# shane

Questions and responses by shane, page 2-
## Math

I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me with the last question? Thanks! a) Let a be the point (2,3). Compute the distance from Origin 0 to A answer: a^2 + b^2 = c^2 3^2 +

*asked on October 14, 2010* -
## Algebra

I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and -6 for x I got these as my ordered pairs to graph (3, 1), (-6,

*asked on January 6, 2010* -
## algebra

Last year, Hans deposited $3000 into an account that paid 5% interest per year and $7000 into an account that paid 4% interest per year. No withdrawals were made from the accounts

*asked on February 24, 2018* -
## Physics

A 5.20 g pellet is shot horizontally from a BB gun at a speed of 29.1 m/s into a 20.8 g wooden block. The wooden block is attached to a spring and lies on a frictionless table. If the collision is inelastic and the spring constant k = 22.0 N/m, what is the

*asked on November 14, 2016* -
## History!!!

What does this poll most suggest about U.S. citizens? a.) they belive that higher taxes are worth the cost and benefits b.) they think that most government programs have little value c.) they prefer fewer public goods and services over higher personal

*asked on April 30, 2015* -
## science

What is the mass of air in a room meauring 30 cubic meters if the density of air is 1.3kg per cubic meter?

*asked on March 15, 2015* -
## chemistry

A small quantity of hydrochloric acid and a large quantity of limestone chips (CaCO3) are reacted on a beaker, which was placed on the pan of a balance. The mass of the beaker and its contents were recorded every half minute. (a) Write a chemical equation

*asked on September 16, 2014* -
## maths

Write 1/2^1-n in non- fractional form.

*asked on May 19, 2014* -
## maths

Expand (1-x)^4. Hence find S if S = (1-x^3)^4 - 4(1-x^3)^3 + 6 (1-x^3)^2 - 4(1-x^3) + 1.

*asked on August 6, 2013* -
## maths

From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The base is 200m. Find the height of the flag pole.

*asked on April 5, 2013* -
## maths

Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.

*asked on March 10, 2013* -
## Science

Describe two features of internal anatomy that distinguish monocot and dicot roots.

*asked on March 6, 2013* -
## physics

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 260 N applied to its edge causes the wheel to have an angular acceleration of 0.795 rad/s2. (a)

*asked on November 15, 2012* -
## math

Danish used 9 balls of clay and 16 straws to make a solid pyramid. How many faces does the solid have?

*asked on March 29, 2011* -
## Algebra/math

I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and -6 for x I got these as my ordered pairs to graph (3, 1), (-6,

*asked on January 6, 2010* -
## Global History

Describe in 7 sentences the significant of each individual. 1. Aryans 2. Asoka 3. Brahmins 4. Confucius 5. Laozi 6. Shi Huangdi 7. Siddhartha Guatama 8. Untouchables 9. Wudi I believe the were all famous rulers but that is all I know

*asked on October 19, 2016* -
## Physics

Determine the magnitude of the force between an electric dipole with a dipole moment of 2 ✕ 10-29 C m and an electron. The electron is positioned r = 25nm from the centre of the dipole, along the dipole axis. Hint: Assume that r >> d, with d the charge

*asked on January 18, 2016* -
## Math

The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The manufacturer of the the antifreeze suggests that, for summer diving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is

*asked on November 24, 2015* -
## Math

There are two fractions that are given. The two fractions are 3/12 and 7/12.what answer so you come up with if you were to add these two fractions together? Would my answer be 10/12.

*asked on January 21, 2015* -
## chemistry

A 25 mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added util the indicator changed colour. It was found that 28 mL of the alkali was used. (a) What colour was the solution in

*asked on August 7, 2014* -
## maths

Given the quadratic equation y = -x^2 + 2x + 3. a) Will the graph turn upwards or downwards? b) What are the coordinates of x and y intercepts? c) What is the coordinate of the turning point? d) Use your answer in parts (a,b,c and d) to sketch the graph.

*asked on May 10, 2014* -
## maths

The length of a rectangle is 10cm greater than its width. The perimeter of the rectangle is 1m. Find the simplest expression for the perimeter if the width is x.

*asked on September 1, 2013* -
## maths

Sine and Cosine rule are both used in solving trigonometry problems.Give an example of when the cosine rule is more appliciable than the sine rule?

*asked on September 1, 2013* -
## maths

Expand (1-6x)^4 (1+2x)^7 in ascending powers of x up to and includeing the terms in x^3.

*asked on August 6, 2013* -
## math

tan(180-x)sin(360-x)cos90-x)cos(-x)/sin(x-180)cos(450+x)tan(180-x)

*asked on May 19, 2013* -
## maths

Please I need help.Show full working out. (a) sin x cot x= cos x (b) (1 + tan theta)^2 + (1- tan theta)^2 = 2sec^2theta

*asked on May 6, 2013* -
## maths

A surveyor finds two points A and B on a hillside to be 114.6 metres apart(measured along the line of sight) and finds the angle of elevation from A to B to be 21 degrees.On his plans these points must be shown at their horizontal distance apart.Find this

*asked on March 10, 2013* -
## Maths

The top of a T .V .tower casts a shadow 35 metres long when the angle of elevation of the sun 57 degree40 minutes.How high is the top of the tower?

*asked on March 10, 2013* -
## maths

A tourist viewing Sydney Harbour from a building 180 metres above sea level observes a ferry which is 850 metres from the base of the building.Find the angle of depression of his line of sight.

*asked on March 10, 2013* -
## chemistry

The system H2 (g) + 3N2 (g) = NH3 (s) is at equilibrium.Use Le Chatelier's principle to predict the direction in which the equilibrium will shift if the ammonia is withdrawn from the reaction chamber.

*asked on March 6, 2013* -
## statistics

An organization sends a random sample of surveys to 100,000 people and received 4,781 responses. A) Give a 95% confidence interval for the true proportion of those from their entire mailing list who may donate.

*asked on December 6, 2012* -
## Chemistry

Complete and balance the following equations.Identify each type of the reactions. (a) Cr + O2 >Cr2O3: (b)Na2CO3 + Mg3(PO4)2: (c)H3BCO+ H2O> B(OH)3 + CO + H2:

*asked on November 25, 2012* -
## statics

A cantilever beam member made from steel with hollow circular cross section experiences an axial load of 300 KN (F1), and a vertical load of 200 kN (F2) as shown in the following figure. The outside diameter of the beam is 50mm and the uniform wall

*asked on August 4, 2012* -
## math

two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes elapse between consecutive meetings of the runners?Express your

*asked on December 15, 2010* -
## Calculus

Given f(x)=sin(x)-2cos(x) on the interval [0,2pi]. Determine where the function is concave up and concave down, and increasing and decreasing. I have found that the answer for decreasing is (2.68,5.82). All answers are to be in interval notation like that

*asked on June 22, 2010* -
## statistics

(population) A normal distribution has a mean of 80 and a std dev of 20. For each of the following scores, indicate wheter the tail of the distribution is located to the right or left of the score, and find the proportion of the distribution located in the

*asked on February 7, 2008* -
## Thermodynamics

Help me please...! take home quiz >.< A 1Kg of Water at 80 degree Celsius is added to 0.8Kg of water at 20 degree Celsius find the change in entropy.?

*asked on September 3, 2015* -
## Thermodynamics

Can I have any energy transfer as heat transfer that is 100% available? Explain with equation

*asked on September 3, 2015* -
## Physics

An engineer has an odd-shaped object of mass 16 kg and needs to find its rotational inertia about an axis through its center of mass. The object is supported on a wire along the desired axis. The wire has a torsion constant κ = 0.4 N· m. If this torsion

*asked on April 15, 2015* -
## computer studies

Explain modelling molecules..please?

*asked on March 15, 2015* -
## chemistry

Calculate the molarity of sulfuric acid if 25.00 mL of 0.095 mol L NAOH reacts with 26.45 mL of the acid.

*asked on August 11, 2014* -
## maths

John wishes to determine the height of a flagpole. He takes a sighting of the top of the flagpole from point P. He then moves further away from the flagpole by 20 metres to point Q and takes a second sighting. Given the angle Q is 28 degrees and angle P is

*asked on June 7, 2014* -
## maths

2/ x^2 - 9xy^2 - 3/3x + 12y

*asked on May 6, 2014* -
## physics

A flower pot with a mass of 3.8kg is hanging by 2 wires that make an angle of 48° from the horizontal. what is the tension in each wire

*asked on October 19, 2013* -
## maths

Find the two stationary points on the curve when y = 2x/x^2 + 1

*asked on September 1, 2013* -
## Chemistry

0.2 Faradays of electricity were passed through solutions of sulphuric acid. Calculate the volume of hydrogen evolved at s.t.p in sulphuric acid.

*asked on August 24, 2013* -
## Chemistry

A solution container was only label 0.005M. When phenolphthalene was added onto the solution, the color of the solution turned pink. After identifying the type of solution,it was later titrated with sodium carbonate. If the solution was sulphuric

*asked on June 26, 2013* -
## Maths

The third term of a sequence is 2(2/3) and the sixth term is 9. Find the first six terms when the sequence is; (a) arithmetic (b) geometric

*asked on June 17, 2013* -
## Maths

AB is a 12 metre flagpole on top of a building. Given angle QPB=56 degree 37' and angle QPA=43 degree 19',find the distance of PB.

*asked on April 30, 2013* -
## Maths

Please I need help.Iam stuck with this question.Using sine and cosine rule: A rocket launced vertically from L is observed from A. Soon after launch when at position M its angle of elevation is 25 degree. After it climbs 4000m from this position to N its

*asked on April 29, 2013* -
## Maths

Find all the values of theta between 0 degree and 360 degree, and state the quadrants in which they exist. (a)cos theta=-0.71 (b)tan theta=1.732

*asked on April 5, 2013* -
## maths

From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The base is 200m. Find the height of the flag pole.

*asked on April 5, 2013* -
## Chemistry

(1) Use the thermodynamic values to (a) deduce the enthalpy change of each reaction (b)state if the reaction is exothermic,or endothermic,and also how much energy is released or absorbed. For thi reactions; (1) NH4NO3 (s)------>N2 (g) + 2H2O (l) (2) 4Zn

*asked on March 12, 2013* -
## maths

A ship sails on a steady course bearing 106 degrees from A to B.If B is 76 nautical miles further east than A,find,to the nearest nautical mile,how far the ship has sailed?

*asked on March 8, 2013* -
## Science

Invent a unit to measure how fast you spend your money

*asked on February 16, 2013* -
## chemistry

compleat and balance this equation. Na2CO3+Mg3(PO4)2

*asked on November 24, 2012* -
## Chemistry

Based on CaCo3 + 2HCl --> H2O + CO2 + CaCl. How many ml of 1.00 M NaOH should be used in the titration. 25ml of HCL and 750mg of Tums are combined to simulate an upset stomach.

*asked on November 20, 2012* -
## Chemistry

Based on CaCo3 + 2HCl --> H2O + CO2 + CaCl. How many ml of 1.00 M NaOH should be used in the titration. 25ml of HCL and 750mg of Tums are combined to simulate an upset stomach.

*asked on November 20, 2012* -
## math

Find the general solution using the method of undetermined coefficients. y''' - 10y'' + 25y' = e^(-x) cos x + e^(5x) + x.

*asked on May 8, 2011* -
## business communication

you are in a group that feels very cohesive, so cohesive that it seems to agree readily at every step of a project, without any lengthy discussion or conflict. sometimes you don't agree with decisions, but you do not say anything. which of the following is

*asked on April 20, 2011* -
## business communication

would the sentence "Time is Money!" be a good opening line for a letter urging a group of international business executives to come to an immediate decision about an investment opportunity? a. yes, because then they would realize that a delay could hurt

*asked on April 20, 2011* -
## statistics

Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage. Is the selection of 10 studets a binomial experiment? Explain.

*asked on March 16, 2011* -
## Biology

Explain how negative feedback systems maintain homeostasis in non-stable environments.

*asked on January 25, 2011* -
## geometry

A triangle has two angles that have measures of 22.5 degrees and 101 degrees. a. Find the measure of the third angle. b. Classify the triangle by its angle measures.

*asked on January 23, 2011* -
## chem

100 grams of sodium phosphate contains how many sodium ions? what is the formula?

*asked on December 16, 2010* -
## math

graph the inequality on a plane 2y-3x>6

*asked on June 6, 2010* -
## criminal justice

How are the ethic statement of the Montgomery, Al police department and the national association code of ethics similar?

*asked on February 7, 2010* -
## 12th grade English

Can you check my essay, it is not done, but I want to see if I'm on the right track? My essay is on Hamlet and the thesis statement: "Domino effect of death" Hamlet: A Chain Reaction of Death In Hamlet, death is seen throughout the play, and is one of the

*asked on December 26, 2009* -
## Math

I have tried this problem a few ways, and I am getting frustrating results. Could you help me out by showing me how to set the systems of equations Two angles are complementary The sum of the measure of the first angle and 1/4 the second angle is 82.5.

*asked on December 20, 2009* -
## science

you are the ceo of an Explosive company you hired an explosive expert named john and your paying john the explosion expert at $24.50 an hour while on the job there was an explosion that blew john 1 mile into the air as ceo you decide to dock his pay for

*asked on November 10, 2009* -
## Physics

According to the law of universal gravitation, there is force of attraction between any two bodies in the universe, WHY CAN'T YOU FEEL THIS FORCE BETWEEN YOU AND YOUR SEATMATE? ~>Thanks for those who are helping!

*asked on October 19, 2009* -
## physics

A 25 kg object accelerates from rest to a 0.45 m/s in 1.3 seconds. If the coefficient of friction between the object and the floor is 0.15. Find the force that can accelerate it. I don't know how to derieve the formula for this one..please help.. FROM the

*asked on October 14, 2009* -
## science

what material can we use as an indicator of acid?in other words,what material can we use to test a food to see if acid is present? what is the relationship between the concentration of acid in a liquid and the amount of carbon dioxide produced?

*asked on October 15, 2008* -
## Calculus

Suppose the population of a colony of ants grows at the rate: P’(x) = 1 + 5/sqroot(t+1) If there are 250 ants after 120 hours, what was the population at t=0?

*asked on April 1, 2018* -
## math and social networking

what could I use 39000 KB worth of data on in about six minutes of time on my s7 edge cell phone

*asked on September 24, 2017* -
## Math

Ethel collects animal stickers.She has 30 cat stickers,15 horse stickers,19 dog stickers and 11 rabbit stickers. One third of the horse stickers are round and the rest are square. One fifth of the cat stickers are square and the rest are round. All the dog

*asked on July 27, 2017* -
## English

What are two themes in Perseus Adventures? Reading the book but really don't understand the question

*asked on November 2, 2016* -
## Algebra

The sum of 3 consecutive odd numbers is 63. What is the smallest of these numbers

*asked on October 19, 2016* -
## Algebra

The difference between twice a number and a number that is 5 more than 3. Write an equation that could be used to find the value of the number n, and explain how you arrived at.at your choice

*asked on October 16, 2016* -
## Health

Identify and define the causes of mental disorders

*asked on October 10, 2016* -
## Math

An object with initial velocity of 20 m/s accelerates uniformly at 5 m/s in the direction of its motion for a distance of 10 m. What is the final velocity of the object?

*asked on September 27, 2016* -
## Physics

A piece of cobalt has a mass of 41 g and is initially electrically neutral. It is then charged with q = +0.6 µC. (a) How many electrons were removed from the piece of cobalt in the charging process (in electron) (b) What fraction of the total number of

*asked on January 18, 2016* -
## maths

Find the coordinates of the points of intersection of the straight line y = 3x - 6 with the parabola y = x^2 - 6x + 8 and solve Graphically.

*asked on May 12, 2014* -
## maths

Simplify; x^2 - x - 6/ 6xy divide x^2 - 9/2x^2y

*asked on May 6, 2014* -
## maths

Given the quadratic equation y = -x^2 + 2x + 3. a) Will the graph turn upwards or downwards? b)What are the coordinates of x and y intercepts? c)What is the coordinate of the turning point? d)Use your answer in parts (a,b,c,and d) to sketch the graph.

*asked on May 2, 2014* -
## naths

What is the equation of the line which has gradient 2, and passes through midpoint of (3,4) and (5,6)

*asked on April 19, 2014* -
## math

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take two pumps, working together, to empty the pool?

*asked on November 18, 2013* -
## maths

When the function f(x) is equal to 2xn + ax2 - 6 is divided by (x-1), the reminder is -7 and when divided by (x+3), the reminder is 129. Calculate the value of "a" and "n" and hence write the polynomial function completely.

*asked on October 1, 2013* -
## Chemistry

What would be the product formed for electrolysis of copper sulphate between the electrodes (a) Platinum (b) Copper and NaCl (aq) between (a)Platinum and (b) Copper electrodes?

*asked on August 14, 2013* -
## chemistry

1. In the following reactions, identify which reactants are the oxidizing agent and which are the reducing agents. a. 2S2O32- (aq) + I2 (s) ¨ 2I- (aq) + S4O62- (aq) b. NO3- (aq) + Zn (s) ¨ Zn2+ (aq) + NO2 (g)

*asked on July 26, 2013* -
## maths

The position vector of the point A(3,4) relative to an origin O is a. (a) Express vector a or (OA) in terms of i and j. (b) Find the magnitude of a. (c) Find the unit vector in the direction of a.

*asked on June 18, 2013* -
## Maths

Given the f (x) =2x^3 + ax^2 + bx - 9. (a)Find the value of a and b if f (x) has a factor x -3 but leaves a reminder of 8 when divided by x + 1. (b) Factorize f (x) completely and hence solve for x.

*asked on June 17, 2013* -
## Maths

Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic equation. State the quadrants in which each angle lie. 8 tan^2 theta + 2 tan theta=15

*asked on May 6, 2013* -
## Maths

An aircraft which is maintaining a constant altitude of 1000 metre is travelling directly away from an observer. At a particular instant the angle of elevation is 52 degree and 12 seconds later the angle of elevation is 16 degree. Find the distance

*asked on April 29, 2013* -
## maths

An airplane is flying at an altitude of 10,000m. The pilot sees two ships A and B. Ship A is due south of P and 22.5km away (in a direct line).Likewise ship B is due East and 40.8km from P. Find the distance between the two ships.

*asked on April 5, 2013* -
## maths

From an aircraft flying at 8000 metres above sea level the angle of depression of a ship is 36 degree15 minutes.How far is the ship from the plane in a straight line?

*asked on March 10, 2013* -
## maths

Two walkers set off at the same time from a crossroad and walk along flat straight roads inclined to each other at 68 degrees.If they both walk at a speed of 6km/h,find their distance apart 10 minutes later.

*asked on March 10, 2013* -
## Biology

Explain what is meant by source to sink flow in phloem transport.

*asked on March 8, 2013* -
## science

Describe two differences between xylem and phloem.

*asked on March 6, 2013* -
## science

What happens if water is lost from the leaves faster that it is taken up the roots?

*asked on March 5, 2013*