Tuesday
September 2, 2014

Posts by Damon


Total # Posts: 18,204

Algebra
You are welcome.
August 23, 2014

Algebra
Yes
August 23, 2014

Algebra
yes, order does not matter.
August 23, 2014

Earth Science Continued
For 1 I would have picked B but if B is wrong go with D 3. B yes 5. C yes, it is an example of the theory in action
August 23, 2014

College Algebra 1
1 = 1^2 25 z^2 = (5z)^2 so (1-5z)(1+5z)
August 23, 2014

Algebra
well, yes, but they asked for the expression: $25 + 6($14) not the result: answer = $109
August 23, 2014

Algebra
You are welcome :)
August 23, 2014

Algebra
yes
August 23, 2014

Pre-cal
one way: cos 75 + cos 83 + .....cos 147 = a sin 75 + sin 83 + .... sin 147 = b tan theta = b/a r = sqrt (a^2+b^2)
August 23, 2014

Algebra
.01 x + .04 (5-x) = .02 (5)
August 23, 2014

nitw - Incomplete question
You need the coef of friction or the time or the deceleration
August 23, 2014

American Constitutional Law
I assume we are talking about the national guard which is usually run by the state but can be called up by the federal government if needed. Therefore I think C see: http://www.arng.army.mil/aboutus/history/Pages/ConstitutionalCharteroftheGuard.aspx
August 23, 2014

American Constitution Law
see answer above http://www.arng.army.mil/aboutus/history/Pages/ConstitutionalCharteroftheGuard.aspx
August 23, 2014

Math
1 Mas + 1.2 Mas = 550 Mas = 550 / 2.2
August 23, 2014

physics
x axis from center A to center B Ball A before Vx = 10 cos 60 = 5 sqrt 3 Vy = -10 sin 60 = -5 let m = 1 kg Ke = (1/2)(100) = 50 Joules Ball B before Vx = 0 and Vy = 0 and Ke = 0 Ball 1 after Vx1 Vy1 Ke1 =(1/2)(Vx1^2+Vy1^2) Ball 2 after Vx2 Vy2 (has no Vy because hit in x ...
August 23, 2014

physics
Negative wavelets. The original Huygens Principle does not clearly account for the wave direction. The important point is that the wavelet phase must be considered. However, the diagram below shows that additional negative wavelets easily solve this problem. The use of black ...
August 23, 2014

PHYSICS
F cos 30 = 30
August 23, 2014

Physics
F = G M1 M2 / d^2
August 23, 2014

maths
6/20 = 30/100
August 23, 2014

Math
multiply both sides by 6 y 8 + 15 = 6 y 6 y = 23 y = 23/15
August 23, 2014

algebra
I bet you mean 5 x^2 / (x^3-x^2) 5 x^2 /[ x^2(x-1) ] 5 / (x-1)
August 23, 2014

math
5^2 = 2.5^2 + h^2 h^2 = 25 - 6.25
August 23, 2014

science
I have no idea. There are two naturally occurring isotopes of silver, 107 and 109, but that is not enough difference.
August 23, 2014

Algebra
If you meant to type (3/5)^3 then you are right.
August 23, 2014

math
pi r^2 - 9 4 pi - 9 about 3.566370614
August 22, 2014

I have a pretty hard one
5600/27 is a common fraction
August 22, 2014

I have a pretty hard one
there is a trick to finding the fraction for a repeating decimal by the way. Google repeating decimal in this case for example .407407407 ---- 1000 x = 407.407407407..... x = .407407407.... so 999x = 407 x = 407/999 = 11/27
August 22, 2014

I have a pretty hard one
oh 70 / (45/100 *75/100) 70 * 100 *100 / (45 * 75) 14 * 20 * 100 / (9 * 15) 14 * 4 * 100 / (9 * 3) 5600 / 27 = 207 11/27 because 207 * 27 = 5589 and 5600 - 5589 = 11
August 22, 2014

I have a pretty hard one
.45 * .75 * n = 70 n = 70/ (.45*.75) n = 70 / .3375
August 22, 2014

math
.24 n = 45 so n = 45/.24
August 22, 2014

Physical science
http://dwb4.unl.edu/Chem/CHEM869R/CHEM869RLinks/www.nidlink.com/7Ejfromm/arrhenius.htm
August 22, 2014

math mental math
as I said down below 17 - 2 + 2 + 38 = 15 + 40
August 22, 2014

physics
been there, done that
August 22, 2014

physics
54 km/h * (1 h/3600 s)*(1000 m/km) = 15 m/s 15 m/s / 5 s = 3 m/s^2 (1/2) m v^2 Joules (1/2) m v^2 Joules/15seconds ---> Watts
August 22, 2014

math
DRAW A PICTURE The change of an integral at the right hand limit is the area defined by the height , f(x), times dx In other words the answer is f(2sqrt2) 2sqrt [2sqrt 2)^2+1] = 2sqrt(8+1) =2* 3
August 22, 2014

MATH HELP
17 - 2 + 2 + 38 = 15 + 40
August 22, 2014

MATH HELP
I would add 15 to 40
August 22, 2014

Related rates math in calculus
L = 18-2x w = 18-2x h = x V = x(18-2x)^2 dV/dx = 0 for max or min 0 = x (2)(18-2x)(-2) + 1 (18-2x)^2 0 = -4x (18-2x) + 324 - 72 x + 4 x^2 0 = -72 x + 8 x^2 + 324 -72 x + 4 x^2 0 = 12 x^2 - 144 x + 324 0 = x^2 - 12 x + 27 0 = (x-3)(x-9) x = 3 or 9 but 9 will not work (is V=0) ...
August 22, 2014

math
You are welcome :)
August 21, 2014

math
100,000 to 999,999 is one hundred thousand to nine hundred and ninety nine thousand nine hundred and ninety nine.
August 21, 2014

Earth Science
He said .... then .... experimentation supported Amit agrees :)
August 21, 2014

Earth Science
The scientist SUSPECTED that acid might be harmful. Therefore experiment to see if CO2 in water harms shells
August 21, 2014

Health
no
August 21, 2014

math
32 gal/min * (60 min/ hr) * (4 qt/gal) = 7680 qt/hr notice that I multiply by things that are the same top and bottom but different units 60 min = 1 hr 4 qt = 1 gal I do the numerator and denominator to make the units I want to get rid of cancel and leave the new ones that I ...
August 21, 2014

math - and so on?
You did not say what he charged per mile after 2 miles
August 21, 2014

life sciences
http://humanorigins.si.edu/evidence/human-fossils/species/australopithecus-sediba
August 21, 2014

Math
2 L + 2 w = 12 so L = 6-w area = A = L w L w = (6-w)w = A w^2 - 6 w = -A find vertex by completing square w^2 - 6 w + 9 = -A+9 (w-3) = -1(A-9) max at w = L =3 and area = 9 By the way, you could have guessed that our rectangle would turn out to be a square.
August 21, 2014

Math
(y-4)/(x-0) = (-1-4)/(1-0) (y-4 ) = -5 x y = -5 x + 4 now sketch a graph of that
August 21, 2014

ALGEBRA
12 marbles first draw 3/12 = 1/4 second draw 5/11 1/4 * 5/11 = 5/44
August 21, 2014

math
if p </= 30 , then c = 750 if p >30 then c = 20 (p -30) + 750
August 21, 2014

college algebra
A 1/12 pool / hr B 1/24 pool / hr together 3/24 pool/hr so 24/3 = 8 hr/pool
August 20, 2014

algebra
sketch a graph !!! looks like a straight line with slope = -1 to me
August 20, 2014

Math
two are already decide. You have two more flips. What is the chance of getting one heads and one tails out of those two flips ? You have four possibilities HH HT TH TT two of those four work, TH and HT so I get 1/2
August 20, 2014

physics
Try using these: https://answers.yahoo.com/question/index?qid=20081123194116AA3FxdL use that for the average speed and standard deviation. Then he range is so narrow I would assume a normal distribution and use that average and standard deviation in the normal table rather ...
August 20, 2014

calc
A = 2 x (a^2+x^2)^.5 dA/dx = 2 x (2x)(.5)(a^2+x^2)^-.5) + 2 (a^2+x^2)^.5 = 0 for max or min
August 20, 2014

static and dynamics
force down slope = m g sin 34 so friction force = force down slope if it is not accelerating down slope.
August 20, 2014

math
z 2 x y z + 2 + x + 7 = 13 z is even or z = 2 w 2w + 2 + x + 7 = 13 2 w + x = 4 x must also be even or 0 x = 0 then w = 1 if x = 2 then w = 1 so if x = 0 then w = 2 2227 4207
August 20, 2014

math
4915/72 =
August 20, 2014

math
40 + 20 = 60 60 - 28/7 = 60 - 4 = 56 56 + 30/5 = 56 + 6 = 62 62 - 3 = 59
August 20, 2014

algebra HUH??
meaningless
August 20, 2014

physics
Calculate pressure halfway up the wall p = 1000 kg/m^3 * 10 m/s^2 * 2 m thrust on one wall = p * area
August 20, 2014

physics what is side and length of bottom?
.2 m square or .1 m square on bottom? I will assume bottom square size s and depth h pressure = density * g * h if h is .5 m (it is not clear what depth of alcohol is from sloppy wording of question. It is the depth that matters, not how high the container is off the ground.) ...
August 20, 2014

Science
24 g of Mg is how many mols of Mg ? so How many mols of O ? (Hint: MgO has exactly as many mols of O as of Mg , note of O at 16 g/mol, not O2 at 32 g/mol) so mass of O = mols of O * 16 g/mol
August 20, 2014

Chemistry
True :)
August 20, 2014

Connexus
If it were condensed it would be a liquid, not a gas.
August 20, 2014

physics
F = G Me m/R^2 = approximately m g because G Me/R^2 is pretty much constant around earth surface 1/R^2 Toward the center of mass of the object that is pulling it, for example toward earth center.
August 20, 2014

physics/ basic of statics
3 kg weighs 3*9.8 = 29.4 Newtons 5 kg weighs 5*9.8 = 49 Newtons say the 49 N force is in the x axis direction tthe 29.4 N force is 60 degrees toward the Y axis Sum of x forces= 49+29.4cos 60 = 63.7 N Sum of y forces = 29.4 sin 60 = 25.5 N magnitude = sqrt(25.5^2 + 63.7^2) = 68...
August 19, 2014

Science
I take that back, both question can be asked and then hypothesis posed: http://www.sciencebob.com/sciencefair/scientificmethod.php
August 19, 2014

Science
pretty much, although usually the word "hypothesis" is used instead of question. One tends to pose a hypothesis, then test so see if it works.
August 19, 2014

math
Remember back when when you were learning addition you had the commutative property of addition which means 2 + 3 is the same as 3 + 2 Now you are getting the same property for multiplication :)
August 19, 2014

math
you just did. The property means that 8 * 7 is exactly the same as 7 * 8 In other words the two factors commute, you can change their order without changing their product. This will be true until you get to multiplying matrices.
August 19, 2014

math
P = (60 - 22) x - 75 = 38 x = 75
August 19, 2014

math
(x+h)^2 + 2 = x^2 + 2 x h + h^2 + 2 the are getting you ready to find the derivative which is the limit as h -->0 of [f(x+h) - f(x) ]/h which here would be limit as h -->0 of (2 x h + h^2)/h or 2 x + h as h -->0 is 2x which is df(x)/dx
August 19, 2014

science
density is mass per unit volume if the volume of steel is the same and the mass more then the density of the steel is more. (strange by the way)
August 19, 2014

physics
dv/dt = -1/t^2 v = (1/t) + c 3 = 1 + c c = 2 v = (1/t) + 2 if t = 4 v = 2.25
August 19, 2014

physics
dv/dt = -kv dv/v = - k dt ln v = - k t + c e^ln v = v = e^(-kt +c) = e^c e^(-kt) when t = 0, v = Vo Vo = e^c e^0 = e^c so v = Vo e^-kt
August 19, 2014

physics
2 seconds rising and 2 seconds falling h = (1/2)g t^2 falling 10 = (1/2) g (4) = 2 g g = 5 m/s^2
August 19, 2014

physics
it evidently goes forward a distance 3d then back a distance 2d to end up a displacoutup to be negative. deceleration phase out to 3 d t1 = time out to 3 d v = Vi + a t1 0 = Vi + a t1 so t1 = -Vi/a 3 d = Vi t1 + (1/2) a t1^2 3d = -Vi^2/a + .5 Vi^2/a = -.5Vi^2/a d a = -(1/6) Vi...
August 19, 2014

Language Arts
I can not see your italics but suspect it is the "ing" and D is correct. http://en.wiktionary.org/wiki/present_participle
August 19, 2014

math
5 y + 7 x = 31 x y 5 y + 7 x = 29 x y well, (0,0) would work but then we would be dividing by zero in the original.
August 19, 2014

English
"His questions revealed an intelligence" seems to be the main idea so what is the rest ? http://www.chompchomp.com/terms/relativeclause.htm
August 19, 2014

english
http://www.merriam-webster.com/dictionary/tally
August 19, 2014

P.E
I figure my natural crabbiness is likely to be fatal, perhaps even to me.
August 19, 2014

P.E
Certainly
August 19, 2014

english
Let me see: He spread the rumor widely. ------> He spread the rumor most widely ?
August 19, 2014

math
There are six numbers so add them all up and divide the sum by six.
August 19, 2014

Philippine history
http://www.academia.edu/4833169/Continued_Filipinization_in_the_Late_20th_Century_The_Case_of_the_Ateneo_de_Manila_University_1968-1991
August 19, 2014

Philippine history
http://prezi.com/cfw8l09tjkas/filipinization-policy/ When the US defeated the Spanish in the Spanish American War, the Philipines ceased to be a Spanish colony and came under the US. The US made an effort to let the indigenous people take over ruling their islands replacing ...
August 19, 2014

Physics
All I can do is tell you the method. call M1 the mass of the one that is on string at 50 degrees from vertical (aI assume from vertical Then gravity force down slope is M1 g cos 50 T is up slope net force down is (M1 g cos 50 -T) same deal for M2 net force down is (M2 g cos 30...
August 19, 2014

Physics
I do not understand this geometry. Is the big one trying to drop down a 53 deg slope and the little one being dragged up a 30 degree slope or what?
August 19, 2014

Physics
The table is three football fields long and three football fields high? I bet it was 0.15 seconds actually :)
August 19, 2014

Physics
big table :)
August 19, 2014

Physics
F = 20 * 9.8 m = 50 + 20 = 70 a = F/m = 2.8 m/s^2 force on falling 20 kg mass = 20 (9.8) - T = m a = 20(2.8) so T = 140 Newtons d = (1/2) a t^2 = (1/2) 2.8 (225) = 315 are you sure you did not mean 1.5 seconds?
August 19, 2014

science
probably at least on a cell scale.
August 19, 2014

Second law of motion
Net force up = 35 - 25 = 10 Newtons F = m a m = 25/9.8 = 2.55 kg so a = 10 / 2.55 = 3.92 m/s^2
August 19, 2014

Physics
Good grief, English units, have to put mass in slugs and use seconds and pounds and feet. (Back to freshman year in 1955) change in speed = 40 miles/ hr *5280 feet/mile * 1 hr/3600 seconds = 58.7 feet per second mass in slugs = 3000 lb /32 ft/s^2 = 93.8 slugs F = change in ...
August 19, 2014

Science
north velocity = 30 (assume west wind so blowing plane east) east velocity = 40 total speed = sqrt (30^2+40^2) = 50 km/hr tan angle east of north = 40/30 angle east of north = 53.1 or about northeast by east (NExE)
August 19, 2014

Physics
F down slope = m g sin 35 a = F/m = g sin 35 = 9.8 sin 35
August 19, 2014

math
a + a r + a r^2 + a r^3 + a r^4 ....+a r^(n-1) so a r = 1.5 a r^4 = .1875 a = 1.5/r (1.5/r) r^4 = .1875 r^3 = .125 r = .5 a = 1.5/.5 = 3 so 3 + 1.5 + .75 ......
August 19, 2014

science
Huh ?
August 19, 2014

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