Tuesday

July 22, 2014

July 22, 2014

Total # Posts: 70,521

**Math**

i)When an identity is stated in terms of "x" what does say about the number x? ii)(generally) what are identities about? please help !!!!!

**calculus**

the weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. if a person weighs 180 pounds on the surface of the earth and the radius of the earth is 3900 miles, what will the person weig...

**physics**

If you have 2 objects of diferrent densities and you want them to have equal masses,what ratio of the volume to each other The answer I think the object with the greater density must have low volume compared to the other with small density

**Leadership**

How do you handle yourself when someone gets mad at you for punishing them when they clearly deserve it? (No multiple choices)

**math**

Six years after buying 100 shares of xyz stock for $40 per share you sell the stock for 6400. 6400-4000/4000=0.6 6400/4000=1.6 yx exponent in parentheses (1/4)=1.12468265 -1=0.12468265 =12.5

**HELP!!!**

Given the area of ABC=7.52m^2. Find a to the nearest hundredth meter when m<B=40 degrees and c=6m

**Algebra 2**

Every day, there are 5 times more likes on an internet video of a dog which is modeled by the function c(n) = (5)n − 1, where n is the number of days since the video posted. On the first day, there were 103 likes. What is the function that shows the number of likes each ...

**math**

Brett has been studying a type of bacteria that doubles every month. Originally, there were 5 bacterial cells. He wants to know how many there will be after 42 months. Which equation should he use? a42 = 5(2)42 − 1 a42 = 5(2)(42) a42 = 5(2)42 a42 = 5(2)(42 − 1)

**Trig laws**

Given the area ABC=7.52m©÷. Find a, when m¡ÐB=40¡Æ and c=6m.

**Trig laws help**

mÚA=15.52, c=18ft, b=16ft, then a=? ft

**Physics**

A plate carries a charge of -2.0 µC, while a rod carries a charge of +3.0 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

**Physics**

A plate carries a charge of -2.0 µC, while a rod carries a charge of +3.0 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

**math**

Find the simple interest on N280.00 for 2 and half years at 3% per annum.

**Trigonometry help**

A boat drops an anchor to the bottom of a lake. The anchor rope makes a 15 degree angle with the boat. The anchor rope is 24 feet long. To the nearest foot how deep is the lake? Would I use the cos function giving me 23 or the sin function giving me 6 but how would my set up be?

**Algebra/Steve**

thank you. and it keeps my mind on something else instead of crying Thank you for the prayers

**chemistry**

Can anyone explain to me the rate of disappearance and appearance? I had two problems and ive figured them out but i dont understand why they were solved this way. If the rate of appearance of Cr(SO4)3 is 1.24mol/min then what is the disappearance of C2H6O? 2 K2Cr207 + 8 H2SO4...

**programming oop **

I need a help regarding this. Compute and display the sum o 1st and 2nd number, Difference of sum and 3rd number, product of difference and 4th number, Quotient of product and 5th number using Eclipse Helios. My subject is OOP

**programming**

I need a help regarding this. Compute and display the sum o 1st and 2nd number, Difference of sum and 3rd number, product of difference and 4th number, Quotient of product and 5th number using Eclipse Helios. My subject is OOP

**math**

Create an equation you could use to calculate the cost one person spends on food for a year (assume no tax on the food), using this site. Your equation must work for any age range, and any gender

**geometry**

Find the image of P(–2, –1) after two reflections; first , and then . A. (–2, –1) B. (–1, –6) C. (4, –9) D. (1, –5)

**business**

You have just received good news. You have inherited $1,000,000 from a distant relative. You have to meet two goals with the money: one, start a small business and not spend more than $250,000 in total in the next 2 years, and two, save for your retirement in 30-35 years. How ...

**chemistry**

thank you

**chemistry**

What is the magnitude change in pH when 1.8g of NaOH is added 1L of a solution that is 0.100M in NH3 and 0.100 in NH4Cl? Kb for NH3 1.8 * 10^-5

**algebra**

To repair his kitchen subfloor, John cut a rectangular piece of plywood such that width and length were two consecutive odd integers. If the product of the length and width is 99, what were the dimensions of the piece of plywood?

**math**

I want to make a recipe which calls for 4/7 cup of granola. I only want to make 3/8 of the recipe. How much granola do I need to use.

**health**

Can someone help explain these directions?? For the energy-yielding nutrients, please convert the amount (grams) consumed to calories. This can be done by multiplying the amount of that nutrient consumed by the respective number of calories it provides (protein and ...

**health**

I am having difficulty with calculating the energy-yielding nutrients to gram and calories in order to figure out percent of energy contributed by that nutrient.

**stats**

A random sample of 50 households in community A has a mean household income of X =Rs. 44,600 with a standard deviation s =Rs. 2,200. A random sample of 50 households in community B has a mean of X = Rs. 43,800 with a standard deviation of Rs. 2,800. Estimate the di&#...

**Math**

A radioactive material takes 60 days to cut its radiation in half. If it starts at 100%, when will it be at 5%?

**chemistry**

what would the written chemical reaction be to this problem? How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.

**math**

Jefferson Bank made a loan at 6% interest for 146 days. If the amount of interest was $36.50, use the ordinary interest method to find the amount of principal borrowed. Round to the nearest whole dollar amount

**physics**

Find the work done by 2.32 moles of an ideal gas if its volume doubles at a constant temperature of 22.6°C.

**Chemistry**

A solution of KCI is saturated at 50 degrees C. How many grams of solute are dissolved in 100g of water?

**chemistry**

A solution contains 72.0 g of HCl and 468 g of (C6H6). What is the mole fraction of benzene?

**Physics**

You have a grindstone with a mass of 90.0 kg, 0.340-m radius, and is turning at 90.0 rpm. You press a steel ax against it, bringing it to a stop in 36.0 s. (a) What is the change in kinetic energy of the grindstone? (b) If the tangential force due to the friction between the a...

**english**

1. Give two examples of each of the following elements of fiction and nonfiction from the texts you’ve read in Units 1, 2, and 3. Characters: Plot: Conflict: Setting: Point of View: Theme: Style: Tone: Perspective: Bias: Purpose:

**physics**

Physics? Looks like elem calculus to me.

**math**

From a survey of 100 college students, a marketing research company found that 55 students owned iPods, 25 owned cars, and 15 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)?

**geometry**

The angle of depression from D to F measures 25°. If EF = 10 yd, find DE

**Trigonometry**

solve: sec x-2^.5=0

**physics**

an electric hot water heater takes in cold water at 13.0 degrees celsius and delivers hot water. the hot water has a constant temperature of 45 degrees celsius when the "hot" faucet is left open all the times, and the volume flow rate is 5.0 x 10 ^-6 m^3/s. what is t...

**Math**

146 pound

**Math**

How much will it cost to carpet a room that's 12ft by 15ft if the carpet cost $25 per square yard

**Finance**

1. (Covered Interest Arbitrage) Harry Norman, a foreign exchange trader at UBS’s office in Tokyo has $2,000,000 or its yen equivalent to invest. He faces the following exchange rates and interest rates. Show how can he profit from the covered interest arbitrage? Spot rate...

**Finance **

1. (Covered Interest Arbitrage) Harry Norman, a foreign exchange trader at UBS’s office in Tokyo has $2,000,000 or its yen equivalent to invest. He faces the following exchange rates and interest rates. Show how can he profit from the covered interest arbitrage? Spot rate...

**Physics**

46 mph

**Physics**

46 mph

**algebra**

the quotient of g and 9

**Chemistry**

If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58°C to 35.82°C. Calculate the heat capacity of the calorimeter (in J/°C). The specific heat of water is 4.184

**algebra**

If John stands near a 30 foot tall tree and leans a 50 foot tall ladder against the tree that reaches to the top of tree, then how far is John standing away from the tree? (Round to the nearest hundredth)

**math**

Lily designed a deck in her backyard that is in the shape of a quadrilateral that has only 1 pair of parallel sides. What is the shape of the deck?

**organic chemistry**

1. Arrange the following in order of decreasing reactivity toward nitration. Fully explain please I could use some help!! A. acentanilide, b. bromobenzene, C. acetophenone, D. toluene 2. Explain why p-nitrophenol is a stronger acid than phenol itself? Would p-methoxyphenol be ...

**algebra**

a rise of 4 meters and a rise of 6 meters

**Math**

Thanks ...its easy for you because your good in math. IM not.

**Math **

Use back substitution to solve the system of linear equations x-2y+z=8 y+z=5 z=2 **I tried to solve it eventho im still confused/lost. 1=3 idk ugh

**algebra**

Select the approximate values of x that are solutions to f(x)=0, where f(x) = -2x^2+8x+5

**chemistry**

"To save on production costs, most automobile bumpers are never coated with more than 200 g of chromium. Determine how much time a standard bumper should be immersed in a chromium vat." This is what I have so far- 96,485 coulombs are required to plate 1 Cr; 52/6 = 8....

**MATH **

Solve the system of linear equations 2x+y-3z=4 4x+2z=10 -2x+3y-13z=-8 *im so lost (all these numbers are in one problem)

**algebra**

scs paid $4400 to buy desks.it bought d desks all together.What algebric statement shows the cost for one desk?

**medical billing**

if an institutional review board is involved in a request information, the information is likely by a

**Organic Chemistry**

These questions are somewhat difficult. I believe I am on the right track, but I want to make sure. 1. List these compounds in order of decreasing reactivity towards nitration. Explain your answer. a) acetanilide b) bromobenzene c) toluene d) acetophenone 2. a) Which is the st...

**physics**

A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. If the walls are at 11.5° C and the rate of radiation is 75.2 kcal/h (a typical basal metabolic rate), what is the temper...

**Leadership**

Any order which you think is important! I don't know but I need help and assistantance

**Leadership**

I need help to put these characteristics in order. Please help me!! - dance ability -leadership -morality -ethical -responsible -caring -structured -organized -initiative -respectful

**biology**

Discuss the concept of species. What ways do modern taxonomists use to distinguish different species?

**Statistics**

there is a 1/5 (.20) probability that one type of appliance will break with in two years. find the probability that 4 out 15 such appliances willl break within that time period

**MaTh..**

Determine whether the system of equations is in row-echelon form. x-y+3z=-11 y+8z=-12 z=-2

**math**

Mr. Simon landscapes new houses for a building contractor. He charges by the square meter of yard space plus a setup fee. He billed the contractor $2,150 for a 400-square- meter yard and $1,650 for a 300-square-meter yard. Write an equation in the form y = mx + b that can be u...

**physics**

A sailboat race course consists of four legs, defined by the displacement vectors , , , and , as the drawing indicates. The magnitudes of the first three vectors are A = 2.80 km, B = 4.70 km, and C = 4.50 km. The finish line of the course coincides with the starting line. Usin...

**gometry**

in a circle of radius 17cm, two parallel chords are drawn on opposite sides of a diameter. the distance between the chords is 23cm. if the length of one chords is 16cm, find the length of the other.

**Maths**

30% of the pupils in a class are boys.there are 21 girls.how many pupils are there in the class in all?

**Maths**

30% of the pupils in a class are boys.there are 21 girls.how many pupils are there in the class in all?

**math**

'a gardener plants an orchid with 5776 trees. in each row there were as many trees as the number of rows. find the number of rows'

**math**

Approximately how much principal would need to be placed into an account earning 3.575% interest compounded quarterly so that it has an accumulated value of $68,000 at the end of 30 years?

**chemistry**

Calculate the volume of nitrogen gas that will be produced in the air bag of a car when 88,8g of sodium azide is thermally decomposed at 22 C to give the bag a pressure of 1,10 atm

**English**

Which one of the following statements about making your writing fun to read is not correct? A. The conversation you write must sound natural for the characters. B. An anecdote or humorous quotation is often more convincing than a strong argument. C. Direct quotations should be...

**English**

Which statement is most accurate regarding the speaking-writing connection? A. The words used by writers are not normally used in speaking. B. To own a word, speak it. C. Written words seldom reflect the words people use when they speak. D. To own a word, write it over and ove...

**english**

What is the name of the common error in the following sentence? Having risen because of the rains, the hikers were unable to cross the river. A. Run-on sentence B. Infinitive phrase C. Prepositional phrase D. Dangling modifier correct C. PrepositioNal phrase

**writing**

Choose the connective that belongs in the blank in the following sentence. Everyone appeared to be having a good time. _______, my impressions may have been wrong. A.In other words B.Furthermore C. Of course D. In fact CA. C. Of course

**Physics**

A high diver of mass 70 kg jumps off a diving board and enters the water with the speed of 10 m/s the average upward resistance force of water exerts on the diver is 200 N. How far in the water will the diver travel before coming to rest?

**Physics**

An antitank weapons fires a 3.5 rocket, which acquires a speed of 70 m/s after traveling 90cm down a launching tube. Find the net force during lonch?

**physics**

A 5kg crate falls from height of 2 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 25 cm what is the spring constant?

**MATH**

What if we have .. integration of xe^(|x|) dx from negative infinity to x.

**MATH**

what is the integration of e^-|x| from negative infinity to x ?

**American National Government**

If the President requests a Congressional authorization for the use of force, Congress

**Reading**

What are some good books to read for 7th grade?

**history**

After the election of 1890, organized groups supporting farmers called for the formation of a third party that became generally known as the _______ Party.

**CHEMISTRY **

COPPER

**algebra 2**

The height of an arrow shot in the air is given by the function h(t)=-16t^2+144t+24, where h(t) represents the height in feet, and t represents the time in seconds. what is the maximum height of the arrow? how long does it take to reach the maximum height? how long does it tak...

**Statistics**

Assume that a standardized test is designed to have the mean score of 100 and the standard deviation of 15. At the 95% confidence interval, how large does the sample size have to be if the margin of error is to be 3 points?

**math**

Compute Sun Jung's estimated tax payment for the second quarter. She is self-employed and she expects to earn $61,760 this year. Her estimated income tax rate is 23%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare tax is 2.9% ...

**chemistry**

calculate the percentage by mass of oxygen in trioxonitrate(v) acid

**chemistry**

calculate the percentage by mass of ozygen in trioxnitrate5 acid H-1, N-14, O-16

**English**

Which of these two sentences is correct? Is there a different correct format? This construction is different than in English. This construction is different from English.

**physics**

a pendelum in a fathers clock measures .90m from the support to the centerof the bob

**physics**

The cg of the 50.0 N pole held by the pole vaulter is 2.00 m from the left hand, and the hands are 0.700 m apart. Calculate the force exerted by each hand.

**Physics**

A person is carrying a plank of wood 2.00 m long with one hand pushing down on it at one end with a force F1 and the other hand holding it up at 50.0 cm from the same end of the plank with force F2. If the plank has a mass of 20.0 kg and its center of gravity is at the middle ...

**Physics**

Use Newton's second law: F=ma F=(1 kg)*2 m/s² = 2 N If F=2N and a=8m/s², then m=F/a

**Physics**

Use Newton's second law: F=ma, or a=F/m

**Algebra**

simplify 5!/3! A. 5 B. 20 C. 40 D. 120

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