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Pleaseee, help I started doing this problem and got stuck...

Two cars leave a city and head in the same direction. After 3 hours, the faster car is 30 miles ahead of the slower car. The slower car has traveled 120 miles. Find the speeds of the two cars.

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Im stuck with this problem. I can't figure it out!

A funicular carries passenger up an embankment to an observation point. If the lenght of the track is 54.1 meters and the angle of inclination is 37°5', determine the height of the embankment.

Please somebody help me out!
Thanks

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Home >All Categories > Science & Mathematics >Chemistry >Open Question hijab Member since:February 19, 2010Total points:701 (Level 2)I do not understand this problem. Please someone help me.
Give the number of core electrons for O? The answer is 4Answer Question

by gag Member since:March 17, 2011Total points:245 (Level 1)8 electrons
2 in inner shell and 6 on outer shell
That is why it bond with 2 hydrogen to form watter.

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Home >All Categories > Science & Mathematics >Mathematics >Open Question .... Member since:March 28, 2011Total points:13 (Level 1)You are offered 2 jobs selling college textbooks. One company offers an annual salary of $25,000 plus a year-end of 1% bonus of your total sales. The other company offers an annual salary of $20,000 plus a year-end bonus of 2% of your total sales. How much would you have to sell in a year to make the second offer the better offer?Answer Question

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Paint used to paint lines on roads must reflect enough light to be clearly visible at night. Let µ denote the true average reflectometer reading for a new type of paint under consideration. A test of H0: µ = 20 versus Ha: µ > 20 based on a sample of 11 observations gave t = 3.2. What conclusion is appropriate at each of the following significance levels?

(c) a = .001

Explanation is greatly appreciated

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ar(1+r) = 280 ......... [ I ]
ar^4(1+r) = 4375 .... [ II ]

[ II ] / [ I ]
r^3 = 4375/280 which yields
r = 2.5
substituting in [ I ] yields a = 32

ans: a = 32, r = 2.5
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Home >All Categories > Science & Mathematics >Alternative >Paranormal Phenomena >Open Question Octavio Member since:December 24, 2007Total points:206 (Level 1)I'm going to be fairly straightforward: I need to rid of this poltergeist. I'ts haunted me since I was 5. It first started by making "lazy" noises such as rapping, footsteps. Then last December the couch was creaking, it tried to choke me, it moved my legs etc. The day before yesterday a few minutes after I went to sleep it made an extremely loud noise, it sounded like it dropped my boombox. Yesterday night after I came back from church I immediately heard it squeezing my water bottle which I had in my backpack, I had a notebook in my buro andI tought to myself that it would try to do something to my notebook so I put it in my backpack. I was watching King Of The Hill and the cable kept unplugging from the T.V twice and once this morning. Also when I was watching American Dad after King of The Hill I heard my notebook pages flipping loudly hence it was in my backpack. I had to sleep outside since I tought it might pocess me. It's seriously draining my life and I need help with ridding it.Answer Question

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Matt Member since:July 16, 2009Total points:108 (Level 1)In the bottom of an hourglass, a conical pile of sand is formed at the rate of 12 in.³ per minute. The radius of the base of the pile is always equal to one-half its altitude. How fast is the altitude rising when it is 6 in. deep?P.S.: Report the person who answered this first. He is simply ranting and that is against the community guidelines!2 minutes ago

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The Internet is not something that you just dump something on. It's not a big truck. It's a series of tubes. And if you don't understand, those tubes can be filled and if they are filled, when you put your message in, it gets in line and it's going to be delayed by anyone that puts into that tube enormous amounts of material, enormous amounts of material.

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I don't know much about cards so could someone help me?

If two cards are drawn from a standard deck of playing cards without replacement, find the probability that at least two are red?

I tried it out and I got 10/663 o,O isn't that way off? Could someone help me please!

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Mass of KxFe(C2O4)y · zH2O : 3.58 g
Mass of sample : 0.161 g
Mass of FeCl3 used in preparation : 1.60 g
Molarity of standard NaOH used : 0.0990
V1, volume of standard NaOH required for first equivalence point : 8.700 mL
V2, volume of standard NaOH required for second equivalence point : 17.70 mL

Calculate the mass of potassium in the sample

thanks so much

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v2 = 2^(½), and ½ = 2^(-1), so by rules of logs,

- ln 1/v2 = · · · · · · · power rule
ln (1/v2)^(-1) =
ln v2 =
ln 2^(½) = · · · · · · · power rule again
½ ln 2

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...to check your answer, substitute the value in the original equation. You should get a true statement if you have the correct value.

Show your work for confirmation !

qed

[x = - 2]

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I am having trouble how to do this:

Evaluate this limit using Taylor series:

lim x-->0 ((2cos2x - 2 + 4x^2)/2x^4) . This is 0/0 and you can use l'Hopital's rule but I am not supposed to as I am supposed to use Taylor series. Can anyone help me with a step-by-step?

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let g = golf balls:

$12g + $42,000 = $15g
subtract $12g from both sides;

$42,000 = $3g

Divide both sides by $3

14,000 = g

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I'm having a moment, and I just need a lil push lol. So this problem:

a rectangle with a perimeter of 30 cm is twice as long as it is wide. What is the area of the rectangle I'm square cm?

See easy right? But for the life of me I ant remember >:(

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Musicalr... Member since:July 12, 2008Total points:2,753 (Level 4)Parents with the genotypes AaBbCc and AaBbCc are crossed, what is the probability that the offspring will have the genotype AaBbCc? I got 1/27 (3.7%) when I made a punnett square, but my prof wants us to calculate this like she did in class. I wasn't there for the class; what I can tell from the powerpoint is that she did this:
AaxAa=1/2 Aa
BbxBb=1/2 Bb
CcxCc=1/2 Cc
I'm not sure if she then calculated the probability like this:
(1/2)*(1/2)*(1/2)= 12.5%
Which method is correct? How would you calculate the probability by using fractions? I need to show my work, and there's no way that I can have a 27 square punnett square for each problem. Thanks!!Answer Question

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