Could someone help me with some math?
1. Three boxes, A, B, C, had 260 ping pong balls. Lisa added some ping pong balls into box and the number of ping pong balls tripled. She took out half of the ping pong balls in box B and added 40 to box C. The ratio of the number of ping pong balls in boxes A, B, C became 6:4:5. Find the original ratio of the number of ping pong balls in boxes A, B, C. 2. Three painters, all working at the same rate, paint 2/3 of a house in 6 hours. The following day only one painter returns. How many hours will the painter take to finish the job if he works at the same rate as before? 3. The Hubble constant, HO, is the ratio of recessional velocity of a galaxy to its distance. the Hubble constant is estimated to be 70km/sec per million parsecs of distance. (one parsec is equal to 3.26 light years.) Based on this ratio, how many billions of light years away would a galaxy be if it had a recessional velocity of 300,000 km/sec? Express your answer to the nearest whole number.
Asked By: Anthony W - 7/26/2007
Best Answer - Chosen by Asker
question no. 1: the problem ends to a set of triple equations and triple unknown values. but the set has no real root... More
Answered By: kargadan707 - 7/26/2007
Additional Answers (3)
3A = 6/15 B/2 = 4/15 C + 40 = 5/15 Express B and C in terms of A: 6C + 240 = 15A, or C = 2.5A - 40 3B = 12A, or B = 4A so A + 4A + 2.5A - 40 = 260 ==> A = 40 then B = 160, and C = 60. so ratio is 2:8:3 1/3 house is done in 3 hours with three men so 9 hours to complete the last 1/3 with one man.
Answered By: John V - 7/26/2007
3A = 6/15 B/2 = 4/15 C + 40 = 5/15 Express B and C in terms of A: 6C + 240 = 15A, or C = 2.5A - 40 3B = 12A, or B = 4A so A + 4A + 2.5A - 40 = 260 ==> A = 40 then B = 160, and C = 60. so ratio is 2:8:3 1/3 house is done in 3 hours with three men so 9 hours to complete the last 1/3 with one man
Answered By: JackJack - 7/30/2007
Let box A have A balls, box B have B balls and box C have C balls whence we have... More
Answered By: sv - 8/2/2007
Over 483 Local Jobs Now Hiring In Your Area. $18-$87/Hr - Apply Today!
Shop Online or Sign Up To Sell AVON & Earn Fast Cash Today!
$21/hr Start, Avg Pay $72K/yr Check Our Map of the 1700 Openings.
Click. Search. Apply. Free!
Other Career Questions
Do most mechanical engineering jobs offer job security?
What is your current job? Why did you choose this job? What do you enjoy about your job? What do you dislike about your job? What would be your perfect job? Would you rather have this j...
Where are the jobs? Is productivity and globalization creating a permanent “recession” of jobs? My main issue is I am doing a paper for school and have no idea where to begin. I was hoping suggestions...
Content is not owned or controlled by Monster. Any content concerns should be addressed with Yahoo!
Yahoo! Does not evaluate or guarantee the accuracy of any Yahoo! Answers content. Yahoo! Disclaimer.
Best-Paying Work-from-Home Jobs
It’s easier than ever to work from home. Of course, not every job is a mobile job, and some companies aren’t interested in having their employees work from home.
2013 Marketing Jobs Outlook
The US may be facing another year of anemic hiring overall, but that won't be the case in the high-orbit world of multichannel, digital media marketing.
2013 Engineering Jobs Outlook
Engineers will find job opportunities in select disciplines in 2013, with candidates who are all-around, client-oriented businesspeople in demand.
Best-Paying Jobs by Major
What could you earn with a particular four-year degree? Find out by checking out this list of the top-paying jobs for 20 of the most common majors.
Eight High-Paying, Secure Jobs
Want to earn a good salary and enjoy a measure of job security as well? Check out these well-paying jobs on tap for fast growth in the coming years.