Friday

December 9, 2016
Number of results: 127,625

**MATH**

Aircraft are landing and taking off on parallel runways at a busy airport. On its approach, one aircraft descends from an altitude of 1200m to an altitude of 500m in 35s. During the same time, a departing aircraft climbs from an altitude of 200 m to an altitudes of 1250m. A) ...

*January 5, 2011 by Anonymous*

**Math**

The altitude of a plane as it begins to descend is shown by the linear equation a = 22,000 – 800m, where a is the plane’s altitude, in feet, and m is minutes. What is the plane’s altitude when m = 12? ft

*December 13, 2014 by Autumn*

**Science**

How does altitude affect climate? The higher the altitude, the colder the climate will be. (MY ANSWER) The lower the altitude, the older the climate will be. The higher the altitude, the hotter the climate will be. Altitude is not related to climate.

*January 29, 2016 by LOVE*

**math**

triangle ABC has vertices A(3,4), B(4,-3) and C(-4,-1). a. draw a sketch of the triangle b. draw the altitude from vertex A c. find the slope of side BC which is =-1/4 d. find the slope of the altitude from A which is 4 e. find the equation of the line that contains this ...

*October 27, 2010 by Ted*

**math**

an altitude of triangle is 5/3rd of the length of its corresponding base if their altitude be increased by 4cm and the base is decreased by 2cm, the area of the triangles remain the same. find the base and altitude of triangle ?????

*October 7, 2012 by TUHITUHI*

**Math**

The base of a triangle is 2cm less than the altitude and the area of the angle is 60^2 cm. Calculate the altitude

*February 3, 2016 by Profound*

**math**

the length of the base of a triangle is 4 times its altitude. if the area of a triangles is 162cm2 find the altitude

*February 11, 2011 by annette*

**Calculus**

Wheat is poured on the ground at a rate of 12 ft^3/s. The pile forms a cone whose altitude is always three fourths of the radius. Find the rate at which the altitude is increasing when the altitude is 6.0 ft.

*March 10, 2012 by Candy*

**math**

a jetliner is crusing at an altitude of 31,680 ft. What is the altitude in miles? Show work by using demensional analysis.

*October 26, 2010 by Anonymous*

**math**

The base of triangle ABC is one half the altitude.The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF ? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...

*April 19, 2014 by thomas*

**math**

The base of triangle ABC is one half the altitude. The altitude of triangle DEF is one half its base. If both triangles are equal in area, what is the ratio of the altitude of triangle ABC to the altitude of triangle DEF? a. 1:4 b. 1:2 c. 1:1 d. 2:1 e. 4:1 please answer and ...

*April 24, 2014 by thomas*

**Physics**

The modern Boeing 747 passenger jet airplane cruises at a speed up to 900 km/hr, at an altitude of 11,000 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". The pressure as a function of ...

*January 27, 2013 by Francisco*

**math (geometry)**

A parallelogram has sides 8 and 12. The shorter altitude is 6. Find the length of the other altitude. -------------------------------------------------------------------------------- It says the answer is 9, but I don't know how they got that. Any help is greatly appreciated!! =D

*March 11, 2008 by Emily*

**AP Calculus**

The sum of the two bases and the altitude of a trapezoid is 16ft. a) Define the area A of the trapezoid as function of its altitude. b) Find the altitude for which the trapezoid has the largest possible are. (Optimization)

*October 31, 2010 by Anonymous*

**physics**

. The altitude of a plane as it begins to descend is shown by the linear equation a = 22,000 – 800m, where a is the plane’s altitude, in feet, and m is minutes. What is the plane’s altitude when m = 12 ft

*October 7, 2014 by Brianna Garrett *

**math (altitude)**

An airplane flying at an altitude of 31,000 feet descends at a rate of 1,200 feet per minute. If the plane descends for 15 minutes, what would its altitude be in feet?: * 13,000 23,000 18,000 21,000

*September 22, 2007 by anonymous*

**Math**

the altitude, AD, to the hypotenuse BC of right triangle ABC divides the hypotenuse into segments that are 8 and 10 cm long. find the length of the altitude.

*October 19, 2013 by anae*

**math**

two sides of a triangle are 15cm and 18 cm in length. the altitude tossed is 10cm what is the length of the altitude to the 15 cm side?

*September 25, 2016 by allie*

**Math(solid mensuration)**

The lateral edges of edge 8m of an oblique square prism is inclined at an angle of 30 degrees with the altitude. What is the altitude of the prism?...

*April 30, 2016 by Drew*

**math**

The base of triangle is 2cm less than the altitude and the area of the triangle is 60cm². calculate the altitude.

*February 3, 2016 by Ruth*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...

*October 25, 2012 by Sara*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...

*October 26, 2012 by Sara*

**Physics**

A car of mass 1100 kg starts from rest at sea level and climbs a hill of altitude 50 m. At the top of the hill the car has a speed of 25 m/s. From the top of the hill the driver turns off the engine and coasts down to an altitude of 15 m. Assume the friction and the air ...

*October 27, 2012 by Sara*

**math**

A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?

*September 5, 2013 by Jacob*

**Physics**

A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 10^3 kg, what is the new altitude it reaches? Take the mass of the Earth to be 5.97 x 10^24 kg ...

*April 2, 2014 by Dan*

**physics**

Calculate the value of g for a satellite that is orbiting in a circle at an altitude equal to 3 Earth radii. also, along the same lines, A typical shuttle altitude is 220 km. Calculate the value of g at this altitude. The the mass of the Earth = 5.98 x 10^24 kg and the radius ...

*March 3, 2011 by kelly*

**Math**

The base of tringular field is twice its altitude. If the cost of levelling the field at the rate of Rs 10per m^2 is Rs 4000,find its base and altitude.

*September 9, 2012 by Simran kaur*

**Geometry altitude**

a(-2,4) b (4,6) c (-4,-4) find the equation for the altitude from each vertex of triangle abc.

*February 14, 2011 by Skye*

**Math**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

*November 22, 2011 by Zoey*

**Math**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

*November 22, 2011 by Jake*

**math**

the rim of a canyon is at an altitude of 45m. On a hike down into the canyon, a party of hikers stop for a rest 160m below the rim. They descend another 71m. What is their new altitude?

*July 5, 2012 by paula jones*

**Physics-Gravitational Potential Energy**

A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 103 kg, what is the new altitude it reaches? Take the mass of the Earth to be 5.97 x 10^24 kg ...

*April 1, 2014 by Dan*

**Analytic geometry - finding point by intersect lin**

I have a triangle ABC. The slope of AB is -1/ab, the slope of AC is -1/ac, and the slope of BC is -1/ac. My question is, I have 3 lines: Altitude from A to BC, altitude from B to AC, and altitude from C to AB. I know their slope because it is just -1/slope. But I want to know ...

*March 5, 2013 by Knights*

**physics**

how would you calculate altitude given airspeed, rate of descent and time? I'm trying to find the change in altitude

*September 20, 2010 by polly*

**physics**

A model rocket leaves the ground, heading straight up at 47 m/s. (a) What is its maximum altitude? m What are its speed and altitude at each of the following times? (b) 1 s m/s m (c) 4 s m/s m (d) 8 s m/s m

*January 16, 2011 by Jen*

**geometry**

The altitude upon the hypotenuse of a right triangle divides the hypotnuse into segments of 3 and 12. find the length of the altitude

*February 8, 2011 by Jorge*

**Geography **

How do latitude and altitude affect the climate? My answer: The altitude affects the climate in the sense that the higher the altitude, the colder and harsher the climate will become. Latitude affecting the climate, however, depends on the equator. The closer the latitude is ...

*September 2, 2013 by Anonymous*

**life science**

At high altitude the atmospheric pressure is lower and the air is less dense than at low altitude.this means that at high altitude there is less oxygen available for gaseous exchange thus gas exchange becomes less efficient. what conclusion can be made?what will happen to the ...

*August 3, 2015 by merissa*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.35 psi, what is its altitude?

*November 14, 2013 by Anonymous*

**Alaniz**

An airplane is flying at an altitude of 4000 feet and descends at a rate of 200 ft./m determine whether the altitude is proportional to the number of minutes. Explain your reasoning?

*September 1, 2015 by Zack*

**Math**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9000 centimeters and the area is 87000...

*August 23, 2011 by Ning*

**Trig application**

I have been working on this problem but I am not sure I am doing it right. During takeoff an airplane's angle of ascent is 18 degrees and its speed is 275 feet per second. A. Find the plane's altitude after 1 minute. B. How long will it take for the plane to climb to an ...

*February 21, 2015 by Hutch*

**math.**

A band of cumulus clouds is located at 10^4 feet. A commercial jet is traveling at 38,000 feet. What is the difference between the altitude of the clouds and the altitude of the jet?

*October 8, 2014 by ruby.*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e−0.21 awhere a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 11.11 psi, what is its altitude? (Recall that 1 mi = 5,280 ft.

*November 23, 2014 by libby*

**math**

Find the area of the following plane figure. Find the altitude of a triangle whose area is 100 cm2 and whose base is 20 cm. Altitude =

*July 4, 2016 by C*

**Math Homework**

1) Given the side of a square pyramid is 6cm and the altitude is 4cm calculate the surface area. 2) Given the side of a square pyramid is 12cm and the altitude is 8cm calculate the surface area. 3) Given the side of a square pyramid is 18cm and the altitude is 12cm calculate ...

*February 6, 2007 by Student*

**calc**

2- The earth’s atmospheric pressure p is often modeled by assuming that the rate dpdhat Which p changes with the altitude above sea level is proportional to hp. Suppose that the pressure at sea level is 1013 millibars (about 14.7 pounds per square inch) and that the pressure...

*April 10, 2007 by barb*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...

*October 20, 2011 by Anonymous*

**math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...

*January 22, 2012 by Anonymous*

**Algebra Honors**

The length of the base of a triangle is 4 times its altitude. If the area the triangle is 162 cm2, find the altitude.

*April 2, 2009 by Raj*

**algebra quadratic equations**

the altitude of a triangle is 1 cm less than its base, if the area is 105 cm2. what are the lengths of the base and the altitude

*August 1, 2016 by ford*

**Geometry**

Two similar triangles have a scale factor of 3 : 5. The altitude of the larger triangle is 24 inches. What is the altitude of the smaller triangle?

*May 16, 2016 by Jessica*

**geometry**

the base of a triangle is 4dm longer than its altitude, and its area is16dm^2. Find the lengths of the base and its altitude.

*February 6, 2011 by ja*

**Geometry**

The altitude of the hypotenuse of a right triangle divides the hypotenuse into segments of lengths 14 and 8. What is the length of the altitude?

*February 21, 2012 by Myles*

**maths**

if the area of parallelogram is 192cm² and the altitude is three times the corresponding base then what is length of base and altitude

*January 17, 2016 by aziz*

**Trigonometry **

Your altitude is 40,000 feet and you detect a target at a depression angle of 6 degrees and a range of 20 miles. what is the altitude of the target? Draw a picture.

*March 11, 2012 by Diana*

**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*

**college math**

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your answer to the ...

*July 10, 2011 by joyce*

**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*

**math/geometry**

What are the surface areas of this two figures? a) a triangular pyramid with base of 5 cm, an altitude of the base of 8.7 cm and a slant height = 6.9 cm b) a square pyramid with a slant height of 5.2cm and an altitude of the triangle of 9cm.

*November 11, 2008 by katie*

**Math**

A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure? The altitude of the trapezoid is __ feet.

*April 25, 2013 by Joe*

**College Math II**

If a ball is tossed into the air from a height of 6 feet with a velocity of 32 feet per second, then its altitude at time t (in seconds) can be described by the function A(t) = - 16t^2 + 32t + 6. Find the altitude of the ball at 2 seconds. I am having problems understanding ...

*November 21, 2009 by Lori*

**physics**

In late 2001, steve Fossett tried to fly a balloon nonstop around the world . why on his attempted circumnavigation of the globe did Steve attempted to travel at an altitude of approximately 10000 m? That is a typical stratosphere flight altitude, where the pilot can usually ...

*June 16, 2007 by Emma*

**Math (Proportions)**

3. The ratio of the altitude of a triangle to the length of its base is 5:12. Calculate the altitude if the length of the base is 42mm. 17.5 length/base= 5/12=x/42= 17.5

*October 18, 2013 by Jerald*

**math (algebra)**

Water boils at 212 degrees F at sea level (altitude 0 ft), 204.6 degrees F at 40000 ft, 197.2 deg. F at 8000 ft, and 189.8 deg. F at 12,000 ft. Find a good model relating the boiling temperature t of water to the altitude a.Is the model linear or quadratic?

*May 3, 2009 by Layne*

**help physics**

A satellite, LangSat, moves in circular orbit around the Earth at a speed of 4.95kms-1. (i) What is the altitude of the satellite (ii) Determine the period of the satellite’s orbit (iii) What is the value of the gravity, g, at the satellite. (iv) If another satellite, ...

*September 2, 2013 by kent*

**physics**

A child loses his balloon, which rises slowly into the sky. a) If the balloon is 21.5 cm in diameter when the child loses it, what is its diameter at an altitude of 1150 m? Assume that the balloon is very flexible and so surface tension can be neglected. b) And what is the ...

*March 21, 2012 by maria*

**physics**

The largest ballon ever flown had a volume of 53 million cubic feet. The thickness of the fabric is only 0.013mm. The balloon would reach an altitude of 150,000 ft. ( 46 km). The atmospheric pressure at that altitude is about 2*10^-3kg/m^3. The pressure of the helium was the ...

*January 1, 2014 by alice*

**Phizzics....**

The Canadian microsatellite MOST (Microvariability and Oscillations of Stars) has a mass of just 52 kg. It travels in an almost circular orbit at an average altitude of 820 km above Earth’s surface. a) Calculate the gravitational force between Earth and the MOST satellite at...

*May 15, 2012 by dreamygirl*

**math**

Atmospheric pressure V decreases as altitude h increases. At a temperature of the pressure is 101.1kilopascals kPa at sea level, 86.4 kPa at h = 1 km, and 77.1 kPa at h = 2 km. Use a linear approximation to estimate the atmospheric pressure at an altitude of 3 km. Please round...

*March 30, 2007 by Tina*

**11th grade**

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that below an altitude...

*December 16, 2010 by Vanessa*

**algebra 2**

A skydiver jumps from an airplane at an altitude of 2,500 ft. He falls under the force of gravity until he opens his parachute at an altitude of 1,000 ft. Approximately how long does the jumper fall before he opens his chute?

*October 27, 2014 by Anonymous*

**Math**

The area of trapezoid is h( b1+b2)/5, where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the lenghth, in inches, of its other base? Please ...

*April 22, 2011 by Nena*

**Geometry **

The base of a right prism is a rhombus with a side of 10 cm and an altitude of 9.6 cm. Find the diagonals of the prism if the altitude of the prism is 12 cm.

*June 24, 2015 by Mark*

**chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?

*April 12, 2010 by Laura*

**chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?

*April 12, 2010 by Laura*

**Chemistry**

At an altitude of 50.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?

*April 13, 2010 by Anonymous*

**physics**

A spacecraft is in circular Earth orbit at 5400km altitude. By how much will its altitude decrease if it moves to a new circular orbit where its orbital speed is 20% higher?

*November 10, 2013 by Judith*

**Geometry**

The altitude to the hypotenuse of a right triangle divides the hypotenuse into segments 6 inch and 10 inch long, Find the length h of the altitude.

*January 31, 2016 by Kala'e*

**math**

The area of trapezoid is h( b1+b2)/5,where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the length, in inches, of its other base?

*April 20, 2011 by Please help*

**math**

The area of trapezoid is h( b1+b2)/5,where h is the altitude, and b1 and b2 are the lenghts of the parallel bases. If trapezoid has an altitude of 5 inches, an area of 55 square inches , and one base 12 inches long, what is the length, in inches, of its other base?

*April 20, 2011 by Please help*

**algebra**

The length of an altitude of a triangle is 1/3 the length of the side to which it is drawn. If the area is 6 square cm., then what is the length of the altitude?

*January 6, 2011 by Tammy*

**chemistry**

A high-altitude balloon contains 97.5 L of helium gas at 95.8 kPa. What is the volume when the balloon rises to an altitude where the pressure is only 21.5 kPa? (Assume that the temperature remains constant.)

*March 2, 2011 by lisa*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

*November 21, 2011 by Ashley*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

*November 22, 2011 by Jake*

**Algebra II**

The area of a triangle varies jointly as its base and altitude. By what percent will the area change if the base is increased by 15% and the altitude decreased by 25%?

*November 22, 2011 by Jake*

**physics**

A 981-kg satellite orbits the Earth at a constant altitude of 103-km. How much energy must be added to the system to move the satellite into a circular orbit with altitude 199 km? I need answer in MJ please tell me what formula

*March 11, 2011 by Rachel*

**Math-please help! **

the area of the base of a triangular prisim A is 15 square inches and its altitude is 8 inches. Rectangular prism B has a square base that measures 2 inches on each side. If prisim A and prisim B have the same volumes, what must be the altitude of prisim b?

*April 12, 2010 by Lena*

**Math**

The temperature deceased due to increase in altitude at the rate of 8 degrees Celsius per 1500 m the temperature at 4500 m above the ground level is 4 degrees Celsius find the temperature at ground level and at an altitude of 9000 m

*July 11, 2016 by Anonymous*

**CAL**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...

*July 9, 2011 by Laura Le*

**CAL**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 4000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 11500 centimeters and the area is ...

*July 10, 2011 by lan*

**Calculus Please help!**

The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 87000...

*February 28, 2014 by ALI*

**physics...**

A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (a) Determine the satellite's altitude above the surface of the Earth. i'm using the equation Gm/(r+h)=9.8 where h=altitude and i keep coming up with the wrong answer.

*December 8, 2010 by kaitlyn*

**physics**

A rocket rises vertically, from rest, with an acceleration of 3.2 m/s2 until it runs out of fuel at an altitude of 730m . After this point, its acceleration is that of gravity, downward.whats the maximum altitude does the rocket reach?

*September 10, 2014 by Megan *

**Math**

A plane was flying at an altitude of 30,000 feet when it began the descent toward the airport. The airplane descends at a rate of 850 feet per minute. a. What is the function rule that describes this situation? b. What is the altitude of the plane after it has descended for 8 ...

*January 12, 2014 by Shakira*

**Maths (quadratic equation) need help**

The altitude of a triangle is 3 less than twice its base.The area of the triangle is 10m^2. Find the altitude and base of the triangle.

*May 31, 2016 by Sama*

**Math**

The air temperature decreases by about 1 degree Fahrenheit for each 300 feet of altitude. a) Find a function T(x) for the temperature at an altitude of x feet if the sea-level temperature is 45∘F. (b) Find T(1000). [Round to two decimals] I considered two sets of points...

*November 27, 2015 by Rosie*

**calculus**

The altitude of a triangle is increasing at a rate of 3.000 centimeters/minute while the area of the triangle is increasing at a rate of 2.500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 9.000 centimeters and the area is 93...

*May 14, 2012 by remy*

**Calculus**

The rate of change R, in kilometers per hour, of the altitude of a hot air balloon is given by R(t)=t^3-4t^2+6 for time on the interval [0,4], where t is measured in hours. Assume the balloon is on ground level. What is the maximum altitude of the balloon during the interval [...

*January 10, 2011 by Joe Schmo*

**trigonometry**

A helicopter hovers at an altitude that is 2000 feet above a mountain peak of altitude 5280 feet. A second taller peak, is viewed from both the mountain top and the helicopter. From the helicopter, the angle of depression is 43° 55'. From the mountain top, the angle of ...

*March 3, 2016 by ymme*