# Posts by Damon

Total # Posts: 29,993

agree agree

Math
You are welcome.

Math

typo?
no way it is 1010 feet wide assuming you mean about 10 feet and d is 80.8 (or is it 808 ?) surely not a mile and a half pi d = about 3*81 = about250 pi d* 10 = about 2500

math
x yellow 12 - x green first draw x/12 second draw (x-1)/11 so both (x^2-x)/132 = 5/33 33(x^2-x) = 660 x^2 - x - 20 = 0 (x-5)(x+4) = 0 x = 5 because it is hard to visualize a negative yellow marble

math
brown, 9 x black, 4 x white, 8 x = 16 so x = 2 18 + 8 + 16

Calculus applications
Now you want the max moment and where the moment will be max where its derivative, the shear, is zero S = w (L/2 - x) = 0 so the moment is max where x = L/2, the middle of course How much is it? M = w (L^2/4 -L^2/8) = wL^2/8 which is wl (L/8) which is the weight * L/8

Calculuhttp://www.jiskha.com/display.cgi?id=1480944543s applications
Calculus applications - Damon, Monday, December 5, 2016 at 9:24am If you want to draw it it is a seesaw with no one on it w pounds per foot of weight down (+) and a force up of wL = total weight at center :) Note that moment must be zero at both ends and will be maximum at the...

Calculus applications
first go here http://www.jiskha.com/display.cgi?id=1480944543

Math
749 is bigger than 500 so 123,166---> 123,167 123,167,000

Algebra
3x+2y=34 x+y = 15 so y = 15-x 3x +2(15-x) = 34 3x + 30 -2x = 34 x = 4 y = 11

which do you guess?
NOT B

Algebra 2
I bet you mean x^2 + y^2 = 16 well we could do it right or we could cheat and say we want a circle with center at (-8 ,-3) (x+3)^2 + (y+3)^2 = 4^2

You are welcome.

you want 22 characters? 733.166666666666666666

well, I know 6*7 = 42 so 6*700 = 4200 but 6*800 is too big so use 700 and then we have 4399-4200 = 199 left over 6* 30 = 180 so use 30 and I now have 730 and 19 left over 6*3 = 118 so use 3 and I now have 733 and one left over so 733 1/6 733 with a remainder of one

NO
You do not have 49 teachers!

VERY, VERY URGENT 4TH GRADE MATH!!!!!!!!!!!!!!!!!!
so 6 groups of 7 would require 42 teachers but 7 groups of 7 needs 49

VERY, VERY URGENT 4TH GRADE MATH!!!!!!!!!!!!!!!!!!
Hurry please, I am waiting on pins and needles. I know that 7*6 is around 42 and 7*7 is about 49

MATH URGENT!!!!!
slope 1 = (3-3)/(4-0) = 0 slope 2 = 2 2-0 = 2

wait a minute
it PRODUCES 150 J of heat? Usually one must put heat into an engine to get work out (boil water, burn gas). This is either a typo or a magic trick.

Physics
100(work out/heat in) the heat out to the other system is lost to this problem. Note that it is 110 which is what is left over after you take 40 out of your 150 see http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heaeng.html

whoops
cos x =cos 2x cos 2x = cos^2x -sin^2 x where does cos^2x -(1-cos^2x) =cos x cos x = 2 cos^2x-1 2 cos^2x -cos x - 1 = 0 (2 cos x +1)(cos x -1) = 0 cos x = 1 or cos x = -1/2 x = 0 or 2 pi n or x = 2 pi/3 +2 pi n

Calc
why do you think the domain is from -pi to 3pi ? I think it is all real x df/dx = 2 cos x -2 cos 2x (hoping you did not mean sin^2x) at 7 pi 2sin 7pi = 0 in fact sin any number of pis is zero so we are looking for where the slope is 0 that is where cos x = cos2x well, that is ...

what do you mean?
What you typed y = a(x - h)2 + k, a ? 0 a line with slope 2a and y intercept 2 a h + k is VERY different from y = a(x - h)^2 + k, a ? 0 a parabola with vertex at (h,k) and upright (holds water)

precalculus
x 7-4 = 3 and directrix is above vertex (sheds water) so a = -3 (x+2)^2 =-4*3 (y-4)^2 = -12(y-4)^2 =

you do this one
Hey, I did the other one

wait a minute
I did the other one, you can find the x component of your speed around the circle.

Calculus 1
f(x,y) = x^3y^2 df = (df/dx) dx + (df/dy) dy df/dt=(df/dx) dx/dt + (df/dy) dy/dt but f is a constant = 2916 df/dx = 3x^2y^2 = 3*81*4= 972 df/dy = 2x^3y = 2*729*2= 2916 so 0 = 972 (dx/dt) + 2916 (2) dx/dt = -6

Math
y = cos (x)+ 3 x interchange x = cos y + 3 y if y = 0, x = 1 + 0 x' = -sin y + 3 but y = 0 at x = 1 dx/dy = 3 dy/dx = 1/3

Math
remember 1 worked for y, so not it works for x :)

Math
dy/dx = 5 x^4 + 6 x^2 + 1 but x is 1 here we know already dy/dx = 5+6 + 1 = 12 interchange dy/dx = 1/12

try interchanging x and y
y = x^5 + 2 x^3 + x - 1 exchange x and y x = y^5 + 2 y^2 + y - 1 now use 3 for x 4 = y^5 + 2 y^2 + y 1 works for y

Vectors
|a| = sqrt(3^2+4^2) about 5 I think. Now you do the other. Remember when you square a negative you get a positive.

Calculus applications
You are welcome.

correction
the shear, not the moment, changes instantly at the center

Calculus applications
If you want to draw it it is a seesaw with no one on it w pounds per foot of weight down (+) and a force up of wL = total weight at center :) Note that moment must be zero at both ends and will be maximum at the middle changing signs instantaneously M = w L (x/2) - w x^2/2 S...

science
ahh, which comes out to zero if he is not accelerating up or down :)

science
1500 * 9.8 Newtons down and if he is sitting quietly 1500* 9.8 N up from the ice on his frozen fur.

Like ALWAYS
Momentum after = Momentum before. Even when you get to relativity !

Science Physics
There is one thing you can really count on, Newton's First Law. If there is no external force on a system, the momentum remains CONSTANT Momentum before = Momentum after. If I could underline that PERIOD I would do so. You can not count on mechanical energy being the same ...

Math
w + L = 108 L = w + 30 so w + w + 30 = 108

physics
F = m a F = 3kg* 5m/s^2 = 15 Newtons a = F/m a = 15N/12.2kg a = 1.23 m/s^2

statistics
http://davidmlane.com/hyperstat/z_table.html

yes, two 2s and a 3 yes, 420 * 3

pre calculus
http://www.jiskha.com/display.cgi?id=1480860809

Calculus
see the rope and the boat problem below.

Calculus
h height above bow (constant=7) y hor distance to bow (25 at moment) x = our rope length x^2 = h^2 + y^2 2 x dx = 0 + 2ydy dy/dx = x/y dy/dt = dy/dx dx/dt = 2 (x/y) x = sqrt (7^2 + 25^2) = 26 so dy/dt = 2 (26/25) = 2.08 m/s

Calculus
hint dA = 2 pi r dr so dA/dr = 2 pi r and dA/dt = dA/dr * dr/dt

18+273 = 291 K 0 + 273 = 273 K P V = n R T 103 * 23 = n R *291 n R = 103*23/291 same n R later 101 V = n R 273 V = n R (273/101cm^3) V = (103*23/291)(273/101) cm^3 22 cm^3 = .0022 Liters = 22*10^-6m^3 ================================== P V = n R T 101325 (22.4 liters)(1m^3/...

Sequence and serice
54/100 or 27/50 a rational number is any one that can be expressed as a ratio of whole numbers.

maths
2n + 24/6 = 25/6 n = 1/12

pre calculus
2 1 2 4 2 2 0 5 2-1 6 2 1 0 2 3/2 0 1-2 1 0 0 0 0 (3/2, 1, 0)

pre calculus
http://www.gregthatcher.com/Mathematics/GaussJordan.aspx

Maths
The diagonal sqrt(24^2 + 18^2)

Where are you stuck?
So what did you do?

Math
(1/2)(40 + 3/8) = 20 + 3/16 20 3/16

Math
2/12 = 1/6 24 * 1/6 = 4 or 12/24 = 2/x 12 x = 48 x = 4 or the original width was twice the length twice 2 is 4

Math
Then count the number of one inch by one inch square boxes. You will get 50 of them, 5 times 10 :)

Math
Because to find the area of a rectangle you multiply the length by the width. To figure out why, draw a picture 10 inches by 5 inches and divide it up into columns one inch wide and rows inch high.

Math
yes, multiply

CSC
(2s-44)+(s+22)+ s = 5858 4 s -22 = 5858 4 s = 5880 s = 1470 etc

Physics
vertical problem Vi = 25.8 sin 20 = 8.824 m/s v = Vi - 9.81 t at top v = 0 t = 8.824/9.81 = .900 seconds at top (therefore 1.8 seconds in air by the way) h = Vi t - (9.81/2) t^2 = 8.824(.9) - 4.9(.81) = 7.94 - 3.97 = 3.97 meters high horizontal problem u = 25.8 cos 20 = 24.2 ...

Math
multiplying by 5/2 should not give the same answer as multiplying by 2/5(which is dividing by 5/2)

Math
21 7/8 * 2 1/2 one way is to use distributive property (21 + 7/8)(2 + 1/2) =(2 + 1/2)(21) +(2 + 1/2)(7/8) = 42 + 21/2 + 7/4 + 7/16 = 42 + 168/16 + 28/16 + 7/16 = 42 + 203/16 = 42 + 12 + 11/16 = 54 11/16

Physics
yes,your table is for a = dv/dt = 4 so dv = 4 * dt dv/dt = a = 4 v = a t = 4 t x = (1/2) a t^2 t a v x 0 4 0 0 1 4 4 2 2 4 8 8 3 4 12 18 4 4 16 32 5 4 20 50 It is that v column you want, how far it moves PER SECOND not how far it moved total.

Physics
so dx/dt = a t dx = a t dt at t = 0, dx = 0 at t = 1, dx = a at t = 2, dx = 2a at t = 3, dx = 3a at t = 4, dx = 4a etc in other words you are looking at v(t), the velocity, which is linear with time (the CHANGE in position, not the position) v = a t the POSITION itself will be...

College Calc
sqrt 576 = 24 24*4 = 96

College Calc
LOL,square min P, given A A = L w so L = A/w P =2L+2w P = 2A/w + 2 w 2 w^2 - w P = -2 A w^2 -(P/2)w = A w^2 -P/2 w + P^2/16 = -A + P^2/16 (w-P/4)^2 = -(1/16)(16A-P^2) vertex when w = P/4 (that is a square :) Area = P^2/16 = (P/4)^2 of course P given, max A A = L w P =2L+2w so ...

Physics
R is speed of rain r is angle of rain to vertical horizontal rain we see = Rsinr+bike speed vertical rain we see = R cos r case 1 hor = R sin r + 20 ver = R cos r tan 45 = (R sin r +20) /Rcos r case 2 tan 19deg48 min = (R sinr +12)/R cos r

Algebra
It is as if she got 89 on 5 of the 6 tests! (89*5 + x)/6

Physics
http://formulas.tutorvista.com/physics/doppler-shift-formula.html

Physics
As the ambulance approaches, the pedestrian will hear a higher frequency. As it recedes a lower frequency. Add the absolute values of the changes. For the formula, Google Doppler shift (classical not relativistic)

chemistry
4/2 = 2 mols of CO2 for every mol of C2H6 mol of C2H6 = 2*12+6 = 30 g mol of CO2 = 12+32 = 44 g 7500 * 2 * 44/30

history knowledge
I guess I would have to go along with that but wonder if it would have lasted if he had lived. The last few years of scooting around the Middle East and western Asia did not seem to be aimed at establishing any sort of permanent government but rather putting people in titular ...

Physics
Fup = m (9.81 + v^2/R) 2*265 = 30 (9.81+v^2/1.4) (b) 2*265 up assuming the seat has no mass :)

Math
55% is Cu and FE so 45% is zinc .45 *720 = 324 grams That is assuming this is a MATH, not a Chemistry problem. If it were Chemistry they might be looking at 1/4 of the molecules are Cu, not 1/4 of the mass.

Math
2^n

Math
5(.07)(8000)=2800

Calculus
Yes, of course -4-1 = -5 :)

Calculus
where do they hit? 4 x^2 = 45 - x^2 x^2 = 9 x = +/- 3 cylinder height = 45-x^2 - 4 x^2 = 45 - 5 x^2 cylinder thickness = dx cylinder circumference = 2 pi x so V=?[0,3]2 pi x(45-5x^2)dx

So what?

physics
Vertical problem: at max height (half the trip) 600 = Vi t - .5*9.8 t^2 .5*9.8 t^2 - Vi t + 600 = 0 also v = 0 so 0 = Vi -gt t = Vi/g = Vi/9.8 so .5*9.8(Vi^2/9.8^2) - Vi^2/9.8 +600 = 0 600 = .5*VI^2/9.8 Vi = 108 m/s initial up speed t = rising time = 108/9.8 = 11.1 s total ...

Finite Math
A (1.0465)^6 = 15,000 A = 15,000/1.313516 = 11,419.73

physics
Ke = (1/2)(1260)(14.8^2) Joules go ahead and integrate m a dx if you want but energy is a lot easier.

Physics
total weight = (251+350)(9.81) + rhogas 9.81(4/3) pi (9.5)^3 where rhogas is the mass per unit volume of the gas in the balloon weight must = weight of air displaced = rhoout g (4/3)pi(9.5)^3 rho gas = kg/mol * n = .029 n where n is mols in PV =nRT T = 273 + T that we want rho...

Pressure in Physics
60 *9.81/10 N/m^2 or Pascals if you mean on the floor on earth and 10 is the floor area

maths
2 pi Ro = 44 solve for Ro then Ri = Ro - 2 so inner circumference = 2 pi Ri and Path area = pi(Ro^2-Ri^2)

math
16 = 4*4 12 =4*3 so 4*4*3 is LCM = 48 of each 3 packs HD 4 packs buns

Physics
google Bernoulli constant= v^2/2 + g z + p/rho in your units v in m/s p in Pascals(N/m^2) rho = 1000 kg/m^3 for water g about 9.8 v at bottom = 1.2 m/s v at top = 2 v at bottom =2.4 m/s z at top = z at bottom + .2 meters p/rho bottom =143000/1000 so 2.4^2/2 + 9.8(.2)+ 143 = 1....

Math
B yes C 128(0.5)^3 128*.125 = 16 yes D 128*.5^8 = 128* .00390525 = 0.5 YES !!!!!

Math
Gabby drove t-3 hours she drove 2 hours so t-3 = 2 and Ryan drove 5 hours D = Ryan speed * 5 D = Gabby speed * 2 so 5 R = 2 G but G = R+42 so 5 R = 2(R+42) 3 R = 84 R = 84/3 = 28 HUY - The DIFFERENCE is 42

Calculus 1
v = x^3 dv/dx = 3 x^2 dv/dt = dx/dt * dv/dx dv/dt = 4 * 3(121) cm^3/s

math
1000-850 = 150 interest 150 = 850 (.08) t

Pre-Calculus
satellite position is likely to be x, y , z of t :)

science
1. I disagree with you. People just assumed we were at the center. Partly religious 2. agree 3. agree 4. I agree with you. A and B are obvious. D is the sun and moon working together to produce spring tides when the moon is full and new and neap tides when the moon s half moon...

Algebra
v = dh/dt = 32 -32 t at top, v = 0 t = 1 h = 9+16 = 25 ====================== now with algebra 16 t^2 -32 t =9 - h complete square t^2 -2 t = (-1/16)(h - 9) t^2-2t+1 = (-1/16)(h - 9)+16/16 (t-1)^2 = -(1/16)( h-25) t = 1, h=25 same answer

precalculus
1 x +1 y = 2 1 x +1 y = 3 1 1 2 1 1 3 subtract top one from this 1 1 2 0 0 1 oh my! 0x+0y=1 ?

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