What is the smallest n such that it is impossible to select n coins that make exactly a dollar?
Q. Your math teachers are feeling generous and each student is given n>0 of each of the standard denomination Canadian coins: 1 , 5 , 10 , 25 , 50 , and the always fun $1. Your nath teachers are feeling generous and each student is given n>0 of each of the standard denomination Canadian coins: 1 , 5 , 10 , 25 , 50 , and the always fun $1. What is the smallest n (# of coins) such that it is impossible to select n coins that make exactly a dollar? n = number of coins
Asked by moikiss16 - Wed Sep 26 04:07:50 2007 - - 4 Answers - 0 Comments

A. You will only reach 86 cents it can't be done unless you double a coin which is not allowed in this problem. If there was a Seventy five cent piece it could be done with a seventy five cent pieve and a quarter. But because it stars at a half dollar it can never reach a dollar. If there was a 70 cent piece it it could be done with a 70 a 25 and a 5 that would equal a dollar. With the current coins there is no way to reach a dollar without having more than one of the same coin.
Answered by Wade C - Wed Sep 26 04:38:11 2007

What is the value of n in which the electron originated?
Q. An electron in a hydrogen atom relaxes to the n=4 level, emitting light of 74 THz. What is the value of n in which the electron originated? I am very confused as to how to do this problem. Could someone please show me the steps how? -Thanks I need the steps on how to do it. I have no idea how to plug in anything or convert or anything.
Asked by ohbaby! - Sat Nov 21 23:08:56 2009 - - 1 Answers - 0 Comments

A. Use the Rydberg equation: 1/lambda = R[ (1/n1^2) - (1/n2^2)] In order to find the wavelength of light needed to plug into the equation, use your universal wave equation c = nu x lambda nu is your frequency in hertz, c is your speed of light. When you sub in your n1=4, solve for the other n. --- R = 1.096776 x 10^7 m^(-1) c = 3.00 x 10^8 m/s
Answered by arronstar - Sat Nov 21 23:21:03 2009

How can i get rid of my pigmentation occurin on my face,back n hands?
Q. I m just 24+ n havin pigmented black scars which are increasing day by day n itches also.I hav visited a lot of dermatologist bt the medication hasn't helped,got a biopsy done on the back n reports says that i ts due to some pigment concentration called litchen, m takin glycolic peels on my face ,back n hands which has lighten the complexion on hands bt not on face, all the dermatologist says its due to sun exposure but it cant be fully true as the area on my back is seldom exposed, n m working so its not possible to avoid sun completely.Please suggest me a remedy as i m very depressed n losin my face value n want to regain my glowing complexion,i m suffering from acnes havin pus n also suffer from constipation but try to keep my system… [cont.]
Asked by richa - Tue Jul 25 13:38:30 2006 - - 3 Answers - 0 Comments

A. I think you need to start at the Psyhcotherapists to deal with your low self esteem. You must learn to love yourself and not to worry about others. It sounds like you use a lot of products , and that must be touching your face.. which is possibly leading to the spots (acne)? Try to stop using the chemicals on your skin altogether it cannot be helping. Stick to completely unperfumed products The vitamins Carofit, does it have a side effect of constipation? Check on the net for side effects of taking that vitamin. Eat more fibre and fresh fruit and green vegetables. If you can't eat them, then buy smoothie fresh fruit drinks. This will help your skin and your digestion. Eat a bowl of Bran flakes before bed. Just a small amount should… [cont.]
Answered by super_star - Tue Jul 25 13:49:39 2006