Sunday
December 21, 2014

Posts by Damon


Total # Posts: 19,972

Social Studies
I thought I answered :) Looking at the link that Ms. Sue gave you, I think I answered correctly.
October 30, 2014

Social Studies
Oh, your answer to the Saratoga question is correct for sure.
October 30, 2014

Social Studies
I think c was true. I do not think more than half the colonists were Loyalists.
October 30, 2014

math
7 have black or brown total = 4+3+1+2 = 10 7/10 You can multiply top and bottom by 6 if you want, but no different :)
October 30, 2014

Calculus
3 * (x^10 - 1)^2 * 10 x^9 or 30 x^9 (x*10 - 1)^2
October 30, 2014

Algebra 2
20 x - 1 y = -200 25 x - 1 y = 0 D = -20 + 25 = 5 Dx = | -200 -1 | | +000 -1 | / 5 = 200/5 = 40 sign ? Dy = | 20 -200 | | 25 +000 | /5 = 5000/5 = 1000
October 29, 2014

Please help-algebra
yes
October 29, 2014

Please help-algebra
Jacqueline, please read the problem again.
October 29, 2014

Please help-algebra
no .15*number + 10 0.15 x + 10
October 29, 2014

Please help-algebra
Which do you think? 15 cents times the square feet plus a 10.00 trip fee
October 29, 2014

MATH FOR THE OFFICE
31 2/8 - 29 3/8 = 30 10/8 - 29 3/8 = 1 7/8
October 29, 2014

Math Help Please! ASAP!
no y + 5 >7 subtract 5 from both sides y > 2 The second one is right
October 29, 2014

Algebra: Answer Check
No, I do not think so, suspect typo in numerator. It should be possible to factor.
October 29, 2014

Algebra: Answer Check
-3*16 -8*5 + 2 +7 -48 -40 + 9 -88 + 9 -79
October 29, 2014

Physics
momentum east = 20*3 = 60 momentum north = 30 * 2 = 60 momentum east = 50*Ve = 60 momentum north = 50*Vn = 60 Ve = 6/5 Vn = 6/5 angle = 45 speed = (6/5) sqrt 2
October 29, 2014

physics
see the problem just above this one
October 29, 2014

Physics
F = m g sin 34 = 120 x x = (1/120)(3)(9.8) sin 34
October 29, 2014

Calculus
a) 973 + .0685 ( 81000 - 20000) b) T = .9 x c) L = 973 + .0685 (.9 x - 20000) d) 973 + .0685 (.9*90000 - 20000) same as a above
October 29, 2014

Calculus
tan T = h/60 d tan T /dt = dT/dt sec^2 T = (1/60)dh/dt dT/dt = (1/60) cos^2 T dh/dt tan T = 25/60 T = 22.6 deg so cos^2 T = .852 dT/dt = (1/60)(.852) (8) in radians !
October 29, 2014

Algebra
I got 1 -3 * 16 = -48 +5* 8 = 40 - -2 = 2 +7 = +1
October 28, 2014

math
about 3+3 = 6
October 27, 2014

Fluid Mechanics
You are welcome.
October 27, 2014

Fluid Mechanics
find the pressure at the bottom p = 1 atm + density * g * h 1 atm = about 10^5 pascals or Newtons/m^2 multiply the pressure by the area F = p A A = pi r^2 b) find the pressure halfway up the tank p = 1 atm + density * g * h/2 multiply that by the total area of the side of the ...
October 27, 2014

Physics need help
P V = n R T find n in V= 1 meter^3, then we will find molar mass later 1.51*10^5 * 1 = n *8.31 (273+0) n = 66.6 mols now a mol of CO has mass 12+16 = 28 grams = .028 Kg so we have .028 * 66 = 1.85 kg /m^3
October 27, 2014

Math Homework
x^2 + 2 x + 3 > 0 upward opening parabola (holds water) where is the vertex? complete square x^2 + 2 x = y - 3 x^2 + 2 x + 1 = y - 2 (x+1)^2 = y - 2 vertex at (-1 , 2) so y is never below y = 2 x^2 + 2 x + 3 > 2
October 27, 2014

Calculus: need clarification to where the #'s go
what is an mbox? V = (4/3) pi r^3 S = dV/dr = 4 pi r^2 dS/dr = 8 pi r so dS/dt = 8 pi r dr/dt now find dr/dt if dV/dt = 80 cm^3/s dV = S * dr = 4 pi r^2 dr so dV/dt = 4 pi r^2 dr/dt so dr/dt = ( 1/4 pi r^2 )dV/dt = (20/pi 14^2) so dS/dt = 8 pi 14 (20/14^2 pi) = 80/7 =
October 27, 2014

algebra 2
c = m d + b 1.7 = 2 m + b 3.7 = 7 m + b =================== -2 = -5 m m = 2/5 so c = (2/5) d + b 1.7 = (2/5)2 + b b = 1.7 - .8 = .9 so c = (2/5) d + 9/10 or 10 c = 4 d + 9
October 26, 2014

Math
yes yes
October 26, 2014

Algebra
The function is undefined for x = 1 (x = 1 is not in the domain but otherwise all real x) but the range is from -oo < y < +oo
October 26, 2014

calculus
f(x) = 5/x f(x+h) = 5/(x+h) [f(x+h) - f(x) ]/h = [5/x+h) -5/x]/h = 5[ x - (x+h) ] /(x^2+xh)h =5 [ -h ] /(x^2+xh)h = -5/(x^2+xh) ======================== if you want use x = 4 right now = -5/(4^2 + 4 h) let h-->0 = -5/16 ======================== I would continue though let h...
October 26, 2014

calculus
here for example: http://www.sosmath.com/calculus/diff/der00/der00.html
October 26, 2014

typo
f(x) is a function of x or is it 5/8? the slope for part b is the definition of the derivative in beginning calculus. You are not supposed to know that but google it and the result will show you how to find the limit of: [ f(x+h) - f(x) ] / h as h -->0
October 26, 2014

differential equation
dA/dt = k(M-A) - cA dA/dt = k M - kA - c A but k - c is a constant call it r dA/dt = kM- rA dA/dt +rA = k M = constant for this case of M
October 26, 2014

math/limits
(x-3) / [ (x-3)(x+3) = 1/(x+3) so when x is 3 1/6
October 25, 2014

math/limits
You mean???? [(14+y)^2 - 14^2 ] / y ???? if so [ (14+y-14)(1+y+14)] / y y (y+15)/ y y+15 as y--->0 15
October 25, 2014

College Algebra
First draw the picture, center at (0,0) and radius = 5 You see that point in Quadrant 3? It makes a triangle with the -y axis hypotenuse 5, bottom 3, 4 down y axis Now draw the tangent to the circle at that point. It will be perpendicular to the radius at that point. Since the...
October 25, 2014

Math
v^3 = 5.8^3 vsphere = (4/3) pi (5.3/2)^3 subtract
October 25, 2014

physics
G Me m /r^2
October 25, 2014

csci 120
f(t) = initial balance ( 1 + r )^t where r = yearly interest percent/100 t is time in integer years after deposit
October 25, 2014

physics
m g = 690 mg - 1000 kg/m^3 * V g = 36 1000 V g = 690 - 36 = 654 N g = 9.8 so V = 654/(1000 g) rho = m/V = 690/g / .654/g = 1055 kg/m^3 just a little heavier than water (must have expelled all air from her lungs to sink like that)
October 25, 2014

Physics
friction work done = ke lost = (1/2)m v^2 force = .7 m g = .7 * 66 * 9.8 mass = 66 a = F/m = .7 * 9.8 = 6.86 m/s^2 0 = 4.4 - 6.86 t t = .641 seconds average speed = 2.2 m/s distance = 2.2 * .641 = 1.41 meters
October 25, 2014

Calculus
and also draw a picture of the circle of radius 2 and center at (0,0) so you get an idea what is going on.
October 24, 2014

physics
(1/2) m v^2 = m g h so v1 = -sqrt(2 g h) (coming down) h = -2.87 coming down going up same deal but opposite sign for v v2 = + sqrt(2*9.8*1.12) change in momentum = m (v2-v1)
October 24, 2014

Algebra Slope Intercept Form
slope is -6/2 = -3 look at what Steve did He did it exactly the way I did your last problem!
October 23, 2014

Algebra Slope Intercept Form
see http://www.jiskha.com/display.cgi?id=1414100500 exactly the same procedure.
October 23, 2014

math
2 pints then is 4 cups that is 8 half cups
October 23, 2014

Trig/Pre-Calc...
That is interesting, a little tailwind helps but a lot hurts. also zero has an effect? why? anyway if s = 3 t = .0119 *9 - .308 *3 - .0003 t = +.1071 - .924 - .0003 t = -.8172 seconds (wow, a lot) = -.82 rounded
October 23, 2014

Math
No if x = 2 y = 20 * 2 + 10 y = 40 + 10 y = 50
October 23, 2014

Math
to graph it use any two points on the line if x = 0 , y = 10 so (0,10) is one point if x = 532, y = 20*532 + 10 = 10,650 so (532 , 10,650) is a point take ruler and draw line through those points (I would suggest using like x = 5 instead of 532)
October 23, 2014

Algebra Slope Intercept Form
change in y/change in x = -2/7 = m so y = (-2/7) x + b put in any old point from the table, like (0,-1) -1 = 0 + b so y = (-2/7) x - 1 or 7 y = -2 x - 7
October 23, 2014

Language Arts HELP!
B is the only sentence in the list that is English.
October 23, 2014

math
1 gallon = 231 in^3 37 * 10 * 12.5 in^3 (1 gal / 231 in^3) = 20 gallons
October 23, 2014

Finance
You mean you just deposited once with 27K ? If so amount = 27,000 (1.11)^20 = 27,000 (8.062311536) = 217,682.41 gee, I agree to the penny wonderful stuff that compounding :)
October 23, 2014

Math 12
The main reason for giving appreciated stock to a charity is to avoid paying any capital gains tax on the stock. but anyway paid 100 * 10 = 1,000 for stock it was worth 100 N when granted got a refund of .6(100 N) = 60 N paid tax = .2(100 N - 1,000) so 60 N - (20 N - 200) = 1...
October 23, 2014

ap calc
oh, the first one is always v positive v = 2t+2 so when does the second one go - ?
October 23, 2014

ap calc more on d
they both start out + find out when the first one hits v = 0 then it goes - while the first is + find when the second hits v=0 then they both are - etc
October 23, 2014

ap calc
b) find the velocity of each when t = 8 v1 = 2(8)+2 = + 18 v2 = -2t +8 = -8 so in opposite directions d ) they start out both moving + when is v1-v2 = 0 ?
October 23, 2014

physics
vertical problem first Vi = 9.52 sin 24.4 v = Vi - 9.8 t at top v = 0 so 9.8 t = 9.52 sin 24.4 = 3.93 t = .401 seconds to top height h = Vi t - 4.9 t^2 h = 3.93 (.401) - 4.9(.401)^2 h = .789 m now the horizontal problem time = 2 t = .802 seconds because he spends as much time ...
October 23, 2014

Algebra
slope = -1/5 y = -(1/5)x + b -1 = -3/5 + b b = -2/5 so y = -(1/5)x -2/5 or 5 y = -x -2
October 22, 2014

PHYSICS
I initial = 4.90 + .565^2 (4.95*2) = 4.90 + .319 (9.9) = 4.90 + 3.16 = 8.06 Ifinal = 4.90 + .2^2(9.9) = 4.90 + .396 = 5.30 oh my, much less angular momentum initial and final = I omega1 = 8.06*2.8 = 22.6 (answer A) = 5.3*omega2 so omega 2 = 22.6/5.3 = 4.26 rad/s Now I think ...
October 22, 2014

physics Damon???
(i) half (it arrives randomly polarized. The first filter takes out all the x components for example) (ii) None. The x components go out with the first filter. The second filter takes out the y components :) (iii)http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/polcross.html ...
October 22, 2014

Algebra 2
Assuming you are not allowed to use calculus, complete the square to find the vertex. x^2 + 12 x = y-5 x^2 + 12 x + 6^2 = y - 5 + 6^2 (x+6)^2 = y + 31 vertex at x = -6, y = -31 so never smaller than -31
October 22, 2014

physics
You are welcome.
October 22, 2014

physics
it would have to be 8 times as thick 64 cm (pretty thick :)
October 22, 2014

science
http://curious.astro.cornell.edu/question.php?number=300 Note that if you are in the Northern hemisphere You can see stars that are high in the northern sky all year. It is the ones close to the plane of the earth's orbit that you can only see when you are facing them at ...
October 22, 2014

Sorry
mistook / for times (bottom*derivative of top - top * derivative of bottom)/bottom^2 (x)/(2+x)= = [(x+2)(1)-x(1) /(x+2)^2 = [ x+2 -x ] /(x+2)2 = 2/(x+2)^2
October 22, 2014

Derivatives
(2+x) d/dx (x) + x d/dx (2+x) (2 + x) + x(1) 2 + 2 x 2(x+1)
October 22, 2014

physics
6.3 * sin 34 = 3.52 meters up m g h = 13.2 * 9.81 * 3.52 = 456 so I get -456 J I think you reversed digits
October 22, 2014

physics...damon please help
delta L/L = k delta T delta L/L = 6.7*10^-6 inches/inch degree F (117 deg F) L = 10 meters =394 inches so delta L = 394 * 6.7 *10^-6 * 117 = .309 inches = .784 cm = .0784 meters
October 22, 2014

COLLEGE PHYSICS
|v1| = 2|v2| v1^2 = 4 v2^2 so Ke v1 = 4 Ke v2 so 5 Ke2 = 7500 J so Ke2 = 1500 J and Ke1 = 6000 J
October 22, 2014

Trig ?
I do not understand your symbols, do not have whatever font you are using. I assume this is some kind of a phase shift in the argument of the cotangent.
October 22, 2014

physics
17 = (1/2) 1.9 t^2 solve for t v = 1.9 t
October 22, 2014

Math
II. When calculating interest , you need too ______? (1pt) a. Change the percentage to a decimal then multiply the decimal against the amount. --------------------------------- VIII .0450 - .0375 = .0075 .0075 * 1000 = 7.50 or answer c BUT this assumes interest PER MONTH (very...
October 22, 2014

Algebra 1 ?????
do you mean -2/5x - 9 < 9/10 ??? or (-2/5)(x - 9) < 9/10 or -2/(5x - 9 )< 9/10 or -2/[5(x - 9)] < 9/10 or what ?
October 22, 2014

math
You mean he checked 25 wheels ????? If so then what times 4 + what times 3 = 25? 1*4 + 21 sure 1*4 + 7*3 2*4 + 17 nope 3*4 + 13 nope 4*4 + 9 sure 4*4 + 3*3 4*5 + 5 nope 4*6 + 1 nope
October 21, 2014

math
1.65 * 100 = 165
October 21, 2014

Precalculus
PLEASE PROOF READ - I assume you mean 2.2ft. / HOUR a) A = pi r^2 b) 2.2 t c) 2.2 * 2 2.2 * 2.5 d)A(2) = pi * (4.4)*2 A(2.5) = pi (5.5)^2 e) A(t) = pi (2.2 t)^2 f) A(2) = pi (2.2*2)^2 A(2.5) = pi (2.2*2.5)^2 g) [ A(2.5) -A(2) ]/.5 h) [A(7.)-A(5)]/ 2.5 i) you will see that it ...
October 21, 2014

precalculus
A = Ai e^kt 2 = e^3k 3 k = ln 2 k = .231 30 = e^(.231 t) ln 30 = .231 t t = 14.7 hours
October 21, 2014

precalculus
already did this above
October 21, 2014

algebra
note a may not be 10 or -4 or the problem is undefined (zero denominator)
October 21, 2014

algebra
(a+10)/(a+4) by dividing top and bottom by (a-10)
October 21, 2014

Physics
4.63 * 4.10 work "in" in x direction -3.79 * 3.86 work "out" in y direction (braking) 2.16 * -2.45 work "out" in z direction now just add the results (not a vector) 4.63 * 4.10 - 3.79 * 3.86 - 2.16 * 2.45 Joules (scalar but does have sign)
October 21, 2014

math
Oh, I misunderstood question I think.
October 21, 2014

math
72 min and 75 min (common multiple?) 72 = 12 * 6 = 3*3 *2*2*2 75 = 5*5*3 so we need 25 * 3 * 8 = 600 minutes = 10 hours
October 21, 2014

Physics
just did it below kinetic energy at bottom = potential energy at top
October 21, 2014

Physics
m g h = (1/2) m v^2 v^2 = 2 g h v = sqrt (2 g h) h = 3.27 (1 - cos 35.6) meters g = 9.8 m/s^2
October 21, 2014

Physics
work done by gravity = change in potential energy in falling from initial height h = L (1-cos theta) h = .8 (1 - cos 40.4) so work=m g h = 2.63*9.8*.8 (1 - cos 40.4)
October 21, 2014

Physics
2275 = 207.8 t +(1/2)15.6 t^2 solve quadratic for t then v = 207.8 + 15.6 t
October 21, 2014

Physics
d = Vo t + (1/2) a t^2 219 = 0 + 2.3 t^2 solve for t v = Vo + a t v = 0 + 4.6 t
October 21, 2014

Physics
here for example Vo = 14.8 a = 11.3 ft/s^2 t = 6.6 sd v = Vo + a t so v = 14.8 + 11.3 * 6.6 = 89.4 feet/second
October 21, 2014

Physics
http://hyperphysics.phy-astr.gsu.edu/hbase/mot.html You want the box labeled: "Description of motion in one dimension"
October 21, 2014

inequalities
10x -20 + 11 < 10 -12 + 2x 8 x < 7 x < 7/8
October 21, 2014

Note
0 = Vo - a t ignore that line, final speed is not zero and is not needed
October 21, 2014

please help! physics
95 km/hr *1000/3600 = 26.4 m/s in .5 seconds moves 13.2 meters then a = F/m = -2400/1200 = - 2 m/s^2 0 = Vo - a t d = 13.2 + 26.4 t - (1/2) (2) t^2 t = 2 so d = 13.2 + 48.8 = 62 meters d = 13.2 +
October 21, 2014

Physics
at bottom v = sqrt (2 g h)
October 21, 2014

science
They are all gasses but the most dense of the bunch is ethyne (Acetylene)
October 21, 2014

physic
Vi = 28 sin 60 =24.25 m/s v = Vi - 9.8 t h = Vi t - 4.9 t^2 = 24.25(3.3) - 4.9(3.3)^2 = 26.7 meters high not 29.2 when does v = 0 (top of arc)? 0 = 24.25 - 9.8 t t = 2.47 seconds so h at top = 24.25(2.47) - 4.9 (2.47)^2
October 21, 2014

Physics
m v^2/r = 1630 * (13.9)^2/385 b) I do not know what is holding your vehicle in the circle !!!! If on a string - tension force If held in a big cylinderical rotating can (carnival ride) - normal force If on a flat curving road - friction on the tires If in orbit in space - ...
October 21, 2014

math
I (we) did not use any resources such as the web or books other than our textbook. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; and you want me to work on it ?
October 19, 2014

Physics
Total momentum = 0 Mb*2.2 - Me*2.9 = 0 Mb/Me = +2.9/2.2 the ratio of masses is unlikely to be negative and I think you have it upside down.
October 19, 2014

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