Recent content by sam_0017

so is the statement is true ?? tanh(t)~t- t^3/3 + 5t^5 as t\rightarrow 0 i find that the lim tanh (t)/(t- t^3/3 + 5t^5) = 1 when t\rightarrow 0. so is the statement is true ??

true or false .. The system {S,+,.} with S = { matrix (a,b,a-b,a)|a,b ∊ R) is not a field under matrix addition (+) and matrix multiplication (.) i find that the statement is false . since : 1. {S,+} is Abelian group. 2. {S,.} : is Abelian group. is my finding is true ?

Homework Statement true or false .. The system {S,+,.} with S = { matrix (a,b,a-b,a)|a,b ∊ R) is not a field under matrix addition (+) and matrix multiplication (.) i find that the statement is false . since : 1. {S,+} is Abelian group. 2. {S,.} : is Abelian group. is...

any one know how to solve b

i tray to solve it and i find this resolute, can anyone tell me are my way right ?? v(0)= 100 L , c(0) = 0.1 gm/L , c(t)=0.5 gm/L v`= 10 ==> v (t) = 10t + k ==> v(0) = 0 + k =100 ==> k=100 so : v(t) = 10 t + 100 (mass) m= c(t) * v(t) m`=c`(t)v(t) + c(t) v`(t) 10 =...

can you help me ?? A 200 liter tank initially contains 100 liters of water with a salt concentration of 0.1 grams per liter. Water with a salt concentration of 0.5 grams per liter flows into the tank at a rate of 20 liters per minute. Assume that the fluid is mixed instantaneously and that...

can you help me ?? A 200 liter tank initially contains 100 liters of water with a salt concentration of 0.1 grams per liter. Water with a salt concentration of 0.5 grams per liter flows into the tank at a rate of 20 liters per minute. Assume that the fluid is mixed instantaneously and that...

can anyone help me with this Question ? On a TV Game Show fifteen people from the audience are chosen randomly to compete for prizes. Assume these fifteen people return in the audience of N people for the next week's show when another fifteen people are chosen randomly to compete for...

and also this question ? For A = {1, 2, 3, 4, 5} and B = {w, v, w, x, y, z], deter- mine the number of one-to-one functions f:A→B where f(1)≠v or w , f(2)≠u or w , f(3)≠x and f(4)≠v or x or y .

[SIZE="3"]help withe this tow Question please ? Q1: A pair of dice, one red and the other green, is rolled six times. We know that the ordered pairs (1, 1), (1, 5), (2, 4), (3, 6), (4, 2), (4, 4), (5, 1), and (5, 5) did not come up. What is the probability that every value came up...

game of KENO ? can anyone help whit this question ? [PLAIN]http://up.arab-x.com/Oct11/doY59204.png E(n) = Ʃ p(n) × a(n) " represent the probability you get i matches as P(i), the amount you win for i matches as A(i) and the expected value for n numbers picked as E(n)."

[SIZE="5"]can anyone help me with this question :

you can see P ( A|B) = p(A \cap B) /p (B)

Thanks, but i solve the problem this way and i don't know is it correct or not: i. p(yellow, harry thinks it's yellow) = 0.3 * 0.6 = 0.18 p(yellow, harry thinks it's buff) = 0.3 * 0.4 = 0.12 p(buff, harry thinks it's yellow) = 0.7 * 0.2 = 0.14 p(buff, harry thinks it's buff) = 0.7 * 0.8...

Data is collected on the number of fish caught per day on a month long fishing expedition. It is hypothesised that the data are consistent with a negative Binomial random variable ,X , starting at 0, so that X~Neg Bin(k,p) where E[X]=k(1-p)/p and Var =k(1-p)/p^2 . However, before a hypothesis...