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July 30, 2014

July 30, 2014

Posted by **Anonymous** on Saturday, August 21, 2010 at 11:56am.

up to train A.

- MATH -
**bobpursley**, Saturday, August 21, 2010 at 12:04pmwhen B gets to station, A is this far ahead:

distance: 1/4 hr*40mph= 10 miles.

So, to make up that 10 miles, B is traveling at a*relative*velocity of 20 mph (60-40)

time= distance/velocity= 10/20 hr

- MATH -
**bobpursley**, Saturday, August 21, 2010 at 12:05pmso, add that time, 30 min, to 8:35

- MATH -
**Anonymous**, Saturday, August 21, 2010 at 12:28pmIn 1994, the life expectancy of males in a certain country was 73.8 years. In 2000, it was 77.4 years. Let E represent the life expectancy in year t and let t represent the number of years since 1994

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