All Answers

GuestAug 26, 2013

3 mg (milligram, milli means "one thousands part") is 3/1000 g, which is 0.003 g.
Hence, 0.68 g is larger than 3 mg.

GuestAug 26, 2013

Aug 25, 2013

please help me with this.. what is 2.750.389 in scientific notation?

GuestAug 25, 2013

+104

200 km of an orbit are mostly a straight line, therefore it's extraneous.

Station A: (0, 0)
Station B: (200, 0)

Build two linear equations (rem. f(x) = mx + t)
m = dy/dx = tan(n)

=> First lin. equation of Station A: f(x) = tan(23°)*x
Second lin. equation of Station B: g(x) = tan(55°)*(x-200)

Solve f = g for x
tan(23°)*x = tan(55°)*(x-200)
=> tan(23°)/tan(55°) = (x-200)/x = 1-200/x
=> x = 200/[1-tan(23°)/tan(55°)]

Insert x into f(x):
f(200/[1-tan(23°)/tan(55°)]) = tan(23°)*200/[1-tan(23°)/tan(55°)] = 120.8 km

This would result into:

Another solution would occur, if you set the angle of g(x) to 180-55°. Station B would face the opposite direction.
=> f(200/[1-tan(23°)/tan(125°)]) = tan(23°)*200/[1-tan(23°)/tan(125°)] = 65.44 km

Which would lead to:

BUT a satellite in about 65 km height is unrealistic, so it has to be the first one.

ApfelkuchenAug 25, 2013

I guess you speak of triangles?
Its impossible without further info.
For example: if you have a tris with sides a, b, c and angles alpha, beta, gamma.
Then you could compute gamma if you know a, c and alpha by the law of sine:
a/alpha = c/gamma

greets silentbat

GuestAug 25, 2013

And the question is..?
What this yields? -> paste it in the calc if you want to know...
greets silentbat

if you want to simplify it in other ways i would recommend wolframalpha or maple/maxima.

GuestAug 25, 2013

Hm are you sure about that?
I would have said that, if the equation had been y = (-x)^2.
As it is y = -x^2, i would guess what is meant is - (x^2).
greez silentbat

GuestAug 25, 2013

That is, taken into account a rounded surface ( = globe/earth) or should both stations sit on a flat surface?
greets silentbat

GuestAug 25, 2013

Amy:):
To convert from Standard Form to Scientific Notation: You move the decimal place either left or right to make the only whole number in the "ones" column.
For example:
12340000000 in Scientific Notation is 1.234 x 10^9 (^ meaning to the power of).
or
0000001234 in Scientific Notation is 1.234 x 10^-6 (^ meaning to the power of).

0000001234 is the same as 1234. 1234 = 1.234 * 10^3
0.000001234 = 1.234 * 10^(-6)

GuestAug 25, 2013

just punch it into the calculator as is in scientific notation )

GuestAug 25, 2013

To convert from Standard Form to Scientific Notation: You move the decimal place either left or right to make the only whole number in the "ones" column.
For example:
12340000000 in Scientific Notation is 1.234 x 10^9 (^ meaning to the power of).
or
0000001234 in Scientific Notation is 1.234 x 10^-6 (^ meaning to the power of).

GuestAug 25, 2013

Aug 24, 2013

Hmm - almost.

4 - (-6) is indeed positive 10.

But when you divide a positive number by a negative number (-5), the answer is negative.

So you want -2

GuestAug 24, 2013

if sub=substitute, then use y=(-(2))^2

GuestAug 24, 2013

Ignore the last post, that is the factorial symbol