Wednesday
July 23, 2014

Posts by Damon


Total # Posts: 17,491

Math
t = k/r 2 = k/67 k = 134 (which happens to be the distance) t = 134/r t = 134/55 t = 2.436 hours

Science
weight = f ( vitamin A) weight is dependent on vit A hypothesis the weight of the rats depends on how much vitamin A they get in their diet.

Math
Carla, Ms Sue told you to type them in order, then look at the middle.

Math
even number, average of the two middle ones

Maths
y = k/x 2 = k/8 k = 16 y = 16/x a^2-b^2 = (a-b)(a+b) always

Algebra
1 2 3 4 5 6 * * 2/6 = 1/3

Math
You are welcome :)

Math
If c = .2 n = 6/.2 = 30 so sold 25 for .3 so got 25*.3 = 7.5 sure enough

Math
1.25 * 6 = 7.5 profit = 1.5 let cost per box = c sales price = s = c+.1 bought n gave away 5 sold (n-5) cost = n c = 6 so n=6/c sales = (n-5)(c+.1) so (n-5)(c+.1) - 6 = 1.5 (6/c -5)(c+.1) = 7.5 6 -5c + .6/c -.5 = 7.5 -5c + .6/c = 2 -5 c^2 -2 c + .6 = 0 5 c^2 + 2 c -.6 = 0 c = ...

Algebra 1--Please, help me!
Incomprehensible. Typos?

Algebra 1
look for vertex of the parabola in algebra. (You would be able to do it much faster with calculus or physics) t^2 - 9.25 t - 1.875 = -h/16 t^2 - 9.25 t = -h/16 + 1.875 t^2-9.25t+4.265^2 = -h/16 +1.875+21.39 ( t-4.265)^2 = -1/16( h - 372.25) So, I think it is d and at 4.265 sec...

Math
Nah, I do not have to do an experiment. there are four equally likely outcomes.

Science
http://www.jiskha.com/display.cgi?id=1400875475

having trouble please help?
Do you think we should allow them ... starts out biased (should we throw them in jail or merely hang them?) "syrupy soft drink" implies bias ---> Should there be a ----- no bias healthy versus unhealthy ? certainly biased

Calculation in chemistry
2 grams of M in 8 grams of MOn where M is metal symbol and n is O atoms per metal atom There were 8-2 = 6 grams of O in MOn 6 grams of O * (1 mol of O/16 grams) = 6/16 = 3/8 mol of O which is 3/16 mol of O2 so 3/16 mol of O2 combines with 2 grams metal so .5 mol of O2 combines...

Math
draw a sketch The bottom has height 7 The top has height 9 The left side is at 4 the right side is at 8 what is missing is the upper right at (8,9)

science
v = g t 20 = 9.81 t t =2.03 seconds h = (1/2) g t^2 h = 4.9 (2.03)^2 h = 20.4 meters

Science
same Justin the whole tie amount of tissue needed depends on type of tissue used pulse rate is the dependent variable and I do not know why you say it is not write as: pulse rate = f(music type) see definition:http://dictionary.reference.com/browse/dependent+variable

physics
final momentum = 4.7 (1000+2200)=15040 initial momentum = 1000 v so v = 15.04 m/s

physics
a liter is 10^3 = 1000 cm^3 so we have 22.4 * 1.5 = 33.6 moles of gas at 273 deg K and 100 kPa P V = n R T n and r remain the same so P1V1/T1 = P2V2/T2 100 (1500)/273 = P2 (1000)/253 P2 = 139 kPa ABSOLUTE pressure - 100 KPa for gage = 39 k Pa gage

Algebra
Here is a combinations and permutations calculator to get permutations, the "Is order important" box should be YES to get combinations the is order important box is NO http://www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html Here you are doin...

HELP!!!! MATH
LOL, I would have had the 15 degrees from horizontal, living on the bleak ocean where at least a seven to one scope is required.

geometric
No C) foot

geometric
Given those English unit choices, I think foot is the correct choice. A standard shipping container is 20 feet long but most these days are double that, 40 feet long.

Physic
x = A sin w t v = A w cos wt a = -w^2 A sin wt = -w^2 x so A w = .438 or w = .438/A A w^2 = 1.53 so A *(.438)^2/A^2 = 1.53 so 1.53 A = .192 A = .125 m

One last math question
1/2 - 1/9 = 9/18 -2/18 = 7/18 18 * 7/18 = 7 2/3 - 1/6 = 4/6 - 1/6 = 3/6 = 1/2 9 * 1/2 = 9/2 so 7+9/2 = 14/2+9/2 = 23/2 then 23/2 / (5/2) = 23/5 = 4 3/5

math
Draw a sketch of the ten tables in a row. Only two people can sit at the middle ones because the ends are up against the next tables. for the two tables on the end, the usual two can sit plus one on each end of the whole line

math
20* .3 + 15 * .05 = 6 + .75 = 6.75 ============================ the middle 8 tables only seat 2 but the two end tables seat 3 8*2 + 2*3 = 16 + 6 = 22

algebra
h(m+1) = 2 f f = h(m+1)/2

5th Grade ADV. Math
You are welcome :)

5th Grade ADV. Math
another way A plays the other 3 B plays only C and D more because has already played A that is 2 more C plays only D because has played A and B so one more 3+2+1 = 6 again plus that last game = 7

5th Grade ADV. Math
That did not line up right, but I hope you see the point

5th Grade ADV. Math
Whoops, you do not do it that way in grade 5 Make a grid ___A___B___C___D A --- * --* --* B----------*---* C--------------* D ------------- The stars are the games played in the first round You see there are 6 of them then the final is 7

5th Grade ADV. Math
combinations of four taken two at a time = 4C2 = 4!/[ 2! (4-2)! ] = 4*3*2 /(2 * 2) = 6 games before the final so 7

calculus
If you draw this you see you want the integral from y =0 to y = 3 of -x dy y = ln(1-x) e^y = 1-x -x = e^y -1 so integral from 0 to 3 e^y dy - dy e^y - y at 3 = e^3-3 e^y - y at 0 = 1 so e^3 - 4 about 20 - 4 = 16

pre-algebra
when x increases by 2, y always decreases by 1 so m = slope = -1/2 y = -x/2 + b put in a point like (4,0) 0 = -4/2 + b so b = 2 so y = -x/2 + 2

Math
You are welcome.

Math
The top of the first rainbow will not fit into the bottom of the one above it.

math
tan 15 = d/495

math
You are welcome :)

math
yes -10 + 8 = -2 yes 9 - (-9) = 9+9 = 18

Algebra where did I go wrong
5! / [ 2! (5-2)! ] 5!/(2! 3!) 5 * 4 * 3 *2 /(2 * 3 * 2) 10

math
combine LIKE terms 8x + 6 x = 14 x 2 = 2 so 14 x + 2

MATH
You are welcome.

MATH
L * w = 225 2 L + 2 w = 60 so L + w = 30 and w = 30-L L (30-L) = 225 30 L - L^2 = 225 L^2 -30 L + 225 = 0 (L-15)(L-15) = 0 L = 15 meters

SCIENCE HELP !!
Do muskrats eat catfish? If so, they might get hungry.

college calculus
.5 = e^-k(5730) ln .5 = -.6931 = - 5730 k k = 1.2097*10^-4 .45 = e^-1.2097*10^-4 t ln .45 = -.7985 = -1.2097*10^-4 t t = 6601 years

Algebra
I can not. { x-[ -2 + sqrt(160) ]/6} * {x+[ -2 + sqrt(160) ]/6}

History
I guess I would go with Midway of the choices above. He certainly did not buy Alaska from Canada :)

History
seward's folly

History
Lots of things, including buying Alaska (Seward's Folly)from Russia :)

algebra/ Can see I am right
arrangements of three letters: 26^3 = 17576 but subtract 241 17335 times 1000 17,335,000

Math please check my answers?
237 (1.02)^t is correct

Math please check my answers?
slope = (83- -29) / (-2 - -10) = 112/8 = 14 which is indeed positive :)

appliance repair
Although E is the answer they are looking for, E is much more commonly used for the electric field strength which is Volts per meter. The question is poorly written.

Algebra
You are welcome. This is a good example to diiferentiate between combinations and permutations Combinations of 31 taken 5 at a time would be 31! /[ 5! (31-5)! ] That takes into account all the different groups of five you can make, but does not order the five for specific offi...

Algebra
It is not combinations because the order matters, it is permutations. (Joe could be either president or vice president for example and those are not the same) 31!/(31-5)! = 31!/26! = 31*30*29*28*27 = 20,389,320

Evaluate the expression.Algebra
9*6*3 /(6*4) 9*3/4 27/4

geometry
2 x + 10 = 80 2 x = 70 x = 35

physics
used up 67,500 + 290,000 - 30,000 Joules

math 6 probaility
there are four possible outcomes of flipping a pair h h h t t h t t so you should get h h 60/4 = 15 times we got it 24 or 9 more times than expected

math 6 probability
It is a whole new game after the first play. 75% IF you had said what is the probability of him hitting two in a row, that would be .75*.75 BUT that is NOT what you were asked.

math
up 4 in horizontal 10 so 4/10 = .4

math
do the others the same way

math
That was using the distributive property. You can also use FOIL if you know it.

math
4. (3x + 4)(x – 2) (1 point) 3x(x-2) + 4(x-2) 3 x^2 - 6 x + 4x - 8 3 x^2 -2x - 8

math
2 x * 10 x = 2*10 * x *x = 20 x^2 2. –3m(m + 8) = -3 m(m) + -3m(8) = -3m^2 - 24 m

math 6 probability
no, it hit the red section 225 times out of 1125 times spun

math 6 probability
5*225 = 1125

History
I guess you are talking about Canada maybe? Railways came after the revolution in the US. Was Canada several colonies so they could have inter-colonial railways?

Algebra please check my answers
4) The formula below can be used to find the amount of radioactive material that remains after a certain period of time, where A0 is the initial amount of material, A is the amount of material remaining after t hours, and k is the decay constant. A = A0(2.71)-kt !!!!!!!! =====...

Algebra please check my answers
3) Robert is considering purchasing a manufactured home that costs $77,300. If he expects the home value to decrease 8% each year, which function will show the value of Robert's manufactured home in t years? A. V(t) = $83,484t B. V(t) = $77,300(-0.92)t C. V(t) = $77,300(1....

geometry
6/15 = x/81

Math
band alone 11 choir alone 17 band and choir alone 4 band and math alone 7 math and choir alone 6 band choir and math 3 math alone 9 from 11+4+10+6+17 + M = 57 so 2 classes = 4+7+6 = 17

Math 6 meters help
144 = 2L + 2 w so L + w = 72 L = w + 4 so w + 4 + w = 72 2 w = 68 w = 34 then L = 38 A = L * w = 38 * 34 = 1292

algebra
not combinations because order does not matter in combinations we need permutations of 7 taken 4 at a time p(n,r) = n!/(n-r)! = 7!/3! = 7*6*5*4 = 840

Algebra
x intercept of f(x) = -3 y intercept of f(x) = 12 g(x) = -3 x -9 x intercept of g(x) = -3 y intercept of g(x) = -9 so it is not A

HIS204
By the way I agree with Stephen and with Ms. Sue. However I feel especially strongly about 4.4 since I lived in California during the war and friends of my family were included. http://www.history.com/this-day-in-history/war-relocation-authority-is-established-in-united-states

HIS204
4.4 !!!! Look up history of Japanese - Americans during WW2

Math
8*8 = 64 squares first piece has two possible spots so 2/64 is chance it will pick one of them now there are 63 spots left and the second piece has to hit it. 1/63 is that probability 2/64 * 1/63 = 4.96*10^-4 = .000496 ------------------------------- 8 rows first piece can hit...

Math 6. Correct?
You are welcome.

Math 6. Correct?
3/18 = 5/30 yes

Math 6. Correct?
30 feet = 360 inches 360/5 = 72 to 1 4.5 inches * 72 = 324 inches = 27 feet not 29.5

trianom
the minute hand does two complete circles distance around 2 circles = 2 * 2 pi r = 4 * pi * 9 = 113 inches

Physics
That link is to the commutator page. Go back one page in the link to see why the current in the armature electromagnet must be reversed every half turn.

Physics
reverses current in armature as the shaft turns so that torque is always in the same direction. http://electronics.howstuffworks.com/motor5.htm

Civics
I should hope D (I think you mean opinions, not options). However all too often we seem to get A

u.s. history
We entered WW1 toward the end of the war and the country was not nearly so involved in WW1 as in WW2. After WW1 tough, we were a major nation on the world stage because the arrival of American troops in France was crucial to the allied victory.

u.s. history
Well I see that Victory gardens and stamp ration books for example were used in both wars, but sorry, I do not know enough about WW1 in the USA to help.

u.s. history
Do you men WW1 or WW2 ???? Your answers apply to WW2 Not sure about WW1, was not there, but it was short for the USA (NOT for Europe !! ) and did not require the home front mobilization of WW2

help please on this
mutation see: https://answers.yahoo.com/question/index?qid=20120409133046AADHBVS

Physics -- check answers please
2, yes c 3. is D. You need a transformer and rectifier in the little box you plug in to the wall to charge your cell phone.

Physics -- check answers please
1. a If you look at a maritime chart you will see that true north is up toward the top of the page but magnetic north is a different direction, here about 17 degrees to the west for example.

Math - Inequalities
You are welcome :)

Math - Inequalities
a closed dot means included like x < 5 means less than (open) x </= 5 means less than or equal to (closed) http://mathcentral.uregina.ca/QQ/database/QQ.09.05/cynthia1.html

math
tan slope = 13/5 slope = tan^-1 (13/5) = 69 degrees

Geography
They were heavily involved in maritime trade with everyone from China to Egypt even long before Vasco de Gama opened the Indian Ocean and then the South China Sea to European traders and they tended to adopt the religions brought by the people they traded with. That includes H...

math 6 rule pattern
You are welcome.

math 6 rule pattern
except for 3 3 they are all multiply by 2, add 1 I bet 3 3 should be 3 7

error at end
t at top = 14/9.8 = 1.43 s total time in air = 2t = 2.86 s 20 = u (2.86) so u = 6.99 m/s so U = sqrt (6.99^2+14^2) = 15.64 m/s and tan theta = 14/6.99 theta = 63.5 degrees

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