Monday

September 22, 2014

September 22, 2014

Number of results: 50,451

**Algebra 2**

if an object is thrown vertically upward with an initial velocity of v from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s (where h and s are in ft t is in seconds and v is in ft/sec) If a rock is thrown upward from a height of 100ft, with an ...
*April 23, 2014 by Bri*

**algebra**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t16t Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?
*May 7, 2012 by Coach*

**algebra**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t16t Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?
*May 7, 2012 by Coach*

**math HELP**

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t16t Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?
*May 8, 2012 by Coach*

**PLEASE HELP ASAP!!!MATH**

Here was my question The mean height of 5 students is 59.4. If one of the students leaves, the mean height becomes 61. What is the height of the absent student? Heres Bob's answer but what does set them equal mean?? SOMEONE HELP! math - bobpursley, Wednesday, May 26, 2010 at ...
*May 27, 2010 by Michelle*

**Chemistry**

so i got a test and like usual my teacher didn't teach me half of the stuff that's going to be on it so he gave us a pretest of what is going to be on it and an answer key and i got several questions 13.) what is the pH of a formic acid if the concentration is .00055 M? ok so ...
*April 7, 2009 by Chemistry*

**Geometry**

One side of a triangle is x inches longer than another side. The ray bisecting the angle formed by these sides divides the opposite side into 3-inch and 5-inch segments. Find the perimeter of the triangle in terms of x. ( triangle angle bisector theorem) Let y be the small ...
*January 13, 2012 by Anonymous*

**Physics**

An object is thrown upwards at an initial speed of 19.6 m/s from a height of 65m. Determine how long will take for the object to reach the ground (time of flight). what formula should i use?
*August 29, 2012 by Anna*

**Maths**

There are 36 pupils in a class. Each girl is given 8 books and each boy is given 3 books. The total number of books the girls receive is 46 more than the total number of books the boys receive. How many girls are there in the class? The ratio of the number of boys to that of ...
*October 17, 2012 by Max*

**physics**

given a right triangle with hypotenuse of 12.5 cm, side y of 7.2 cm? find length of side x and size of other two angles? so you set it up as pythagoreum theory? 12.5= x^2 + 7.2
*October 20, 2009 by tim*

**MATH HELP!!!**

Given a right triangle with a side of length 4 and a hypotenuse of length 7, find the measure of the two acute angles. (Round to the nearest hundredth.)
*July 1, 2010 by Taylor*

**geometry **

find values for r and t such that the inequality r < S < t best describes s, the length of the third sides of a triangle for which the lengths of the other two sides are given. 11. 2 and 4 thanks for the help !
*October 27, 2010 by lisa*

**Math **

find values for r and t such that the inequality r < S < t best describes s, the length of the third sides of a triangle for which the lengths of the other two sides are given. 11. 2 and 4 thanks for the help !
*October 27, 2010 by lisa*

**GEOMETRY**

Which statement is the contrapositive of the following conditional: If a triangle is isosceles, then it has 2 congruent sides. a. If a triangle does not have 2 congruent sides, then it is not isosceles. b. If a triangle is isosceles, then it does not have 2 congruent sides. c...
*February 21, 2012 by LAUREN*

**physics**

A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F = kr v, where k is a constant. What are the SI base units of k?
*January 12, 2012 by niki*

**Ecomonics(Urgent,please respond)**

The table below shows the market basket quantities and prices for the base year (year 1) Base year 1 Price in price Quantity base year yr 2 Product Pizza 15 $3 $3.75 t-shirts 4 $10 $9 rent 1 $500 $550 In year 1 the CPI was? In year 2 the CPI was? I know that cpi= (expenditures...
*March 18, 2012 by Hannah*

**Geometry**

You purchased a scale model of the Statue of Liberty. The scale is 1:456. The model is 8 inches high and has a surface area of 0.052 ft^2. a. What is the height of the Statue of Liberty? b. What is the surface area of the Statue of Liberty? Thanks for helping!
*May 19, 2011 by Mary *

**calculus **

Can some explain how to do this problem? I tried using derivatives...but...I keep getting a different answer from what my teacher told me! A projectile is fired directly upward with an initial velocity of 144 ft/sec and its height (in feet) above the ground after t seconds is ...
*July 7, 2012 by help*

**uniport**

determine the area enclosed by the given boundaries: y=10-x^2and y=x^2+2.
*March 21, 2010 by mirian*

**Calculus**

Find the area of the region enclosed by the given curves: 4x+y^2=9, x=2y
*April 19, 2012 by Michael*

**geometry**

Find the total area for the cylinder with the given measurement. r = 2, h = 4
*June 21, 2012 by moe*

**Trig laws**

Given the area ABC=7.52m. Find a, when mB=40 and c=6m.
*June 22, 2014 by Anonymous*

**algebra**

Library Assignment When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where v is the initial velocity (speed) in ft/sec and k is the initial height in feet (as if...
*January 18, 2010 by hilda*

**Physics guide me through**

On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), 5.40 m from your sailboat. When you are 3.10 m below the surface, the top of the sailboat mast appears to you to be in a direction 40.0 from vertical. Calculate the height of the mast So i draw the figure ...
*September 1, 2010 by rudi*

**Geometry**

The Great Pyramid of Cheops has a square base of 771 sq ft. on a side and a height of 486 ft. How many rooms 35 ft.x20ftx8ft would be needed to have a volume equivalent to that of the Great Pyramid?
*January 10, 2011 by crystal*

**math**

Find the volume of a square pyramid with a base length of 9 cm and a height of 4 cm. 324 cm3 108 cm3 36 cm3 152 cm3 i think it could be d or b im kinda leaning towards d though
*March 6, 2013 by question*

**geometry**

Shape is a trapezoid: LINE AC = 12dm LINE FD = 13dm LINE BE = 14dm LINE CG = 10dm This line makes the right angle of the triangle What is the area?
*May 19, 2013 by beck*

**geometry**

Write a two column proof of the Corollary Triangle Sum Theorem. The acute angles of a right triangle are complementary. m<A + m<B=90degrees
*October 23, 2006 by Steve*

**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) (2) The measures of two supplementary angles are in the ratio 5:1. What is the measure of the smaller triangle?
*February 23, 2007 by Peggy*

**Physics**

An equilateral triangle has sides of 0.17 m. Charges of -9.0, +8.0, and +2.2 C are located at the corners of the triangle. Find the magnitude of the net electrostatic force exerted on the 2.2-C charge.
*January 26, 2009 by Z*

**physics **

An equilateral triangle has sides of 0.14 m. Charges of -9.2, +8.0, and +1.5 C are located at the corners of the triangle. Find the magnitude of the net electrostatic force exerted on the 1.5-C charge.
*January 23, 2010 by Anonymous*

**math**

The length of each side of a triangle is an even number. If no two of the sides are equal, what is the smallest perimeter the triangle coul d have? ans-18
*November 2, 2010 by dhiraj*

**physics**

An equilateral triangle with sides 2 m each has a charge of 30 μC at each of its three corners. Determine the electric field at a point 5 m above the center of the triangle.
*January 24, 2012 by Anuj*

**math**

which shape will create tessellation using only translations? A. scalene triangle B. regular hexagon C. equilateral triangle D. isosceles trapezoid
*April 2, 2013 by andrea*

**calculus**

You are planning to close off a corner of the first quadrant with a line segment 20 units long running from (a,0) to (0,b). Show that the area of the triangle enclosed by the segment is largest when a=b. Can anyone please give me some ideas to do it????THANKS A LOT!!
*December 3, 2008 by Toby*

**mathematics**

1. area of a triangle having autitude=7 cm and bass= 4 cm is : ??? 2. supplimentry angle of 84: ?? 3. a boy is asked to run 12 times around a rectangular field measuring 35m by25m find the total distance boy ran. Thanks
*May 12, 2010 by rebecca bhutto*

**physics**

t(s)=0.0,1.0,2.0,3.0,4.0,5.0,6.0,7.0 v(m/s)=0.0,4.6,8.9,13.4,18.0,22.9,27.6,32.0 find the area underneath the graph between t=2.0s and t=6.0s, i know i will have to break this down into two separate shapes, a rectangle and a triangle then add them together, i just don't know ...
*February 8, 2012 by Annie*

**calculus**

The volume of a right circular cone is given by V=(1/3)[pie]r^2h, where r is the raius and h is the height Find (dV/dt) if r=4,h-5,(dr/dt)=6, and (dh/dt)=-3
*March 2, 2008 by Anonymous*

**calculus**

The volume of a right circular cone is given by V=(1/3)[pie]r^2h, where r is the raius and h is the height Find (dV/dt) if r=4,h-5,(dr/dt)=6, and (dh/dt)=-3
*March 4, 2008 by Anonymous*

**Math**

The height h in feet of an object after t seconds is given by the function. h=-16t^2+40t+9
*June 8, 2010 by Anonymous*

**physics**

how do you find time when all you're given are two different speeds the height and the angle?
*December 12, 2011 by Yuli*

**Math (please help steve)**

In triangle ΔABC, AB^2+BC^2+AC^2=cosAsinBsinC+sinAcosBsinC+sinAsinBcosC. The area of the circumcircle of ΔABC can be represented as a/bπ, where a and b are positive coprime integers. What is the value of a+b?
*August 12, 2013 by Anonymous*

**Math. I really don't get this question**

three circles are manually tangent externally. their centers form a triangle whose sides are of length 8, 9, 13. find the total area of the three circles
*December 10, 2013 by Liz*

**Algebra 1 urgent **

(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that solved into y=ax*2+bx+c ...
*September 5, 2013 by Taylor *

**Algebra/Trig Check Answers please **

Can you please check these answers thanks 1. A ladder 14 feet long is leaning against a house. The foot of the ladder is 4.8 feet from the house. Find the angle of elevation of the ladder and the height it reaches on the house. Answer: 13.2=height 18.9 =angle of elevation 2. ...
*February 11, 2012 by Missy*

**math**

I am trying to figure out the surface area of a garage. It has an A shaped roof. There is an overhang of 0.5m on each corner. Do I include this in determining the area of the roof? I need to figure out how much stucco is needed for the garage minus roof, window, and door. If i...
*September 24, 2013 by Cherie*

**AFM**

Show the solutions of the two examples given in the notes. (Hint: Finding a "solution" means solving for all missing sides and angle measures in each triangle.) (a) If a = 4, b = 3, and A = 36o. (b) If a = 3, b = 4, and A = 48.59o
*January 3, 2013 by Kiana*

**Algebra 2**

Demand for pools. Tropical Pools sells an above ground model for p dollars each. The monthly revenue for this model is given by the formula R (p) = - 0.08p2 + 300p. Revenue is the product of the price p and the demand (quantity sold). a) Factor out the price on the right-hand ...
*February 22, 2009 by Nina*

**Algebra**

Demand for pools. Tropical Pools sells an above ground model for p dollars each. The monthly revenue for this model is given by the formula R (p) = - 0.08p2 + 300p. Revenue is the product of the price p and the demand (quantity sold). a) Factor out the price on the right-hand ...
*February 22, 2009 by jackie*

**Algebra**

The maximum velocity of a roller coaster depends on the vertical drop from the top of the highest hill to the bottom of that hill. The formula:V(h)=sqrt(h-2) , gives the relationship between maximum velocity, V(h) in feet per second, and height, h in feet. 1. Identity the ...
*November 3, 2013 by Dele*

**Algebra**

The maximum velocity of a roller coaster depends on the vertical drop from the top of the highest hill to the bottom of that hill. The formula:V(h)=√h-2 , gives the relationship between maximum velocity, V(h) in feet per second, and height, h in feet. 1. Identity the ...
*November 3, 2013 by Dele*

**physics help please!!!**

From what maximum height can a 61 kg person jump without breaking the lower leg bone of either leg? Ignore air resistance and assume the CM of the person moves a distance of 0.65 m from the standing to the seated position (that is, in breaking the fall). Assume the breaking ...
*March 14, 2010 by Anonymous*

**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*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Chemistry**

Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
*January 24, 2013 by Raphael*

**Basic Caluculus**

f(x)=2x^3-x^2+1 [1,4]=interval Using the limit process, (once with right endpts, and the other with left entdpts.) find the area under the curve and above the x-axis on the given interval i got the area to be 107.5 for right endpts. (not sure if its right) but what about the ...
*May 29, 2011 by Munni*

**trig**

Question Part Points Submissions Used The angle of elevation to the top of a very tall Building is found to be 7 from the ground at a distance of 1 mi from the base of the building. Using this information, find the height of the building.
*October 2, 2011 by sanam*

**math**

a baseball diamond is actually a square. the distance between bases is 90 feet. when a runner on first base tries to steal second, a catcher has to throw from home to second base.how far is it between home and second base?
*September 18, 2012 by daniel*

**Bio**

a) Make a single base pair substitution mutation in the gene below that results in a mature mRNA that is shorter than the mature mRNA produced by the original gene. When you are satisfied with your change and its effect, click the "Final Check" button. Note that a "single base...
*May 14, 2013 by Amos Amines*

**maths**

Choose three options which are true: a) an angle of 150 degrees is equivalent to 2pie/3 radians. b) Cos 0 = cos (0 pie/2) for al values of 0. c) Sin 0 = cos (0 pie/2) for all values of 0. d) If triangle ABC has a right angle at B, then sin A = cos C e) In any triangle ABC...
*May 20, 2007 by sarah*

**chemistry - empirical formula**

write the empirical formula for each of the following molecular formulae" a)P4O10 b)C2H6 Confused as to what the diff.is b/w empirical and formula...have no idea how to answer these b/c they look like empirical formulas to me
*May 23, 2008 by Sarah*

**Chemistry**

Classify the following as: Weak or strong acid, weak or strong base, salt (from weak/strong acid and base). If appropriate, split the formula into its component ions. HNO3 So far, all I have is: HNO3 + H2O -> NO3^- + H3O^+ And I know HNO3 is a strong acid. What would I do ...
*May 26, 2007 by Raj*

**Algebra**

The formula T=2π√L/480 can be used to find the period (T in seconds, the time it takes a pendulum to complete one cycle) of a pendulum that is L cm long. (a)Rewrite this formula using rational exponents. Don't forget to rationalize the denominator. (b)Solve the ...
*June 11, 2011 by Melvin*

**Algebra**

Please help I don't have any clue on how to solve this problem!!! Please help! Suppose you are tossing an apple up to a friend on a third story balcony. After t seconds, the height of the apple in feet is given by h = -16t^2 + 38.4t + .96. Your friend catches the apple just as...
*January 20, 2008 by Bretagne*

**Macroeconomics**

Ok so this probably seems easy but I am not sure how to work these. We are given a table with data Price Paper Price 2010 2 100 2.5 2011 3 125 3 2012 4 150 3.5 we are usig 2011 as base year a) what is nomial GDP? b) Real GDP? c) GDP Price Index d) CPI Is nomial just ...
*September 12, 2012 by Isis*

**geometry**

A manufacturer made a container that looked like the Washington Monument to fill with raisins, as shown. Find the volume of the container. The base has the front and sides as 2 and 2 inches the height is 5 in and the 2 inches.
*May 27, 2013 by Hannah*

**geometry**

A manufacturer made a container that looked like the Washington Monument to fill with raisins, as shown. Find the volume of the container the sides on the bottom are 2 inches for the base and the height is 7 inches
*May 28, 2013 by Hannah*

**Geometry**

The surface area of acone with height 15 cm is 500π square cm. Find the radius of the cone. Round your answer to two decimal places.
*June 1, 2011 by John*

**precal**

use a right triangle to write the expression as an algebraic expression. assume that x is positive and in the domain of the given inverse trigonometric function. sin(sec^-1 x^2+ 25/(x))
*March 8, 2010 by adam2*

**Geometry-EXtended Exponents**

Use the given ratio and information in the figure to find the value of the variable(s). XY:YZ:XZ=7:10:14 XY=b-7 These are side lengths YZ=b+20 to a triangle. Side XZ=5c-24 note XZ is the hypotenus
*November 29, 2010 by chica*

**trig**

A plane is flying 225 mph heading South 25West. The wind is blowing South 80East at 60 mph. What is the bearing of the plane? What is the smallest angle of the triangle? What is the largest angle of the triangle? What is the remaining angle of the triangle? What is the ...
*May 26, 2011 by Anonymous*

**math**

A childrens play area is triangular. The sides of the play area measure 90m ,225m and 255m respectively . Calculate the area of the play area?
*July 26, 2012 by donovan*

**Math**

A children's play area is triangular. The sides of the play area measure 90m, 225m and 255m respectively. Calculate the area of the play area.
*August 31, 2012 by Danielle*

**chemistry**

Write down a balanced acid-base reaction given the following reactants Reactants: NaOH(aq) + HCl(aq)
*February 10, 2011 by jonh*

**CHEMISTRY!!!**

Calculate the equilibrium constant for the following reaction of a weak acid and base HF + NH3 <=> NH4+ + F- given Ka (HF) = 6.9 x 10^-4 and Kb (NH3) = 1.8 x 10^-5 and Kw = 1.0 x 10^-14
*April 17, 2011 by max*

**Geometry**

My class is learning about the areas of regular polygons and circles and I'm so confused. How are you supposed to figue out the area a regular triangle inscribed in a circle when all you know is that the radius of the circle is 1.5?
*April 29, 2011 by Sam*

**geometry**

f equilateral triangle JKL is cut by three lines as shown above to form four equilateral triangles of equal area, what is the length of a side of one of the smaller triangles?
*March 29, 2012 by Anonymous*

**Organic chem**

Classify each as a lewis acid or lewis base... A)H20 B)O2- C)Cu2+ D)SO3 E)AlCl3 Lewis acids are electron pair acceptors. Lewis bases are electron pair donors. Look at H2O, for example. .. H:O: .. H This molecule has no "holes" to accept an electron. Would you expect this to be...
*October 15, 2010 by Adam*

**Math **

Two triangles r the same height. The slope side of triangle A is double the slope of B. how do the lengths of these two triangles compare? My last question please help
*January 23, 2014 by Raksha *

**math**

If a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 10t + 330, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth...
*June 10, 2011 by Sam*

**5th grade**

The square and triangle have the same perimeter 12cm.Each figure is made up of sides of equal measure.How long is each side of the triangle ?
*April 25, 2010 by Anonymous*

**Math**

Bren sets the table. He takes a square napkin and folds it in half. He makes a triangle. What two names can you use to describe the triangle?
*April 6, 2012 by Lynne*

**math**

the length of a rectangle exceeds its breadth by 4cm. The length and breadth are increased by 3 cm .The area of the new rectangle will be 81cm square more than the given rectangle .Find the dimensions of the given rectangle?
*August 14, 2012 by TUHITUHI*

**CHEMISTRY**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid ...
*November 9, 2011 by Alexander*

**Chemistry**

Strong base is dissolved in 675 ml of 0.200 m weak acid (ka=3.25x10^-5) to make a buffer with a ph of 3.95. Assume that the volume remains constant when the base is added. HA + OH ---> H2O + A^- calculate the pka value of the acid and determine the number of moles of acid ...
*November 9, 2011 by Alex*

**Math**

The largest multi-story building built by the Anasazi Indians called the Pueblo Bonito. The shape of its foundation is nearly parabolic, with a base (at the top of the photo) of about 500 feet and a height of about 300 feet. 1. Sketch the multistory building on a coordinate ...
*November 14, 2012 by Mike*

**math**

is a triangle with sides 7-7-7 a right triangle
*March 19, 2010 by PAVLEEN*

**math**

can a right triangle be a scalene triangle?
*October 31, 2010 by gmoney*

**30-60-90 triangle**

The hypotenuse of a 30-60-90 triangle is 10. Find the perimeter. How do i do that?
*March 28, 2011 by Jesse*

**algebra**

triangle 1 is 6,16,32 triangle 2 is 9,24 h they are similar how do i find h?
*March 12, 2012 by becca*

**M.I.G**

Can a right-angled triangle be an isoscele triangle?
*January 24, 2013 by njebo*

**math**

if the angle of a triangle are in a ratoi 5:5:8 what is the triangle
*March 11, 2013 by khanyisile*

**math**

Is a triangle with sides of 25,20, 15 a right triangle?
*October 12, 2013 by Steve*

**trigonometry **

Use the given information to solve the triangle. 1) C = 145 degrees, b = 4, c = 14. 2) A = 150 degrees, C = 20 degrees, a = 200.
*December 15, 2011 by Britt *

**calculus**

A rectangle is constructed with its base on the diameter of a semicircle with radius 5 cm and with two vertices on the semicircle. What are the dimensions of the rectangle with maximum area?
*November 4, 2010 by Bob*

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