McKenna Louise
Most popular questions and responses by McKenna Louise
Math
Lighthouse B is 7 miles west sof lighthouse A. A boat leaves A and sails 15 miles. At this time, it is sighted from B. If the bearing of the boat from B is N62degE, how far from B is the boat?
asked on February 17, 2014 
Math  Trig
An observer on the ground at point A watches a rocket ascend. The observer is 120 feet from the launch point B. As the rocket rises, the distance d from the observer to the rocket increases. a. Express the measure of angle A in terms of d. b. Find the
asked on December 14, 2013 
Math  Trig
1. Given that points S and R on opposite sides of a lake, triangle SRT is formed. To find the distance RS across the lake, a surveyor lays off RT = 53.1 m, with angle T = 32deg 10' and anagle S = 57deg 50'. Find length RS.
asked on November 27, 2013 
MathAlgebra
What is the measure of the side of a cube if the volume is 27000cm^3?
asked on October 7, 2013 
Math  Trig
From the foot of a building I have to look upwards at an angle of 22degrees to sight the top of a tree. From the top of a building, 150 meters above ground level, I have to look down at an angle of depression of 50degrees to look at the top of the tree. a.
asked on December 14, 2013 
Math  Trig
1. Find the altitude of an isocles triangle having base 184.2 cm if the angle opposite the base is 68deg 44' 2. A 13.5m fire truck ladder is leaning against a wall. Find the distance d the ladder goes up the wall (above the top of the fire truck) if the
asked on November 27, 2013 
Chem
What gas law explains why hot water diffused the food coloring faster than the cold water?
asked on February 9, 2014 
Math
Ayie is 7 years older than Luis. Next year, she will be one year more than twice as old as he will be. How old is she now?
asked on January 20, 2014 
MathAlgebra
Meg has a solution that is 40% alcohol and another solution that is 60% alcohol. If Meg wants 12 gal of a solution that is 45% alcohol, how much of the two solutions must be mixed?
asked on February 4, 2014 
Math
Ten years ago a man was three times as old as his son. In twelve more years, the son is threefifths as old as his father. What were their ages 5 years ago?
asked on January 25, 2014 
Math
Points M and N are separated by an obstacle. In order to find the distance between them, a third point P is slected which is 120 yards from M and 150 yeards from N. The angle MPN is measured to be 80deg10'. Find the distance from M to N.
asked on February 17, 2014 
Trig
Prove the following: 1/(tanØ  secØ ) + 1/(tanØ + secØ) = 2tanØ (1  sinØ)/(1 + sinØ) = sec^2Ø  2secØtanØ + tan^2Ø
asked on February 28, 2014 
Math
Martina and Carl are part of a team that is studying weather patterns. The team is about to launch a weather balloon to collect data. Martina's rope is 7.8 m long and makes an angle of 36.0 deg with the ground. Carl's rope is 5.9 m long. Assuming that
asked on February 5, 2014 
MathAlgebra
DMF Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10000lbs of a mixture that is 25% protein?
asked on February 4, 2014 
Math  Algebra
If a man wewighs 41 newtons (N) on the surface of the earth while he weighs 81.5N on the surface of the moon, approximately how much lighter is he on the moon? What would be his weight on the surface of the earth if he weighs 90 N on the surface of the
asked on November 11, 2013 
MathAlgebra
A cylindrical tank could hold 100.48m^3 of water. If the height of the tank is 2m, what is the radius of its base?
asked on October 7, 2013 
Math
If an observer stands at a certain point in the same horizontal plane as the base of a radio tower. the angle of elevation of the top of the tower is 13deg 15'. If the observer moves 156.25 feet towards the tower, the angle of elevation is 18deg 10'. Find
asked on February 17, 2014 
Math  Trig
What familiar formula can you obtain when you use the third form of the Law of Cosines c^2 = a^2 + b^2  2ab cos C and you let C = 90deg? What is the relationship between the Law of Cosines and this formula?
asked on February 6, 2014 
MathTrig
1. To avoid a steep descent, an airplane flying at 10 000 m starts its descent 60km away from the airport. For the angle of descent to be constant, at what angle should the plane descend? 2. A flagpole that is 20m high casts a shadow that is 18m long. What
asked on December 5, 2013 
MathAlgebra
1. The length of a rectangle with a constant area varies inversely as its width. The length of this rectangle is 8in when its width is 3in. Find the length when the width is 4in. 2. The number of people working on a certain job varies inversely as the
asked on November 24, 2013 
MathAlgebra
1. The force (in Newtons) applied to an object varies jointly as its mass and acceleration. How much force is needed to accelerate a 25 kg object by 3 m/s^2? 2. The potential energy of an object varies jointly as its mass and height from the ground. If the
asked on November 13, 2013 
MathAlgebra
A car takes 3 hours to travel a distance of 240 km with a speed of 80 km/h while a motorbike can cover the same distance in 4 hours if its travels at a speed of 60 km/h. Explain why the speed and the time it takes for the vehicles to travel a certain
asked on November 13, 2013 
MathAlgebra
The pressure of a gas varies directly as its temperature. IF the pressure of a gas is 200 pounds per square inch (lb/in^2) at a temperature of 65.5 degrees C, what is the pressure of the gas when the temperature is 250 degrees F?
asked on November 11, 2013 
MathAlgebra
If Noah made skid marks of 350 ft long after a car accident, was he overspeeding before the event?
asked on October 9, 2013 
Trig
Verify the given equations: ____1______ + ____1_______ = 2 tanθ tanθ – secθ tanθ + secθ 1 – sinθ = sec2θ – 2 secθ tan θ + tan2θ 1 + sinθ
asked on February 28, 2014 
MathAlgebra
1. Finf the width of a rectangle whose area is 36 sq in. And length is 9in. 2. The attraction F of any two masses m1 and m2 foe each other varies directly as the oroduct of the masses and inversely as the square of the distance d between these teo masses.
asked on November 24, 2013 
MathAlgebra
Mrs. Fine had a car accident. According to the police investigation, her car make skid marks which were 42 ft in length. What was the speed of the car of Mrs. Fine at the time of the accident? Did she manage to follow the speed limit?
asked on October 22, 2013 
Math  Trig
Use the law of cosines to show that the measure of each angle of an equilateral triangle is 60deg. Explain your reasoning.
asked on February 6, 2014 
Math
1. ABC Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10 000lbs of a mixture that is 25% protein? 2. Meg has a solution
asked on January 26, 2014 
Algebra
1. The sum of the ages of James and Remy 5 years ago was 44. Twentytwo years from now, James' age will be 52 less than twice3 Remy's age then. Find their present ages. 2. Two numbers have a sum of 41. Their difference is 5. What are the numbers? 3. The
asked on January 4, 2014 
Math  Trig
1. When you look down from the top of a building at an angle of 63degrees, you will see a man reading a newspaper. If the building is 50m high, how far is the man from the building? 2. A plane takes off at an angle of 15deg20'. How high will it have risen
asked on December 5, 2013 
Math  Trig
1. From a point 15m from the base of a tree, the angle of elevation of the top of the tree is 46.48degrees. Approximate the height of the tree. 2. From a point 17.2m from the base of a building, the angle of elevation of the top of the building is
asked on December 4, 2013 
MathAlgebra
If a varies inversely as b, and b is increased by 50%, what is the percentage of change in a?
asked on November 27, 2013 
MathAlgebra
1. The surface area of a cube varies directly as the square of its edge. Find its surface are. 2. A certain object traveling at 24 meters per second has a kinetic energy of 72 joules. If the kinetic energy of that object varies directly as the square of
asked on November 24, 2013 
MathAlgebra
Bracy would like to form a right triangle our of her wooden sticks. She cut the first stick of the length 6 inches and the second stick of the length 4 inches. What should be the length of the third stick to make sure she will be able to form a right
asked on October 22, 2013 
Math  Algebra
Write an equation for the given: "f varies inversely as m and f is 32 when m is 0.2." Also, find f is m = 4.
asked on October 17, 2013 
Math
find the value of x in x^2x12=0
asked on February 27, 2014 
Algebra
Nick budgets from 300 pesos to 900 pesos for trees and/or bushes to landscape his yard. After shopping around, he finds that good trees cost 150 pesos and mature bushes cost 75 pesos. What combination of trees and/or bushes can he afford to buy?
asked on February 26, 2014 
Math
The Toyota Co. has a daily production quota of $100,000 worth of cars. They produce two types of cars. Their compact model (x) is valued $10,000 and their luxury car (y) is valued at $20,000. A. Write an inequality that describes the production quota B. On
asked on February 24, 2014 
MathAlgebra
The Toyota Co. has a daily production quota of $100,000 worth of cars. They produce two types of cars. Their compact model (x) is valued $10,000 and their luxury car (y) is valued at $20,000. A. Write an inequality that describes the production quota B. On
asked on February 24, 2014 
Trigonometry
Using the Law of Cosines, how can I show that the measure of each angle of an equilateral triangle is 60 degrees?
asked on February 10, 2014 
math  trig
Why cant we solve an oblique triangle with the Law of Sines if we are given SAS?
asked on February 10, 2014 
Math  Trig
Explain why we cannot solve an oblique triangle with the Law of Sines given SAS.
asked on February 6, 2014 
Math  Alg
How much pure acid must be added to a 30% acid solution to make a 60L solution which is 50% acid?
asked on February 5, 2014 
Math  Alg
How much water must be added to an 80% acid solution to make a mixture of 50mL which is 70% acid?
asked on February 5, 2014 
MathAlgebra
The numerator of a fraction is 3 less than the denominator. If 5 is added to the numerator and the denominator, the value of the resulting fraction becomes 3/4. What is the original fraction?
asked on January 9, 2014 
Math  Algebra
Marcus saved 20 coins consisting of 25 and 1 coins. How many of each kind does he have is the coins amount to 10.25?
asked on January 9, 2014 
Algebra
True or false. 1. The system (2x  y = 3) and (x + 3y = 5) is consistent and independent. 2. There are infinitely many solutions to the system (2x  y = 3 and y = 2x + 5).
asked on January 4, 2014 
MathAlgebra
(Engineering) The current / varies as the electromotive force E and inversely as the resistance R. If in a system, a current of 20A flows through a resistance of 20 ohms with an electromotive force of 100V, find the currect that 150V will send throu+gh the
asked on December 18, 2013 
MathAlgebra
1. What is the base of a triangle if its area is represented by 3z^2+ √5z mm^2 and its height is z − √3 mm? 2. What will happen to the area of a rectangle if you do the follo+wing? a. multiply the length by 2 and use the same width b. multiply the
asked on December 18, 2013 
Algebra
Hi! Can you please recheck my answers. Mt teacher said some of them are not right but when I do it again, I still come up with the same answer. This is about Variations. Thanks! 1. What kind of variation equation is a=kbcd > my answer is joint variation
asked on December 12, 2013 
MathTrig
A helicopter hovers 105 m above the end of an island. If the angle from the helicopter down to the other end of the esland is 13deg30', find the length of the island.
asked on December 4, 2013 
MathAlgebra
1. The area of a square varies directly as the square of its side. If the side is halved, what would be the effect on its area? 2. If y varies directly as the square of x, what will happen to y when x is tripled?
asked on November 13, 2013 
English
Use the following verbals according to the functions provided. 1. scanning as a predicative nominative 2. polluting as a participle 3. to exaggerate as an appositive 4. composing as an indirect object 5. to demonstrate as a predicative nominative
asked on November 12, 2013 
MathAlgebra
If h^2 = 40000 j^8, then the principal root of h is _____.
asked on October 22, 2013 
MathAlgebra
What is the period of the pendulum if its length is 2ft?
asked on October 9, 2013 
MathAlgebra
What length will Jem swim diagonally if she wish to reach the opposite corner of a15meter pool which is square in shape?
asked on October 9, 2013 
MathAlgebra
To save a woman from a building, a fireman placed a 12meter ladder against the wall. The foot of the ladder was 2 meters from the wall. What was the location of the woman?
asked on October 9, 2013

Trig
Thanks to the both of you :)
posted on March 1, 2014 
MathAlgebra
The answer I got was 9 gal of the 40% alcohol solution and 3 gal of the 60% alcohol solution is needed. Am I right?
posted on February 4, 2014 
MathAlgebra
Thanks to the both of you for helping.
posted on December 18, 2013 
MathTrig
Thanks much :)
posted on December 5, 2013 
MathAlgebra
Thank you so very much :)
posted on November 11, 2013 
Math  Algebra
Thank you so much Jai. You explained it very well:)
posted on November 11, 2013