Thursday

October 23, 2014

October 23, 2014

Number of results: 16,531

**Pre-Calculus-Trig**

A straight road slopes at an angle of 10 degrees with the horizontal. When the angle of elevation of the sun (from horizontal) is 62.5 degrees, a telephone pole at the side of the road casts a 15 foot shadow downhill, parallel to the road. How high is the telephone pole?
*January 30, 2011 by Chloe Mack*

**algebra**

a landing airplane, moving in a straight line , passes over two points (p and q) which are 300 feet apart. when the airplane is above p, as seen from Q, its angle of elevation is 60 degress, and when above Q, as seen from p, its angle of elevation is 40 degress. at what ...
*July 19, 2011 by alex*

**Math **

tan(-120)= sqrt 3 OR - sqrt 3 (Helper stated that it was sqrt 3) But, I'm just confused over this part: for even vs. odd functions it saids that tan(-angle) = - tan(angle) so the even vs. odd doesn't matter since tan is positive in the QIII?
*March 1, 2011 by Amy*

**maths**

Choose the two options which are true for all values of x 1) cos (x) = cos ( x – pie/2) 2) sin (x + pie/2) = cos (x – pie/2) 3) cos (x) = sin (x – pie/2) 4) sin (x) = sin (x + 4pie) 5) sin (x) = cos (x – pie/2) 6) sin^2 (x) + cos^2 (x) = pie would it be 1 and 3 ?? I helps if ...
*April 22, 2007 by katie*

**calculus**

Could someone help me draw these vectors? These things confuse me. A force of 42 newtons acting on an object at an angle of 53 degrees with the ground A force of 342 lbs. acting on an object while a force of 454 pounds acts on the same object an angle of 94 degrees with the ...
*February 21, 2010 by Jim*

**geometry**

Hi! I have a Geometry worksheet I need to get done for tomorrow. It's a really easy thing, I guess...but I'm a bit stuck. The measure of an angle is six more than twice the measure of its supplement. Find the measure of the angle. A. 58 B. 62 C. 118 D. 122 It doesn't have a ...
*February 23, 2009 by mathdork*

**Engineering**

The boat is to be pulled onto the shore using two ropes. If the resultant force is to be 400N, directed along the keel, determine the magnitudes of forces T and P acting in each rope and the angle theta of P so that the magnitude of P is a minimum. T acts at 30 degrees from ...
*October 13, 2009 by Claire*

**college physic**

a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 328 m/s, there are the two possible angles è1 and è2 between the rifle barrel and the horizontal such that the bullet will hit the target. One of these angles is so large that...
*February 23, 2011 by jc*

**geometry**

place each given figure in a coordinate plane. what are the coordinates of each vertex? a) a right triangle b) an isosceles triangle
*February 2, 2008 by anne*

**Physics**

a plane flying at 90 degrees and 100 ms is blown toward 180 degrees at 50 ms. What is the resultant velocity and direction?
*October 25, 2010 by Jennifer *

**vectors**

find the vector form of the equation of the line in lR^3 that passes through P=(-1,0,3) and is perpendicular to the plane with a general equation x-3y+2z = 5
*January 12, 2011 by Meso*

**magee **

Whenever you use a inclined plane a. deis ezual to dr b. dris zero, c. deis less than dr, d. de is greater than dr
*January 17, 2011 by Bet*

**geometry**

when two angles in a plane share a vertex and a side but no common interior points, they are called_________ angles ?
*August 10, 2011 by christina*

**algebra**

the plane flies 725 miles per hour. how many minutes will it take to fly 150 miles
*September 15, 2011 by anthony*

**physics**

suppose a plane drops water from 1024 feet. how many seconds will it take for the water to hit the ground?
*October 19, 2011 by grant*

**trigonometry**

A pilot is flying with an air speed of 185mph. Find the ground speed of plane and the direction of flight.
*November 15, 2011 by Anonymous*

**geometry**

An airplane descends 3.5 miles over a horizontal distance of 25 miles. How far did the plane actually travel?
*January 18, 2012 by Todd*

**Physics**

If the block slides down the incline at a constant speed, what is the force of friction between the block and the plane?
*January 22, 2012 by Katherinee*

**math**

when a cross tile is placed on a number plane the centre number is the average of al the numbers covered. Explain why
*April 16, 2012 by julia*

**physics**

an object is moving up and inclined plane its velocity changes from 15 cm\sec to 10 cm\sec in 2 seconds .what is its acceleration solve
*July 6, 2012 by Anonymous*

**physics 11**

A girl stands 2.5 m infront of a plane mirror. If she steps 0.5 m farther away from the mirror, how far will she be from her image?
*February 10, 2013 by Abe*

**maths**

Two points X and Y in the xy plane have coordinates (10,5) and (a,b), respectively. The midpoint of the line segment XY has coordinates (13,13). What is the value of a+b?
*June 8, 2013 by vranda*

**physics**

A bomb is dropped out of a plane 100 m above the ground, how fast will it be moving when it hits the ground?
*January 23, 2014 by Marina*

**math**

15. which of the following figures will not tessellate the plane? a. rhombus b. equilateral triangle c. regular hexagon d. regular pentagon
*April 18, 2014 by Anonymous*

**math **

A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?
*May 13, 2014 by Anonymous*

**mathematics **

The plane curve is given by the equation R(t)= ( ln sin t)i + ( ln cos t)j. find the unit normal vector to the curve t= ¤Ð/6.
*June 27, 2014 by sibongile*

**Linear Algebra**

Find a scalar equation of the plane that contains the given point P=(-3,-3,1)and the given normal vector n = (-1,4,7)
*September 24, 2014 by Aegon*

**precalculus**

If a projectile is fired with velocity v0 at an angle θ, then its range, the horizontal distance it travels (in feet), is modeled by the function R(θ) = v02 sin 2θ 32 . If v0 = 2600 ft/s, what angle (in degrees) should be chosen for the projectile to hit a ...
*October 28, 2012 by Ama*

**Physics**

Leg traction is applied to a patient's leg as shown in the figure below. If the physician has requested a 57 N force to be applied to the leg, and the angle is θ = 60o , what mass m must be used for the object hanging from the massless cable? So < represents angle ...
*October 14, 2009 by Sam*

**Geometric & Wave Optics**

A beam of light wavelenght 560 to availing in air is incident on a surface of a transparent material. The incident beam makes an angle of 65degree with the normal and the refracted beam makes an angle of 45degree with the normal. calculate the refractive index of the material.
*July 21, 2009 by Matrix School 2*

**math**

An electric pole is supported to stand vertically on a level ground by a tight wire. The wire is pegged at a distance of 6 meters from the foot of the pole. The angle that the wire makes the ground is three times the angle it makes with the pole. Calculate the length of wire ...
*May 29, 2012 by Anonymous*

**Math**

At a distance of 56 feet from the base of a flag pole, the angle of elevationi to the top of a flag that is 3.1 feet tall is 25.6 degrees. the angle of elevation to the bottom of the flag is 22.9 degrees. the pole extends 1 foot above the flag. find the height of the pole.
*April 7, 2012 by Tina*

**math**

Charlotte divided a whole pizza into 4 pieces. one piece formed a straight angle. one piece formed a right angle. 2 pieces formed acute angles with the same degree. Draw the angles
*February 18, 2014 by tommi*

**Chemistry**

I am stuck in this problem I need to calculate the molality first so I could find T but I don't know which one is the solvent and which one is the solution the problem is to calculate the freezing point of a solution containing 12.2g of benzoic acid, dissolved in 250g of ...
*October 27, 2008 by Maria*

**PSYCHOLOGY**

How do classical conditioning procedures differ from operant conditioning procedures? How are they similar? In your opinion, which learning process is more effective? Why? How do we see observational learning being used in the work place? How do we see observational learning ...
*April 7, 2010 by MISSY*

**Physics**

A ray of light of frequency is 5.09 x 10^14 Hz is traveling from water to medium X. The angle of incidence in water is 45 degrees and the angle of refraction in Medium X is 29 degrees. The index of refraction of Medium X is 1.94. Calculate the wavelength for each medium. What ...
*April 19, 2011 by Allyse*

**trigonometry**

An observer at A looks due north and sees a meteor with an angle of elevation of 70deg. At the same instant, another observer 30miles east of A, sees the same meteor and apprroximates its position as N 50deg W but fails to note its angle of elevation. Find the height of the ...
*August 10, 2010 by Winsel*

**math - 8th grade**

I have a table to complete.Given that points A and B belong to a circle with centre O; If the area of the sector bounded by central angle AOB is 14.13cm squared and the measure of central angle AOB=45cm squared. What is the radius of the disk(cm)and what is the area of the ...
*May 8, 2011 by Br*

**geometry**

Which of the following statements is true?Select one of the options below as your answer: A. A 25o angle is congruent to a 25o angle. B. Two intersecting lines form two pairs of congruent angles. C. It is possible for congruent angles to add up to 90o. D. All of the above are ...
*November 8, 2011 by angelique*

**math**

An electric pole is supported to stand vertically on a level ground by a tight wire. The wire is pegged at a distance of 6 meters from the foot of the pole as shown. The angle that the wire makes the ground is three times the angle it makes with the pole. Calculate the length ...
*May 27, 2012 by anonymous*

**Al**

Factoring to solve quadratic equations: Find the value of x as it relates to the triangle. Area = 600 cm^2 There is a large triangle that is divided by a 90 degree angle in the middle. That 90 degree angle line is "x" and the complete bottom of the large triangle is "2x +2". ...
*April 13, 2013 by Jane*

**geometry**

Which of the following statements is true?Select one of the options below as your answer:A. A 25o angle is congruent to a 25o angle. B. Two intersecting lines form two pairs of congruent angles. C. It is possible for congruent angles to add up to 90o. D. All of the above are ...
*June 12, 2013 by Madison*

**Math**

If Kate is flying a kite on the field and she lets out 20 meters of string and at the same time her friend Abigail is watching in the distance The angle of elevation of the kite from her position is 65 degrees And the angle of elevation of the kite from Abigail's position is ...
*June 9, 2014 by Matt*

**math**

i am a relflex angle. all the digits in my angle measure are even. all of my digits are different. all three of my digits are factors of 8. my tens digit is greater than my one digit. what is my measure?
*April 4, 2011 by janet*

**Reading**

The Great Depression http://encarta.msn.com/encyclopedia_761584403/Great_Depression_in_the_United_States.html
*March 26, 2007 by Catie*

**physics**

an amusement park ride consists of a rotating circular platform 7.4 m in diameter from which 10 kg seats are suspended at the end of 1.81 m massless chains. when the system rotates, the chains make an angle of 26.6 degree with the vertical. the acceleration of gravity is 9.8 m...
*November 21, 2010 by vanessa*

**Physics**

You are riding on a Jet Ski at an angle of 35¢ª upstream on a river flowing with a speed of 2.8 m/s. If your velocity relative to the ground is 9.5 m/s at an angle of 20.0¢ª upstream, what is the speed of the Jet Ski relative to the water? (Note: angles are measured relative ...
*March 13, 2008 by Clarita*

**calculus**

Being some distance from a mountain a man looks up at a 9 degree angle to see the top of the moutain. he then moves 13 miles away from the mountains at looks up at a 3.5 degree angle to see the top of the mountain. How tall is the mountain?
*December 4, 2011 by john*

**U.S. History**

Which one of these was not the causes of the Great Depression? excessive income taxes speculative stock purchases risky banking practices severe drought I think it is excessive income taxes or severe drought. But I don't think it is severe drought because of the Dust Bowl. But...
*April 11, 2012 by Ricky*

**Angles...**

How do i express angles in a radian measure as multiples of pi. For example, suppose i have an angle of 30 degrees, and a angle of -270 degrees. How would I express them in a radian measure as a multiple of pi?. Thanks.
*January 6, 2008 by Matt*

**Math**

Which theorem or postulate states that if the hypotenuse and an acute angle of one right triangle are congruent to the hypotenuse and corresponding acute angle of another right triangle, then the triangles are congruent?
*June 5, 2011 by Sabrina*

**Geometry**

There is something wrong with this definition for a pair of vertical angles: "If line AB and line CD intersect at point P, then angle APC and angle BPD are a pair of vertical angles. What is wrong??!?
*August 26, 2011 by Max*

**geometry**

A picture frame is shaped as a heptagon. The measure of one angle is 126°. The remaining interior angles are congruent. What is the measure of each remaining interior angle in the picture frame?
*November 2, 2011 by vvfdhdh*

**Algebra 2**

consider the interior angles of the triangle with vertices p=(=4.39,-0,948) q=(3.03,8.31) r=(4.21,6.54) find the angle of the vertex of p answer in units of degrees find the angle of vertex q answer in units of degrees
*October 18, 2012 by Emily*

**math**

a tree is x meter high the angle of elevation of its top from a point p on the ground is 23 degree . from another point q 10 meter from p and in line with p and foot of the tree , the angle of elevation is 32 degree. find x
*September 17, 2013 by huss*

**need asap trigg**

simplify the expression by using a double angle formula or a half angle formula: a. 2 tan 7 degrees /1-tan^2 7 degrees b.2 tan 7 theta / 1-tan^2 7 theta
*March 3, 2014 by Kaylee*

**physics**

A woman at an airport is towing her 27.0 kg suitcase at constant speed by pulling on the strap at an angle θ above the horizontal. She pulls on the strap with a 32.0 N force, and the friction force on the suitcase is 11.0 N. (a) What angle does the strap make with the ...
*June 8, 2008 by Elisa*

**Physics**

A woman at an airport is towing her 20.0 kg suitcase at constant speed by pulling on a strap at an angle θ above the horizontal. She pulls on the strap with a 35.0 N force, and the friction force on the suitcase is 20.0 N. a) What angle does the strap make with the ...
*October 5, 2011 by Stephanie*

**physics**

A woman at an airport is towing her 21.0 kg suitcase at constant speed by pulling on the strap at an angle of è above the horizontal (Fig. P4.40). She pulls on the strap with a 34.0 N force, and the friction force on the suitcase is 11.0 N. (a) What angle does the strap make ...
*October 14, 2011 by savannah*

**stats**

A researcher investgating depression devises a study that contains the independent variable "Treatment," manipulated between-participants. Participants may experience "psychodynamic therapy," "cognitive behavioral therapy," "medication," or "waiting list placement." How many ...
*March 1, 2009 by ash*

**stats ?**

A researcher investgating depression devises a study that contains the independent variable "Treatment," manipulated between-participants. Participants may experience "psychodynamic therapy," "cognitive behavioral therapy," "medication," or "waiting list placement." How many ...
*March 2, 2009 by ash*

**business law**

Adam’s godmother, Helen, is 93 years old and in poor health. Helen is a life-long alcoholic and has a history of depression and bipolar disorder. At the party celebrating Adam’s high school graduation, after consuming several Double Martini’s, Helen, clearly intoxicated, ...
*December 1, 2009 by scoobies law*

**AP Physics**

A woman at an airport is towing her 17.0 kg suitcase at constant speed by pulling on the strap at an angle of θ above the horizontal (Fig. P4.40). She pulls on the strap with a 26.0 N force, and the friction force on the suitcase is 10.0 N. What angle does the strap make ...
*October 5, 2010 by Frank*

**math**

ive been working on my sat's and i cant seem to figure out how to answer the following question. a right angle is given. the length of ba is 20. what is the approx length of bc? sin= .643 cos= .766 tan= .839 the answer is 12.9 but i dont know how that is. I assume bc is the ...
*July 14, 2007 by bart*

**Algebra II**

1. Find the value of 5 + 8 x 2 divided by 4 - 11 2. Evaluate (a-y)^2 + 2y^3, if a =2 and y= -3 3. Evaluate -|a-3b|, if a=-2 and b = 6 4. The formula A= 180 (n-20 OVER N relates the measure A of an interior angle of a regular polygon to the number of sides. If an interior ...
*May 4, 2008 by PJ.*

**physics**

A 24 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90 degrees and the beam is inclined at an angle of 13.6 degrees with respect to the horizontal. What is the magnitude of the force that the beam...
*November 18, 2009 by Andy *

**Physics**

A car with fuzzy dice hanging from the rear view mirror by a single string drives along at a constant 25.0 m/s. a) If the dice have a mass of 0.030 kg, what is the angle of the string (relative to vertical)? b) What is the tension in the string? c) As the driver takes a turn ...
*July 26, 2012 by Zac*

**physics**

Kenny pulls with a force of 850 N. Justin pushes with a force of 650 N. The crate weighs 1250 N and sits on a ramp that is 40 degrees from the horizontal. Tyler is pushing at an angle of 35 degrees with respect to the crate. There is an angle of 50 degrees between Tanner's ...
*January 13, 2010 by lucy*

**physics**

A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, toward the wall on the right. If the reflected beam is to hit a target on the back wall .80 of L from the right ...
*April 20, 2014 by ML*

**chemistry**

The vapor pressure of pure water at 70°C is 231 mm Hg. What is the vapor pressure depression of a solution of 115 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of water? Use molar masses with at least as many significant figures as the data ...
*December 12, 2012 by Brad*

**KC**

When a plane experiences a decrease in weight must there also be decrease in lift? I'm thinking the answer is yes in order to maintain equilibrium.
*March 11, 2009 by Physics*

**math**

A diameter of circle that has endpoints (-4,12) and (8,-2), as shown below, is in the standard (x,y) coordinate plane. What point is the center of the circle? Explain
*April 21, 2009 by Helen*

**calculus**

Find the equation of the following. The locus of all points in a plane such that the sum of the distances from points (-2,-1) and (-10,-1) is equal to 6.
*April 8, 2010 by Jamie*

**math**

A plane that flies 170 miles per hour is flying 510 miles. How long will the trip take?
*April 28, 2010 by joe*

**physics**

It takes a plane flying at 150 km/h, 3.0 minutes to fly around a cloud at an altitude of 3000m. What is the diameter of the cloud
*January 25, 2011 by Aidan*

**Physics 30**

It takes a plane flying at 150 km/h 3.0 minutes to circle around a cloud at an altitude of 3000m. What is the diameter of the cloud?
*January 25, 2011 by Simon*

**English**

Is it OK to say "the plane was delayed by two hours?" Thank you for all your previous explanations. Can you say " I had my blood tested"?
*October 3, 2011 by Henry2*

**physics**

which will reach the bottom first, a hallow cylider or a solid cylider wth the same mass in an inclined plane?
*February 9, 2012 by aa*

**PHYSICS**

A Cessna 350 must reach a speed of 35 m/s for takeoff. If the plane accelerates at a steady 3.8 m/s2, how long must the runway be?
*September 13, 2012 by sara*

**Calculus**

The location of a dot P at a given time t in the x-y plane is given by (x,y) = (t - sin t, 1 - cos t). What is the distance traveled by P in the interval 0 <= t <= 2pi
*March 6, 2013 by Tony*

**Math**

A plane leaves point A and flies S80° E to point B400 km away. How far east of A is B (to the nearest kilometer)?
*April 6, 2013 by Vincent *

**physics**

A square loop 23.5 on a side has a resistance of 2.80 . It is initially in a 0.575 magnetic field, with its plane perpendicular to , but is removed from the field in 35.0 .
*May 27, 2013 by melissa*

**Math**

What is the maximum number of points of intersection of two different lines and three different circles in the same plane?
*December 6, 2013 by Xian*

**math**

Ten distinct noncollinear points are chosen on a plane. a) How many line segments can be formed by joining any two of these points?
*January 14, 2014 by Tintin*

**plane and spherical trigonometry**

trigonometry in oblique triangles
*August 3, 2014 by keicer*

**math**

um take home test...i have no idea what im doing always sometimes never 1. sin2x=2sinx 2. cos (pie/3+x)=-sinx 3. if tan x=3 and tan y=2 then tan (x+y)=5 4. when you use the half angle formulas you choose whether to use a + or - by noting in which quadrant the angle lies 5. ...
*June 11, 2006 by allison*

**Physics**

Rachel Pulls her 18 KG suitcase at at a constant speed by pulling on a handle that makes and angle (theta) with the Horizontal the frictional force of the suitcase is 27 N and Rachel exerts a 43 N force on the handle What angle does the handle make with the horizontal?
*October 25, 2010 by Anonymous*

**pre calc**

each of three circles touches the other 2.circle A has a radius of 8 cm. circle B has a radius of 4 cm.circle C has a radius of 1 cm.a triangle is formed by connecting the centers of the 3 triangles. determine the largest angle for the triangle and in which circle is the ...
*December 8, 2011 by bob*

**Maths **

In two right angeled triangles, one sides and acute angle of one triangle are equal to one side and the corresponding acute angle of the other triangle, prove that the two triangles are congruent.
*July 29, 2012 by Anupam khatiwara*

**math **

The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is __degrees.
*September 7, 2012 by Kelly*

**Phyics**

A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.710. Find the smallest value for the angle , such that the lower end of ...
*November 10, 2013 by Bobby*

**History Thesis....**

can anyone help me is this a good thesis if not what can I change I am lost.... Harold Grey’s Little Orphan Annie comic strip provided a message that helped people get through the Great Depression, it is suggested that this comic strip provided America with understanding of ...
*November 5, 2009 by Deb*

**Chemistry**

Consider the below three solvents and the corresponding values of Kf for each. Prove, using the formula for Kf, which one of these solvents would allow for the most sensitive procedure for determining the molar mass by the freezing point depression method. Explain well to ...
*February 13, 2012 by Heaton*

**social studies please help **

what sis franklin roosevelt do to reduce the effects of the depression the day after he became president? a. he closed the stock market to prevent further losses b. he signed a bill to provide money to industries so they could reopen and put people back to work c. he closed ...
*April 8, 2014 by what*

**Grammar **

Is the following senetence considered an run-on one? Should I revise it? "To Kill a Mockingbird by Harper Lee features the esteemed novel’s protagonist, a young girl named Jean Louise “Scout” Finch who lives with her beloved older brother, Jem (Jeremy), and their father, ...
*April 15, 2014 by Victoria*

**physics**

A reflection grating is required which can resolve wavelengths as close as 0.002 nm in second order for the spectral region around 350 nm.The grating is to be installed in an instrument where light from the entrance slit is incident normal on the grating. If the manufacturer ...
*April 2, 2010 by Sandhya*

**Psychology 220**

# 1.55 (1 pts.) Which of the following information led Dr. Tobin to conclude that Peter was suffering from bipolar disorder? A) the fact that he reported having intense bouts of anxiety B) the fact that he had recently been married and soon after was divorced C) the fact that ...
*December 9, 2012 by G. KAY*

**Trig**

The angle of elevation to the top of a building from a point on the ground is 39 degrees. From a point 50 feet closer to the building, the angle of elevation is 48 degrees. What is the height of the building?
*February 16, 2011 by Chetan Munsell*

**trig**

A force of 50 pounds acts on an object at an angle of 45°. A second force of 75 pounds acts on the object at an angle of -30°. Find the direction and magnitude of the resultant force.
*December 14, 2011 by Cam*

**trigonometry**

please check my answers. 1.Find the area of the sector of a circle. r=11.8cm, theta-pi/7 radians I got 31.2cmsquared 2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters. I got 17.03m 3.Find the measure(in radians) of...
*January 7, 2009 by y912f*

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