Monday

November 30, 2015
Total # Posts: 23,041

**History**

Yes, B
*November 30, 2015*

**Geometry**

not if they are distinct lines in a plane. not that I know of unless they are the same plane in three dimensional space.
*November 30, 2015*

**Math**

six ten thousandths twenty eight ten thoundths
*November 30, 2015*

**History**

D yes
*November 30, 2015*

**Math ?**

I don't get it. Are i and j unit vectors or is i (-1)^.5 ?
*November 30, 2015*

**Physics ._.**

well, I will try to do dimensional analysis because I have no idea. constant * cross sectional area inversely proportional to length 1 hr = 3600 s 4.1 cm^2* 1m^2/10^4 cm^2 = 4.1*10^-4 m^2 Q = k * A/L * delta c * time try Q = 1.24*10^-9 m^2/s * 4.1*10^-4 m^2 /.0106 m * 1.37 kg/...
*November 30, 2015*

**History**

Yes, C
*November 30, 2015*

**Science**

The only reason we always see the man in the moon is that the moon spins around its own axis at exactly the period it revolves in its orbit around earth. Any other period of rotation would let us see the dark side of the moon :) Try it with a tennis ball and a table lamp :)
*November 30, 2015*

**Math**

You are welcome.
*November 30, 2015*

**Math**

log z + log y^2 - log x^3 = log [ z y^2 / x^3 ] = log [ z y^2 x^-3 ]
*November 30, 2015*

**History**

Yes, 3/5 of a person per slave. (but of course the slave was not allowed to cast even 3/5 of a ballot)
*November 30, 2015*

**History**

You won again :)
*November 30, 2015*

**History**

You are
*November 30, 2015*

**History**

No, the question is about the Articles and their weakness.
*November 30, 2015*

**History**

Well your mom picked the Constitution but you picked the Articles of Confederation
*November 30, 2015*

**math**

As I said, you can not solve for x, y and z with two equations
*November 30, 2015*

**History**

That is from http://www.history.org/foundation/journal/Winter15/barbary.cfm You are welcome. I am from a New England seaport so am touchy on this subject.
*November 30, 2015*

**History**

Naturally, British protection for American ships ended with independence. It took little time for the pirates to renew their attacks on United States' merchantmen. The new nation could do little to stop them. New Hampshire Congressman Pierse Long accurately described the ...
*November 30, 2015*

**History**

"...... to the shores of Tripoli ......"
*November 30, 2015*

**History**

Nah, B Could not raise taxes, fight war against the Barbary coast pirates .......
*November 30, 2015*

**History**

I tend to agree with you, still eat corn and listen to Jazz.
*November 30, 2015*

**math Huh?**

I need three linear equations for 3 unknowns. all I can say is x - y = -2
*November 30, 2015*

**Math**

3 = 10^a 5 = 10^b 7 = 10^c 15 = 10^(a+b) 15^(log15 7) = 7 = [10^(a+b)]^log15 7 10^c = 10^(a+b)log15 7 so c = (a+b) log15 7 log15 7 = c/(a+b)
*November 30, 2015*

**math**

Use Ms Sue's answer I confused goals and attempts
*November 30, 2015*

**math**

.65 * 80 = ? 80*100/327 = ?
*November 30, 2015*

**Algebra**

(-1 - y)/(10-6) = 1/4 (-3-2)/(4-4) heavens to mergetroid ! (10-13)/(17-12) = -5/3 ?? I do not think so, try the others
*November 30, 2015*

**Math**

3/5 = .60 17/20 = .85 so .49 .5 .6 .85
*November 30, 2015*

**calculus**

L = length = 14 - 2h w = width = 10 - 2 h V = L * w * h = (14-2h)(10-2h)(h) = (140 - 28 h - 20 h + 4 h^2 )h = 4 h^3 -48 h^2 + 140 h so dV/dh = 0 at max 0 = 12 h^2 - 96 h + 140 0 = 3 h^2 - 24 h + 35 h = [ 24 +/- sqrt (576-420) ] /6 h = 4 +/- (1/6)(12.5) h = 6.08 or 1.92 6.08 is...
*November 30, 2015*

**Math**

386*100/1112 = 34.71
*November 30, 2015*

**math**

T(0) = a (1 - e^0) + b = 50 T(0) = a(1-1) + b = 50 so b = 50 T(oo) = a(1 - e^k*oo) +50 = 350 so k better be negative 350 = a + 50 a = 300 so T = 300 (1-e^kt) + 50 T(2) = 300 (1-e^2k) + 50 = 60 1- e^2k = 1/30 e^2k = .96667 2 k = ln .96667 k = -.01695 150 = 300 (1 - e^-.01695 t...
*November 30, 2015*

**Algebra!!**

(4-5)/(1+2) = -1/3 now you try some.
*November 30, 2015*

**Algebra**

I can not imagine why you would divide. 3^4 - 6 * 3^3 - 4 * 3^2 - 6 * 3 - 2 = 81 - 162 - 36 - 18 - 2
*November 30, 2015*

**PreCalculas**

36^(1/2) * 3 * 64^(1/2) 6 * 3 * 8
*November 30, 2015*

**maths**

a1 + a1+d + a1+2d ...... a1+(n-1)d sum = n (a1 + an)/2 sum of first 20 = 20 (a1+a20)/2 sum of first 30 = 30 (a1 +a30)/2 so 10 a1 + 10 a20 = 15 a1 + 15 a30 5 a1 = 10 a20 - 15 a30 sum of first 50 = 50 (a1+a50)/2 = 25 a1 + 25 a50 a20 = a1 + 19d a30 = a1 + 29d a50 = a1 + 49d but 5...
*November 30, 2015*

**social studies**

It covers not just history but also how people live now and how they are governed and how they make a living.
*November 30, 2015*

**social studies**

qanats move what? Google qanats followers of Ayatollah Khomeini want? Google Khomeini too not sure about 12
*November 30, 2015*

**PreCalculas**

no, wrong. The higher the Db the louder 140 = 10 log (Ijet/Io) 115 = 10 log (Iband/Io) 14-11.5 = log (Ijet/IIband) 10^2.5 = Ijet/Iband = 316 the jet intensity (power) is 316 times the rock concert
*November 30, 2015*

**PreCalculas**

You mean I think: Db = 10 log (I/Io)
*November 30, 2015*

**math**

regroup 10 in ten column into 1 in hundred column five hundreds + zero tens + 3 ones
*November 29, 2015*

**algebra**

distributive property (a+b)(c+d) = (a+b)(c) + (a+b)(d) = ac + bc + ad + bd factor ac + bc + ad + bd = (a+b)c + (a+b)d = (a+b)(c+d) so the same really, just moving in opposite directions
*November 29, 2015*

**girls secondary school ikenegbu**

C = Q/V so V = Q/C Vk = 10 Vu = 6 Q the same on both so 10 = Q/6*10*-6 Q = 6*10^-5 coulombs 6 = 6*10^-5 /Cu Cu = 10^-5 farads = 10 microfarad energy = (1/2) Q V for each
*November 29, 2015*

**Physics**

we need the kinetic friction work done by friction = initial Ke mu m g x = (1/2) m v^2 .5 (9.81) x = 9.78^2 / 2 x = 9.75 meter slide well, she made it !
*November 29, 2015*

**Physics**

from before: She must do 50 meters in 7.67 seconds with starting speed v and acceleration of .85 50 = v (7.67) + (1/2) .85 (7.67)^2 50 - 25 = 7.67 v v = 3.26 m/s starting speed NOW :::::: v = 3.26 + .85 (7.67) = 9.78 m/s as she pops out into the sun
*November 29, 2015*

**Physics**

I remember http://www.jiskha.com/display.cgi?id=1448486880
*November 29, 2015*

**physics**

You are welcome. Most of us started a while ago.
*November 29, 2015*

**physics**

Imagine in a balloon with perfectly stretchy walls as you add Q, the gas expands keeping the pressure constant That means that work is done pressure * area times expansion distance or integral of p dV. Meanwhile the gas heats up. Look up constant pressure expansion. W = n R ...
*November 29, 2015*

**math**

w^2 + (2w)^2 = 4^2 5 w^2 = 16 etc
*November 29, 2015*

**algebra**

Happens all the time :)
*November 29, 2015*

**algebra**

well 3/9 for the first but 2/8 for the second 1/3 * 1/4 = 1/12
*November 29, 2015*

**Physics**

go at 9.5 at angle A from straight across 0 = final upstream velocity = 9.5 sin A - 4.9 so sin A = 4.9/9.5
*November 29, 2015*

**math**

(.6*450)(1.4)= 378
*November 29, 2015*

**Physics**

You are right but we need to find that centripetal acceleration to really answer part c find max velocity v = A(2 pi/T) cos 2 pi t/T max of cos is 1 in the middle of the ravine of course A = half width of ravine = 1.51/2 = .755 meter so vmax = .755(2 pi/4.817) = .985 meters/...
*November 29, 2015*

**Physics**

sin 10 = half width/L so half width = L sin 10 = .174 L and' width = .347 L or width/L = .347 ---------------------------- only a chicken would look up pendulum period. We are tough. x = A sin 2pi t/T v = A(2 pi/T) cos 2 pi t/T a = -A (2 pi/T)^2 sin 2 pi t/T or a = -(2 pi/...
*November 29, 2015*

**Math**

where do they cross? x + 12 = 3 x + 1 2 x = 11 x = 5.5 so y = x+12 is above y = 3x+1 in the domain of this problem find area below y = x+12 Now I assume you do not know calculus so will make a quadrilateral at x = 0, y = 12 at x = 2, y = 14 so at center y = 13 so area between ...
*November 29, 2015*

**History**

http://www.google.com/search?q=populist+party+campaign+poster&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiE5MfT1rbJAhWFpB4KHcUVDMEQsAQIJA&biw=1920&bih=949
*November 29, 2015*

**History**

here are some :) https://www.google.com/search?q=populist+party+campaign+poster&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiE5MfT1rbJAhWFpB4KHcUVDMEQsAQIJA&biw=1920&bih=949
*November 29, 2015*

**Algebra**

when 750 = 300 + 20 c 20 c = 450 c = 22.5 so 22
*November 29, 2015*

**Algebra**

m = 2 + 2x x + m = 26 so x + 2 + 2x = 26 3 x = 24 x = 8 so m = 2 + 16 = 18
*November 29, 2015*

**Social Studies (Check, Please!)**

Thank you for clarification Reed !
*November 29, 2015*

**Social Studies (Check, Please!)**

Yes, the original act also helped unemployed, but social security benefits are for retirement and disability.
*November 29, 2015*

**Social Studies (Check, Please!)**

for the elderly and the unemployed. or for the elderly and the DISABLED ??
*November 29, 2015*

**State History**

By the way, New Orleans is NOT the capital !!
*November 29, 2015*

**State History**

What country in Europe has a city named Orleans? (Hint - Joan of Arc) What European countries were first in Louisiana? Check out: http://www.louisianafolklife.org/LT/Maidas_Essay/main_introduction_onepage.html for example: Exceptions are St. Francisville in West Feliciana, ...
*November 29, 2015*

**Physics- Mastering Physics**

http://www.jiskha.com/display.cgi?id=1448824684
*November 29, 2015*

**Physics- Mastering Physics**

I just answered this.
*November 29, 2015*

**This question is messed up**

" shows 100 g loss in its weight " 100 grams??? grams is mass not weight 100 * g where g = 10 m/s^2 ?????? then weight loss is 1000 Newtons?
*November 29, 2015*

**Math**

(v1 + v2)7.5 = 450 so v1 + v2 = 60 miles/hour and v1 - v2 = 30.4 ------------------ add 2 v1 = 90.4 v1 = 45.2 miles/hour so v2 = 14.8 miles/hour
*November 29, 2015*

**science**

ignoring air drag, maximum range is at 45 degrees. http://www.wired.com/2010/09/maximum-range-in-projectile-motion/
*November 29, 2015*

**indian school**

tan 45 = 60/da tan 30 = 60/db
*November 29, 2015*

**physics**

assuming your given forces are in first quadrant Fx + 48 cos 60 = 0 Fy + 25 + 48 sin 60 = 0 |F| = sqrt (Fx^2 + Fy^2) tan theta = Fy/Fx
*November 29, 2015*

**math**

Column two would be 30 all the way down. It is connstant
*November 29, 2015*

**maths**

tan theta = 3 theta = 71.6 degrees
*November 29, 2015*

**Graphing Reciprocal Trig Functions**

asymptotes at 0, pi, and 2pi means at x-3 = 0 or x = 3 x-3 = pi or x = pi + 3 x-3 = 2 pi or x = 2 pi + 3
*November 29, 2015*

**Math**

-4 to + 6 = 10 3/4 of 10 is 7.5 -4+ 7.5 = 3.5 4 to -2 is -6 3/4 of -6 is -9/2 4 - 9/2 = -1/2 (3.5, .5)
*November 29, 2015*

**Science Help**

over 28.8 years, half of it breaks down into other isotopes, elements and particles. Over the next 28.8 years, half of that half breaks down so we have 1/4. In another 28.8 years half of the quarter breaks down so we have 1/8 of the original etc. The decay is known as beta- ...
*November 29, 2015*

**Physics**

False, who says it is not moving when t = 0 ?
*November 29, 2015*

**PHYSICS**

volume = 10*10*10 cm^3 mass = density * volume
*November 29, 2015*

**physics**

1 kg at (0,0) 2 kg at (0,2) 3 kg at (1,2) 4 kg at (1,0) total mass = 10 kg xcg = (1/10)(1*0 +2*0 + 3*1 +4*1) = 7/10 ycg = (1/10)(1*0 +2*2 + 3*2 +4*0) = 1
*November 29, 2015*

**chemistry**

you want ions floating around so they can grab each other
*November 29, 2015*

**science**

g = 9.81 m/s^2 so g/2 = 4.9 0 = 1.2 + 20 t - 4.9 t^2 or 4.9 t^2 - 20 t - 1.2 = 0 solve quadratic for t (use positive answer choice)
*November 29, 2015*

**science**

Ac = v^2/R for A it is 1600/20 = 80 m/s^2 for B it is 1600/25 = 64 m/s^2 etc
*November 29, 2015*

**math-unit rates**

(1/4)(20) / [(2/5)(20)] = 5 / 8 (1/2)(14) / [(1/7)(14)] = 7 / 2 5/8 mile / hour is less than 7/2 mile/ hour. John walks faster so further in an hour.
*November 28, 2015*

**Statistic**

http://davidmlane.com/hyperstat/z_table.html
*November 28, 2015*

**Statistic**

Ah, you also have normal distribution ones Google normal distribution. Th David Lane one is easy to use
*November 28, 2015*

**Statistic**

http://ncalculators.com/statistics/binomial-distribution-calculator.htm The ones I see that you have posted are really all the same
*November 28, 2015*

**Statistic**

Google "binomial distribution" maybe
*November 28, 2015*

**Statistic**

Hey, this is just another binomial dist prob try http://ncalculators.com/statistics/binomial-distribution-calculator.htm
*November 28, 2015*

**Geography**

http://www.philippine-history.org/edsa-people-power-revolution.htm
*November 28, 2015*

**MATH**

a and (12-a) 4 (12-a) + 1 = (1/2)a 48 - 4 a + 1 = a/2 49 = 9 a/2 98 = 9 a a = 98/9 12 - a = 10/9 ======================== check 98/9 + 10/9 = 108/9 = 12 4(10/9) = (1/2)(98/9) - 1 ??? 40/9 = 49/9 - 9/9 = 40/9 sure enough
*November 28, 2015*

**Geometry**

sin 17 = h/60
*November 28, 2015*

**math**

6 + 300 * 0.001 + 70 * 0.001 + 2 * 0.001 = 6.372
*November 28, 2015*

**math**

No way. That makes no sense.
*November 28, 2015*

**Physics**

-m g h = -20 * 9.81 * 1 Joules answer is negative because motion is opposite to force.
*November 28, 2015*

**math**

Only one of the six sides has six dots so 1/6 = .166666 ........
*November 28, 2015*

**Math**

y = m x + b y = (3/2) x + b -1 = (3/2)(10) + b b = -16 y = (3/2) x -16
*November 28, 2015*

**M**

white pair = 4/10 = .4 blue pair = 2/10 = .2 sum = .6 for either or p blue = .2 p not blue = .8 so p one and only one blue in three picks = .2 * .8 * .8 do similar for white and black and multiply
*November 28, 2015*

**math**

1 2 3 4 5 1 2 3 4 5 6 7 8 9 so 5/9 = .555........
*November 28, 2015*

**algebra**

yes, which is 2/5 which is 0.40
*November 28, 2015*

**algebra**

divide the number of blue ones by the total number
*November 28, 2015*

**Physics**

force times distance = 150 * 2 = 300 Joules
*November 28, 2015*