# Posts by Daniel

Total # Posts: 1,111

**Chemistry**

Can i please get a formula to calculate the concentration of an acid when it reacts with a standard solution? ( preferably 0.1 M NaOH and viniger )

**math**

The angle of depression of two points on opposite sides of a building are on the same horizontal level with the foot of the buiding are 58 and 49 respectively from the top of the building. If the building is 38m tall, calculate the distance between the points.

**Calculus II**

1) Compute the indefinite integral: integral 2x ln(x^2 - 8x + 18) dx 2) Note that x^4 + 1 = (x^4 + 2x^2 + 1) = (x^2 + 1)^2 - (sqrt2x)^2 ... use this trick to compute the following indefinite integral as an elementary function (with exact coefficients). integral 1 / (x^4 + 2x^2...

**Calculus**

If two people are taking a dog on a walk and have two leashes. One is at 18 degrees with a force of 23lbs and the other is at 15 degrees with 27lbs, how hard is the dog pulling if it holds them at a stand still?

**Algebra**

Would someone please verify my answer for the solution set of (x+20)(x -10)(x+11)>0, {x|(-20,-11)<x<(10,infinity sign)}

**Algebra**

Would someone please verify my answer for the solution set of (x+20)(x -10)(x+11)>0, {x|(-20,-11)<x<(10, ‡)}

**Algebra**

I posted this before but could not understand the answer. How do I write the solution set of: {x| } for (x+20)(x -10)(x+11)>0

**Algebra**

I really appreciate your help. I am still a little confused, when I add -36 +9 -99 I get 126. I don’t understand the -72.

**Algebra**

For w-4/w-9 – w+1/w+9 + w-99/w^2 – 81 = ,I get: 14w-126/w^2-81 or 14w-14/w^2-9. Would that be correct?

**Algebra**

Sorry, this is making me crazy. Thank you for pointing out my error. w-4/w-9 – w+1/w+9 + w-99/w^2 – 81 =

**Algebra**

Thank you for answering (x+20)(x -10)(x+11)>0. How do I write the solution set of {x| }

**Algebra**

Can anyone help with this last question? 8v/v^2-49 + v/v-7

**algebra**

I don’t really understand this and it is on a test; w-4/w-9 – w+1/w+9 + w-99/w^2 – 18 = Can anyone give me a hint...please

**algebra**

OK what you say make sense but I am unsure of the solution sets of {x| }

**algebra**

Can anyone please help with this inequality,(x+20)(x-10)(x+11)>0 The solution set is {x| }

**Math**

How do I do 6y/5x + 3y/10?

**Math**

What is 2x + 6y = 12? I need to find y, the slope, and the y-intercept. Please help!

**math**

Two fractions equivalent to 2/5: 4/10 and 6/15. Two fractions equivalent to 7/11: 14/22 and 21/33 Two fractions equivalent to 150/325: 300/650 and 450/975. To solve this I multiplied each fraction by a number (e.g. 2/2) For 2/5, I did 2/5 x 2/2 = 4/10. I hope I helped!

**english**

what are the adjectives in this sentence. it was a wild, dangerous ride down the rapids in an old canoe.

**4th grade**

That is not a sentence.

**algebra**

1. x2+5x+6 2. x2+7x+12

**math**

Nth expression for the following:6,11,17,24,32.....

**calculus**

Let g(x)= integraton (top 3x, bottom 2) e^t^4 dt. Find the value of g'(0).

**math**

Hi, this is a worksheet problem so i do not have the answer to it. It came with a pic though. Here is the link. Thanks. img121.imageshack.us/i/dsc01000vu.jpg/

**english**

extrapolated

**english**

after studying the clues, sherlock holmes _____________ that the butler had committed the murder. reconciled endeavored extrapolated aquiesced infused

**english**

1 A 2 E

**english**

1. B 2. C

**english**

1) lassitude 2) D

**english**

1) Due to the _____ of the fire, the residents of surrounding homes were evacuated. (A) magnitude (B) consensus (C) laaitude (D) deportment (E) simulation 2) Sophia lives a(an) _________nieghborhood; many people have a similar_________- (A) prosperous.....occupation (B) ...

**english**

thank you

**english**

The boys ____ climbingup the ______ cliff,but decided it was too dangerous. (A) asecended....lethal (B) contemplated....sinister (C) endured....mundane (D) simulated....dreary (E) declined....obscure

**Physics**

Yes, it will. use equation: minimum thickness= wavelength(nm)/(4*index of refraction) so for your example it would be t=600/(4*1.25) which comes to 120nm. for the second part, use eq. 2t= ((m*wavelength)/index of refraction) so again 2t=((1*600))/1.44) and t= 208.3nm

**science**

what is the oort and were is it located

**chemistry**

65.2g

**spanish**

Form complete sentence using the imperfect: Cada semana/yo/asistir a/escuela primaria

**MATH**

You shouldn't search help on PROMYs questions...

**6th grade Language Arts**

That's the word that I'm not allowed to use. So If I use compromise in the second blank, I don't know what to use in the first blank.

**6th grade Language Arts**

that's what I thought, but what about the first blank?

**6th grade Language Arts**

We had a great difference of _______, we finally came (together) on the (opinion) that something needed to change so we made a _______ that each person could live with. I need to fill in the blanks that mean the same as the words in parenthisis. This is a stem homework project...

**Math**

Bob and his dad visited the hardware store on Saturday. They observed the following transactions: Mr. Harris bought 4 for $0.50, Mrs. Clarke bought 21 for $1.00, Mr. Montaro bought 1,134 for $2.00, and Ms. Park bought 450 for $1.50. What were they buying?

**math**

2x^3(x^2+2x)^-1/2 -(x^2+2x)^1/2 / x^2 the whole numerator is over x^2

**Advice on IB subjects**

Hey there all! Im desperate for some advice on my subjects at IB! I have decided on chem bio higher and english spanish standard. I am battling between Maths and Economics higher! I really like Maths and had decided to take it but now that I told people my options everyones ...

**Algebra 1**

Dumb teacher Mrs sue has no life when will we ever use any of this $hît. But anyway the answer is; it is tacks free. No spaces.

**chemistry**

What is the pH of the solution that results from mixing the following four solutions together? (1) 150. mL of 0.250 M NaCl (2) 300. mL of 0.200 M HCl (3) 100. mL of 0.050 M HNO3 (4) 450. mL of 0.200 M NaOAc any help is greatly appreciated!

**chemistry**

What is the value of [HCO3- ]/PCO2 for someone with mild acidosis, with a blood pH of 7.30? 1. 0.038 2. 0.38 3. 0.030 4. 0.30 5. 3.0

**chemistry**

Thanks a lot!

**chemistry**

Which of the following mixtures will result in the formation of a buffer solution when dissolved in 1.00 L of water? i) 0.50 mol HClO2 and 0.25 mol HCl. ii) 0.50 mol HClO2 and 0.25 mol NaOH. iii) 0.50 mol NaClO2 and 0.50 mol HClO2. iv) 0.50 mol NaClO2 and 0.50 mol HCl.

**6th grade math**

Operations for 9/2m - 8 = -5.5 + 4m? Please help

**physics The range**

U2 Sin 2a = g =34.66m

**math**

i need help rounding numbers. for example, 34.566 to the nearest hundreds.

**algebra**

2x^2-8x-42 over 6x^2 divided by x^2-9 over x^2-3x

**math**

2xsquare- 8x - 42 over 6x square divided by x square - 9 over x square - 3 x

**math**

a movie theater charges $7 for an adult's ticket and $4 for a child's ticket. on a recent night the sale of child's tickets was three times the sale of adult's tickets. if the total anount collected for ticket sales was not more than $2,000, what is the ...

**math**

four times the larger number of two numbers is equal to seven times the smaller.the sum of the numbers is 22.find the numbers

**algebra**

a-13whena=13.so33-13=20 that's the ans 3x+2y-2zwhenx=5,y=2,z=1.so3(5)+2(2)-2(1)=17

**9th grade**

How do you factor this expression? 10x+15

**Calculus**

Prove that the average of LRAM and RRAM is equal to TAM.

**biology**

explain the role of antigens and antibodies in natural and artificial control of diseases

**social studies**

Where did the pickle first originate?

**Algebra**

x + square root of 5 / x - square root of 5

**accounting**

“When in need, Google!” has become the single solution for all and any problem under the sun. Your accounting homework problems are no exception to this. By the time you settle down in college after finding campus routes, remembering locker codes and making new ...

**9th grade**

s8impliy this exponential expression): -2 7 -8 ) 6 -9)8 (7) * (x) * (w * (x *(4) * -3) (w

**algebra**

How do you do standard form

**social studies**

the ottomans adopted a policy of religious tolerance.why did they follow this path?The golden Age of muslim.

**Physics**

A football player kicks a football with an initial velocity of 30m/s at an angle of 55 degrees relative to the flat ground. a)what is the speed of the football at its highest point b)find the highes point reached c)find the total time in the air d)how far is the football ...

**math**

What multiplication fact can be found by using the arrays for 2x9 and 5x9?

**Physics**

Measured along the surface of the water, a rectangular swimming pool has a length of 15.9 m. Along this length, the flat bottom of the pool slopes downward at an angle of 16.9 ° below the horizontal, from one end to the other. By how much does the pressure at the bottom of...

**Physics**

The Mariana trench is located in the Pacific Ocean at a depth of about 11 000 m below the surface of the water. The density of seawater is 1025 kg/m3. (a) If an underwater vehicle were to explore such a depth, what force would the water exert on the vehicle's observation ...

**Physics**

Standing waves are set up on two strings fixed at each end, as shown in the drawing. The two strings have the same tension and mass per unit length, but they differ in length by 0.55 cm. The waves on the shorter string propagate with a speed of 41.8 m/s, and the fundamental ...

**Physics**

A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling ...

**Physics**

The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension?

**chemistry 11**

Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of water per mole of ...

**12th grade**

Can someone look over my admissions essay for Brown?

**math**

3,000 / 90 = 33.33 students per instructor 3,500 / 33.3 = 105.1 105 - 90 = 15

**english**

what does the prefix etym mean

**literacy**

i need to know which country these words came from caravan,yoghurt,sofa,dessert and shampoo

**artist**

1485 to 1489

**social economics politics**

debate the following proposition: "the countries of india and china have a "right" to pollute the environment until they catch up with more industrialized countries".

**Physics**

50

**physics**

F=ma , T=ma T = (61kg)(9.81m/s^2) = ? N (do the math) Constant rate would mean there is no acceleration, so T = ma + m(0)== ma Furthermore, if the gymnast is climbing up at a certain acceleration, lets say 2.1 m/s^2, use the rate at which they climb for the acceleration in the...

**math**

how can i round each number to the place of the underlined digit?

**math**

how can i rounfd each number to the place of the underlined digit?

**government**

What is the action between the President and another head of state called?

**7th grade**

waht is used to mix substances, like a spoon, is two words?

**MATH Dx**

6/10

**science**

How do I diagram the four plant families? ( I remember rose family and pea family)

**Science**

What are the challenges of managing your chosen terrestrial resource issue?

**fractions**

i want to email you. please send email so i can send my math problems to you.

**Algebra**

In an arithmetic series, the terms of the series are equally spread out. For example, in 1 + 5 + 9 + 13 + 17, consecutive terms are 4 apart. If the first term in an arithmetic series is 3,the last term is 136, and the sum is 1,390, what are the first 3 terms?

**arithmetic**

N = the term number right?

**arithmetic**

How do you find the sum number of an arithmetic sequence? I forgot and my textbook does not explain it well.

**Chemistry UGH**

Help please! I can't solve any of these, would someone be as kind as to show me the answers? How many moles of NaHCO3 are in a 125.0 g sample of the compound? 3. How many moles are in 6.73 x 1024 water molecules? 4-5. AgBr, a chemical used in photography can be made with ...

**Chem**

If the rocket engine contains 1500.0 g of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540oC and a pressure of 1.2 atm? I honestly don't GET this thing, ugh =( Please Help!!

**12th grade**

Penn Foster Examination #93051 Cooking Appliances I've gotten 16 out of 25 completed but I'll just post the whole exam to make sure I have THOSE right. Thanks for your help guys!

**Calculus**

YA i can't fingure out how to use it either im thinking that it could be the xi = a+x(change of x)

**math**

I have the number of gun deaths in 2005=36,038 2009=43,146 I think these are too high but I followed the equation to arrive at these numbers. Have I made a mistake? I cannot figure the 9,383 number into a year after 2000.Can anyone help me?

**math**

The equation y=1777x27,153 can be used to predict the number of gun deaths in the US x years after 2000 that is x=o corresponds with 2000 x=3 corresponds to 2003 etc Predict the number of gun deaths in 2005 and 2009 In what year will the number of gun deaths be 9,383?

**Math**

I have figured the equation for this word problem Train A is traveling parallel to Train B. Train A is traveling at 100 mph and Train B at 110 mph Train A passes a station at 1:15pm Train B passes the same station at 1:45pm When will Train B catch up with Train A? I have 100*t...