Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 1,730

**MAth Probability**

Determine the probability of each of the following types of poker hands a. Two pairs (two cards of one denomination, two cards of a different denomination, and one card of a denomination other than those two denominations) b. One pair (two cards of one denomination and three c...

**Math Probability**

A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent? I understand it is like the birthday problem, I just do not understand how to solve it still.

**Math Probability**

What is the probability that a student applied to THREE OR MORE colleges? with the chart Num. Applied Probability 1 .17 2 or less .29 3 or less .43 4 or less .59 20 or less 1

**Math **

A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent?

**intermediate algebra**

The third angle in an isosceles triangle is 1/2 as large as each of the two base angles. Find the measure of each angle.

**intermediate algebra**

The third angle in an isosceles triangle is 1/2 as large as each of the two base angles. Find the measure of each angle.

**Physics**

A 6490 kg helicopter accelerates upward at 0.59 m/s2 while lifting a 1180 kg car. (a) What is the lift force exerted by the air on the rotors? N (b) What is the tension in the cable (ignore its mass) that connects the car to the helicopter?

**chemistry**

thanks

**chemistry**

how would i set this up? chelste's diet restricts her intake of protein to 24 g per day. if she eats an 8.0 oz burger that is 15.0% protein, has she exceeded her protein limit for the day? How many ounces of a burger would be allowed for chelste?

**Math: Algebra**

Landon can climb a certain hill at a rate that is 2.5 mph slower than his rate coming down the hill. If it takes him 6 hours to climb the hill and 45 minutes to come down the hill, what is his rate coming down?

**physics**

If someone kicks a soccer ball across a flat parking lot with an initial velocity of 19.0m/s @ 19 degrees, how long will the soccer ball be in flight and how high above its launch point will the ball go? What would be the x and y components of this velocity at t=0.

**trig**

Prove (1+secx)/(tanx+sinx)=cscx

**Trig**

Solve the following trig equation 2cos(x-π/6)=1

**Trig**

Prove (1+secx)/(tanx+sinx)=cscx

**Calculus**

Consider the curve -8x^2+5xy+y^3=-149 1. Find Dy/dx 2. write an equation for the line tangent to the curve at the point (4,-1)

**math**

The day started out at 16 F and ended at 25 F. Find the percent change for the temperature throughout the day?

**anatomy**

I have tried to search this and I can't find anything on this. Can you please help?? Name the structures that can be seen in the elastic cartilage?

**chemistry**

how much ice would i have to eat to l lose 10% of my body weight?

**phyics 2**

Remarks The gravitational force between the charged constituents of the atom is negligible compared with the electric force between them. The electric force is so strong, however, that any net charge on an object quickly attracts nearby opposite charges, neutralizing the objec...

**Economics**

4. Which of the following statements are positive in nature and which are normative? a. A tax cut will raise interest rates. I think it is Normative Economics

**math**

Jason bought a laser printer that regularly sells for $ 649.99AT THE MARKDOWN RATE OF 35%.What is the final selling price

**Excel**

The correct answer is A - Styles gallery.

**math**

what are these words unscrambled: untoegrnc visteiop unrlerpadecpi please help

**chemistry**

Balance the equation NH3 + O2 −→ N2 + H2O Given 4.55 mol of the reactant NH3, determine the corresponding amount of O2.

**Physics**

A 145 m long ramp is to be built for a ski jump. If a skier starting from rest at the top is to have a speed no faster than 22 m/s at the bottom, what should be the maximum angle of inclination?

**Physics**

It takes 0.220 s for a dropped object to pass a window that is 1.14 m tall. From what height above the top of the window was the object released?

**Biology**

What is the difference between thromboplasin and factor Xa? I have in my notes that they both convert prothrombin to thrombin.

**Algebra**

Solve: squareroot 2x-1 - squareroot x+3 = 1 please show steps

**Algebra**

Solve (x-1)^2 = 16 please show steps

**alg II**

linear functions if g(fx) = 2x+6 f(gx) is a line through origin what is f(g2011)

**ALGEBRA**

Solve (x-1)^2 = 16 show steps

**Algebra-HELP**

Solve: squareroot 2x-1 - squareroot x+3 = 1 show steps

**Physics**

A bathtub of icy water at 32 degrees farenheit holds 17 gallons. You put in a 25 pound watermelon with a temperature of 100 degrees farenheit. If you wrap the tub completely in blankets so it does not lose any heat, what will be the final temperature of the watermelon? (Rememb...

**Physics**

80*1kg?

**Humanities**

Why does a teacher needs to have a grasp of students social setting and the condition in which they live?

**accounting**

What is the acid test ratio? Is it the same thing as the quick ratio?

**Math**

Bond : Face Value = 100,000 State Rate = 9% Semi-annual Payments Term = 3years Market Rate of 12% Amortize the bond to determine: Year 1 Interest Expense End of Year 1 carrying value. My Answers: Year 1 Interest Expense = 5,621.05 End of Year 1 carrying value =94,805.14 Am I c...

**algebra**

3x-y=25 x+4y=-22 3x-y=25 -3x-12y=66 -13y=91 y=-7 x+4(-7)=-22 x=6

**Physics**

Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg pe...

**physics**

A 2.9 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.0 with the horizontal. An average frictional force of 4.2×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.6 m...

**Math**

Reduce the fraction to simplest form 2x+2/6x^2+16x+10 (the 6x is squared I think thats how you show it)

**math**

the third and fourth terms of the sequence are 21 and 38. If the second differences are a constant 2, what are the first five terms of the sequence?

**Chem**

Oh, alright. I'm sorry then. XD

**Chem**

Why wont you answer my previous q Dr. Bob? D:

**chemistry-help!**

The initial rate of reaction for H2O2(aq) <-> H2O (l) 1/2 O2 (g) is found to be 1.7x10(-3)M/s. Assume that this rate holds for 2 minutes. Start with 160ml of 1.60 M H2O2. How many milliliters of O2 measured at 24C and 760mmHg , are released from solution in the first min...

**Chem-Repost**

it wouldn't let me post after putting spaces in the url and everything, so i just copied and pasted the q instead :P sorry for all the messyness. i'll see if i can delete q's, in the mean time you can maybe look at this please? Initial rate of rxn of H2O2(aq)->H...

**Math**

7/8 is about 1, 3 1/4 is about 3, 1+3=4? And follow the same pattern for th rest. That's how i would estimate it :s And an example for division is 9 5/6 is about 10, 2 1/8 is about 2, 10 / 2 = 5. Hopes this helps

**Chemistry**

Using grammatically correct English sentences describe how the nature of the bonding in MgF2 (s) and Zn(s) differ. (Don't just name the different types of bonding-describe how they are different. Which of the following are metallic? F2(g), Co(s), NaCl(s), H2O(s), C6H6(l) (...

**physics**

A 83-kg worker clings to a lightweight rope going over a lightweight, low-friction pulley. The other end of the rope is connected to a 66-kg barrel of bricks. If the worker is initially at rest 16 m above the ground, how fast will he or she be moving when he or she hits the gr...

**Chemistry**

It doesnt let me link stuff :c But its the chemsitry toughhh q And i hope you are not typing the answer while i post this XD (sorry if thats the case) Thanks again

**Chemistry**

I just wanted to clarify that although Cody did respond to my question, we were still unable to determine the solution. I will post a link to the question in a minute. (i noticed you replied to the other posts a bit ago, but i hope im not being too abrupt. Just verifying :P)

**physics**

im guessing PE is potential energy eqn is PE=mgh 20N is weight of cat, which is equal to Fg, which really is Fg=mg so simply mgh=20x5=100. The cat's kinetic energy is = .5mv(2) (the two is a superscript, meaning the v is squared) Regardless it's velocity is = to 0 when...

**Physics**

m1v1=m2v2 You have mass and velocity of car (lets designate that m1 and v1) and mass of ball (lets say thats m2). Solve for v2.

**Physics**

Its another momentum problem similar to your other post. Since there is only two 'fragments' from the 'explosion' :P you can disregard the angle for the velocity and act like they are horizantal to each other. If you dont want to disregard the angle, then you m...

**Physics**

Use the eqn: v1'=v1*(m1-m2)/(m1+m2) M2=neutral car, its v2=0 since its at rest. m1=truck, v1=11.5. Then, once you have v1' you can sub it into m1v1+m2v2=m1v1'+m2v2' and find v2'. The first eqn is a special eqn only to be used when v2=0 and the collision is ...

**physics emergerncyy!**

use the eqn v2'=v1(2*m1/(m1+m2)) This eqn is specially derived fro elastic collisions where v2=0. The speeds should be components; north, south, east, west or up, down, leftm, right etc. Anyways, find the components and then use pythagorean theroem. (once you have v1, you ...

**chemistry_toughhhh**

No it's balanced. you're allowed to have fractions in teh equation. Uncommon yes, but not impossible. Nice try though :P

**chemistry_toughhhh**

Initial rate of rxn of H2O2(aq)->H2O+ 1/2 O2(g) is found at 1.7x10(-3)M/s and is constant for 2min. You start with 160ml of 16M H2O2. How many mL of O2 in one minute? (Measured at 273K and 760mmHg). I tried to find the new conc of H2O2 via NewConc= Old conc - kt Then i mult...

**algebra**

A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. 35 said they drove alone. 38 rode in a carpool. 33 rode public transportation. 5 used both carpools and public transportation. 4 used both a carpool and sometimes t...

**Systems Analysis, Design, and Implementation**

May anyone help me on this 1- what are the Disadvantages of Structure Analysis? 2- what are the Disadvantages of Object-Oriented Analysis? Thanks

**geometry**

Triangle XYZ above is similar to triangle UVW (not shown). If the length of one side of triangle UVW is 60, then what is one possible perimeter of triangle UVW?

**Chem-BufferQ**

Praise the lord. Thank you, i am forever greatful. Kinda pissed that i had the answer alll along and just thought it was in M, not moles. Otherwise i would have known to divide it. But owells, i can't thank you enough man, you're too good :DDDDDDDDDD

**Chem-BufferQ**

You have a solution of .5 L of 1.74g of NH3 and 4.15g of (NH4)2SO4. How many ml of 14M HCl is required for a pH of 9.00? I don't know how to go finish this one. I thought about figuring the concentrations of each (NH3, NH4), making an ice table and solving for the additin...

**chemistry-Buffer Q**

You have a solution of .5 L of 1.74g of NH3 and 4.15g of (NH4)2SO4. How many ml of 14M HCl is required for a pH of 9.00? I don't know how to go finish this one. I thought about figuring the concentrations of each (NH3, NH4), making an ice table and solving for the additino...

**astronomy **

At an average opposition, the Earth and Mars are separated by 0.52 AU. Suppose an astronomer observes Mars at opposition and that seeing blurs the images to a resolution of 1.0 seconds of arc. What is the smallest surface feature the astronomer would be able to resolve on Mars...

**english**

danke schoen

**english**

Are the following sentences fragments, run-on or complete sentences? 1.You better believe what I say to be true. 2.Listen carefully to what the teacher has to say. 3. I have always wanted to live in England, but I am afraid I will only get to visit at this point in time.

**Chemistry**

which contains the lowest % of hydrogen? HCl H3PO4 H2SO4 H20 is it HCL?

**Chemistry**

A sample of C3H8O that contains 200. molecules contains ________ carbon atoms.

**Chemistry**

True or false? 1 mole of ozone has 1.8 x 10^24 atoms? correct if wrong THANK YOU!

**Geometry**

If 3 us an element of A and 3 is not an element of B, then which of the following is NOT true 3 is an element of B complement 3 is an element of A union B 3 is an element of A intersect B

**Chemistry-Common ions**

Wow im an idiot XD thanks. And i dont want to be a nuisance, but how would i do the next question? 0.320M (NH4)2SO4 and 0.492M NH3 (Still looking for OH- conc) Would i find the H+ concentration from the double dissociation of the NH4compound? (i know how to find the oh from th...

**Chemistry-Common ions**

Woooo! the easy way was correct c: Thanks man. But i still kinda don't know why you just doubled it. I thought it would havesomething to do witht he ice table and such since it was in the common ion+buffer chapter :s Care explaining or?

**Chemistry-Common ions**

c=Calculate the OH- conc in a solution containing 6.2x10(-3)M Ba(OH)2 and 1.00x10(-2)M BaCl2? I thought of using the BaCl2 conc to find the conc of Ba initially, then use that in the ice table for Ba(OH)2, and solve for OH. But i dnot think that's right. Help? :/

**Chemistry**

Predict whether the following reactions will be exothermic or endothermic A.] N2 (g) + 3H2 (g) --> 2NH3 (g) B.] S (g) + O2 (g) --> SO2 (g) C.] 2 H2O (g) --> 2 H2 (g) + O2 (g) D.] 2 F (g) --> F2 (g) Bond ________ ∆H˚ (kJ/mol) H-H _________ 432 N(triple)N ...

**Precal**

.Pump Jack Problem: An oil well pump jack is shown in Figure 3-9f. As the motor turns, the walking beam rocks back and forth, pulling the rod out of the well and letting it go back into the well. The connection between the rod and the walking beam is a steel cable that wraps a...

**Chemistry**

Calculate the mass ( in grams) of one mole of methane molecules (to .01 g)

**English**

I think intact is better but i'm not sure. Either one sounds just as rght to me.

**English**

The accident occurred on a/an ______ road A. intact B. enlisted C. isolated D. forging I know what all the words mean I just don't know which one is best. I thing it is wither isolated or intact. Help would be immensely appreciated.

**Probability**

Reformatted so that it's easier to read. I have a Statistics project due tomorrow on Combinatorics. Admittedly, while my math skills aren't too bad (I get 99th percentile on standardized tests and such), it has been a while since I last took a math class after a 2-year...

**Mathematics (Probability, Statistics, etc.)**

I have a Statistics project due tomorrow on Combinatorics. Admittedly, while my math skills aren't too bad (I get 99th percentile on standardized tests and such), it has been a while since I last took a math class after a 2-year lapse in education, so my skills are really ...

**Physics**

a) Density of H2O = 1E^3 = 1000kg/m^3 Pair = 101.3 = 101300 Pa Pwater = (Density of H2O)*Depth*gravity Ptotal = Pair + Pwater b) diameter = 33.1cm r = 1/2 diameter Area = pi*r^2 Force = Ptotal * Area

**Math**

When log s (as ordinate) is plotted against t (as abscissa) on linear paper, the graph is a straight line with slope of -2.1 and intercept of 1.5. Express the relationship between s and t as s = Aekt . If s represents a distance in meters and t a time in seconds, what are the ...

**Math**

Rewrite y = 5(10^(−3x)) in the form y = Ae^(mx). (i.e., determine A and m)

**Math**

Rewrite y = 5(10−3x) in the form y = Ae^(mx). (i.e., determine A and m)

**Math**

A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note that: A linear relat...

**Math**

Find a system of linear equations corresponding to the following augmented matrices: (a) 2 0 |0 3 −4 |0 0 1 |1 (b) 3 0 −2 |5 7 1 4 |−3 0 −2 1 |7 (c) 7 2 1 −3 |5 1 2 4 0 |1 (d) 1 0 0 0 |7 0 1 0 0 |−2 0 0 1 0 |3 0 0 0 1 |4

**Math**

Find the augmented matrix for each of the following systems of linear equations: (a) 3x1 − 2x2 = −1 4x1 + 5x2 = 3 7x1 + 3x2 = 2 (b) 2x1 + 2x3 =1 3x1 − x2 + 4 x3 = 7 6x1 + x2 − x3 = 0 (c) x1 + 2x2 − x4 + x5 =1 3x2 + x3 − x5 = 2 x3 + 7x4 =1 (d...

**Math**

Which of the following are linear equations in x1, x2 and x3? (a) x1 + 5x2 − (2^0.5)x3 =1 (b) x1 + 3x2 + x1.x3 = 2 (c) x1 = −7x2 + 3x3 (d) x1^−2 + x2 + 8x3 =5 (e) x1^3/5 − 2x2 + x3 = 4 (f) πx1 − (2^0.5)x2 + 13x3 = 7^1/3

**Physics**

A small aircraft has a flying speed of 200 km/h in still air. To make a trip from Saskatoon to Regina, a straight line distance on the map of 250 km, a pilot must first determine the wind velocity and then calculate what direction to fly (the 'heading') to compensate f...

**english**

Ingrate Credible

**Science**

You throw a rock horizontally off a cliff with a speed of 10 m/s. after 3.1 seconds, how far were you when threw the rock?

**physics**

im talking about the ones asked at 7:55 and 7:57...please

**math**

bob can u please answer my physics questions

**Math**

32 tiles left over

**algebra 2 word problem**

yes both are right

**aLgEbrA variable & expression**

your welcome

**aLgEbrA variable & expression**

yes those are correct

**Mathematics!**

A cereal factory has weekly fixed costs of $48,000. It costs $1.37 to produce each box of cereal. A box of cereal sells for $3.99. Express the profit function p(x) that gives the total weekly profit from x boxes of cereal.

**physics**

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s

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