle with AB=BC and ∠ABC=123∘. D is the midpoint of AC, E is the foot of the perpendicular from D to BC and F is the midpoint of DE. The intersection of AE and BF is G. What is the measure (in degrees) of BGA?
*June 19, 2013 by Mathslover*

**Algebra**

How would I complete this problem? Geometry. The area of a rectangle of length x is given by 3x^2 + 5x. Find the width of the rectangle. I think the width is 3x+5 but not sure. Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music ...
*June 5, 2007 by Loreal*

**Calculus **

You are given a piece of sheet metal that is twice as long as it is wide an has an area of 800m^2. Find the dimensions of the rectangular box that would contain a max volume if it were constructed from this piece of metal by cutting out squares of equal area at all four ...
*March 26, 2014 by Marie*

**physics**

If a 0.18 kg baseball has a momentum of p = 9.4 kg·m/s as it is thrown from home to second base, what is its velocity? m/s toward second base
*January 20, 2011 by Anonymous*

**Reading**

what is base word for calling, called, calls. what is the base word for burning, burned, burns
*October 10, 2011 by ashley*

**Algebra 2 **

Use the laws of logarithms to condense the following expressions. log base 5 of 6 - log base 5 of x
*April 11, 2013 by Anonymous*

**Algebra 2 **

Use the laws of logarithms to condense the following expressions. log base 3 of 2 + 2 log base 3 of x
*April 11, 2013 by Anonymous*

**Computer Math**

Can anyone help me? Here's what I'm looking for: Col. A = Base period number Col. B = Given number this current period. NEEDED: Spreadsheet formula for: If B >= A, what is %? (Example: A=20, B=30, the # I want should read 50.0, not 1.5) Further, If B < A, what is the ...
*July 21, 2006 by Al*

**life science**

Hi I am doing a report on manas natianal park. and how it got on the world heritage site. but i cant find anything on iti have to answer these question Describe the diversity of life forms found in the area. Describe the biological interrelationships among the life forms in ...
*October 8, 2008 by amy*

**chemistry**

when pressure decreases what happens with the boiling point, it decreases, increases or stays the same? I read the book (the example used is water) were it says that if vapor pressure is less than the pressure pushing down on the surface the bubbles formed collapse; but when ...
*May 23, 2007 by Fabiola*

**geometry**

PLEASE HELP WITH A FEW QUESTIONS triangle ABC has side lengths 8, 15, and 17 do the side lengths form a pythagorean triple? the length of the hypotenuse of a 30-60-90 triangle is 7 find perimeter to approach the runway, a pilot of a small plane must begin a 10descent starting ...
*May 23, 2012 by brittany*

**calculus**

Suppose the volume, V , of a spherical tumour with a radius of r = 2 cm uniformly grows at a rate of dV/dt= 0.3 cm^3/day where t is the time in days. At what rate is the surface area of the tumour increasing? The volume of a sphere is given by V =4 3πr^3and the surface ...
*November 1, 2014 by Quratulann*

**AP Physics**

In a period of 2s, 4.8E23 nitrogen molecules strike a wall area of 8.6 cm^2. If the molecules move at 308 m/s and strike the wall head-on in a perfectly elastic collision, find the pressure exerted on the wall. The mass of one N2 molecule is 4.68E-26kg. Answer in terms of kPa...
*November 15, 2009 by JL*

**mathematics**

find the area of the region between the curve y = 3-x^2 and the line y = -1 by integrating with respect to y you first have to solve for x x=(3-y)^(1/2) then area ⌠ (3-y)^(1/2 dy from -1 to 3 ⌡ =-2/3 (3-y)^(3/2 | from -1 to 3 = -2/3(0 - 8) = 16/3 but this is only ...
*April 18, 2007 by denisa*

**Advanced C**

The measure of one of the equal angles in an isosceles triangle is twice the measure of the remaining angle. Determine the exact radian measures of the three angles in the triangle.
*October 26, 2009 by Anonymous*

**geometry**

Which geometric figure could not be drawn using both perpendicular line segements and parallel line segements? A.a pentagon B. a rectangle C. a trapezoid D. a triangle IS the answer(D) a triangle
*February 13, 2010 by Marie*

**Geometry**

A regular hexagon is made from equilateral triangle by cutting along the dotted lines and removing the three smaller triangles. if triangle has a perimeter of 18, what is the perimeter of hexagon?
*June 10, 2010 by DJ*

**physics **

Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?
*May 23, 2011 by ashley --- HELP PLEASEE!!!*

**physics **

Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?
*May 23, 2011 by ashley --- HELP PLEASEE!!!*

**Geometry**

Use any tools to construct each of the following, if possible: a. A right triangle with one acute angle measuring 75° and a leg of 5 cm on a side of the 75° angle b. A triangle with angles measuring 30°, 60°, and 90°
*August 1, 2011 by Adalgisa*

**Math**

the short side of an isosceles triangle is 16cm long increasing each side length by 24cm doubles the perimeter. how long are the other sides of the original triangle?
*January 24, 2012 by Alexa*

**physics**

Three resistors, each of resistance 6 Ω, are connected in such a way that that they form the three sides of a triangle. What is the equivalent resistance between any two vertices of the triangle?
*April 23, 2014 by m*

**Geometry**

In a triangle with integer side lengths, one side is three times as long as a second side, and the length of the third side is 15. What is the greatest possible perimeter of the triangle?
*August 15, 2014 by itrixie*

**Physics**

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.70 m/s at an angle of 23.0° below the horizontal. It strikes the ground 6.00 s later. (Ignore air resistance.) (a) How far horizontally from the base of the building does the ...
*October 13, 2009 by Maria*

**Physics urgent pls!**

A ball is tossed from an upper-storey window of a building.The ball is given an initial velocity of 8 m/s at an angle of 20 degrees below the horizontal.it strikes the ground 3s later .(a) How far horizontally from the base of the building does the ball strike the ground? (b)...
*February 22, 2013 by Sammie*

**Math, Quadratic Functions**

Eighty metres of fencing are available to enclose a rectangular play area. Determine the dimensions that will enclosed the maximum area. What is the maximum area?
*January 16, 2015 by Sharon*

**Math**

The coordinates of the vertices of triangle ABC are A (-5,1), B (-2,3) and C (-4,7). The triangle is reflected over the line x=2. What is the sum of the x-coordinates of points A', B' and C'(the points after the reflection)?
*December 19, 2007 by Sam*

**Geometry**

The hypotenuse of a right triangle is the side opposite the? a. 90 degree angle b. smallest angle of the triangle c. acute angle d. top angle I believe it is a
*October 2, 2008 by Jen*

**math**

A triangle has vertices P(7,7), Q(-3,-5), and R(5,-3). a. calculate the lengths of the midsegmaents b. calculate the lengths of the three side of triangle PQR. c. compare your answers in a. and b. what do you notice?
*October 19, 2010 by Ted*

**math**

A triangle has vertices P(7,7), Q(-3,-5), and R(5,-3). a. calculate the lengths of the midsegmaents b. calculate the lengths of the three side of triangle PQR. c. compare your answers in a. and b. what do you notice
*October 20, 2010 by Ted*

**math**

A triangle has vertices P(7,7), Q(-3,-5), and R(5,-3). a. calculate the lengths of the midsegmaents b. calculate the lengths of the three side of triangle PQR. c. compare your answers in a. and b. what do you notice
*October 20, 2010 by Ted*

**Geometry**

A right triangle has an angle that measures 55 degress. The leg adjacent to this angle has a length of 43 cm. What is the length of the triangle? Round to the nearest tenth
*February 14, 2011 by Marco*

**Geometry Triangle Coordinate Plane Question**

What kind of triangle is made by connecting the points A(0, –6), B(3,–6), and C(3, –2)? equilateral right isosceles right and isosceles Thank You :)
*January 10, 2012 by sLEXANDria*

**math**

A Triangle has sides 4,8,and 11. In a similar triangle the shortest side is 8 and the longest side is x. a) Write a proportion that models the situation. b) Solve the proportion for x.
*March 27, 2013 by Felicia*

**Inverse trigonometric functions**

How to find the value of arctan(2 sin (pi/3)) without using calculator or sketching a triangle. It is like taking u=something and then evaluating. Thanks. the solution relies on the fact that you should know the ratio of sides of the 30,60 90 degree triangle, and knowing that ...
*April 9, 2007 by Jen*

**geometry**

Find the area of the following figure given that AC = 15 in and BC = 12 in.
*February 25, 2011 by Anonymous*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)
*March 30, 2011 by shannon*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)
*March 31, 2011 by shannon*

**Geometry**

Find the area of this quadrilateral with the given vertices: A(-8,6) B(-5,8) C(-2,6) D(-5,0)
*March 31, 2011 by shannon*

**algebra**

Given: Perimeter= 20 in Area= 15 sq. in Find hypotenuse= ?
*November 17, 2014 by ferdinand*

**math**

a rectangle is to be inscribed under the arch of the curve y = 2cosx from x=-pi to x=pi. What is the length of the base of the rectangle with maximum area? can someone help me with this....i have a lot of problems to do just like this but i dont understand them. can someone ...
*December 9, 2009 by kelli*

**Algebra**

The equation r = (sqrt A)/(pi) gives the radius r of circle with area A. What is the radius of a circle with the given area? Write your answer as a simplified radical and as a decimal rounded to the nearest hundredth. a. 50 ft^2
*April 25, 2014 by Anonymous*

**Advanced Math**

log10x + log10(x+1)=1 In other words log base 10 + log base 10(x+1)=1 I need to show it algebraically not using calculator Thanks a lot !
*December 22, 2009 by Chris*

**AP Chemistry**

Write the expression of for the base dissociation constant for hydrazine, N2H4, a weak base. Hydrazine reacts with water to form the N2H5+ ion.
*January 11, 2010 by Angie*

**MAT115**

Identify the base in the following application: The sales tax rate is 8%. If you pay a tax of $2.50 on an item, what is the selling price. I don't know what the base is or how to solve the problem.
*July 22, 2010 by barb*

**chemistry please help me please!!!**

When one student did this experiment, he started with 19.5 mL of 0.118 M monoprotic acid. The endpoint was reached when 17 mL of base was added. What was the concentration of the base?
*July 9, 2012 by Sabrina *

**geomerty HELP PLEASE!**

Using vectors, show that the centroid of a regular pyramid with a rectangular base lies on the altitude to the base and is 4/5 of the altitude's length from the vertex.
*December 4, 2012 by Delia*

**Geometry-8th gr**

Find KN and LM. In triangle LKM, angle L is bisected. Line segment LK is 11, line segment KN is x-4, line segment NM is 5.4, and line segment LM is 2x + 1.3 (there is a drawing of this triangle) Thanks.
*February 1, 2013 by Mona*

**Math**

Find the shaded area in the following figure if the rectangle inscribed in the circle has dimensions 3 ft x 4 ft. I know I find the area of the rectangle A=l*w, but what do I do next?
*December 16, 2009 by Punkie*

**Math**

Employer receive a base pay of $900.00 plus a sales commission of 6% of sale sum of base pay and commission deduction 18% of gross pay gross pay minus deduction My answer : base pay $900.00 + $54.00 = $954.00 -$171.72= net pay $782.28
*September 19, 2012 by Asia*

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