Monday
December 22, 2014

Posts by Damon


Total # Posts: 20,000

History
The farmers got caught in a cycle of debt because it says they did not have capital to buy land and therefore I suspect they had to borrow.
August 5, 2014

physical
LOL !!! This is a trick question. You know the answer. It is exactly the same as throwing a ball straight up. It takes just as long to go up (0 = Vi - g t) so t = Vi/g h = Vi t - (1/2) g t^2 as it takes to go down 0 = h - (1/2) g t^2 = Vi t - (1/2) g t^2 - (1/2) g t^2 t = Vi...
August 5, 2014

English/ Help
Now what about A? Who misunderstood what? Did they think he was Darth Vader when he was actually Luke S? Now what about B? Was there milling around and people stepping on others' toes trying to get selfies and autographs? Now what about C? Who left. I might have but I was ...
August 5, 2014

English/ Help
http://www.jiskha.com/display.cgi?id=1407196486
August 5, 2014

English/ Help
Could swear I have seen this question before.
August 5, 2014

college physics
omega = initial omega + alpha * t if alpha is constant and it starts from rest t = omega/alpha
August 5, 2014

math
C = 9000 + 21 x yes Revenue = R = 49 x P = 49 x - 21 x - 9000 so P = 28 x - 9000 now for some reason they did not asdk how ma tires must be sold to break even but it would be P = 0 28 x = 9000 x = 9000/28
August 4, 2014

Algebra
Your notation is extremely awkward. We normally write x to a power as x^power like x^3 is x cubed Now I will do it your way but you have errors starting with the sign in the first line x(2x squared-x-3)+ 1(2x squared-x-3) should be x(2x squared-x-3) - 1(2x squared-x-3) then x*...
August 4, 2014

Algebra
again: http://www.jiskha.com/display.cgi?id=1407198511
August 4, 2014

Algebra
Did I not just do that ?
August 4, 2014

English/ Help
hmmmm ..... each pointed to their records of service and academic excellence.
August 4, 2014

Pre-College Algebra
distributive property: x * (2x^2 - x- 3) -1* (2x^2 - x- 3) = 2 x^3 - x^2 - 3 x - 2 x^2 + x + 3 combine like terms = 2 x^3 - 3 x^2 - 2 x + 3
August 4, 2014

math test review
h^2 + 64(2) = 18^2 = 324 h^2 = 196 h = 14 area = (1/2)(8sqrt 2)(14) =56 sqrt 2
August 4, 2014

Physics
You are welcome.
August 4, 2014

Physics
Stand on a scale and push on the ceiling :) Third law. Force by man up on bars --> force down on man Sum forces on the man who is not accelerating up or down m g down + handlebar force down force up on man = pedal force net force = 0 so no change of momentum (F = m a = 0) ...
August 4, 2014

English/ Help
I agree with you but I was a physics major :) C and D are just plain wrong. The car, not the fuel efficiency, is designed :)
August 4, 2014

math hw
all multiples of 6 are even and multiples of 3 Venn diagram (intersection is mult of 6) n are multiples of 6 22 - n are even only 15 - n are 3 only (22- n) + n + (15-n) = 30 37 - n = 30 n = 7
August 4, 2014

math hw
Hey (a^2-b^2)= (a+b)(a-b) remember forever (a+b)(a-b) = 20 2(a-b) = 20 a - b = 10
August 4, 2014

math
g = 2 b - 5 so yes, but they said b for boys
August 4, 2014

physics
You also need specific heat of iron and melting point Watch your units, grams or kg , Joules or calories to get up to Tmelt heat = 1000 g * specific heat iron in Joules/gram deg C *(Tm-20) to melt heat = 1000g * 33 J/g
August 4, 2014

Calculus
y = x^.5 y' = .5 x^-.5 sketching this I am going to reverse slope equation y' at tangent = m = (y-yo) /( x-xo) = .5x^-.5 y' = m = (y-0)/(x+16) = .5 x^-.5 x^.5 /(x+16) = .5 x^-.5 x/(x+16) = .5 x = .5 x + 8 .5 x = 8 x = 16 so the tangent hits the curve at x = 16 ...
August 4, 2014

physics
do vertical problem find Vi, initial speed up Vi = 65.2 sin 34.5 find t where v = 0, top of curve v = Vi - 9.81 t 0 = Vi - 9.81 t solve for t, time at top, half the time in the air max height h = 0 + Vi t - 4.9 t^2 now horizontal problem u = 65.2 * cos 34.5 the whole time ...
August 4, 2014

English/ Help
Unfortunately copy and paste does not work here and I do not see the original sentence.
August 4, 2014

Math
If you have not had FOIL, use distributive property v(v+3) - 5(v+3) = v^2 + 3 v - 5 v - 15 = v^2 - 2 v - 15 FOIL is for doing these First, Outer, Inner, Last v*v + v*3 - 5*v - 5*3
August 4, 2014

Math 221
no anything to the -3 is one over anything^3 so 1/(-4)^3 1/[ -4*-4*-4 ] 1/ -64 -1/64
August 4, 2014

Math 221
when you have more than one term in a numerator or denominator, put a parenthesis around them a + b/c is just that , a alone plus b/c but (a+b) / c is a+b ----- c or a/c + b/c
August 4, 2014

Math 221
Go with my original reply then. I had a hunch that was the case because both 24 and 15 were divisible by 3.
August 4, 2014

Math 221
ok if you really mean that. I had a hunch it looked like 24x^5-15x^4 ------------ 3x^2 but if you really mean 24 x^5 - (15 x^4/3 x^2) then 24 x^5 - 5 x^2
August 4, 2014

Math 221
Be careful with numerators and denominators and parentheses What you wrote is 24x^5- (15x^4/3x^2) but I bet what you mean is (24x^5-15x^4)/3x^2 which is 24x^5/3x^2 - 15x^4/3x^2 or 8 x^3 - 5 x^2
August 4, 2014

POL201
hmmm, around here unfunded means unfunded :)
August 4, 2014

Math
Yes !!! Great :)
August 4, 2014

English/ Help
Yes, I am the first person You are the second person see: http://www.quickanddirtytips.com/education/grammar/first-second-and-third-person?page=1
August 4, 2014

math
(a) i(x) = .04 x + .0475 (29,000 - x) = 1377.50 - .0075 x (b) 1332.50 = 1377.50 - .0075 x
August 4, 2014

Math
Just add like terms 4 u^2 - 5 u^2 plus -2 u + 1 u plus 7 + 3 = - u^2 - u + 10
August 4, 2014

Math
You are welcome poly means more than one or many in general
August 4, 2014

Math
although a polynomial normally has more than one term for example x^2 + 2 x + y + y^3 .........
August 4, 2014

Math
yes :)
August 4, 2014

Math
Then to raise one power to another see: http://mathsfirst.massey.ac.nz/Algebra/Exponents/IntegerExp/RaisePower.htm
August 4, 2014

Math
Here is a link to instructions: http://www.mathsisfun.com/algebra/variables-exponents-multiply.html
August 4, 2014

Math
Again I will assume you mean: (-2x^4)^2 / y -2 *-2 = + 4 x^4 * x^4 = x^8 so 4 x^8 / y which is the same as 4 x^8 y^-1
August 4, 2014

pol week 2 quiz
I would have to Google some of that !
August 4, 2014

math plz ugh
huh - no work required y = -(3/4)x - 5
August 3, 2014

math
sketch it. y = -8
August 3, 2014

math help plz!
7 y = 3 x - 9 so y = (3/7) x - (9/7) m = slope = 3/7 b = y axis intercept when x = 0 = -9/7
August 3, 2014

Physics
There is no horizontal force. Therefore there is no change in the horizontal component of velocity.
August 3, 2014

statistics
http://davidmlane.com/hyperstat/z_table.html
August 3, 2014

math
pi y^2 dx from -1 to +1 same as 2 pi y^2 dx from 0 to 1 2 pi (1-2 x^2 + x^4) dx from 0 to 1 2 pi (1-0) - 4 pi (1^3/3-0) + 2 pi (1^5/5-0) 2 pi - 4 pi/3 + 2 pi/5 (pi/15) ( 30 - 20 + 6) (16/15) pi Check my arithmetic !
August 3, 2014

Calc BC
http://www.jiskha.com/display.cgi?id=1406849570
August 3, 2014

Trigonometry
Yes, right triangle, 7 is hypotenuse, h is opposite the 50 degrees
August 2, 2014

Trigonometry
I drew a sketch Between the steep slope (65 degrees) and horizontal outside it is 180 - 65 = 115 then up at the top of the outside triangle 180 - 115 - 50 = 15
August 2, 2014

Trigonometry
You are welcome.
August 2, 2014

Trigonometry
b) outside triangle is 50, 115 and 15 so sin 15/2 = sin 115/a a = 7 (long slant side) then sin 50 = h/7 h = 5.36
August 2, 2014

Trigonometry
a) angle up at top = 180 - 65 - 50 = 65 oh, my, this is an isosceles triangle, interesting anyway let's find the other two sides for fun sin 50/a = sin 65/2 a = 2 sin 50/sin 65 = 1.69 and b = 2 sin 65/sin 65 = 2 obviously sin 65 = h/1.77 h = 1.69 sin 65 = 1.53 or ...
August 2, 2014

math
1/3 = b/a so a/b = 3/1 which is 3
August 2, 2014

teacing in early childhood programs
Knowing nothing about the subject, I would go with a.
August 2, 2014

Physics
There are no horizontal forces here! NONE!!! Nada ! Zilch ! THEREFORE there is no horizontal acceleration ! Therefore there is no rate of change of horizontal velocity component ! Therefore the answer to this silly trick question is that there is no change in the horizontal ...
August 2, 2014

Physics
first c It passes 11 meters on the way up and on the way down. now the calculations I guess it started at h = 0 (we are lying on our backs in a shallow hole throwing this upward ) Vi = 18 a = -9.81 m/s^2 = g initial Ke = (1/2) m v^2 = 162 m loss of Ke at 11 meters = m g h = ...
August 2, 2014

Physics
C = q/V q = C V i = -dq/dt = -C dV/dt so dV/dt = -i/C V = i R = 4.5 * 10^5 i so i = .222 * 10^-5 V = 2.22*10^-6 V then combine dV/dt = -(1/c)(2.22*10^-6 V) dV/V = -(2.22/49) dt ln V = -.0453 t + constant V = Vi e^-.0453 t . 75 = e^-.0453 t ln .75 = - .288 = - .0453 t t = 6.35 ...
August 1, 2014

Physics
The charge on each is the same. The voltage on each is half the battery = 8.3 volts C = q/V C = .88 *10^-6 /8.3
August 1, 2014

Chemistry / help
Think !!! Which of those expands to fill a bigger bottle?
July 31, 2014

physics
assume you mean 10^3 100 ( 1.50/ 4.32 )
July 31, 2014

physics
look at the question below this one v^2 = 2 g h
July 31, 2014

physics
45 g has nothing to do with this because m cancels (1/2) m v^2 = m g h v^2 = 2 g h v = sqrt (2 g h) [ worth remembering ]
July 31, 2014

physics
assume you mean 10^3 v = 22.5 km/hr (1 hr/3600 s)(1000 m/km) answer = (1/2)(82)(v^2) Joules
July 31, 2014

AP Calc
when x = 0, middle, y = e^0 + e^-0 = 2 when x = 2 or -2 (end) y = e^2 + 1/e^2 = 7.524 so parabola has vertex at (0, 2) and goes through (-2, 7.524 ) and (-2,7.524) we might as well move this down weo so the vertex is at the origin vertex at (0,0) and (2, 5.524) and (-2, 5.524...
July 31, 2014

physics
The same way we did the one below
July 31, 2014

physics
.6 kg * 9.81 m/s^2 * 0.75 m
July 31, 2014

physics
d = Vi t + (1/2) a t^2 450 = 9.6 t + 2.1 t^2 solve quadratic for t then v = Vi + a t v = 9.6 + 4.2 t
July 31, 2014

physics
force * distance in direction of force = 57.5 * 9.81 * 1.25 = 705 Joules = 0.705 kJ the rest of the 2.25 kJ is lost to heat and his own motion
July 31, 2014

physics
v = Vi + a t 28.5 = 0 + 3.70 t
July 31, 2014

physics
assume start from rest v = Vi + a t v = 0 + 3 * 10 which is 30 m/s
July 31, 2014

physics
distance = 820 + 600 time = 10.3 * 60 + 3.8 * 60 average speed = distance / time
July 31, 2014

Mathh
total cards = 110 + 75 + 315 gave away = 110 + 75 percent given = 100 (110+75)/(110+75+315)
July 31, 2014

physics
20 * 9.81 * .7 no work is done carrying. Force is not in direction of motion
July 31, 2014

physics
Vi - 8 t like DROSP said
July 31, 2014

physics
I might do it in m/s though .14 / 180 = 7.77 * 10^-4 m/s = .000777 m/s
July 31, 2014

physics
1 km/min = 60 km/hr
July 31, 2014

physics
water mills and wind mills ?
July 31, 2014

physics
5350 /(5350 + 600) multiply by 100 if you want percent
July 31, 2014

math
First one, roll 6 times p is a two = 1/2 p not a two = 1/2 p a two one out six rolls = (6,1) (6!)/[(1)!(5!)] (1/2)^1(1/2)^5 = 6 (1/2)^6 Second one p is a two = 2/3 p not a two = 1/3 p a two one out of 6 rolls = 6 (2/3)^1 (1/3)^5 = 6 (2)/3^6 P second one / p first one = 2/3^6 /...
July 31, 2014

physics
A (1/2) m v^2 B (1/2)(18m)v^2/9 B/A = twice
July 31, 2014

physics
Jill (1/2) m (100/15)^2 Jon (1/2) m (100/30)^2 Jill/Jon = 30^2/15^2 = 4 Jill's ke = 4 time Jon's
July 31, 2014

physics
10 cm * 1 meter/100 cm = 0.1 meters 120 * .1 = 12 Joules
July 31, 2014

physics
1*9.78 - 5 Does it really say g = 9.78 m/s and not g = 9.81 m/s^2 ???????
July 31, 2014

physics
Francis, read and punch calculator. He gave you the answer.
July 31, 2014

math
4 sqrt 6 ---------- sqrt (6*5) = 4/sqrt 5 * sqrt 5/sqrt 5 = (4/5) sqrt 5
July 30, 2014

PreCalculus
If the events are independent, you multiply the probabilities. For example that would not apply to falling and getting eaten by the shark BECAUSE you were hit by lightning or the ship sank but only as independent events.
July 30, 2014

physics
2.74 + 3.19 cos 61.2
July 30, 2014

Math
Mike (1/60) project/min Walter (w project/min) together (1 + 60 w)/60 project /min [(1+60 w)/60 ] 40 = 1 project 1 + 60 w = 6/4 60 w = .5 w = .0083333 1/w = min/project = 120 minutes
July 30, 2014

ALGEBRA
L = w + 3 (L+2)(w+2) = 70 + (L)(w) (w+5)(w+2) = 70 + (w+3)(w) w^2 + 7 w + 10 = 70 + w^2 + 3 w 4 w - 60 = 0 w = 15 L = w+3 = 18
July 30, 2014

ALGEBRA
approach speed = v + v+60 = 2 v+60 d = rate * time = (2v+60)(5) = 10 v + 300 unfortunately we were not given d, their distance apart so I am faced with a problem or a typo.
July 30, 2014

maths
Republican and Tea Party ?
July 30, 2014

Math
(100 pages / h hours) (1 hour/60 min) = (100/60 h) pages/min * m minutes = (100 m /60 h) Probably C but if so you have a typo
July 30, 2014

calculus 2
y = x^(1/3) ????? h = (6-1)/10 = . x____________ y 1____________ 1 1.5 _________ 1.145 2____________ 1.260 2.5__________ 1.357 3 etc etc etc 3.5 4 4.5 5 5.5 6 integral is about (.5/3)(y0+4y1+2y2+4y3 +2y4 ......+1y10)
July 29, 2014

Physics
Normal force = m g cos 30 max friction force = mu m g cos 30 power in = power out P = (mu m g cos 30) v
July 28, 2014

Physics -- check answers please
yes yes
July 28, 2014

Physics
-4 F (opposite charges attract)
July 28, 2014

pharmacy
huh? .930/3 = 0.310 mg
July 28, 2014

Calculus
easy way: r = (4/16) h = (1/4) h surface area = pi r^2 = pi (1/16) h^2 dV = surface area * dh dV = pi (1/16) h^2 dh DV/dt = (1/16) pi h^2 dh/dt hard way: V = (pi/3) r^2 h given again r^2 = (1/16) h^2 V = (pi/3)(1/16) h^3 dV/dh = (pi/16) h^2 again dV/dt = (pi/16) h^2 dh/dt
July 27, 2014

math
speed = s current = c s + c = 17.2 s - c = 10.4 ------------ add 2 s = 27.6 etc.
July 27, 2014

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