Mathematics - 4 July 2007

integrate: 2/squareroot (1-25x^2)

there are two methods i know:

Using the long method, my answer is 2/5sin^-1 5x + C

Using the short alternative method, my answer is 2sin^-1 5x + C

Which answer is correct? Please justify ur explanation & can you derive a conclusion or something. thx

2007-07-04 02:50:02 · 2 answers · asked by Kendra 3

My sorority sister told me that there is a good job available at her workplace. The glitch is that I don’t have a car and there is no public transportation to get there. So, I need to find out how far it is and see if it is possible to walk there. Rarely, I’ll be able to get a ride with my friend, but it will be hard as we might have different schedule.

She isn’t sure how fast she drives, so I just ask about her driving style. She has a 1992 Toyota Celica with a 2.2-liter, 135 hp, I4 engine and a 5-speed manual transmission. She mentioned that she usually keeps it in 4th gear and if she needs to pass another car, she would change to 3rd gear. The route is mostly a straightaway, on a side road and she would drive at a constant speed for 30 minutes.

1.Roughly, how far is it?

2.Is walking realistic?

3.Roughly, how fast does she drives?

2007-07-04 02:49:00 · 5 answers · asked by Kate 陳玉萍 2

An engine pulls a train for 120 km. A second engine which travels 5 kph faster than the first then pulls the same train for 240 km. Find the speed of each train, if it takes 6 hrs. to cover the entire 360-km-stretch.

2007-07-04 02:14:25 · 5 answers · asked by chopin 2

If anyone knows, please help. I have to answer this in the form of a rational expression. This is not like algebra 14 years ago. Man oh man!! Thanks in advance to all of you math genuises. :)

2007-07-04 02:10:54 · 9 answers · asked by Poetry 1

the function f is defined as f(x) = 2x+3 / x-1 when x is not 1

xpress f(x) in the form f(X) = a + (b/x-1)

wer a and b are constants

2007-07-04 01:51:16 · 2 answers · asked by mk_ultra_mo 1