Saturday

April 19, 2014

April 19, 2014

Total # Posts: 712

**Trigonometry**

In 2010, the population of a country was 70 million and growing at a rate of 1.9% per year. assuming the percentage growth rate remains constant express the population P, as a function of t, the number of years after 2010.

**Math**

The answer is... Wait, I think I just forgot. Ohh.... Never mind! The answer is: The test scores are 34,56,78,98. So the fourth test score is 98. Hope this helped

**Heat Capacity**

When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100 g of water, the temperature rose from 23.9 C to 32.0 C. Calculate delta H (in kJ/mol) of for the solution process: NaOH (s) -> Na+(aq) + OH-(aq) Use a calorimeter heat capacity of Ccal = 15...

**Math**

-1/(x^3)-27 or -1=A(x^2+3x+9)+Bx+C(x-3) I'm trying to find the partial fraction decomposition. I think A=-1/21, but how do I find the right values to plug in for x to find B and C?

**Physics**

If you throw a ball straight upward at a speed of 24 m/s, how long will it take to reach zero speed? How long will it take to return to its starting point? How fast will it be going when it returns to its starting point?

**English - writing**

Is this a run-on sentence? Though I do believe we need to be useful, honorable, and compassionate to live a successful life, I would argue that the purpose of life is to be happy, but only through the aforementioned requirements can we achieve happiness, and thus, we may “...

**Physics**

Suppose there is a small hole (radius=0.0203) at the base of a large tank. If the height of water in the tank is 15m (a) what is the speed of water escaping through the hole? (b) Calculate the amount of water (in cubic meters per second) escaping the tank.

**chemistry**

5.49atm

**math**

How would you condense a logarithm expression into a single quantity if the logs have different bases?

**algebra**

What is (-2)^2 (-3)^2

**Math**

Theater has 108 seats, which are arranged in rows. The number of seats in each row is 3 less than the number of rows. How many rows of seats are in the theater.

**algebra**

Y^2-y-6

**Business Calc **

Determine when, to the nearest year, $3,000 invested at 5% per year, compounded daily, will be worth $10,000.

**Math**

Suppose that ln2=r. Use properties of logarithms to write the logarithm in terms of r. ln32=__

**english**

1. What about Thoreau’s night in jail made him angry? (1 point) The fact that his stay in prison was too short to make a point. The interference with his protest. The uncomfortable accommodations. 2. Why do the playwrights refer to their protagonist as “The Now Thore...

**algebra**

7 nickels to 22 dimes

**Math**

How do you simplify this? (x+3/x-6)-2/(x+3/x-6)+8

**math**

4((x/4)+5)-20 How do you solve this for x?

**English.**

2. worse than before he talked to virgil

**chemistry**

How many kilojoules of heat are released when 38.6g of CH4 reacts completely with O2 to form CH3OH at constant pressure?

**math**

(X`2-7x+10x`3+1) ÷(2X-1)

**College Physics**

two motorcycles of equal mass collide at a 90 deg. intersection. if the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?

**math**

The length of a rectangular area is 3 feet less than twice its width. The perimeter of the rectangle is 132 feet. Find the length and width of the rectangular area

**math**

Faye is making 13 bows to sell at the annual craft fair. She has 36 feet of ribbon to make her bows. If each bow requires 2 1/4 feet of ribbon will not be used

**public finance**

Your annual income is $50,000. You want to take out a mortgage loan to buy a house. The rule on mortgage loan requires that your annual mortgage payment cannot exceed 30% of your annual income. If the current interest rate is 5% for a 30-year mortgage loan, what is the maximum...

**public finance **

If the current interest rate is 5% for a 30-year mortgage loan, what is the maximum amount one can borrow for a house?

**College algebra**

Find the maximum value of: y=-3x^2 -15x +1

**math**

Prime & composite numbers explain

**Chemistry**

Calculate the quantity of cold water assuming that 50mL of cold water weighs 50g.

**Psyhology**

Why is it important to consider non-verbal communication from a cultural perspective when performing a patient diagnosis?

**earth science **

What are 10 facts about hurricane Isaac?

**lincoln high**

The mean hours of internet usage by adult in the US is claimed to be 25 hours per week. A hypothesis test is performed at a level of significance of 0.05 with a p-value of 0.08. Choose the best interpretation of the hypothesis test.

**statistics**

In a time-use study, 20 randomly selected managers were found to spend a mean of 2.40 hours each day on paperwork. The standard deviation of the the 20 scores is 1.30. Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for th...

**psychology**

Dr. Marquette is a researcher who studies the encoding, storage, and retrieval of information throughout life. What approach to cognitive development does she take?

**Volume **

Find the volume of the solid generated by revolving the region bounded by the given curves and line about the y-axis. y=50-x^2 y=x^2 x=0

**Finance**

YOU DEPOSIT $5,000 INTO THE FIRST NATIONAL BANK OF FIN 301 AND EARN 2.5% COMPOUNDED CONTINUOUSLY. HOW MUCH WILL YOU HAVE IN 5 YEARS?

**Physics**

The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (γ = 5/3). The process A-B is adiabatic. At point A, the pressure is 2.70×105 Pa and the volume is 0.0180 m3. At point B, the volume is 0.0450 m3. During a cycle, c...

**Physics**

A block on a spring moves in SHM with amplitude 0.23 m and period 3.8 s. The mass of the block is 2.1 kg. What is the total energy of the system?

**Physics**

Susie is out fishing on a calm, sunny day. She hooks an old tire that is resting on the lake bottom, and hauls it into her boat. In principle, how does the water level of the lake change?

**Physics**

Thanks

**Physics**

The hammer throw is a track-and-field event, popular in Scotland, in which a ball on a rope (the "hammer") is whirled around the thrower in a circle before being released. The goal is the send the ball as a projectile as far down the field as possible. At a track mee...

**Physics**

A bouncing ball returns to the same height each time. Is this an example of simple harmonic motion? Explain your answer.

**Physics**

15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00230 W/m2. What is the rate at which the source is emitting sound energy?

**Physics**

Two waves travel in the same medium at the same speed. One has wavelength 0.0382 m and frequency 9.67×106 Hz. The other has wavelength 0.0486 m. What is the period of the second wave?

**Physics**

A shipwrecked mariner is stranded on a desert island. He seals a plea for rescue in a 1.00 liter bottle, corks it up, and throws it into the sea. If the mass of the bottle, plus the message and the air inside, is 0.454 kg, what percentage of the volume of the bottle is submerg...

**Physics**

A cylindrical metal can with a radius of 4.25 cm is floating upright in water. A rock is placed in the can, causing it to sink 0.0234 m deeper into the water. What is the weight of the rock?

**Chemistry**

Neon gas produced for use in luminous tubes comes packaged in 1.0-L containers at a pressure of 1.02 atm and a temperature of 24°C. How many moles of Ne do these cylinders hold?

**Physics**

A 0.95 m rod with uniform mass distribution runs along the x axis with its left end at the origin. A 1.8 m rod with uniform mass distribution runs along the y axis with its top end at the origin. Find the coordinates of the center of gravity for this system.

**Physics**

A dancer completes 3.8 revolutions in a pirouette. What is her angular displacement? In Rad.

**Chemistry**

Never mind figured it out!!! Now to work on the rest of my questions!! if anyone needed help on this just take off one H on the end and add a - so it would be CH3CH2CH2CH2CH2CO2-

**Chemistry**

One of the substances that give wet goats and dirty gym socks their characteristic odors is hexanoic acid, CH3CH2CH2CH2CH2CO2H, which is a monoprotic weak acid. (a) Write the formula for the conjugate base of this acid.

**Chemistry**

That is what I thought was the answer. I am taking classes online and each time I put the equation in the chemPad it tells me "Your answer contains an ambiguous or incomplete reaction equation. Check all the components on the product-side of the equation."

**Chemistry**

Iodine pentafluoride is an incendiary agent, a substance that ignites combustible materials. This compound is usually made by passing fluorine gas over solid iodine, but it also forms when iodine monofluoride changes into the element iodine and iodine pentafluoride. (a) Write ...

**Chemistry**

What is the molarity of a solution made by dissolving 32.654 g of aluminum sulfate, Al2(SO4)3, in water and diluting with water to 125.0 mL total?

**Physics**

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97×1024 kg, the Moon's mass is 7.4×1022 kg, and the distance between their centers is 3.8×108 m.

**Physics**

The uniform sheet of siding shown has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the center of mass? Assu...

**Physics**

12 x 12

**Math**

2. The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T = 2π√(L/9.8) c. Graph this function for pendulums up to 20m in ...

**Chemistry**

How many mls of .1M KOH would it take to neutralize 75 mls of .07M CH3COOH?

**accounting**

On January 1, 2008 Touring company agreed to buy some equipment from Jones Company. Touring company signed a note,agreeing to pay Jones company $500,000 for the equipment on December 31, 2010. The market rate of interest for this note was 10%. a. Prepare the journal entry Tour...

**Discreet MAth**

Because the president saw the chocolate and he said chocolate and that is how its chocolate

**Grammar basic English**

Identify the preponsition in the folloing sentence: (You can't live your life hiding in your room all day.)

**Chemistry - Equilibrium Constant**

Determine the value of the equilibrium constant (Kp) at 800. K and 1 atm pressure. SbCl3(g) + Cl2(g) -> SbCl5(g) Delta G(o)f (SbCl5) = -334.34 kJ/mol Delta G(o)f (SbCl3) = -301.25 kJ/mol Delta H(o)f (SbCl5) = -394.34 kJ/mol Delta H(o)f (SbCl3) = -313.80 kJ/mol I got a K val...

**physics**

An athlete swings a 4.30 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.790 m at an angular speed of 0.590 rev/s. (a) What is the tangential speed of the ball? m/s (b) What is its centripetal acceleration? m/s2 (c) If the maximum tension the ...

**chemistry **

what is the final molarity when 250ml 0.45M is mixed with 350mL water

**Applied physics**

two motorcycles of equal mass collide at a 90 deg. intersection. if the momentum of motorcycle A is 450 kg km/h west and the momentum of motorcycle B is 725 kg km/h south, what is the magnitude of the resulting momentum of the final mass?

**physics**

A person pushes a block up a frictionless incline at a constant velocity. The incline is 35o, and the mass of the block is 28 kg. If he only exerts a horizontal force, how much work does he do if the block travels 7 m along the incline?

**physics**

A high jumper wants to clear the bar at 2.1m. To do so he needs to raise his center of mass to a height of 2.4m. Assuming that air resistance can be neglected and his center of mass is 1.1m above the ground at take-off, determine the required vertical take-off speed.

**pol science**

Locate indiana stateÂ’s constitution and examine the major elements and articles of the constitution. Review its contents and functions. Search for information about the judicial, educational, and social service systems offered in indiana state and the funding sourc...

**Chemistry**

In a 1.760 M aqueous solution of a monoprotic acid, 3.21% of the acid is ionized. What is the value of it's Ka? x=1.760M * 3.21/100 - .0565M Ka expression is Ka= {[H+][A-]} / [HA]

**Chemistry**

Calculate the pH of 100.0 mL ofa buffer that is 0.070 M NH4CL and 0.130 M NH3 before and after the addition of 1.00 ml of 5.55 M HNO3. Before = ? After = ? I know the base is NH3 and the acid is NH4Cl!

**history**

thanks Ms. Sue! :)

**history**

So I'm doing a paper regarding the industrial revolution and the working class.. I need your opinion with regards to the idea that the working class is an important agent of change.. During the industrial revolution, why do you think the proletariat was an agent of change?

**math **

2) In a certain instant lottery game, the chances of a win stated as "3 in 23". Express the indicated degree of likelihood as a probability value between 0 and 1 3) A certain company reduced its management staff from 20 managers to 16. The company claimed that 4 mana...

**math**

If a rubber band can be stretched to a circular shape that has a radius of 3.3 inches. How many 1.1 - mm diameter toothpicks of could fit within it? (1 inch = 25.4 mm)

**Chemistry**

What is the pH of a mixture formed by adding 51.0 ml of 2.5×10−2 M HCl to 140 ml of 1.5×10−2 M HI?

**Chemistry**

AgNO3+FeCl3 --> AgCl+Fe(NO3)3 In an experiment, it was planned to mix a solution containing 25 g of AgNO3 with another solution containing 45 g of FeCl3. a) What is the maximum number of moles of AgCl that could be obtained? I already found the limiting reagent, I just need...

**Calculus**

Determine the maximum and minimum value of the function f(x)=-xe^x + 2.

**Algebra**

My investment in website #1 stocks is losing half its value every 2 years. Find and interpret the associated decay rate. Round your answer to one decimal place. How do i find this? Do I use the half-life formula? Because I got it wrong I got 25% Thank you

**History**

(So, I have to agree or disagree with regards to the statement provided.. please comment on how I can make my answer better) Confirming Max Weber’s thoughts on the dynamics between religion, economics, and culture--Protestantism and urbanization had a mutual reinforcing r...

**history**

I mean.. Northern Europe! Not Western.

**history**

Can anyone explain to me how Max Weber’s thoughts on the dynamics between religion, economics, and culture can be related to Protestantism and urbanization in Western Europe? I know that according to Max Weber--religion, economics, and culture are intertwined with each ot...

**chemistry**

Hey the mass of mercury is wrong its 13.534g/cm cubed

**chemistry**

Given density of Mercury, 200.59....how do I calculate for the mass of 33.5mL

**Math**

Gymnast Clothing manufactures expensive hockey jerseys for sale to college bookstores in runs of up to 250. Its cost (in dollars) for a run of x hockey jerseys is C(x) = 2500 + 10x + 0.2x2 Domain(0 ≤ x ≤ 250) Gymnast Clothing sells the jerseys at $105 each. Find th...

**Math**

If you have a parallelagram ABCD, and line segment AB is on the left, can you read it as BA as well or is that backwards? Of if the alphabetical order was different and it was parallelagram PGAD, would you still only be able to read it as line segment PG or could it be GP as w...

**Math**

The Oliver Company plans to market a new product. Based on its market studies, Oliver estimates that it can sell up to 2,000 units in 2005. The selling price will be $5 per unit. Variable costs are estimated to be 20% of total revenue. Fixed costs are estimated to be $6,300 fo...

**Algebra**

Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 10% protein?

**Algebra**

The backyard of a house is in the shape of a triangle. The longest side is 4 ft shorter than twice the shortest side. The third side is 4 ft less than the longest side. If the perimeter of the yard is 162 ft, what are the lengths of the sides?

**math**

(x-11)^1/2=3

**math**

1 year = 12 months therefore you would do 12 x 2 = 24 which makes m = 24

**Math**

Given h(r) = (1/r) + 2,find the following. a) h(0) b) h(-1) c) h(-3) d) h(x^2) e) h(x^2 + 1) f) h(x^2) + 1 Thank You

**physics**

A car starts at a position of x=6 ft and has a speed of 7 mph. After 24 s the car has a speed of 40 mph. Determine the magnitude of the car's average acceleration during this time.

**business managment**

4)D not A

**business managment**

1)c 2)b 3)b 4)a 5)b

**business managment**

1. In a _______, consumers ultimately decide what should be produced. A. macroeconomic system C. free market system B. socialist economy D. command economy 2. Efficiency can best be defined as A. the amount of output generated in a given amount of time. B. producing items usin...

**Business management class**

3-pg41 4-pg22 16-pg48-49 21-pg81 23-pg76 25-pg47 here's were to find these answers april

**math**

(x) =pi/2-x g(x)= 5sinx/8+cos x find (gof)(pi/2) and (fof)(pi/2)

**math**

find the solution of the equation in [0,2pi) cos^2x-sinxcosx=0

**math**

find the solution of the equation in [0,2pi) cos^2x-sinxcosx=0

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