Mathematics - 20 November 2007

2007-11-20 08:02:51 · 4 answers · asked by germanmonkey1 1

Science and medicine. Ariana took 2 h longer to drive 360 mi on the first day of a trip than she took to drive 270 mi on the second day. If her speed was the same on both days, what was the driving time each day?
so how do I go about doing this problem can you show me step by step so i can do another one kind of like it? thanks

2007-11-20 07:59:47 · 2 answers · asked by blue_eyed_woman_23 3

2007-11-20 07:57:30 · 4 answers · asked by pol7 1

What is 32 to the 2/5th power?

and how do you find that answer?

THANKS!

2007-11-20 07:57:22 · 2 answers · asked by Anonymous

Please explain it to me, I am uneasy about these questions.

2007-11-20 07:56:28 · 9 answers · asked by Sarah I 2

A stone is thrown at 45degrees to the horizontal. It reaches its peak height after 1.50 seconds.

find (a) the vertical component of its initial velocity
- I done this and got 20.81m/s?

(b) the horizontal component of its initial velocity
- Would I be right in thinking this is the same as the vertical component (20.81m/s) as it is at an angle of 45degrees?

(c) the horizontal distance from the point where it was thrown to the point where it hits the ground.
- 62.43m? I assumed that my previous answer was right.

Also:
A rope is pulled with a 600N force attached to a boulder. The rope makes a 30degrees angle with the direction in which the boulder is travelling. Find the force which is pulling the boulder forwards and the force with pulls it sideways.

-Would this just involve finding the vertical and horizontal components? So 300N and 519.6N respectively?

Thanks a lot for your time =)

2007-11-20 07:53:25 · 2 answers · asked by Anonymous

There are 7 girls on a bus

Each girl has 7 backpacks

In each backpack, there are 7 big cats

For every big cat there are 7 little cats

Question: How many legs are there in the bus?

2007-11-20 07:50:51 · 14 answers · asked by Kristin H 1

Determine whether the series converges or diverges?

2007-11-20 07:39:20 · 2 answers · asked by Steve 1

Urn A contains six white and seven black balls. Urn B contains three white and eight black balls. A ball is drawn from urn A and then transferred to urn B. A ball is then drawn from urn B. What is the probability that the transferred ball was black given that the second ball drawn was white?
If necessary, round your answer to two decimal places.

2007-11-20 07:31:31 · 1 answers · asked by Anonymous

pile in the shape of a cone whose base diameter and height are always equal.How fast is the height of the pile increasing when the pile is 10 ft high?

2007-11-20 07:20:45 · 1 answers · asked by asddas a 1

A customer at Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 40 oranges, of which 4 are rotten. What is the probability that the sample contains 1 or more rotten oranges?

2007-11-20 07:18:03 · 4 answers · asked by Anonymous

2007-11-20 07:02:16 · 9 answers · asked by shawna 2

The number of ways of choosing 4 people from 12 is the same as the number of ways as choosing 8 people from 12 people. I don't understand this. Can someone explain why these tasks can be done in the same number of ways?

My logic just don't understand this, but I do know it is true.

2007-11-20 06:59:53 · 2 answers · asked by Lisa 4

A machine produces open boxes using square sheets of metal. The machine cuts equal sized squares measuring 3 inches on a side from corners and then shapes the metal into an open box by turning up the sides. If each box must have a volume of 75 cubic inches, find the length and width of the open box

2007-11-20 06:56:07 · 6 answers · asked by laker19 1

2007-11-20 06:53:27 · 6 answers · asked by PDF 2

2007-11-20 06:51:17 · 4 answers · asked by draydaze 2

the length is 6cm and width 10cm and the mini squares are 3cms

2007-11-20 06:46:33 · 1 answers · asked by Anonymous

2007-11-20 06:40:57 · 9 answers · asked by Ken B 1

http://img104.imageshack.us/img104/281/distilexs3.jpg
Then figure out 120*Tan(A)-120*Tan(B)



It should be fairly simple but whatever i'm doing wrong, I get a negative value

2007-11-20 06:39:02 · 2 answers · asked by Anonymous

Make c the subject:
a) V = (x^2*c)/3

b) V = (c^2*h)/3

c) c - 4e^2= 5 - 2c

2007-11-20 06:38:27 · 6 answers · asked by ra_liv93 1

The sum of an integer and three times the next cinsective integer is 51. Find the integers.
The sum of a number plus half of itself is 18.25, find the number.
The area of a triangle is 30 sq m. if the base is 15 meters, find the height od the triangle.

2007-11-20 06:35:51 · 4 answers · asked by Maikeru 4

(5+12i)/(8+9i)

2007-11-20 05:46:08 · 3 answers · asked by evosteo 2

(5+12i)/(8+9i)

2007-11-20 05:45:45 · 2 answers · asked by evosteo 2

consider flipping an unfair coin. the probability of getting a head is 6/10. the probability of getting a tail is 4/10. determine how many times we need to flip the coin such that 50% are heads.
for example, how many times you need to flip the coin so that out of all total number of flips, you'll end up with half of them heads.

2007-11-20 05:25:03 · 2 answers · asked by Anonymous

when a salesperson makes a sale, a record is created that includes the date,time and dollar amount of the
salespeople:Edwards,Rogers,Krybek,Delaney,LaFleur,Smith,Black. The pseudocode has to list totalsales,totalcommissions earned by all salespeople for time frames bade on the hour of the day(00-05.06-12,13-18 and 19-23)
here is a tabel that migth help:
FILE DESCRIPTIO: DECIMALS: SALEAMOUNT: RATE:
salespersons num $0 to&50,000 .04
moth num $51,000to$200,000 .05
day num $126,000to$200,000 .06
year num $201,000and up 0.7
time num
saleamount num

2007-11-20 04:48:25 · 1 answers · asked by Robert C 1

Savannah left Miami and drove at a speed of 47 mph. Timothy left 2 hours later, from the same point, and drove at a speed of 58 mph. How long will it take Timothy to catch up with Savannah?

8.55 hours
9 hours
6 hours
7.5 hours


I really don't understand how to do this thing.
Someone min helping and explaining?

2007-11-20 04:39:33 · 1 answers · asked by Keti 1

Let (X, M u) be a measure space, where X is a set, M is a sigma-algebra on X and u is a measure defined on M. Let f_n be a sequence of functions defined on X and with values on [0, oo] such that lim f_n = f. Suppose that lim Integral f_n du = Integral f du < oo (the integrals taken over X). Show that, for every set E of M, Integral_E f_n du = Integral_E f du, where Integral_E means integral over E. Also, show that this conclusion may fail if we have lim Integral f_n du = Integral f du = oo
Thank you for any help.

2007-11-20 04:18:16 · 1 answers · asked by Sandra 1

2007-11-20 04:12:55 · 4 answers · asked by Ginger 2

but not like on this web page http://mathforum.org/library/drmath/view/67312.html
thx

2007-11-20 04:10:59 · 8 answers · asked by kzkei 2

How do I do this? I have been stuck on this for days.

2007-11-20 04:04:42 · 1 answers · asked by Anonymous