All Answers

GuestDec 4, 2013

+40

Thank you sooo much, and I think you're someone special.

OliveDec 4, 2013

Estimating I'd say:

1.) b. (Even though the train is moving, the rock won't fall all the way behind. Perhaps slightly off, though.)
2.) a. ( 9.8 m/sec ² of gravity will increase it's speed)
3.) d. ( same as ^ but it will decrease by that much per second)

^_^

GuestDec 4, 2013

No, not really. You?

GuestDec 4, 2013

The average pregnancy lasts nine months. Since October is the tenth month of the year a baby born in October was probably conceived the same year.

^_^ Hope this helps!

GuestDec 4, 2013

Could you describe the sail better? Like, which side is '2' ? And which angle is 40?

GuestDec 4, 2013

+154

Thank you Misz.Lopez for the encouraging answer and welcome to this forum. That's the exact attitude I was hoping to see in users when I first clicked onto this .

JedithiousDec 4, 2013

Guest:
W*F R U 5 U DONT KNOW THIS DAYUUUUUUUUUUUUUUMMM JUST DAYYYYYYYYYYUUUUUUUM AND UR ALSO GAYYYYUUUUUUUMMM STFUGSTFOBUTCHASSNUGGALPOL GAWWWWWWWWWWWWWDDDDDDDDDDDDDDDDDDDDDDD F**K U

Did you even try to finish grade school? This problem is child's play!

Magnetic force law: F = qv x B (cross product); F is the force pulling the proton to the earth, q is the charge of the proton, v is the velocity of the proton, and B is the magnetic field. Since we are working with objects near the surface of the earth, the cross product is simply a product.

Now, what is F? The force pulling the proton, which is moving at a constant velocity, into a circular rotation. Wait a minute, that sounds like centripetal force! F=mv^2/r, as we all know, and that F equals the F from the previous equation. Thus, F = qvB = mv^2/r.

Well, wait, now we have v on both sides. Since we can divide both sides by the same value without damaging the equality, we can get qB = mv/r. Now we can solve for v to find the speed of the proton:
v = qBr/m
q = 1.602*10^-19 As
B = 4*10^-8 kg/As^2
r = (radius of earth) +900km = 7.2675*10^6m
m = 1.6726*10^-27kg

v = (1.602*10^-19)(4*10^-8)(7.2675*10^6)/(1.6726*10^-27) (kgmAs)/(As^2kg) = 2.784*10^7 m/s

See? Simple.

GuestDec 4, 2013

We see that 12 is 3 times larger than 4. (12/4 =3)
This implies that that scale factor must be 1/3.

GuestDec 4, 2013

Guest:
how do i find a slope from two coordinate pairs that are fractions

Hi,
all you have to do is find the rise over run which is delta x over delta y, then you will divide the number y over x.

GuestDec 4, 2013

you just use the fraction method so 2/3 - 4/7 you find the common dominator which is 21 so you times 2/3 by 7 and 4/7 by 3. It is now 14/21 - 12/21 which equals 2/21 aka the slope

GuestDec 4, 2013

This might be a bit long.

I'm assuming you're trying to find the length of the median. ^_^

Draw a graph and mark the points you're given.

R = <3, 3>
S = <-1, 6>
T = <1, 8>

Median: a line that goes from a vertex of a triangle and bisects (cuts in half) the opposite side.

On your graph, draw the median from point R to X ( which is the center of the line ST ). To find X, find the midpoint between S and T; you can find this by finding the respective midpoints of the x- and y-components.

S _x = -1, T _x = 1, Midpoint _x = 0
S _y = 6, T _y = 8, Midpoint _y = 7

X = <0, 7>

To find the length of the line, use the Pythagorean Theorem: a ² + b ² = c ², where c is the hypotenuse and a and b are the legs. In this case, imagine a triangle formed between R=<3,3> and X=<0,7>, with the third point at <0,3>. This creates a right triangle, with two legs of lengths 3-0=3 and 7-3=4. 3 ² + 4 ² = c ², then find c.
This particular right triangle is a special case, because three squared plus four squared equals exactly five squared. In math stuff: 3 ² + 4 ² = 5 ². This means that the length of RX is five.

^_^ Hope this helps!

GuestDec 4, 2013

No one cares. Go spam youtube, kiddo.

GuestDec 4, 2013

It depends on what calculator you have. On my calculator I have a button [s-d] which converts the answer back and forth from fraction to decimal.

GuestDec 4, 2013

Solving inequalities like this is pretty much like solving equations. When you are using addition and subtraction, the rules are the same. You can add or subtract any number as long as you do it for both sides.

r + 9.3 > 4.2
(subtract 9.3 from both sides)
r > - 5.1

^_^ Hope it helps!

GuestDec 4, 2013

$4.80 divided 24 ways.

$0.20 each.

^_^

GuestDec 4, 2013

No, melody is right.

GuestDec 4, 2013

Ni Hao! Feel free to speak whatever language you like, its a free country for heaven's sake! But for the record I don't know what the h**l you said! XD

GuestDec 4, 2013

Its 22 b***h.
Ha ha if you believed tht..... its 4!

GuestDec 4, 2013

His mother, poor dad BTW. (tear).

GuestDec 4, 2013

F**k no this tooo easyyy!!! figure it out yourself or just use a calculator. Same as the guy on the top said, H**L TO THE NO B***H!!!!!!

GuestDec 4, 2013

Here's how you do it: First get on your calculator, a normal one, and press "1" on your calculator, followed by the "+" (plus) sign. The "1" symbolizes the whole number of the mixed fraction. Input the numerator, or the top number of the fraction. For this example, it would be the number five. Press the "÷" (divided by) button and enter the denominator, which would be "7", if following the example of 1 and 5/7. Your screen should read "1+5/7."

Read more: http://www.ehow.com/how_8353151_type-mixed-fraction-ti83-plus.html#ixzz2mSlphXYA

Hope it helps! XD
P.S: the following instructions are for the TI-83 Plus!

GuestDec 4, 2013

If the equation equals zero then this is how you do it:

1/2x - 5 + x - 10 = 0
(add 10 to both sides)
1/2x - 5 + x = 10
(add 5 to both sides)
1/2x + x = 15
(add the x's)
1 1/2x = 15
(divide both sides by 3/2 (1 1/2) or multiply both sides by 2/3)
x = 10

^_^ hope it helps!

GuestDec 4, 2013

15 and 1000 both contain a factor of 5, so you can cancel it out
15 divided by 5 is three
1000 divided by 5 is 200
so the answer is 3/200

kellrobinsonDec 4, 2013

#16

Numbers ending in zero are the obvious case, now let´s solve the other cases
Let the variable n represent the new number you get after cutting off the last digit.
Let the variable d represent the last digit.
The original number is (10*n)+d
the problem says the original number is divisible by n
which means (10*n)+d is divisible by n
((10*n)+d)/n = 10 + d/n
that means d must be a multiple of n
for example, try the number 24
4 is a multiple of 2, so it works. Check it
cut off 4, the new number is 2, which divides into 24
11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 24, 26, 28, 33, 36, 39, 44, 48, 55, 66, 77, 88, 99 all work
and of course any number ending in 0
so it looks like we are limited to two-digit numbers and numbers ending in 0

kellrobinsonDec 4, 2013

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