Mathematics - 7 June 2007

Sally is a surveyor in the badlands in South Dakota. At point A on the south side of a deep canyon, she sights across to a fire tower on the north side of the canyon at point B. Then she moves a measured 500 feet along the south rim of the canyon to a point C on a line perpendicular to her original sight line AB. Setting up her transit again, she finds that her line of sight, CB, to the tower is 83 degrees. Correct to the nearest whole foot, how far is point C from the tower?

2007-06-07 04:05:10 · 4 answers · asked by Olivia 4

x^2-8x+2

5m^2+m+2

2007-06-07 04:00:53 · 4 answers · asked by wltz4vns 1

i need help on a vlookup., i understand how to look up a single piece(cell) of information and copy that the another location workbook, but how do you lookup 2 or more values and copy 2 or more results back..

i know you can use mutiiple strings but iu dont get it...

If my original formula is :-
=VLOOKUP(A14,A:C,2,TRUE)

obviously if i am trying to copy across mutiply results into an existing workbook, i would need to specify or make sure that blank columns cells are available..

what about if i want to copy multiple results backfrom the above lookup...is this possible?

2007-06-07 03:57:11 · 1 answers · asked by Anonymous

SqRt(-13)

-SqRt(-49)

2007-06-07 03:52:21 · 3 answers · asked by wltz4vns 1

2007-06-07 03:46:38 · 9 answers · asked by Olivia 4

help thanks

2007-06-07 03:45:02 · 7 answers · asked by go play in the road 1

2007-06-07 03:40:40 · 5 answers · asked by Anonymous

please i need help on this quiestion (4z + 7)(6z + 7)

2007-06-07 03:38:37 · 8 answers · asked by Is 2

please i need help on this quiestion (2x + 1)(2x - 1)

2007-06-07 03:36:42 · 9 answers · asked by Is 2

find to the nearest degree all values of the interval 0 degrees 3cos2@+sin@ - 1=0.

I think it is one of the cos 2 A identities, but theres three, and Im not sure

2007-06-07 03:22:17 · 4 answers · asked by realio 1

Say i have:

5x-3=6

Now if I'm trying to find the exact solution would I try and get x alone so that the answer would be:

X=9/5

And what about
4(y-2)=10y+5

or

(2x-5)(x+8)=0

or

x^2-2x-8=0

or

8x^2-24=0

2007-06-07 03:12:42 · 6 answers · asked by taz073188 1

I have to solve

-2 ( e^(i*pi/4) - e^(i*pi/4))/(e^(i*pi/4) + e^-(i*pi/4))

I know that

e^(i*pi/4) = cos(pi/4) + isin(pi/4)
and I know that

e^-(i*pi/4) = cos(pi/4) - isin(pi/4) = 0

So for the first one, I get 1/sqrt(2) + i/sqrt(2)

Now it's more of a fraction question I guess, because I know the answer to the whole thing is

-2 ( sqrt(2)i / (sqrt(2)i)^2 = sqrt(2) i

My question is... what is the working out to go from

1/sqrt(2) + i/sqrt(2)

to get

sqrt(2) i

I must be missing something obvious, I just can't see it

2007-06-07 03:02:26 · 5 answers · asked by hey mickey you're so fine 3

please help me....




1. 8 palm
2. 10 hours
3. 12 steps
4. 15 yards
5. 6 arm lengths
6. 10 liters
7. 100 grams
8. 2 span
9. 25 meters
10. 10 foot

please help me please please...

2007-06-07 02:56:39 · 1 answers · asked by rockz 1

2007-06-07 02:53:50 · 4 answers · asked by chris r 1

If we consider the set of all possible isometries of a) a square, b) a non-square rectangle (an "oblong") which keep both the centre and the overall positions of all the vertices unmoved (i.e. no translations or glide reflections).
In each of the case, how many different isometries of the shape are there? And what would happen when we combine all possible pairs of these isometries?
Also,
In each case (a) and (b), does the full set of permitted isometries transformations form a group(with respect to the operation "Tranformation 1 is followed by Transformation B")?
And if they both form groups, are the two groups equivalent (in the same way that the "addition modulo 4" and "multiplication on {1, -1, i, -i}" were equivalent)?
How can I explain this?

I would appreciate any help! Thanks

2007-06-07 02:51:20 · 1 answers · asked by Anonymous

Terrible at maths...just can't figure it out....plus im sooooo busy.
10 points for the first one who answers



QUICK!!

2007-06-07 02:45:27 · 11 answers · asked by Anonymous

Friday odds in favor of rain is 3/5
Saturday odds against rain is 3 to 1
Sunday probaility of rain is 2/5
Which day is mostly likely to rain?

2007-06-07 02:37:24 · 9 answers · asked by Monokuro Boo 1

at least 14 had cd players. Exactly 9 had cd players. more than 17 had cd players. Which event a,b,c is most likely to occur?

2007-06-07 02:25:53 · 8 answers · asked by Anonymous

I passed with an A this year in accelerated Algebra II. That A was the hardest grade I have ever received in my life! I dont get why I dont get it right from the start. I still dont study but its getting difficult to get an A. Next year i have Pre-Calculus and that wont be much fun

2007-06-07 02:05:12 · 11 answers · asked by triathelete1991 2

How would I find a formula for the sum of the first N natural numbers
and
prove that the sum of the first n cube numbers (i.e. the sum of the cubes of the numbers 1,2,3,...,N) is equal to the square of the sum of the first N natural numbers. (by Mathematical Induction).

2007-06-07 01:52:45 · 6 answers · asked by Anonymous

solve for s and p given that: 5^p*25^s = 1 and 16^p/2^s = 2

2007-06-07 01:38:09 · 5 answers · asked by Anonymous

y = |x|

what are the x and y intercept(s)?
i know it's the basics but i've totally forgotten how to deal with determinants. please help.

2007-06-07 01:28:45 · 8 answers · asked by Kendra 3

it is mathematics question .
Pi is a constant and its approxmiate value is 3.14

2007-06-07 00:49:58 · 3 answers · asked by jitu 1

If "n" is a positive integer and W a complex number such that (W^n)=1, but W≠1.
What is it possible to say about S=1 + W + W^2 +.....+ W^(n-1)

2007-06-07 00:36:54 · 12 answers · asked by robert f 1

2007-06-07 00:23:17 · 9 answers · asked by kirek 1