# Search results

1. ### Comparing industrailized countries vs. less-developed

should i use the residual plot in comparing the industrailized countries vs. less-developed country? i mean, is it relevant if i use that? coz here is my thesis...What are the effects of population, GDP, GDP per capita and unemployment rate in the economy of industrialized country and...
2. ### Binomial theorem

anyone could help me with this question... in the expansion of (ax + by)^n, the coeffiients of the first 3 are 6561, 34992, and 81648., Find the value if a, b, and n. i did this... t1 = nC0 (ax)^n = 6561x^n a^n = 6561 t2 = nC1 (ax)^n-1 (by)^1 = 34992x^n-1y bna^n = 34992 but i'm not...
3. ### Birthday probability

this is the problem... there are 25 students in a Data Management Class. Determine the probability that at keast two of them share the same birthday. (Assume that every year has 365 days) --> i have no clue what technique what to do here... coz this is a thinking question so its kinda hard for...
4. ### Confusing probability

this is the problem... 1. nine horses are entered in a horse race. If you "box" three horses (three are chosen and they can finish in any of the first 3 positions in the race), determine the probability that you will hold the winning ticket. -->i tried this one... (3C1*3C2*3C3)/9C3 but my...
5. ### Deck of card probability

i have no idea which technique of probability to choose. here is the problem... 1. a five-card poker hand is dealt and the last card is turned face up. Determine the probability that you have been dealt four aces, given that the card turned over is an ace. 2. I how many ways can a group of...
6. ### Probability permutations

I just want to ask if my work is correct... This are the questions: 1. In how many ways can the letters of MISSISSAUGA be arranged? -->6*6*6*6*6*6*6*6*6*6*6 = 362,797,056 2. A man bought two vanilla ice creams, three chocolate cones, four strawberry cones and maple walnut cone for his 10...
7. ### Permutations homework question

i just want to ask if my answer is correct... the problems is .... how many numbers greater than 300 000 are there using only the digits 1,1,1,2,2,3? my answer is... 1(three)*5(the position)*2(the numbers 1 and 2) = 10 therefore, the numbers greater than 300 000 is 10 is this right...
8. ### Permutations of the number of players on a baseball team

i cannot get the question since i dont know how to play baseball... this is the question... The manager of a baseball team has picked the nine players for the starting lineup. In how many ways can he set the batting order so that the pitcher bats last? im just guessing, is this correct...
9. ### Baseball permutations help

i cannot get the question since i dont know how to play baseball... this is the question... The manager of a baseball team has picked the nine players for the starting lineup. In how many ways canhe set the batting order so that the pitcher bats last?
10. ### Probability solve the expression P(2n+4,3) = 2/3P(n+4,4) for n

i just want to confirm if my anser is right.... this is the problem: solve the expression for n Є N P(2n + 4, 3) = 2/3P(n+4, 4) this is my work: (2n +4)!/(n-3)! = (2/3(n+4)!)/(n-4)! -2(n-2)!/(n-3)! = -2/3(n-4)!/(n-4)! -2/(n-3)! = -2/3 -2 = -2/3(n-3) -2 = -2n/3 +6/3 -2 = -2n/3...
11. ### Solve the expression for n Є N

i just want to confirm if my answer is right.... this is the problem: solve the expression for n Є N P(2n + 4, 3) = 2/3P(n+4, 4) this is my work: (2n +4)!/((2n +4)-3)!) = (2/3(n+4)!)/((n+4)!)-4)!) (2n +4)!/((2n +1)! )= (2/3(n+4)!)/(n!) and i dont know wat to do next... should i...
12. ### Circular aperture

Here is the problem... Calculate the resolving power of a microscope with a 1.30cm aperture using 540nm light. The index of refraction of the lens slows the light inside the glass to 1.98x10^8m/s. i just know the formula tetha=1.22(lambda)/D, but i dont know how to derive the formula since i...
13. ### Help Single slit diffraction

Help!! Single slit diffraction heya all... this is the problem.. Predict whether violet light(lambda=404nm) or red light (lambda=702nm) will have a wider central maximum when used to generate a single-slit diffraction pattern. Calculate the difference if the light is incident on a 6.9x10^-5...
14. ### Magnetic fields and charges

Two oppositely charged objects exert a force of attraction of 8.0N on each other. What will be the new force of attraction if the objects are moved to a diustance four times their original distance of separation? i did this.. F=kq1*q2/4r 8.0N=9.0x10^9 (1)(1)/4r r=1.125x10^9m how can you...
15. ### Satellites again

another problem bout satellites... to exit the solar system, the Pioneer spacecraft used a gravitational assist from jupiter, which increased its kinetic energy at the expense of Jupiter's kinetic energy. If the spacecraft did not have assist, how far out in the solar system would it travel...
16. ### Satellites again

here is another problem... a 650kg satellite is to be placed into synchronus orbit around Earth. What amount of work must be done onthe satellite to raise it into synchronous orbit? i did.. W=GMm(1/r of Earth - 1/r of synchronous satellite) = 6.673x10^-11N m^2/kg^2...
17. ### Comparing escape velocities on Earth and Mars

The problem is.. the mass of MArs is 0.107 times Earth's mass and its raduis is 0.532 times Earth's raduis. how does the escape velocity on Mars compare to the velocity on Earth? i did this.. Vof escape = square root of 2G M(mars)/r(Mars) Vof escape is proportional to the square root of...
18. ### Energy of orbiting satellites

this is the problem... What is the change in gravitational potential energy of a 6200kg satellite that lifts off from Earth's surface into a circular orbit of altitude2500km? i did this... r = rE +h =6.38 x10^6m + 2.5 x10^6m r=8.88 x10^6m Eg= -GMm r...
19. ### Kinematics, energy & mometum

could anyone give a diagram problem which includes kinematics energy and momentum in one problem and then solve it.. i really need it today... thanks for helping me..