Thursday

October 20, 2016
Total # Posts: 341

**Maths**

Harry is x years old now. 3 years ago Jenny was twice Harry's age. In three years timthe Ahmed will be 5 times as old as Jenny. Write an expression for Ahmed's ago now.

*October 4, 2016*

**Math**

How much pure antifreeze must be added to 18 liters of a 20% solution to make a 40% solution ?

*July 17, 2016*

**Physics CENTER OF MASS**

A thin rectangular plate of uniform areal density σ = 2.79 kg/m2 has length of 37.0 cm and width of 23.0 cm. The lower left hand corner is located at the origin, (x,y)= (0,0) and the length is along the x-axis. (a)There is a circular hole of radius 8.00 cm with center at...

*April 10, 2016*

**AP Chemistry **

A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 × 10-4) with 0.10 M NaOH a. Does the solution contain a strong acid with a strong base, a strong acid with a weak base, a weak acid with a strong base, or a weak acid with a weak base? b. ...

*March 23, 2016*

**math !**

no its not

*March 23, 2016*

**physics**

Your CECS graduation tassel hangs from the rear view mirror of your graduation gift, a 1981 DeLorean DMC-12 with Mr. Fusion garbage fusion generator!!! Your tassel hangs plumb or vertical when driving at a constant speed on a level highway. When accelerating you observe the ...

*March 1, 2016*

**Algebra**

50x+10(x)+140+20(2x+4)=1720 50x+10x+140+40x+80=1720 100x+220=1720 100x=1720-220 x=1500/100 x=15 15 fifties 29 tens 34 twenties

*February 27, 2016*

**Chemistry**

Hi DrBob, the rates are NOT given which is why I am having such an issue trying to work with rate and K both as unknowns.

*February 18, 2016*

**Chemistry **

An atmospheric scientist interested in how NO is converted into NO2 in urban atmospheres carries out two experiments to measure the rate of this reaction. The data are tabulated below. A: [NO]0 = 9.63 × 10-1 M, [O2]0 = 4.1 × 10-4 M t(s) 0/3.0/6.0/9.0/12.0 [O2] 4.1/...

*February 18, 2016*

**Physics**

A child bounces in a harness suspended from a door frame by three elastic bands. (a) If each elastic band stretches 0.210 m while supporting a 7.35-kg child, what is the force constant for each elastic band? 114.33 N/m (b) What is the time for one complete bounce of this child...

*February 8, 2016*

**Business Law**

Celia and Mary are going to open a boutique. the opening of the boutique is delayed because the purses have not delivered after 60 days. They had a contract with the supplier specifying that the purses must be delivered within 30days. Can Celia and Mary cancel the contract?

*January 29, 2016*

**Connexus Help**

i go to connexus but i am in 6th grade and i need help with my assemnet

*January 18, 2016*

**Physics- just verfiying an equation**

update: for the u, I don't what happen to it but its supposed to be an omega sign--I guess the formatting got a little messed up

*January 9, 2016*

**Physics- just verfiying an equation**

hello, so i'm doing a physics project where I have found the following equation for centripetal force: Fcent=mrù^2 Where f= centripetal force m=mass r=radius ù=angular velocity my question is to make centripetal force greater, does that mean mass, radius and ...

*January 9, 2016*

**Math**

Monthly payments on a house valued at $84000 with 4.9% compound interest over 30 years

*January 8, 2016*

**Physics**

A man on a motorcycle plans to make a jump as shown in the figure. If he leaves the ramp with a speed of 29.5 m/s and has a speed of 28.0 m/s at the top of his trajectory, determine his maximum height (h) above the end of the ramp. Ignore friction and air resistance.

*January 7, 2016*

**math**

One 15 pound bag of lawn fertilizer covers 350 square feet. Garden Depot sells full bags of fertilizer for $7.89. What will the cost of enough fertilizer to cover a 42 foot by 80 foot lawn?

*November 23, 2015*

**physics **

An airplane travels 3900 km at 810 km/h, and then encounters a tailwind that boosts its speed to 950 km/h for the next 3000 km. What was the average speed of the plane for this trip? 3900+3000 6900 6900/8 862.5

*November 8, 2015*

**Math**

Find the surface area of the a square pyramid.The A = 3 m and H = 4.5 m?

*March 30, 2015*

**geography**

well that wasn't nice

*March 24, 2015*

**statistics**

A casting director wishes to find one male and one female to cast is his play. If he plans to audition 5 males and 7 females, in how many different ways can this be done? DO NOT put a comma in your response.

*March 11, 2015*

**Math**

I can't unscramble this. GONUENRIC It deals with Geometry.

*March 4, 2015*

**LA - 1 question**

Thank you so much Santana!

*January 9, 2015*

**physics**

1. A billiard ball of mass mA = 0.4 kg moving with a speed vA = 2 m/s strikes a second ball, initially at rest, of mass mB = 0.4 kg. As a result of the collision, the first ball is deflected off at an angle of 30.0o with a speed v’A = 1.2 m/s. Taking the xaxis to be ...

*January 7, 2015*

**LANGUAGE ARTS !! 8TH GRADE**

Thx anonymous! ANONYMOUS IS RIGHT

*January 6, 2015*

**physics**

An Olympic diver falls from rest from the platform 10m high. At what velocity does the diver hit the water is acceleration in 9.8m/s^2. Do I assume "rest" means a initial velocity of 0? Could the formula be: d= (vf^2-vi^2)/2(a) ? as in d=10, a=9.8 vi=0 vf = √(d...

*November 18, 2014*

**algebra 2**

Mine didn't come out right though?...

*November 16, 2014*

**algebra 2**

h(t)=-4.9t^2+30.5t+8.5

*November 16, 2014*

**algebra**

A rental company purchases a truck for $14,500. The truck requires an average cost of $6.75 per day in maintenance. (a) Find a linear function that expresses the total cost C of owning the truck after t days. C(t) = 1 (b) The truck rents for $55.00 a day. Find a linear ...

*October 25, 2014*

**algebra**

The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature, °F af 40 760 60 ...

*October 25, 2014*

**algebra**

A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table. Time, min Temperature, °F 15 ...

*October 25, 2014*

**college algebra**

There were 39,000 desktop publishing jobs in the United States in 2000. It has been projected that there will be 64,000 desktop publishing jobs in 2010. (a) Using the BLS data, find the number of desktop publishing jobs as a linear function of the year. N(t)= _____? (b) Using ...

*October 25, 2014*

**work force leadership**

A supervisor needs to produce metal nameplates for bicycles. Two machines are available. The first requires a single die that costs $600. The plates will take 3 minutes each to produce at a total cost of $60 an hour. The second machine requires no initial expense but takes 6 ...

*October 10, 2014*

**How long will it take the investment to double?**

14.4

*October 10, 2014*

**Chemistry**

Im studying for the MCAT and i found this question in my old chem book. i can't figure out how to derive the formula they are talking about... Nitrogen monoxide reacts with oxygen to give nitrogen dioxide. 2 NO(g)+ O2(g) --> 2 NO2(g) The rate law is -[NO]/&#...

*August 4, 2014*

**Chemistry**

Im studying for the MCAT and i found this question in my old chem book. i can't figure out how to derive the formula they are talking about... Nitrogen monoxide reacts with oxygen to give nitrogen dioxide. 2 NO(g)+ O2(g) --> 2 NO2(g) The rate law is -[NO]/&#...

*August 4, 2014*

**Chem**

Book doesn't have an answer for this one. Im just lost as to how to apply the ideal gas law to the rate law and constant. P=MRT => 155atm=(2mol)(0.0821)(298k)?

*August 4, 2014*

**Chem**

where does the rate law and rate constant come into play?

*August 4, 2014*

**Chem**

Im studying for the MCAT and i found this question in my old chem book. i can't figure out how to derive the formula they are talking about... Nitrogen monoxide reacts with oxygen to give nitrogen dioxide. 2 NO(g)+ O2(g) --> 2 NO2(g) The rate law is -[NO]/&#...

*August 4, 2014*

**Chem**

Im studying for the MCAT and i found this question in my old chem book. i can't figure out how to derive the formula they are talking about... Nitrogen monoxide reacts with oxygen to give nitrogen dioxide. 2 NO(g)+ O2(g) --> 2 NO2(g) The rate law is -[NO]/&#...

*August 4, 2014*

**chemisrty**

A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of ...

*June 18, 2014*

**Algebra**

The ratio of the lengths of strings that play the guitar notes D and B is 27 to 16. If a string 64 cm long plays a B, what is the length of the string that plays a D?

*June 11, 2014*

**Introductory Algebra**

My teacher is 67 years old.

*June 11, 2014*

**calculus**

An electron, travelling at 2000 m/s, is suddenly influenced by an extreme deceleration of 3000 m/s2. How fast is it going 0.03 s later?

*June 11, 2014*

**algebra**

m+3(m-4)=16 2z-4(9-3z)=62 2b+8/5=-12

*March 5, 2014*

**math**

-n+8n=35 4x-7-7x=-1 -22+3k+6=-28 -2(m+7)=-22 m+3(m-4)=16 2z-4(9-3z)=62 2b+8/5=-12 g+4/7=6 9-3h/5=-6 4m-16/12=-3

*March 5, 2014*

**science HELP ASAP!!!!!!!**

Please I need those answers tooo!!!

*March 3, 2014*

**math**

-3h=9(2-3h) 5(t+7)=2(s+9) 6(s+4)=3(s+9) 2(p+2)=1.8-2-0.2(p+5)

*February 27, 2014*

**math**

30-2s=4s 13q-48=-3q 5z-43=2z+80 8f+11=-7f-19 9b-10=-b-18

*February 27, 2014*

**math**

-(6-c)+3(2c-7)=1

*February 20, 2014*

**math**

solve the equation -n+8n=35

*February 20, 2014*

**math**

doug earned $40 from weekend job. he spent 1/4 of it on cd and 1/5 on movie ticket. how much money does he have left?

*February 5, 2014*

**trig**

A computerized spin balance machine rotates a 35-inch-diameter tire at 400 revolutions per minute. (a) Find the road speed (in miles per hour) at which the tire is being balanced. (Round your answer to two decimal places.) (b) At what rate should the spin balance machine be ...

*January 23, 2014*

**math**

what is the lcd of 1/2 and 2/3

*January 20, 2014*

**math**

what is the least common multiple of 8,10

*January 20, 2014*

**soicalstudies**

and really who gives them wikipidia any way

*October 31, 2013*

**soicalstudies**

A the answer is A sheesh just say it and get it over with and ms. sue before you say anything i know what i did so give me any of the crap your giving avery body else

*October 31, 2013*

**Psychology**

The voltage at a receptor site has just changed from -70 millivolts to -75 millivolts as a result of an _______ and will ________. a). inhibitory postsynaptic potential;increase the likelihood of an action potential. b). excitatory postsynaptic potential;decrease the ...

*October 3, 2013*

**Statistics**

No typo, that is how the question reads. Can you check my answers? 1. 0.54 2. 0.52 3. 0.140608 4. 0.405224 5. 0.4746

*September 30, 2013*

**Statistics**

Ricardo's car rental offers five different types of vehicles, compact cars (CC), midsize cars (MC), sport utility vehicles (SUV), vans (V), and luxury cars (L). Historically, if a random individual comes to rent a vehicle, the following probabilities apply: P(CC) = 0.16 P(...

*September 30, 2013*

**math**

a cookie recipe calls for 2 1/4 cups of flour.the yield of the recipe is two dozen cookies.how much flour goes into each cookie?

*September 23, 2013*

**math**

What is the scenario for the question the capacity of a beaker is 150 m.l.. how many beakers can be filled from a 4 L container?

*August 27, 2013*

**beginning algebra**

the rays won 33 fewer games than twice as many games as they lost. the total games played was 162. how many wins and how many losses did they have?

*June 8, 2013*

**english**

Im doing a 8 paragraph project report on cherokee indians, i need a introduction, final draft, six body paragraphs and a conclusion for a total 8 paragraphs please help me it due the 12

*May 31, 2013*

**Math**

Binary: 1cm,2cm,4cm,8cm,16cm 1. 1 2. 2 3. 1+2 4. 4 5. 5+1 6. 4+2 7. 4+3+1 8. 8 9. 8+1 10. 8+2 11. 8+2+1 12. 8+4 anyways you get it

*May 28, 2013*

**Chemistry**

....question. what is the concentration of the sulfuric acid? Are we to assume that this is pure sulfuric acid, no water?

*May 28, 2013*

**math**

customers in 14 years = 51,200 (1-0.038)^14 Did they give you a formula for this?

*May 28, 2013*

**math**

same thing as the other one i answered the general case is: new value = (old value)X(1+/-percent change)^years remember that 1% = 0.01 in the above formuala, and that it's negative if it's "decreasing/depreciating" and positive if it's growing.

*May 28, 2013*

**english **

Book: Information you’ll need to cite a book Example- Powell, Kevin, ed. Step into a World: A Global Anthology of the New Black Literature. 2nd ed. New York: Wiley, 2000. 1. Author(s) or Editor(s)- last name, first name, middle is any, followed by a period 2. Title of ...

*April 21, 2013*

**chemistry**

9 times the MW of C plus 8 times the MW of H plus 4 times the MW of O. Add it all up

*April 9, 2013*

**Clinical Chemistry**

Thank you... Any ideas on ISE vs. flame photometry? I was thinking that maybe flame photometry comes out consistently slightly lower because it is hard to standardize? I mean, its hard to get the exact temperature of the flame to be precise (and accurate)?

*April 9, 2013*

**Clinical Chemistry**

I have 2 questions relating to clinical chemistry... 1st: I have no idea where to even start with this. It seems like it should be simple, but I have no clue. The question is... "In serum, about 55% of total serum calcium is bound. The measurement of ionized (free) ...

*April 9, 2013*

**Clinical Chemistry**

My guess is that since 55% is bound, that means 45% is free. So... make a ratio and solve for x .45/1.10mM = .55/x Whatever x equals, add it to 1.10mM since we are looking for the total calcium in serum. What do you think?

*April 9, 2013*

**Clinical Chemistry**

BLD 414?

*April 9, 2013*

**Algebra**

I'm having trouble finishing evaluating the expression b+1/6=-1/3

*February 20, 2013*

**Math**

two cards are drawn from a deck of cards. Once a card is drawn, it is not replaced. Find the probability of drawing a queen followed by a king.

*January 27, 2013*

**Social Studies**

What us a Political Cliff? I am supposed to write a summary about the subject.

*January 3, 2013*

**Help **

Any tips on how to get excellent grades? :) please reply fast

*November 25, 2012*

**pre algebra**

748.84

*November 16, 2012*

**burnhan **

Explain how you would use a number line to round 148 to the nearest ten

*October 17, 2012*

**math**

Y=4x-3

*September 13, 2012*

**chemistry**

how many electrons flow through a wire in 83.9 seconds if the current was 0.32 amps? ( an ampere is a coulomb/sec)and the charge on an electron is 1.602×

*September 8, 2012*

**chemistry**

A nitrogen atom has 7 protons, and its most common isotope has 7 neutrons. A radioactive isotope of nitrogen has 9 neutrons. What is the atomic number and what is the mass number of this radioactive nitrogen? Show all of your work for full credit

*August 26, 2012*

**Social Studies**

Does anyone have any information about Sulawesi artifacts? I am having trouble finding facts about an ancient ceremonial mahogany grass bowl. Thanks.

*June 12, 2012*

**statistics**

a sales manager wants to know whether a special promotional campaign is a success. he had the following data-Retail outlets :1 2 3 4 5 6 ; Sales before campaign : 50 48 31 42 28 53 ; Sales after campaign : 56 55 30 45 29 58. Test at 5% LOS.

*May 14, 2012*

**Statistics**

Having problems reading the z-table. I don't understand how .1500% equates to a 1.04 z-score Thank you for your help

*May 13, 2012*

**Chemistry **

What physical properties will the ionic compound CaSO4 be expected to have?

*April 27, 2012*

**Chemistry **

Which group of elements is most likely to not form ions?

*April 26, 2012*

**social studies 7th**

Who introduced them into Italy by Etruscan nobile

*April 3, 2012*

**platonic solids**

what is formula for deciding size of pentagons to make a 9" tall (12", 16" tall, etc.) dodocahedron?

*March 29, 2012*

**chemistry**

A gas is compressed from an initial volume of 5.60 L to a final volume of 1.22 L by an external pressure of 1.00 atm. During the compression the gas releases 128 J of heat. What is the change in internal energy of the gas?

*March 20, 2012*

**chemistry**

a 256 mL sample of an unknown gas was collected over water at 23 degrre celsius and 750 mmHg. the gas has a mass of 0.80 grams. what is the molar mass of the gas? (the vapor pressure of water at 23 degree celsius is 21.0 mmHg)

*March 19, 2012*

**math**

. Which is the next term in the number pattern: 77, 64, 53, 44, 37

*March 1, 2012*

**history**

Well, this is an idea of a thesis statement.. The presence of the urban classes prevents revolutions from becoming homogeneous movements. This is because each class (or individual) fight for their own material interests.

*February 18, 2012*

**history**

I need an opinion regarding this thesis statement. Urban areas had always served as the logical epicentre for organized opposition against the establishment. However, due to the presence of urban classes trying to fight for their own material interests, rebellions and ...

*February 18, 2012*

**math**

Given 9 yards of fabric how many whole costumes could be made if each costume uses 1 3/7 yards of fabric

*February 14, 2012*

**Math**

Adult tickets=x Child tickets=88-x 8x + 5(88-x)=614 8x + 440-5x=614 3x=614-440 3x=174 x=58 Adult=58 child=30

*February 4, 2012*

**Chemistry**

What type of bond is formed when two or more non metals bond with each other? and What type of bond is formed when a metal and non metal bond with each other?

*January 23, 2012*