Saturday

February 6, 2016
Number of results: 111,809

**Math**

A cylindrical tank has a height of 8 feet and a diameter of 2 3/4 feet. Use pi= 3.14 What is the lateral surface area? 69.08 square feet What is the lateral surface area ? 828.96 square inches How do i find: If a quart of paint covers 100 square feet, how many quarts of paint ...
*May 15, 2008 by Mike*

**TRIANGLE SIMILARITIES RATIOS AND PROPORTIONS**

imageshack(.)(us)/photo/my-images/834/j6wv.jpg/ imageshack(.)(us)/photo/my-images/17/6n4x.jpg/ please PLEASE IM BEGGING YOU MY TEACHER WILL BE GIVING ME 79 IF I DIDNT GET THIS .. OR ELSE LOWER THAN THAT. PLEASE TRIANGLE SIMILARITIES RATIOS AND PROPORTIONS - BARBIE LEE, ...
*November 20, 2013 by barbie lee *

**Math**

A rectangular field is to be subdivided in 6 equal fields. There is 1200 feet of fencing available. Find the dimensions of the field that maximizes the total area. (List the longer side first) Width = feet Length = feet What is the maximum area ? Area =
*September 22, 2014 by irina*

**chemistry**

Hi there, ok, my question stated "Use information from acid/base table and the value of Kw t ocalulate the base ionization constant, Kb, of the following bases: a)hypochlorite ion b) nitrite ion c) benzoate ion I looked at my acid/base table but it only gives values for ...
*April 8, 2008 by Jay*

**precal**

From a point B that is 9 meters above level ground , the angle of elevation of the top of a building is 43 degrees and the angle of depression of the base of the building is 7 degrees. What is the height of the building. (tell what formula and why you used it will very much be...
*July 15, 2012 by shep*

**chemistry**

Here are 2 questions I worked out, but need them checked. Also, can't get answer to another question correct unless question 1 is correct. Would you check the first 2 and help me with the third? 1) What is the pH of a 0.05 M solution of TRIS acid (pka = 8.3)? My answer: I used...
*February 2, 2008 by alan*

**math**

simplify each expression by using properties of logarithms or definitions. check your results using the change of base formula a.) log3 27= b.) log5 (1/5)= c.) if f(x)= ln (x), find f(e^x)
*March 3, 2011 by anonymous*

**math**

find the volume of the cup. the diameter of the top is 3inches. the diameter of the base is 2inches. the height is 4inches.
*May 22, 2011 by meeeeee*

**Calculus **

4. Find the volume of a pyramid of height 160 feet that has a square base of side 300 feet
*June 5, 2013 by Maryam*

**Physics**

If you have a hydraulic lift and you know the density of the oil inside, the area of the cylinder and the area of the piston and the force that needs to be applied to lift as certain weight and the weight of that object...how do you find the height that the piston needs to be ...
*December 7, 2009 by Sara*

**Algebra **

Please I need some help for this problem below please show the full solution thanks:Two angles of a triangle have the same measure and the third one is 51 degrees greater than the measure of each of the other two. Find the measure of the LARGEST angle in the triangle.
*January 27, 2016 by Arie*

**geometry**

Triangle ABC is congruent to triangle DEF. If the length of AB is 12 feet and the length of AC is 10 feet. Find the length of DE. can someone please help me on this question please and thank youu :)
*September 3, 2011 by Alexis*

**math (need help badly)**

the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4) Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18) a)How do i detremine the value of k
*May 23, 2008 by rita*

**math**

solve each triangle using either the Law of Sines or the Law of Cosines. If no triangle exists, write no solution. Round your answers to the nearest tenth. A = 23, B = 55, b = 9 A = 18, a = 25, b = 18
*December 9, 2011 by Rick*

**geometry**

Draw an equilateral triangle ABC with side length 4cm to scale and then draw dotted lines to show all axes of symmetry of this triangle
*April 14, 2015 by Nelly*

**geometry**

Corresponding sides of 2 triangles are 6 & 15; if the perimeter of the smaller triangle is 22, what is the perimeter of the larger triangle?
*January 24, 2011 by B.J.*

**math**

The length of the sides of a triangle are 6,14,and 10.If the shortest side of a similar triangle has length,then its perimeter is?
*January 28, 2011 by lindsey*

**math**

an equilateral triangle has an altitude length of 36 feet. determine the length of a side of the triangle
*December 13, 2011 by anonymous*

**maths**

A triangle has side lengths in the ratio 3:4:5. I the perimeter of the triangle is 84 cm, what is the length of the shortest side?
*April 19, 2012 by Kylie*

**Math**

The sides of the triangle at right are formed by the graphs of 3x+ 2y = 1, y = x − 2, and −4x+ 9y = 22. Is the triangle isosceles? How do you know?
*February 12, 2013 by Mark*

**math**

A triangle has angles measuring 35 degrees and 53 degrees.What is the measure of the third angle of the triangle.
*March 20, 2013 by Angel*

**maths**

ABC is a triangle BD & CE are altitudes drawn from the vertex B & C. Prove that ABC is an isoceles triangle
*June 19, 2013 by karan*

** algebra**

Triangle ABC is reflected over the x-axis. Triangle ABC has points A (10, 2), B (9, 5), and C (6, 4). What is the B' coordinate?
*December 1, 2015 by jnjlk*

**Math Prob**

ok for changing the base of a log from 10 to e is there a formula?
*December 11, 2008 by confused*

**8th Grade math - Ms. Sue please**

An archaeologist has set up a dig at a newly discovered site. She and her team start excavating an area that is 36 feet by 24 feet. Because the scientists find many artifacts near the edges of this area, they decide to expand the dig. They add nine feet in all directions to ...
*November 16, 2012 by Chris*

**science**

What makes a base a base, as in acids.
*September 17, 2008 by raymond*

**survey math**

11110 base 2 = (?) base 10
*February 19, 2010 by brad*

**Chemistry**

the pH of a .3 M solution of a weak base is 10.72. what is the Kb of the base?
*February 28, 2011 by Anonymous*

**Chemistry**

If the Kb of a weak base is 2.6 10-6, what is the pH of a 0.24 M solution of this base?
*October 6, 2012 by Alex*

**math**

Change 1010101011 base 2 to base 4
*December 16, 2013 by Lindsay*

**Calculus**

Find the area of the enclosed by the y-axis and the curves y=x^2 and y=(x^2+x+1)*e^(-x). ...I'm supposed to use tabular method to find the area. But I'm not sure where to start with this question. I drew the graph for y=x^2, but that's about it. Help! thanks
*October 30, 2010 by Anonymous*

**physics**

A hiker begins a trip by first walking 25.0 km southeast from her base camp. On the 2nd day, she walks 40.0 km in a direction 600 north of east, at which point she discovers a forest rangers tower. Find the magnitude and direction of displacement from base camp.
*November 6, 2014 by rah*

**Technology**

Please do an e.g for me by Calculate the force required to move a small piston that has an area of 2m,if the force of a large piston is 20N with an area of 4m? Using this formula:force of small piston over area of small piston =force of large piston over area of large piston
*July 24, 2014 by Clendar*

**trig**

Two sides of triangle CDE are 9 and 4, as shown. Write an equation in standard form for the line CD. Leave values as radicals. There is a picture of a triangle that passes through point (4,0) The answer is 65^1/2x + 4y = 4(65^1/2) But, I don't understand how to do this problem.
*January 28, 2010 by Dale*

**math logarithm**

proof: 2/ log a base 9 - 1/ log a base 5 = 3/ log a base 3??
*January 7, 2009 by MAYA*

**math logarithm**

proof: 2/ log a base 9 - 1/ log a base 5 = 3/ log a base 3??
*January 7, 2009 by MAYA*

**math**

A cylinder of radius 14 cm contains water. A metal solid cone of base radius 7 cm and height 18cm is submerged into the water. Find the change in height of the water level in the cylinder
*February 7, 2015 by kudu*

**chemistry lab**

Here are 2 questions I worked out, but need them checked. Also, can't get answer to another question correct unless question 1 is correct. Would you check the first 2 and help me with the third? 1) What is the pH of a 0.05 M solution of TRIS acid (pka = 8.3)? My answer: I used...
*February 2, 2008 by ryan*

**math**

Given: line nm is congruent to qr; angle m and angle r are right angles; line mp is congruent to ro. Prove: triangle nmo is congruent to triangle qrp and angle n is congruent to angle q
*October 27, 2010 by angelica*

**chemistry**

do we have buffering region and ph=pka in any of these conditions: strong base vs strong acid strong base vs weak acid weak base vs strong acid weak base vs weak acid
*May 23, 2010 by eng*

**Math**

The sides of a triangle measure 2, 3 and 4. If the smallest side of a similar triangle measures 8, then the measure of the largest side is? Since eight is four times as large as two, the new triangle largest side will be four times four.
*April 11, 2007 by Pam*

**calculus -- PLEASE HELP!**

1. There is a wall that does not need fencing [at x=0]. The curve that also does not need fencing is y=x^2/9. The fence is four units long and extends from the y axis horizontally some distance and then drops down to the curve. Find the lengths of the horizontal and vertical ...
*February 26, 2008 by anonymous*

**science, chem**

What happens when an alcohol base pen meets another alcohol base? What happens when it meets a water base?
*October 17, 2007 by HELLLLPPPP!*

**MAT115**

Identify the "Base" in the following application: The sales tax rate is 8&. If you pay a tax of $2.50 on a purchased item, What is its selling price? Should this question be changed to a statement to make it easier to identify the base? For example: If I write the statement ...
*July 22, 2010 by barb*

**math**

Arrange the fractions in order from smallest to largest. , , , 5/8,3/4,9/16,7/8 Add. Write the answer in lowest terms. 3 2/7 + 5 3/7 Subtract. Write the answer in lowest terms. 6 4/5 - 2 1/5 Evaluate. Write the answer in lowest terms. 8/15-4/15+1/15 Add. Write the answer in ...
*March 26, 2009 by sw*

**geometry**

In an isosceles triangle, the measure of the vertex angle is 4x. The measure of each base angle is 2x + 10. What is the actual measure of the vertex angle?
*August 8, 2010 by monique*

**Mathematics**

A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?
*March 20, 2011 by Natascha*

**Mathematics**

A landscape architect wants to maximise the area of a herbal garden. The fence around the perimeter of the area must be 60 metres long. The optimal width of the rectangular area is ?
*March 20, 2011 by Natascha*

**Algebra II**

12. A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4 r2 for the surface area of a sphere. (1 point) 64 x2 + 32 x + 4 64 x2 + 16 x + 4 *my answer 4 x2 + 32 x + 64 4 x2 + 4
*October 6, 2014 by Sandra*

**Math**

A ladder is in a safe position if the height it reaches on the wall is four times the distance of the base from the wall. To the nearest tenth of a foot, find the length of the following ladder. The ladder must reach a 16-foot height.
*May 7, 2013 by Cass*

**geometry**

Given the triangle ABC and m<A = 22; a = 6. Find the measurement of side b if angle C is the right angle.
*June 30, 2011 by Anonymous*

**algebra--1 question**

A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r^2 for the surface area of a sphere. 16(pi)x^2 + 16(pi) 16(pi)x^2 + 48(pi)x + 16(pi) 36(pi)x^2 + 48(pi)x + 16(pi) 36(pi)x^2 + 24(pi...
*March 24, 2015 by SkatingDJ*

**physics**

a point charge q=5.0 micro coulombs is placed at each corner of an equilateral triangle with sides .26 m in length. a. what is the magnitude of the electric field at the midpoint of any of the three sides of the triangle?
*September 10, 2007 by natash*

**math**

my daughter is working on calculating how many triangles point up in equilateral triangle. This is her bonus question: solve this problem for an equilateral triangle with sides measuring n units each. I'm lost, help.
*November 17, 2010 by adrianna*

**Algebra 1**

So as I was doing me hw, I ran into this question, and I cant figure it out... Anyone wanna try? 7. The ratio of the perimeters of two triangles is 2:5. The perimeter of the larger triangle is 20 cm. What is the perimeter of the smaller triangle?
*January 11, 2013 by Miranda*

**Math**

An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
*April 22, 2013 by Watson*

**Math**

An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
*April 23, 2013 by Watson*

**Math**

An airline has a plan in which a spouse can travel for 75% of the base cost of a ticket, and a child under 12 can travel for 50% of the base cost. a. Using the plan, what will it cost a married couple with three children under 12 to fly if the base cost is 280? b. what percent...
*October 30, 2011 by Alli*

**ECO301**

Give an example of a shift in consumer and producer surplus. How did it affect the market efficiency? Any non-subsidized farm product is a good example. Consider the local orchardists who sell peaches. When the weather is perfect, there is an abundance of the fruit. Since each...
*May 27, 2007 by tracey*

**Chemistry (How do I calculate) **

Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00 M concentration ...
*June 28, 2013 by Ashley*

**Math**

A right circular pole has a base radiur r and a vertical angle 2ydegrees.Find the height of the pole in terms of r and y
*March 3, 2012 by Anonymous*

**Math - Logarithmic**

log_5[log_4(log_3(x))] = 1 log_5 = log with the base of 5 log_4 = log with the base of 4 log_3 = log with the base of 3 Answer: 3^1024 Too many logs in one equation. . .I don't know how to solve it
*December 12, 2007 by Anonymous*

**geometry**

A 25-foot ladder is placed against a vertical wall of a building. The base of the ladder is 7 feet from the base of the wall. If the top of the ladder slips 4 feet, how many feet will the base of the ladder slide?
*May 14, 2010 by M*

**chem: study of kinetics**

im supposed to find the slope= -EA/R = triangle y/triangle x = (y2-y1) ________/(x2-x1)____________ how do i do this? is it the same as the slope that excel gave me? i have information from 3 different groups, and i have 3 x's and 3 y's, how do i solve this? the teacher told ...
*October 16, 2010 by chem*

**math**

lmagine an equilateral triangle and a square. The triangle has sides of 10 m and the square has sides of 15 m. One ant walks completely round the triangle twice and a beetle which walks two and a half times as fast starts walking at the same time around the square. How many ...
*January 12, 2014 by BRYAN*

**CAN SOMEBODY PLS GIVE ME THE FORMULA FOR THIS!!???**

google is being a pain right now so i cant find a simple answer, its giving me all these complex examples instead I JUST NEED THE FORMULA FOR FINDING THE LATERAL AREA OF A SQUARE PYRAMID. THAT'S ALL. thank you.....
*February 26, 2014 by TTR+S<3 *

**Math **

The radius of this circle is one unit. Find the exact lengths of the legs in the right triangle if: Sides a is twice as long as side b. And Sides b is twice as long as side a. Basically the hypotenuse of this triangle is 1 and we are trying to use the pythagorean theorem to ...
*December 12, 2015 by David D.*

**Math Help!**

The radius of this circle is one unit. Find the exact lengths of the legs in the right triangle if: Sides a is twice as long as side b. And Sides b is twice as long as side a. Basically the hypotenuse of this triangle is 1 and we are trying to use the pythagorean theorem to ...
*December 12, 2015 by David *

**Math: Pre-calculus**

A rancher wants to build a rectangular pen with an area of 180 . Let W be the width of the pen and L be the length of the pen. a) Find an equation for the perimeter P in terms of W and L . b) Use the given area to write an equation that relates W and L . c) Find the pen ...
*October 6, 2013 by Sarah*

**geometry**

find the surface area with a height of71 ft and a radius of 62 ft
*April 23, 2011 by Anonymous*

**geometry**

Find the area of a trapezoid with bases 14cm and 18 cm and height 10 cm.
*June 10, 2012 by Davon*

**Math Expert Help Me**

I posted this earlier but no one answered. :( 1. Given a scale factor of 2, find the coordinates for the dilation of the line segment with endpoints (-1,2) and (3,-3). a. (2,4) and (6,6) b. (2,4) and (6,6) c. (-2,4) and (6,-6) d. (2,-1) and (-3,3) 2. Given a scale factor of 1/...
*October 24, 2012 by Jman*

**Algebra**

A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r2 for the surface area of a sphere.
*March 7, 2014 by Sandra*

**Math Help!!!**

The triangles below are similar. Find the value of x. The first triangle has 14 on the right and left side and 18 on the bottom. The second triangle has 7 on the right and left side and x on the bottom. A. 9 B. 8 C. 10.5 D. 11 Is the answer B?
*November 11, 2014 by Callie*

**geometry**

I asked my teacher for a hint and he said that the pitcher's mound is not the radius. Am I supposed to assume that a side of a baseball diamond is 90? But that information wasn't given..... Still confused. If home plate is 60.5 feet from the pitcher's mound, find the distance ...
*October 18, 2011 by susan*

**Calculus**

These are the two problems from my homework I don't get.. can you help me? A: y=2x-x^3 [0,1] use the limit process to find the area of the region between the graph of the function and the x-axis over the given interval. Sketch the region B: f(x)=4-(12/(x^2))Calculate the lower...
*December 5, 2011 by Wesley*

**Calculus: Area **

Can someone look at my work and see what i did wrong. I did this 100 times but i keep getting it wrong Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=3x^(1/2) , y=4 and 2y+1x=4 y=3(x^(1/2...
*April 28, 2012 by jasmineT*

**physics**

Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.5110^8 N/m2 physics - bobpursley, Saturday, October 29, 2011 at 10:32am Hookes Law: elongation= force/...
*October 30, 2011 by maria*

**College algebra**

Use the properties of logs to write the expression as one log: 8log(base 5)4th square root of x minus 4log(base 5) x
*May 12, 2013 by Taylor*

**Calc.**

1000 yds of fence x 1000-x 1. Show that the area function to be maximized is A(x) = ( pi + 4 / 16pi) x^2-125x+62500 2. Show that the critical point of A(x) is x=1000pi/pi+4 3. 1000yds of fencing and y>2r, find the values of r and y that maximizes the area of this new region...
*April 18, 2012 by Al*

**algebra**

angles of a triangle The second angle of a garden triangle is four times as large as the first. the third angle is 45 degrees less than the sum of the other two angles. find the measure of each angle. 15 x 4=60 x 3 = 180 side a=15 side b = 60 sIDE C = 3
*August 24, 2014 by Jillian*

**Calculus**

Let f be the function given by f(x)=(x^3)/4 - (x^2)/3 - x/2 + 3cosx. Let R be the shaded region in the second quadrant bounded by the graph of f, and let S be the shaded region bounded by the graph of f and line l, the line tangent to the graph of f at x=0. Graph shown through...
*February 27, 2013 by Jessy152*

**Geometry**

Given a triangle with side lengths: root3, root3, 3, find the measure of its smallest angle.
*July 28, 2015 by Anonymous*

**PHYSICS**

A coil with an area of 0.10 m2 is in a magnetic field of 0.20 T perpendicular to its area. It is flipped through 180 so that the part that was up is down. The flip takes 1.0 s. Estimate the average induced emf between the ends of the coil while it is being flipped. What ...
*May 27, 2012 by Pat*

**Math**

Natalia constructed a right triangle with two side lengths measuring 3 and 5 units. She constructed a second right triangle similar to the first one, with the two corresponding sides measuring 5.1 and x units in length, respectively. What is the missing length, x, of the ...
*December 15, 2014 by Raylin*

**Math Help Please**

The radius of this circle is one unit. Find the exact lengths of the legs in the right triangle if: Sides a is twice as long as side b. And Sides b is twice as long as side a. Basically the hypotenuse of this triangle is 1 and we are trying to use the pythagorean theorem to ...
*December 12, 2015 by David *

**Algebra, URGENT!!!**

1) The first leg of a right triangle is 6 cm longer than its second leg. If the hypotenuse has a length of 8 cm, find the exact lengths of the two legs. First Leg: Second Leg: 2) The length of a rectangle is 10 m longer than its width and the area of the rectangle is 480 m2. ...
*November 20, 2013 by Bailey*

**Geometry**

Why is the apothem of an equilateral triangle its one third height?
*April 27, 2011 by Liana*

**Geometry**

Why is the apothem of an equilateral triangle one third its height?
*April 28, 2011 by Liana*

**maths**

the ratio of the length of sides of equilateral triangle to the height is ?
*January 6, 2013 by manpreet*

**Math Help**

I posted this earlier but no one answered. :( 1. Given a scale factor of 2, find the coordinates for the dilation of the line segment with endpoints (-1,2) and (3,-3). a. (2,4) and (6,6) b. (2,4) and (6,6) c. (-2,4) and (6,-6) d. (2,-1) and (-3,3) 2. Given a scale factor of 1/...
*October 24, 2012 by Jman*

**math**

a cone has a circular base, a perpendicular height of 42cm and asemivertical angle of of 30. Calculate the slant height of the cone
*February 4, 2016 by ifedayo olofintuyi*

**math 7th**

a right triangular prism has a length of 11 units.Its right triangle face has legs of 3 and 4 and a hypotenuse of 5. what is the surface area of the right triangular prism.
*March 18, 2014 by nazalynn*

**Geometry**

Draw a counter example that shows that the statement, "if a segment is parallel to one side of a triangle and intersects two other sides then it must be the midsegment of that triangle" is false. Please explain how i can prove this wrong! Thanks!
*November 30, 2015 by Misaki*

**Calculus**

A rectangle is bounded by the x-axis and the semicircle y= (25-x^2). What length and width should the rectangle have so that the area is maximum? Place the semi-circle so it's center coincides with the origin. If you go a distance x to the right the max height is sqrt(25-x^2...
*October 1, 2006 by Tezuka*

**math **

The formula form the surface area of a cube is SA=6s^2 where s represents the length of a side of the cube. What is the surface area of a cube with the sides 4.5 centimeters long?
*January 20, 2015 by Amy*

**Math**

1) Which of the following ingegers can not represent the lengths of the sides of a triangle? (9,10,11) (4.7,9) (4,8,12) & (6,6,11) Try drawing the 4,8,12 triangle. Have fun. any two sides must be longer than the third. Example with set 1. 9+10>11 10+11>9 11+9>10
*February 23, 2007 by Peggy*

**math**

you start with an equilateral triangle and then trisect each of the sides with a new equilateral triangle on the middle third of each trisection, repeat the process indefinitely how would you prove that the perimeter is infinite?
*February 8, 2009 by alex*

**Algebra**

What is the value of b in the triangle shown below? the trianle they show is a right triangle and the length shows 3b...the width just shows b...and the inside says 24 in^2 A.4 in B.4 in C.4 in D.no solution I think i is B..but its a guess..?
*February 24, 2013 by Cassie*

**Geometry**

Equilateral triangle ABC and isosceles triangle DBC share side BC. If angle BDC= 34 and BD=BC, what is the measure of angle ABD? I don't know how to solve this questions, can someone guide me through?
*November 26, 2014 by Ana*