Friday
April 18, 2014

Search: O-Chem 253

Number of results: 14,436

Calculus
let the function be y = ax^4 + bx^2 + c since (0,10) is on it ----> c = 10 dy/dx = 4ax^3 + 2bx at (3,253), dy/dx = 0 4a(27) + 2b(3) = 0 108a + 6b = 018a + b = 0 b = -18a at (-3, 253) , dy/dx = 0 4a(-27) + 2b(-3) = 0 , this gives the same result, so nothing new here but (3,...
Sunday, April 7, 2013 at 9:20pm by Reiny

Precalc
253 factors into 11*23 So I do not see any simplification possible for &radic(253).
Friday, October 9, 2009 at 12:26am by Anonymous

Algebra
317 - 253 = 64 64/253 = 0.25296 = 25.3%
Thursday, September 20, 2012 at 9:29pm by Ms. Sue

Calculus
Find a formula for the fourth degree polynomial p(x) whose graph is symmetric about the y-axis (meaning it has no odd powers of x), and which has a y-intercept of 10, and global maxima at (3,253) and (−3,253).
Sunday, April 7, 2013 at 9:20pm by Dana

math
Just guess how many times the first digit of the divisor will go into the first digit(s) of the dividend. For example 253)820423 I'd guess 4 for the first digit of the quotient, since 2 goes into 8, 4 times. In this case, it won't work, since 253*4 > 820, so we'd back off ...
Monday, October 24, 2011 at 5:20pm by Steve

math/geometry
draw a triangle from the diameter horizontal, up from the horizontal 3m to intersect the circle, then the hyp is the radius back to the center. h=3m so 3/5 = sinTheta theta= 36.8deg So the person is below nine meters then the bottom 180deg, and the top each side 36.8 deg, or a...
Sunday, April 11, 2010 at 4:54pm by bobpursley

PHYSICS
Wb = m * g = 100kg * 9.8N/kg = 980 N. F1 = 980*sin15 = 253.6 N. = Force parallel to the ramp. F2 = 980*cosi5 = 946.6 N. = Force perpendicular to the ramp. Fs = F1 = 253.6 N. @ 15o u = Fs/F2 = 253.6/946.6 = 0.268
Thursday, October 3, 2013 at 7:02pm by Henry

mcc
220,000 * 1.15 = 253,000 253,000 * 0.88 = 222,640
Wednesday, May 1, 2013 at 7:42pm by Ms. Sue

math
Since each day has 24 hours, it is a good idea to divide 253 by 24 to find the number of complete 24-hour intervals in 253 hours and the number of hours remaining after the 24-hour intervals have been accounted for. When 253 is divided by 24, the quotient is 10 and the ...
Tuesday, March 25, 2008 at 8:05pm by yaes

math
Since each day has 24 hours, it is a good idea to divide 253 by 24 to find the number of complete 24-hour intervals in 253 hours and the number of hours remaining after the 24-hour intervals have been accounted for. When 253 is divided by 24, the quotient is 10 and the ...
Tuesday, March 25, 2008 at 8:05pm by yaes

chemistry - oops
OOps a typo has crept in! so 253 g contains 63.55 x 253 g/159.6 = 101 g (to 3 sig figs as the minimum number of sig figs in the calculation is 3)
Thursday, September 9, 2010 at 12:33am by Dr Russ

Chemistry
I don't get that. I get -1352.9 for dH. I didn't throw away the 0.15 from 273.15. Since dS is measured to so many places I used (253.15K) for the second T. -1352.92 kJ/mol Then dG = -1352.92 -(253.15)(0.28867) Is this what you have? I don't think that is -1279.89.
Tuesday, April 30, 2013 at 4:01pm by DrBob222

Finance
Rate = $X per hour. Pay = 28X + 253 = 400 28x = 400 - 253 = 147 X = $5.25 per hour.
Friday, January 17, 2014 at 1:19am by Henry

physics
X = Hor. = 0.97 m/s. Y = Ver. = 3.2 m/s.@ 270o. tanAr = 3.2/0.97 = 3.29897 Ar = 73.1o = Reference angle. A = 180 + Ar = 180 + 73.1 = 253.1o Degrees off course = 270 - 253 = 17o.
Monday, October 8, 2012 at 1:40pm by Henry

Help Please!!!- Physics
East component of wind = (cos 31.5 x 30) = 25.578kph. South component of wind = (sin 13.5 x 30) = 15.625kph. The south component slows the plane, so subtract. (100 - 15.625) = 84.375kph north speed. In 3 hrs, it proceeds (84.375 x 3) = 253.125km. The east component blows the ...
Friday, November 22, 2013 at 12:00pm by me

Physics
65 * 9.81 * .45 = 287 N friction hanging climber weight = force down = 55 * 9.81 = 539.6 N net force = 539.6 - 287 = 253 N total mass being accelerated = 55+65 = 120 Kg a = F/m = 253/120 = 2.11 m/s^2
Sunday, July 15, 2012 at 3:15pm by Damon

resultant vector
I can do that in weeks or months, not hours! Total displacement is the sum of the components of individual displacements. Most of the time, displacements are resolved in x (or east) and y (north) directions. 200 miles -> east = (200,0) 100 miles -> north = (0,100) 75 ...
Tuesday, November 23, 2010 at 8:40am by MathMate

chemistry
2HI ==> H2 + I2 9.4 kJ energy produces 2 g H2 AND 2*127 = 253.8 g I2. So 100 kJ will produce what? 2g H2 x 100/9.4 = ? g H2. 253.8 g I2 x 100/9.4 = ? g I2.
Sunday, May 6, 2012 at 11:56pm by DrBob222

math
Ab = (3.75/12)*(8/12) = 0.20833333 ft^2. = Area of each brick. Ap = 18.75 * 13.5 = 253.125 Ft^2. = Area of patio. Bricks = Ap/Ab = 253.125/0.20833=1215. ap
Tuesday, November 27, 2012 at 12:30pm by Henry

physics
A block of mass 4.253 kg is released on the track at a height 5.52 m above the level surface. It slides down the track and makes a head-on elastic collision with a block of mass 17.012 kg, initially at rest. The acceleration of gravity is 9.8 m/s2 . Calculate the height to ...
Wednesday, October 27, 2010 at 7:55pm by paul

chem need help
The most prominent line in the atomic spectrum of mercury occurs at a wavelength of 253.652 nm. What is the energy of 0.625 moles of photons associated with the most prominent line? Express answer in kJ. ANS: 295 kJ Please explain.. Thank you so much!
Saturday, October 20, 2012 at 4:41pm by Kjd

Chemistry
Note that you inverted the formula (again?). The formula is PV = nRT and if you solve for n, that will be n = PV/RT. You can work this two ways. n(total) = (0.850)(4.0)/(0.08206)(291) = 0.142 total moles. You know there is 0.100 mol neon; therefore, there must be 0.142-0.100...
Monday, April 25, 2011 at 2:49pm by DrBob222

math- check me
Sung rented a truck for one day. There was a base fee of $17.99, and there was an additional charge of .90 cents for each mile driven. Sung had to pay $253.79 when he returned the truck. For how many miles did he drive the truck? $253.79=$17.99+.90 -$17.99 $$238.80=.90 divide ...
Tuesday, February 15, 2011 at 9:08pm by Jena

Pre-calc
V = linear speed r = radius omega = angular velocity RPM = Revolutions per minute r = diameter / 2 60 mph = 60 * 5280 ft V = r * omega 60 * 5280 = ( 2.5 / 2 ) * omega 316,800 = 1.25 omega Divide both sides ba 1,25 316,800 / 1.25 = omega 253,440 = omega omega = 253,440 radians...
Wednesday, May 23, 2012 at 9:41pm by Anonymous

Acc. Algebra 2
smaller rate --- x larger rate ----- x + .03 1200x + 2200(x+.03) = 253 1200x + 2200x + 66 = 253 3400x = 187 x = .055 lower rate is 5.5% higher rate is 8.5% check: return on 1200 = .055(1200) = 66 return on 2200 = .085(2200) = 187 which is $121 more You actually had more ...
Tuesday, September 3, 2013 at 9:07pm by Reiny

Math
i=253
Tuesday, May 4, 2010 at 4:58pm by gorge

math
253
Tuesday, March 29, 2011 at 11:51am by Jai

math
253 -127 = ?
Tuesday, January 22, 2013 at 4:14pm by PsyDAG

algebra
y = 1/((1/3)x^2 - 253/12)
Tuesday, March 22, 2011 at 10:29am by Reiny

math
no the answer is 253
Thursday, November 17, 2011 at 8:39pm by Millie

math
253 - 127 = ?
Tuesday, January 22, 2013 at 2:37pm by Ms. Sue

Precalc
Can you simplify radical 253?
Friday, October 9, 2009 at 12:26am by MUFFY

Trig
I get 252.717 or 253
Monday, June 10, 2013 at 7:06pm by Reiny

algebra
how do you solve for y in the equation 1/y=(1/3)x^3-(253/12)
Tuesday, March 22, 2011 at 10:29am by charlie

Algebra
253/11.5 = 22
Sunday, July 3, 2011 at 4:31pm by Ms. Sue

statistics
Each person in random sample of 247 male and 253 female working adults living in Calgary, Canada was asked how long, in minutes, his or her typical daily commute was. use teh accompanying summary statistics and an appropiate hypothesis test to determine if there is convincing ...
Wednesday, April 20, 2011 at 11:03pm by BOB

chemistry
Lindsay - copper does not have a MW it has an atomic mass. The answer 100.73 g has too many sig figs. There is no necessary information missing in the question and there is no need to use moles. It is a question based on simple ratios. Atomic mass for copper is 63.55 g the ...
Thursday, September 9, 2010 at 12:33am by Dr Russ

8th grade,math/probability
25/253
Tuesday, August 31, 2010 at 3:06pm by dawit

Chemistry
Substance ( -253 -417 195 -475
Thursday, June 16, 2011 at 1:00pm by Anonymous

Chemistry
I know how you obtained the wrong answer. You divided 0.06/105 and multiplied by 100 to get 0.0561 BUT you don't have the units right. Atomic mass I = 126.9 molar mass I2 = 126.9 x 2 = 253.8 0.06 mol I2 = (253.8g/mol) x 0.06 mol = 15.22 g I2. Total mass is 15.22 + 105 = ?? ...
Thursday, September 13, 2007 at 3:39pm by DrBob222

Physics
A 6090kg space probe mobing nose-first toward Jupiter at 105m/s relative to the Sun, fires its rocket engine ejecting 80 kg of exhaust at a speed of 253 m/s relative to the space probe. What is the final velocity of the probe? I should have gotten 108m/s Can yoou show me the ...
Friday, February 2, 2007 at 3:59pm by Tammy

DrBob222
Everything is right except the system...i put -253.5 and it marked me wrong :(
Thursday, March 15, 2012 at 12:41am by Kelsey

math
A = pi * r^2 A = 3.14 * 81 A = 253.34 square yards
Friday, January 25, 2013 at 12:33pm by Ms. Sue

math
Weekly pay: $253.07 Not married Exemptions: 3 What is the federal tax?
Friday, February 21, 2014 at 2:04pm by clark

math
The population is 2,253,291 in 2000 and 2,264,617 in 2001. What is the growth rate? Thanks!
Sunday, April 27, 2008 at 11:32am by Charlotte

business math
Weekly pay: $253.07 Not married Exemptions: 3 What is the federal tax?
Wednesday, January 22, 2014 at 2:55pm by Anonymous

math
1,643,253 round to the nearest hundred thousand.is this the right answer 1,640,000
Wednesday, March 25, 2009 at 8:19pm by queeneka

physics
A jet travels at 435 m/s. How long does it take to travel 253 m? Answer in units of s
Wednesday, January 23, 2013 at 8:10pm by gera-pleaseeeee

business math
Weekly pay: $253.07 Not married Exemptions: 3 What is the federal tax? $19
Wednesday, January 22, 2014 at 2:55pm by jay

Statistics
mean = (4,253+ 5,578 +6,406+ 7,334+ 8,728 + 11,298 +15,182)/ 7
Thursday, March 27, 2014 at 11:50pm by Kuai

Chemistry
How many moles of chloroform, CHCl^3, are required to fill a 253-ml flask at 100.0 degrees Celsuis and 940 torr?
Monday, March 14, 2011 at 11:47pm by Nick

math
(11/3)*(23/8) = 253/24 = 10 13/24
Monday, March 2, 2009 at 11:14pm by drwls

Algebra2...........
1st digit: 2 last digit: 3,5 So, there are 1*2*2 = 4 possibilities. Check: 235 245 253 254
Monday, July 1, 2013 at 11:10pm by Steve

Algebra 2
1st digit: 2 last digit: 3,5 So, there are 1*2*2 = 4 possibilities. Check: 235 245 253 254
Wednesday, July 3, 2013 at 4:31pm by Steve

algebra
253 miles/ 23/2 gallons = 506/23 mi/gal= = 22 mpg
Saturday, July 9, 2011 at 7:45pm by bobpursley

math help
340-127=213pages in the morning before the afternoon 253-213=40pages read in the afternoon
Tuesday, January 22, 2013 at 4:57pm by tom

Math Help
Perform the calculation mentally 1. 90 + 247 + 253 + 110 2. 799 - 117 3. 25 25 8
Friday, April 16, 2010 at 11:01am by Raven

physics
A bullet is fired straight up from a gun with a muzzle velocity of 253 m/s. Neglecting air resistance, what will be its displacement after 2.9 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m
Monday, October 22, 2012 at 8:04pm by Anonymous

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0C and a cold reservoir temperature of -20.0C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kWh...
Thursday, July 25, 2013 at 11:27pm by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0C and a cold reservoir temperature of -20.0C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kWh...
Friday, July 26, 2013 at 2:09pm by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0C and a cold reservoir temperature of -20.0C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kWh...
Sunday, July 28, 2013 at 1:33am by Justin

physics
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0C and a cold reservoir temperature of -20.0C? (b) How much heat in kilocalories would it pump into the warm environment if 3.60 multiplied by 107 J of work (10.0 kWh...
Sunday, July 28, 2013 at 5:34pm by Justin

Math
Round 1,643,253 to the nearest hundred thousand. I say it's 1,600,000 but the workbook says 1,700,000. Please explain.
Friday, May 21, 2010 at 2:06pm by Aaron

government- banking industry
What happened when the government deregulated the banking industry? Since this is not my area of expertise, I searched Google under the key words "bank deregulation" to get these possible sources: (Broken Link Removed) http://www.socialstudieshelp.com/Eco_Deregulation.htm http...
Tuesday, December 12, 2006 at 3:25am by Anonymous

AP Chem
I looked at the first four, they are right. Dont you work with someone on chem homework? Like a study group? That is a very effective way to work chem and physics problems.
Wednesday, November 19, 2008 at 11:22am by bobpursley

Geometry
I need to find surface area of triangular prism-dimension of base is 9.9 by 6.2 distance between bases is 14.6 choices are: 436.278 466.97 332.94 253.46 Thank you
Monday, May 3, 2010 at 4:53pm by Julia

Algebra
If you drive 253 miles on 11 1/2 gallons of gas, what is the simplified ratio of miles to gallons? ____ to 1?
Sunday, July 3, 2011 at 4:31pm by Lamont

mgt 253
need to prepare rations for my own business but simply finding and listing the rations for the industry that your business will be in
Thursday, October 28, 2010 at 12:54am by offy

algebra
If you drive 253 miles on 11 1/2 gallons of gas, what is the simplified ratio of miles to gallons?
Saturday, July 9, 2011 at 7:45pm by Anonymous

physics
A) 40 cos53*253 = 6090 J B) All of her work is done against friction. Friction does -6090 J
Thursday, March 7, 2013 at 6:22am by drwls

Chemistry
What molarity of KNO3 should be used in order for dilution of 63.2 mL to yield 253 mL of 0.319 M KNO3?
Thursday, October 25, 2012 at 11:27pm by Kimber

statistics
Data: 2 independent variables (k=2) 16 observations Durbin-Watson statistic = 2.78 (possible negative correlation) Null Hypothesis: No autocorrelation exists in the residuals. a. At the 0.05 level of significance for k=2 and 16 observations, DL=0.982, DU=1.539 for positive ...
Monday, August 17, 2009 at 5:09pm by MathMate

Trig
Using law of sines, this is what I got: x/sin37 = 100/sin10 x = 346.6 ft h/sin47 = 346.6/sin90 h = 253.5 ft Is this wrong...?
Tuesday, April 16, 2013 at 5:06pm by Mary

CHILD DEVELOPMENT
Which of the following budget items is usually given the lowest priority in running a child care facility? A. CLASSROOM MATERIALS B. SALARIES and BENEFITS C. MAINTENANCE D. SCHOOL EQUIPMENT salaries and benefits Since this is not my area of expertise, I searched Google under ...
Friday, November 24, 2006 at 8:17am by Karrie

Quadratic equations- word problem
How do you get 1.333x+17.697 and 1.333x+0.444+17.253 and (x-0.667)^2+17.53?
Saturday, February 16, 2008 at 11:22am by Marysvoice

Math permutations
pi=(245)(1354)(125) 1) Write as a product of disjoint cycles. Ans: (14)(253) Is this correct? 2) Solve : pi^2, pi^5,pi^(-1) 3) What's the order of pi? and why?
Saturday, November 24, 2007 at 10:27pm by Rick

Physics
tanα = x(max1)/L = λ/d =545.110^-9/0.25310^-3 =2.1510^-3 α = 0.123 o
Tuesday, April 10, 2012 at 5:25pm by Elena

Chemistry Question!!
Your procedure appears to be ok down to the last step. The divisor should be the 0.830/253.8 = 0.00327 and not 0.00395 since the 0.830 g was the equilibrium amount. Also, watch the number of significant figures. That sometimes causes problems.
Friday, February 19, 2010 at 7:48pm by DrBob222

Acc. Algebra 2
Jan invested $1200 at a certain simple interest rate and $2200 at 3%higher. Her annual earnings were $253. Find the two interests rate if she earned $121 more on the larger investment than on the smaller.
Tuesday, September 3, 2013 at 9:07pm by Lisa

OCEANOGRAPHY HELP
Sediments composed of particles of one size are called ___________. I think it's well-sorted but am not sure. You are correct. See: http://72.14.253.104/search?q=cache:BtQzENSvQ4MJ:flightline.highline.edu/wmoses/Ocean101/OC101PowerPoints/Sediments.ppt+Sediments+%22particles+of...
Saturday, November 25, 2006 at 12:44pm by Pat

principles of microeconomics
This website seems to deal with that question: http://72.14.253.104/search?q=cache:OX_R_zHSVd0J:www.ssc.wisc.edu/~snavarro/Econ_301/LECTURES/Chapter7.pdf+%22product+curve%22+isoquant+map%22&hl=en&ct=clnk&cd=4&gl=us&ie=UTF-8 It is not a subject I am familiar with, it looks like...
Sunday, November 11, 2007 at 10:50am by drwls

algebra
Not too sure what the expression is supposed to be. My best interpretation of the expression is: (50/10)³ * 2 + 6(0.6) =5³ * 2 + 3.6 =125*2+3.6 =250+3.6 =253.6 Note: check the original expression first.
Friday, December 3, 2010 at 7:40am by MathMate

Algebra
I'm totally confused help please?!? In 1990, 253 million people visited theme parks in the United States. In 2000, the number of visitors increased to 317 million people. What was the percent of increase?
Thursday, September 20, 2012 at 9:29pm by Claire

Writing
That's an OK way to start your paper if you are in 5th grade. If you are older, though, you should try for more sophistication and smoothness. Simply start out by telling a brief anecdote (little story) about something Hill Harper did that is one indication of why he's ...
Wednesday, August 22, 2007 at 10:21pm by Writeacher

math
Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253
Tuesday, October 30, 2012 at 1:12pm by Anonymous

math
As you (should) know, Sn = n/2 (a1 + an) S33 = 33/2 (a1 + a33) = 33/2 (3 - 253) = 33/2 (-250) = -33*125 = -4125
Tuesday, October 30, 2012 at 1:12pm by Steve

Data management
1)SOLVE: a) 2nP3 = 2(nP4) b)6(n+1P2) = 3nP2 2) If (nC12 = (nC8), find (nC17) and (22Cn) 3)simplify. a) n(squared) (n-2)! - n(n-2)! / n! b) (nC2) - (nCn-2) 4)If nPr - 506 and (nCr_ = 253, find n and r. 5) If (28C2r)/(24C2r-4) = 225/11, find r.
Thursday, October 27, 2011 at 9:55pm by Jane

Physics check
check your answers: a. In 12.8 seconds, how far do each travel? 1) d=41*12.4=508.4m 2) d= 1/2 (3.3)12.4^2=253.7 m well, that time is wrong. So check the other and see if the distances match.
Tuesday, July 13, 2010 at 7:37pm by bobpursley

AP CHEM
For the reaction A + 2B + C ----> 2 D + E the following initial concentration and initial reaction rates are found: [A]null (M) [B]null (M) [C]null (M) 0.150 0.150 0.150 0.275 0.150 0.150 0.275 0.564 0.150 0.150 0.314 0.253 0.193 0.314 0.217 initial rate wrt E (Ms^-1) 0.210...
Monday, February 25, 2008 at 4:11pm by Gabe

chem
I DONT GET WHATS DONE.. DR.Bob22 - could u please explain this again..thank u
Tuesday, February 17, 2009 at 12:10am by CHEM

chem help
ok thanks alot... the PartB asks for: What is the percent ionization of ammonia at this concentration?
Saturday, February 28, 2009 at 11:56pm by chem

CHEM organic chem
Responded above to a later repost.
Tuesday, November 13, 2007 at 6:18pm by DrBob222

gen chem
i tried that, apparently its not the right answer either =/.
Saturday, May 8, 2010 at 7:46pm by Chem

Math
What is the maximum slope for a bridge on an interstate? Since this is not my area of expertise, I searched Google under the key words "maximum slope interstate bridge" to get this possible source: http://72.14.253.104/search?q=cache:_pnq5Gew-asJ:www.modot.mo.gov/...
Monday, December 11, 2006 at 6:07pm by Carter

O.CHEM -> PLEASE CHECK!!
Thank you...good to know, but isn't there a "Dr.Russ" that works with Organic Chem??
Wednesday, March 12, 2008 at 9:48pm by K

chem
... This isn't in the right section. That's math, not chem. the answer though is, 23.
Wednesday, February 10, 2010 at 7:40pm by Nadia Samim

Chem
0.102 x 0.0821 x 273 / 1.0 what can i express this in the correct number of significant figures ?@_@
Wednesday, August 29, 2012 at 4:51am by Chem ):

Trig
as usual, draw a diagram. If the height is h, and the surveyor started out at a distance x from the tree, h/x = tan47 h/(x+100) = tan37 equating the values for x, h/tan47 = h/tan37 - 100 h/1.072 = h/.7535 - 100 h = 253.6 ft
Tuesday, April 16, 2013 at 5:06pm by Steve

chem
A.) You have to convert the concentrations to molarity 3.25 x10^-2 g/126.9g*mol-1=moles of I moles of I/10L=molarity I2(g)---->2I(g) I2=[x] 2I=(moles of I2/10L)^2 Since Kc =3.1 x10^-5=products/reactants, Kc=3.1 x10^-5=(moles of 2I/10L)^2/[x] Solve for x to get grams of I2, ...
Wednesday, February 20, 2013 at 4:57pm by Devron

Chem
maybe try using P1V1/n1T1 = P2V2/n2T2 ... im in chem too...
Saturday, February 27, 2010 at 1:16am by fellow student

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