# How to figure out the temperature of a lake using x for the feet or the Depth and for the degrees Celsius use (3900x+1000)/(3x^2+100) with the answer of the degrees celsius being 8.44 looking like 8.44=(3900x+1000)/(3x^2+100) i need the depth

34,877 questions, page 191

A man of mass 80 kg and density 970 kg/m3 stands in a shallow pool with 31% of the volume of his body below water. Calculate the normal force the bottom of the pool exerts on his feet. (Take the positive direction to be up. Indicate the direction with the

asked by HELP!!!! on April 16, 2011
2. ## Math

Amanda wants to shorten the wheelchair ramp at her front door. The current ramp is 13 feet along the horizontal and the step is 9 inches high. If she doubles the measure of the angle that the ramp makes with the walkway, how long will the new ramp be to

asked by Anonymous on May 20, 2015
3. ## Physics

A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

asked by Summer on May 21, 2014
4. ## PHysics

The tip of a helicoptor rotor blade can reach speeds of roughly 300 mph (130 m/s). It takes about 30 seconds to get them up to speed and they have a typical radius of 20 feet (6 m). What is the average angular acceleration of the rotor blades as they get

asked by Paige on April 6, 2011
5. ## College Algebra

A rancher needs to build four identical pens for his animals as shown in the diagram below. He has 240 feet of fencing. He does not need to put the fence along the barn. Find the length and width that would maximize the area of the pens. What is the

asked by Cruz on April 28, 2014
6. ## Math/physics

Known factors-weight 105 g---speed at start 60 mph---distance traveled 70 yds. Questions ,what is the rate of decelleration?, At what yard marker does it decellate to 35 mph For each 5 feet higher from start - how much farther does it travel. Thank you for

asked by Tom on July 28, 2012
7. ## Math: Trigonometry/Geometry

Carlos is planning to build a grain bin with a radius of 15 ft. he reads that the recommended slant of the roof is 25 degrees. He wants the roof to over hang the edge of the bin by 1ft. What should the length of X be? Give answer in Feet and

asked by Robbie F on March 14, 2018
8. ## Geometry

If a rectangular lot measures 120 ft. x 80 ft., and 10 foot set backs are required from each lot line, how much area is left? If a kennel for 50 dogs requires 12,500 square feet, how many dogs can be accommodated in the small rectangle?

asked by Ivan on January 18, 2011
9. ## Physcis

A bird lands on a bare copper wire carrying a current of 27 A. The wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) Find the difference in potential between the bird's feet, assuming they are separated by a distance of 7.2 cm.

asked by Summer on May 21, 2014
10. ## Algebra

The volume in cubic feet of a box can be expressed as (x)=x^3-6x^2=8x￼ , or as the product of three linear factors with integer coefficients. The width of the box is x-2.  Factor the polynomial to find linear expressions for the height and the

asked by Ciaria on March 17, 2015
11. ## Pre-aljebra

a rectangular dog pen is to be constructed so that one side is against an existing stone wall and the other three sides are to be fenced. of 500 feet of fence is to be used, determine the dimensions and area of the pen with maximum area. I have no idea how

asked by Alex on February 12, 2017
12. ## college math

a rectangular dog pen is to be constructed so that one side is against an existing stone wall and the other three sides are to be fenced. of 500 feet of fence is to be used, determine the dimensions and area of the pen with maximum area. I have no idea how

asked by Jennifer on February 12, 2017
13. ## algebra

miquel is designing shiooing boxes that are rectangular prisms the shape of one box with height h in feet has a volume defined by the function v(h)=h(h-5)(h-6) graph the function what is the maximum volume for the domian 0

asked by lee on November 12, 2012
14. ## geometry

Sam went to the park and saw a work crew putting in a square garden. She found a tape measure that was stretched between opposite corners with a measurement of 171.1 feet and decided to find the area. What is the area of the square in yards?

asked by beck on May 19, 2013
15. ## Physics

You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 106 m/s. How much time does it take for the impulse, which travels a distance of 1.80 m, to reach your brain?

asked by Dwight on September 12, 2011
16. ## Calculus

Starting at midnight, a 10 foot radius circular pond freezes inward from the outer edge at a rate of 4 inches per hour. How fast is the open area shrinking at when the radius is 9 feet? (Note: if I'd said "at 3am" instead of "when radius is 9 ft", this

asked by Lela Mitevska on March 6, 2016
17. ## Physics

If you are driving at 65mph along a straight road and you look to the side for 2 seconds, how far do you travel during this inattentive period? (Give the answer in meters and in feet) Would i use d= d_0 + vt to solve this problem or would I use another

asked by Tammy on September 11, 2007
18. ## Physics

A Goodyear blimp typically contains 4770 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. The temperature of the helium is 274 K. What is the mass (in kg) of the helium in the blimp? A Goodyear blimp typically contains 4770 m3 of helium (He) at

asked by maysam on December 1, 2006
19. ## english

Paraphasing practice In 1857, a British expedition led by Richard Burton and John Speke set out to find the great lakes shown on Ptolemy's map. After reaching Lake Tanganyika, the two men split up because Burton was ill.

asked by Tamara on May 4, 2014
20. ## math

If the area of the parallelogram ABCD is 4 square feet and OP"=5OP, what is the area of the parallelogram A"B"C"D"?

asked by Anonymous on August 20, 2010
21. ## Math

A zoo measured the height, in feet, of 9 giraffes. 18, 16, 22, 14, 17, 19, 15, 19, 22 What is the median height of the giraffes? 16 ft 17 ft 18 ft 19 ft I think it is 17 ft.

asked by Pizza on April 10, 2017
22. ## Math

The perimeter of a rectangular garden is (3x + 12) feet. What is the perimeter of the garden in factored form?

asked by Hannah on April 8, 2015
23. ## math

the bottom of a 25 foot ladder is placed 7 feet from a wall. how far up the wall will the ladder reach?

asked by potato on May 29, 2012
24. ## math

A farmer is planting a row of corn. Each plant is 3 feet apart. If he is planting 23 how far apart is the first and last plant?

asked by Anonymous on March 12, 2012
25. ## Math

If a 6-foot man has a shadow of 9 feet, how long a shadow would a 20-foot pole have?

asked by Raquel on January 27, 2018
26. ## Chelsea

on a farm there are rabbits and chickens. Altogether, there are 20 heads and 50 feet. How many rabbits and chickens are there?

asked by Math on September 16, 2012
27. ## math

A square kitchen has an area of 100 square feet. What is the kitchen's perimeter?

asked by cindy on February 15, 2012
28. ## math

If the area of the parallelogram ABCD is 4 square feet and 2OPOPŒ=, what is the area of the parallelogram?

asked by Anonymous on August 20, 2010
29. ## math

joe uses 3 5/6 feet of ribbon to wrap one package. how much ribbon does he use to wrap 12 packages ?

asked by joe on November 5, 2013
30. ## Math

amy said there are three cubic feet in a cubic yard explain why amy is incorrect

asked by Cindy on March 26, 2015
31. ## math

If the area of the parallelogram ABCD is 4 square feet and OP"=5OP, what is the area of the parallelogram A"B"C"D"?

asked by Anonymous on August 21, 2010
32. ## math

Ramona cut 9 feet off a ribbon that was 7 yards long. How long is the ribbon now?

asked by Anonymous on May 29, 2011
33. ## Algebra

The formula for the volume of a cube is V=s³. What is the volume of a cube with a side length,s,of 3 feet?

asked by NAIA Owens on March 6, 2016
34. ## math

If the ratio of the rise to run on the pitch of a roof is 7/10 and the run is 30 feet, what is the rise?

asked by Cortney on August 22, 2015
35. ## math

after 3/4 of a minute a sloth has move just 3/8 of a foot. what is the sloth,s speed in feet per minute?

asked by aldair on October 30, 2014
36. ## pre-algebra

The length of a kitchen is 1 1/4 inches. The actual length is 20 feet. What is the scale of the kitchen

asked by kayla on December 3, 2014
37. ## Math

A family room is 24 feet long and 18 ft wide. What is the area of the family room?

asked by Anonymous Student on March 1, 2016
38. ## Math

A board is 6 3/4 feet long.If 2/3 of the board is cut off, what is the length of the piece that is cut off.

asked by Nicole on February 5, 2014
39. ## math

write a problem with lengths in feet using the numbers 29 and 56. write the answer to your problem.

asked by Jim on May 29, 2014
40. ## English

Here are the first sentences I turned into indirect speech. Can you please have a look at them? 1)A knight called Sir Pellinore warned him not to go past that fountain because he should (?) have fought with him first.Merlin told (instructed, ordered)

asked by Henry2 on September 8, 2011
41. ## thermodynamics and kinetics

One mole of an ideal gas at 25C and 1 bar is allowed to expand adiabatically against a constant external pressure of 1.00 bar from 1.00 dm^3 to 10.00 dm^3. Calculate the final temperature, q, w, delta_U and delta_H.

asked by Dorota on October 12, 2012
42. ## Chemistry

A certain substance has a heat of vaporization of 62.08 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 361 K? I've gotten it to the point of: ln(4.50)=7466.47423176378616 K (1/361 - 1/T2) Solving for T2 but I

asked by Anonymous on December 7, 2016
43. ## Physics

a 0.15 kg sample of Alloy is heated 540°C. it is then quickly placed in 400 g of H2O at 10°C which is contain in a 200 g aluminum cup. the final temperature of the mixture is 20. 5 °C. calculate the specific heat of alloy.

asked by Gelo on November 25, 2015
44. ## Chemistry

If 5.300 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542

asked by Jason on October 6, 2013
45. ## Science

Suppose you set a glass of water in direct sunlight for 2 h and measure its temperature every 10 min. What type of graph would you use to display your data? What would the dependent variable be? What would the independent variable be?

asked by Jennifer on February 10, 2008
46. ## chemistry

Calculate the final temperature that results from mixing 245 grams of cobalt, specific heat 0.446 J/g0C, at 1420C with 106 grams of water at 24.80C.

asked by cao on November 14, 2016
47. ## physics

find the thermal stress in a 18 ft long steel beam that embedded in concrete. If the temperature rises by 40 degrees and the beam move a distance of .04 inches on each side. E=30*10^6 psi

asked by stacey graham on April 16, 2010
48. ## Chemistry

"Under constant conditions of P(pressure) and T(temperature) (and R [gas constant]), write an equation showing d(density) written as a function of M(molecular mass)." I don't understand this, really! Please help! Thanks in advance!

asked by TAG on January 13, 2008
49. ## Math

suppose you put one bacterium on a petri plate containing a suitable medium at a favorable temperature. If after 6 hours you found there to be 40 bacterium. What would be its exact double time to the nearest minute?

asked by Anonymous on April 28, 2013
50. ## science

best temperature to grow lettuce from seeds. (plan) independent variable:something i change dependant variable:what to measure fair test- things i should keep the same. thanks if anyone reply...need a answer quickly.=]

asked by emily on November 2, 2008
51. ## chemistry

What will be the final temperature of 650 g of water initially at 5.5°C if it is heated by burning 7.5 g of carbon to carbon dioxide. The molar heat of reaction is -393.5 kJ/mol. I do not understand how to do this question

asked by Wendy on February 16, 2015
52. ## physics

A glass window pane has an area of 3.50 m2 and a thickness of 0.600 cm. If the temperature difference between its surfaces is 27.0°C, what is the rate of energy transfer by conduction through the window? I tried using the formula P=ka[(th-Tc)/l] my answer

asked by tom on October 19, 2008
53. ## Science

How many molecules of sulphuric acid are needed to neutralize 5 ml of sodium carbonate and 5 volumes of tetra ox's sulphate(VI)acid when calcium is heated at a temperature of 20 degrees using nickel as a catalyst?

asked by Francisca on March 27, 2018
54. ## chemistry

mass= 3.8721g temperature= 102 degrees Celsius volume= 156ml atmospheric pressure= 755.0 mm Hg calculate the molar mass using the ideal gas law

asked by VICKY on November 23, 2010
55. ## chemistry

Calculate the final temperature that results from mixing 245 grams of cobalt, specific heat 0.446 J/g0C, at 1420C with 106 grams of water at 24.80C.

asked by cao on November 14, 2016
56. ## physics

How do you know that a sealed calorimeter is a closed system? because temperature is consurved because the masses of the sample and water are equal because thermal energy is not transferred to the environment because work is done on the test sample Please

asked by kevin on April 11, 2012
57. ## chemistry

An unknown quantity of gas at a pressure of 121.59 kPa, a volume of 31 L, and a temperature of 360 K contains how many moles of gas? Round to the nearest hundredth. Don't forget the units.

asked by janay on September 6, 2010
58. ## What is the Final Temperature?

Four ice cubes at exactly 0 degrees C having a total mass of 53.0 g are combined with 120 g of water at 77 degrees C in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?

asked by Amy on January 6, 2013
59. ## general chemistry

2C6H6(l)+15O2(g)-> 12CO2(g)+6H20(l)+6542 kj If 6.200 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water?

asked by fer on October 14, 2016
60. ## chemistry

If the rocket engine contains 1500.0 grams of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540°C and a pressure of 1.2atm?

asked by Big Trav on July 24, 2012
61. ## Physics

The tube of a mercury thermometer has an inside diameter of 0.130 mm. The bulb has a volume of 0.270 cm^3. How far will the thread of mercury move when the temperature changes from 13.5 ∘C to 32.5 ∘C? Take into account expansion of the Pyrex glass.

asked by Marthy on January 21, 2018
62. ## chemistry

A piece of metal of mass 18 g at 104 ◦C is placed in a calorimeter containing 47.4 g of water at 22◦C. The final temperature of the mixture is 40.8 ◦C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the

asked by kika on April 7, 2015
63. ## Chemistry, Vapor Pressure

Select the pair of substances in which the one with the higher vapor pressure at a given temperature is listed first. 1. C7H16, C5H12 2. CCl4, CBr4 3. H2O, H2S 4. CH3CH2OH, CH3-O-CH3 5. Xe, Kr

asked by Ryan on December 11, 2014
64. ## chemistry

Calculate the enthalpy of atomization per unit volume for Rb. Express your answer in kJ/m3. Determine the volume (in mL) occupied at room temperature by 3.5e22 mercury (Hg) atoms in the liquid state.

asked by schoolgirl on March 23, 2013
65. ## physics

calculate the specific heat capacity of the materials for which the heat supply, mass, and temperature rises are given below: i)25200J, 0.3Kg ii)8000J, 500g, from 20'C to 60'C iii)9450J, 150g, from 15'C to 45'C

asked by fiyin on January 10, 2017
66. ## Chemistry

A piece of metal of mass 18 g at 107◦C is placed in a calorimeter containing 56.5 g of water at 25◦C. The ﬁnal temperature of the mixture is 56.3◦C. What is the speciﬁc heat capacity of the metal? Assume that there is no energy lost to the

asked by Ali on May 5, 2015
67. ## Chem. Find specific heat capacity.

A piece of lead with a mass of 27.3 g was heated to 98.90oC and then dropped into 15,0 g of water at 22.50oC. The final temperature was 26.32oC. Calculate the specific heat capacity of lead from these data. THANK YOU FOR ANY HELP!

asked by Sarah on November 30, 2008
68. ## Science

arrange the following aqueous solutionsin order of increasing freezing points(lowest to highest temperature): 0/10m glucose, 0.10m BaCl2, 0.20mNaCl, and 0.20m Na2SO4.

asked by Jill on September 11, 2013
69. ## Physics

What is the gibbs free energy for the reaction a)temperature b)800 degrees celsius c)comment on whether the reactions are spontaneous or not (CHEMICAL REACTION) deltaH = -100kJ delta S= -200 J/K

asked by Sarah on March 18, 2013
70. ## chemistry

A weather ballon with a 2 meter diameter at ambient temperature holds 525 grams of helium. what type of electric probe could be used to determine the pressure inside the ballon?

asked by sofia on March 25, 2009
71. ## science

A piece of metal of mass 15 g at 119 ◦C is placed in a calorimeter containing 48.8 g of water at 23◦C. The final temperature of the mixture is 58.9◦C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the

asked by anonymous on June 5, 2018
72. ## Chemistry

Assume tat you have a sample of a gas in a cylinder with a movable piston at constant pressure. Determine the volume of the gas if the absolute temperature is decreased by twenty-five percent.

asked by Devin Boutte on August 28, 2011
73. ## Thermochemistry

A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 167 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 degrees C. What is the enthalpy?

asked by Michelle on October 17, 2010
74. ## AP Calculus - High School

The Temperature T of food put in a freezer is T = (700) / t^2+4t+10 where t is the time in hours. Find the rate of change of T with respect to t at each of the following times. a. t=1 b. t=3 c. t=5 d. t=10 ** i'll be able to do the others on my own if you

asked by David. on October 18, 2009
75. ## PHYSICS!!

A 618 g sample of water at 73◦C is mixed with 478 g of water at 34◦C. What is the final temperature of the mix- ture? Assume no heat loss to the surround- ings. Answer in units of ◦C.

asked by Perla on April 11, 2010
76. ## Chemistry

Four ice cubes at exactly 0 Celsius having a total mass of 55.0g are combined with 120g of water at 77 Celsius in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?

asked by Ben on September 10, 2012
77. ## General Chemistry : for Nursing

Im Having a really Hard time with this problem :( ---> A sample containing 5.60g O2 gas has a volume of 31.0L . Pressure and temperature remain constant. 1 .) Oxygen is released until the volume is 8.00L . How many moles of O2 are removed?

asked by Shayla on November 11, 2013
78. ## Science

Which best describes the similarities among elements included in the same column of the periodic table? A. They have the same state at room temperature. B. They have the same number of protons. C. They have the same number of electrons. D. They have

asked by Anonymous on March 13, 2014
79. ## Chemistry

Why did we have to use the same thermometer for finding, the freezing point of both, solvent and solution? If your thermometer was not calibrated (reading 0.05 degrees Celsius below the correct temperature), how would this effect your measured value of

asked by G on March 14, 2011
80. ## physics

find the thermal stress in a 18 ft long steel beam that embedded in concrete. If the temperature rises by 40 degrees and the beam move a distance of .04 inches on each side. E=30*10^6 psi

asked by stacey graham on April 17, 2010
81. ## Homework

By forming tough,inactive cysts,Giardia... A.Survives in unfavorable conditions B.Gets energy from the sun C.Maintains a constant temperature D.Responds to stimuli,sun as chlorine

asked by Hanna on March 25, 2015
82. ## chemistry112

The partial water vapor pressure over the soulution of glucose (C6H12O6) in water is 715 torr at 100 degrees celsius. Find freezing temperature of this solution.

asked by Dominique on September 7, 2011
83. ## physics

At a picnic, a Styrofoam cup contains lemonade and ice at 0 degree C. The thickness of the cup is 2.0*10^-3m, and the area is 0.016 m^2. The temperature at the outside surface of the cup is 35 degree C. The latent heat of fusion for ice is 3.35*10^5 J/kg.

asked by Lydia on February 21, 2008
84. ## Science

1. What term refers to an energy transfer that causes a change in tempeture? Assume that you have just taken a pan of cooies out of the oven and set them on he counter to cool. 2. What term refers to the aveage kinetic energy of the particles of one of the

asked by honorsclass on January 11, 2009
85. ## math

9. The polynomial -x^3 -x^2 + 12x represents the volume of a rectangular aquatic tank in cubic feet. The length of the tank is (x + 4). a. How many linear factors should you look for? b. What are the dimensions of the tank? c. Find the value of x that will

asked by anonymous on September 2, 2018
86. ## math

A mulch layer 2 inches thick is to be spread over a bed of landscape plants. If the bed measures 8ft x 20ft, how many bags of mulch must you buy? Each bag contains 3 cubic feet of mulch.

asked by Remmy on March 30, 2012
87. ## math

Standing on the top of a building, Eric spots his friend's car at an angle of depression of 35°. The car is 360 feet from the base of the building. How tall is the building to the nearest hundredth of a foot?

asked by Anonymous on June 12, 2013
88. ## math

a rectangular pen is to be constructed alongside a barn using 120 feet of fencing. the barn will be used for one side of the pen. What should the dimensions of the pen be to maximize its area. ***Can not use calculus. This is a 9th grade question

asked by craig on September 28, 2011
89. ## plane and spherical trigonometry

a farmer has a triangular garden with two sides at right angles and the third side measuring 380 (feet long.)Find the perimeter of the garden if the angle between the shaded side and the longest side is 52(degrees)

asked by mhonic on July 8, 2013
90. ## Math

A landscaper is designing a garden with hedges through which a straight path will lead from the exterior of the garden to the interior. If the polar coordinates of the endpoints of the path are (20, 90°) and (10, 150°), where r is measured in feet, what

asked by Andrew on September 6, 2011
91. ## physics

Surprisingly, very few athletes can jump more than 2.6 ft (0.8 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.6 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

asked by Hannah on September 30, 2010
92. ## physics

Surprisingly, very few athletes can jump more than 2.0 ft (0.62 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.0 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

asked by claire on March 1, 2011
93. ## Physics

urprisingly, very few athletes can jump more than 2.2 ft (0.66 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.2 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

asked by John on February 1, 2012
94. ## Algebra II

From the top of a mountain 150 feet high, Jessie stands at the safety rail on the edge and looks below. The angle of elevation from his bike on the ground to Jessie is 38 degrees, how far is Jessie from his bike.Please help me to set this up Thank you

asked by Joseph on January 7, 2011
95. ## math

María plans to enclose a rectangular area of her yard using the 16-foot side of her storage shed as one side of the enclosure, as shown above. If she uses 64 feet of fencing to complete the enclosure, what will be the length, x, of the enclosure?

asked by maria on May 28, 2012
96. ## math

While sailing, Donna sees a lighthouse and calculates that the angle of elevation to the lighthouse is 3d, as shown in the accompanying diagram. When she sails her boat 700 feet closer to the lighthouse, she finds that the angle

asked by Anonymous on January 14, 2013
97. ## chemistry

ohh im sorry i also have another problem i don't understand. "A rectangular solid measures 1.0 m by 5.6 cm by 2.1 dm. Express its volume in cubic meters, liters, cubic inches, and cubic feet." i don't even know what dm means ! Someoneee please help me!

asked by Jecce on July 21, 2008
98. ## Math

An aquarium tank is built as a cylinder with a radius of 10 ft and a height of 12 feet. If the water weighs 62.43 lb per cubic foot, what is the weight of the water in the aquarium when it is full of water? Use 3.14 for pi and round to the nearest pound.

asked by Daja on March 17, 2019
99. ## MATH help again!

Average height of a species of tree (in feet) after a certain number of years Years Height 1 2.1 2 3.2 3 6.8 4 7.3 5 11.2 6 12.6 7 13.4 8 15.9 About how tall do you expect one of these trees to be after 22 years? a. 22.31 ft b. 35.2 ft c. 44.25 ft d. 46.2

asked by that emo girl! on January 31, 2018
100. ## algebra1

From the top of a lighthouse 210 feet high, the angle of depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level. please some sugesstions.

asked by nena on April 23, 2011