# Posts by Shane

Total # Posts: 396

statistics
A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go to at least 3 ...

math
In a bag there are 3 green apples,5 yellow apples,7 green pears and 2 yellow pears,Simon randomly is taking fruit out of the bag by one by one. How many fruits must he take out in order to be certain that he has at least one apple and one pear of the same color?

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 maximum compression ...

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

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

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

Algebra
Thank you

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

Health
Identify and define the causes of mental disorders

Algebra
A rectangle has dimensions in feet as shown in the figure it is 2x +5 And one side is 8. I need to write an expression for the area of the rectangle. B. Find the area of the rectangle, in sq.ft. if x=3 C. Find the value of x if the area of the rectangle is 160 square feet.

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?

social-studies
parents have to be ready to have children around them

government
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted ...

Calculus
Estimate the area under the curve f(x) = x2 + 1 from x = 0 to x = 6 by using three circumscribed (over the curve) rectangles. Answer to the nearest integer.

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 electrons in the ...

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 separation ...

physics
An object in equilibrium has three forces exerted on it. A 25 N force acts at 90 from the x-axis and a 48 N force acts at 60. What are the magnitude and direction of the third force

Math algebra
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 3.6 liters, how much...

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 3.6 liters, how much...

Math
Two cars leave the same town and travel in opposite directions. At the end of 8 hours, the cars are 896 miles apart. Find the rate of each car if the rate of one car is 4 mi/hr more than the rate of the other.

Math
Gab and Van can mow the lawn in 40 minutes if they work together. If Gab works twice as fast as Van, how long does it take Gab to mow the lawn alone ?

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.?

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

basic electronics
3 resistor in parallel have an equivalent resistance of 1000 ohms. If R2 is twice the value of R3 and trice the value of R1, what is the value of R1,R2 and R3? Please show me the sol'n. n_n

accounting
As of January 1 of the current year, the Grackle Company had accounts receivables of \$50,000. The sales for January, February, and March of 2012 were as follows: \$120,000, \$140,000 and \$150,000. 20% of each month’s sales are for cash. Of the remaining 80% (the credit ...

Math

History!!!
Nevermind Reed, it was a picture of a poll that I couldn't put on Jiska so I answered it myself. Thanks.

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 costs d.) they dislike ...

History
Thank you Reed.

History
Me and my sister use the same computer. That is why Ms. Sue.

History
Thank you Ms. Sue.

History
What is one certain long-term cost of adding to national debt? a.) Americans in the future must have fewer public services b.) Americans in the future will not vote in elections c.) Americans in the future will not enjoy the benefits of the program d.) Americans in the future ...

I agree with PsyDAG your first is incorrect. If I can think correctly 1.) is b. But you are correct on questions 2, and 3. Fantastic job

Health
Alcohol: Three medications have been FDA–approved for treating alcohol dependence: naltrexone, acamprosate, and disulfiram. A fourth, topiramate, is showing encouraging results in clinical trials. Naltrexone blocks opioid receptors that are involved in the rewarding ...

Physics
Let 70.0 J of heat be added to a particular ideal gas. As a result, its volume changes from 65.0 cm3 to 169.0 cm3 while the pressure remains constant at 1.7 atm. By how much did the internal energy of the gas change?

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 pendulum ...

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?

computer studies

physics
A 2.40 kg mess kit sliding on a frictionless surface explodes into two 1.20 kg parts: 3.78 m/s, due north, and 5.28 m/s, 32.8° north of east. What is the original speed of the mess kit?

Math
Frank teacher was teaching the class about fractions. She posted the fractions 1/7 and 3/9 on the board. Frank was supposed to answer what the least common multiple of the two fractions was. What did he answer? Help

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.

Chemistry
I'm stumped 4ko2 + 2co2 ----2k2co3 + 3o2 What mass of k02 in grams is required to react with 8.90 l at 22.0 c and 767 mm hg? Please help thank you

Math
Prove the identity: sec^4x - tan^4x = 1+2tan^2x

chemistry
in HNO3 titration, you add few drops of phenolphthalein indicator to 50.0 mL of acid in a flask. you quickly add 20.00 mL of 0.0547 M NaOH but overshoot the end point, and the solutions turn deep pink. instead of starting over, you add 30.00 mL of acid, and the solution turns ...

chemistry
Ok. Thanks.

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 to show the reaction ...

Geometry
If EF= 10x+12, FG=14, and EG= 136, what is the value of x?

chemistry
For the electrolysis of molten potassium bromide: (a) write the equation for the reaction at cathode. (b) write the equation for the reaction at anode. (c) write the equation for the overall reaction.

chemistry
For the electrolysis of molten potassium bromide: Write the equation for the overall reaction.

chemistry
In the electrolytic refining of copper, write equation for the reaction of the impure copper.

chemistry
Write the anodic reaction for the electrolysis of concentrated zinc chloride solution. (a) Using plantium electrodes. (b) Using zinc electrodes

chemistry
Please I need help. Many,but not all, compounds are made up of positive and negative ions. Three positive ions A^+, B^2+ and C^3+ could form a total of six different compounds with negative ions, Y^2- and Z^3-. Derive the formulae for six compounds and write them in the table.

chemistry
How many moles of atoms are there in 32g of sulfur?

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.

chemistry
How many grams are there in 2.5 moles of CuSO4.5H2O?

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 the flask at the start ...

maths
A parallelogram has two adjacent sides of length 4cm and 6cm reapectively. If the included angle measures 52 degrees, find the area of the parallelogram.

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 53 degrees. Find how...

maths
An aircraft dropped a box of emergency supplies to a group of trampers. The height of the box above the ground, h, at time, t is given by the formula; h = 520 - 5t^2, where h is in metres and t is in seconds. Find how long it takes for the box to fall to the ground.

maths
Please I need help..how can I solve this guadratic equation?? 520 - 5t^2 = 0

maths
Solve this equation by completing squares and then check the solution.. x = 21/x-4

maths
a)Express y = 2 (x - 1) (x - 5) in the form y = ax^2 + bx + c. b) From the above quadratic equation calculate the following: I) x and y intercepts II) Coordinate of the turning point III) Is the graph a maximum or minimum turning point?

maths
An aircraft dropped a box of emergency supplies to a group of trampers. The height of the box above the ground, h, at time, t, is given by the formula: h = 520 - 5t^2 , where h is in metres and t is in seconds. Find how long it takes for the box to fall to the ground.

maths
Write without negative indices: a^-3b/c^-1

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

maths
Write as powers of 2. (a) 16 (b) 2^m/8

Thanks Latina !! 100%%%

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.

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.

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

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

maths
Simplify; (x - y)^3 divide x^2z - 2xyz + y^2z

maths
Simplify 5x/7 × 15y/8x

maths
Simplify; p^2 - p - 42

maths
Solve this equation; p^2 - p - 42

maths
Solve this equation; p^2 - p - 42

maths
Simplify; x^2 + ax + bx + ab divide x^2 + 2ax + a^2.

maths
Simplify this expression; X^2 + ax + bx + ab/x^2 + 2ax + a^2

maths
Simplify 5x/7 × 15y/8x

maths
Solve this equation. 2/5 (x^2 + 1) = x

maths
Find the coordinates of the points of intersection of the straight line y = 3x - 6 with the parabola y = x^2 - 6x + 8. a) Graphically b)Prove your answer in (a) algebraically

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.

algebra
How do you factor 2a^2+5x+3

maths
Write the equations below in the form y = mx + c. State how many solutions each systems of linear equation have. 3x = 6y 2y - 6x + 2 = 0

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

maths
What is the value of p if the line (3p + 1)x - 2y = 6p is perpendicular to the line 2x - y + 1 = 0

maths
Solve 2y - 5x = 3 and x + y = 5 using substitution.

maths
Show by calculations weather the following lines are parallel or not.. y + 5x = 1 and 0.2 = y - 5.

maths
Construct the table of values for the following equation 1 - 3x = 2y for -4<x <4. Use the answer to sketch the graph.

math
a recipe calls for 2 and 3/4 cups of milk. how many cups of milk written as a fraction greater than one are used in the recipe?

Physics
304.8 centimeters

Science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support.

Math
I don't get number one still

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?

home work
As Miss wishy washy need to give animals abou as Miss wishy washy need to give animals a bath

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

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?

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.

maths
Calculate the arc length that subtends an angle of 55 degree at the centre of a circle with radius r = 5cm.

maths
The relationship between the vertical height and the horizontal distance of a ball thrown at 45 degree is given by the equation y = x - x^2/50, where y is the vertical height and x is the horizontal distance. (a) Find the maximum vertical height reached. (b) Find the ...

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