Tuesday

August 30, 2016
Total # Posts: 98,977

**Math (Calculus)**

Find the positive value of the parameter t corresponding to a point on the curve parametrized by {x= t^2 +3 ; y=t^2+t for which the tangent line passes through the origin. I tried with 2t+3 and 2t+1 but it isn't successful
*May 30, 2016*

**physics**

Remember this d=s.t Where d stands for DISTANCE NOT DISPLACEMENT And s for SPEED NOT VELOCITY Way to remember : think about department of science and technology or Dust.
*May 30, 2016*

**Math Calculus I**

let f(x)= 6sin(x)/(2sin(x)+6cos(x)) The equation of the tangent line to y= f(x) at a= pi/6 can be written in tthe form y=mx+b where m=? b=? I found the f': (9*(cos^2(x)+sin^2(x)))/(3cos(x)+sin(x))^2 but i dont know how to fill it into the form. Can anyone help me? Thanks you
*May 30, 2016*

**Read this Dr.Bob222**

I forgot to include that the above problem is accompanied with a virtual lab that would help determine E. However, I dont know how to predict the value of E based on the virtual lab. PS: I dont know how to post a link on this forum and so in order to visit the virtual lab ...
*May 30, 2016*

**Chemistry- Dr.Bob222**

Using the Nernst equation, determine the diluted concentration for both cells. Show your work. Sn| Sn2+(diluted)||Cu2+|Cu Zn| Zn2+ ||Sn2+(diluted)|Sn
*May 30, 2016*

**Physics**

A garden hose has an inside diameter of 10 mm, and water ﬂows through it at 4.0 m/s. At what rate does water leave the nozzle?. Answer in m3/s
*May 30, 2016*

**Physics**

Water ﬂows through a ﬁre hose of diameter 6.35 cm at a rate of 0.015 m3/s. The ﬁre hose ends in a nozzle of inner diameter 1.750 cm. At what speed does the water exit the nozzle?
*May 30, 2016*

**Math ---HELP!!!!!**

Thanks
*May 30, 2016*

**language arts/ english**

please help
*May 30, 2016*

**language arts/ english**

please help
*May 30, 2016*

**language arts/ english **

Stage directions are one element of a drama. In a paragraph, define and provide an example of stage directions from A Surprising Point of View. Then analyze the stage directions. Explain how these directions contribute to your understanding of A Surprising Point of View. ...
*May 30, 2016*

**Chemistry- Dr.Bob222**

Which metal could you use to reduce Cr3+ ions but not Mn2+ ions? Which metal could you use to reduce ions but not ions? Zn Mg Ni Al
*May 30, 2016*

**physics**

A horizontal pipe (Venturi Tube) 10.0 cm in diameter has a smooth reduction to a pipe 5.00 cm in diameter. If the pressure of the water in the larger pipe is 2.0 x 105 Pa and the pressure in the smaller pipe is 5.0 x 104 Pa, at what rate does water flow through the pipes. Hint...
*May 30, 2016*

**Maths**

Two house A and B are 100m apart and B is due east of A. The bearing of a church c from A is 145 and from B is 225, which house is nearer to the church and by how much
*May 30, 2016*

**Chemistry**

Write short note on sigma bond and pi bond
*May 30, 2016*

**Chemistry**

Write on the physical properties of benzene
*May 30, 2016*

**Chemistry**

Using benzene as an example to illustrate substitution reaction
*May 30, 2016*

**Chemistry**

Define indicators giving four examples and their PH ranges
*May 30, 2016*

**Math**

P, Q, R, are arranged sticks. P is 10km north of Q. The bearing of R from P is 223, and the bearing of Q from R is 097 find the distance of R from P
*May 30, 2016*

**Physics**

So, the answer is 0.0351240737 m/s
*May 30, 2016*

**Physics**

23 should be 21
*May 30, 2016*

**Physics**

The math was right, but 23k should be 2k Pa
*May 30, 2016*

**Physics**

At one end of the Venturi Tube the pressure and speed of flowing water is 21 kPa and 0.05m/s respectively. At another point the pressure is 5 kPa. Find the speed of the water at the second point. Answer in m/s
*May 30, 2016*

**Physics**

vf^2=vi^2 + 2ay (vf^2 - vi^2)/2a=y 8.0 L/s= 0.008 m^3/s ((0.008 m^3/s)^2)/2(9.8)=3.26E-6 m
*May 30, 2016*

**Physics**

Water flows at a rate of 8.0 L/s through an opening at the bottom of a tank that has a diameter of 4.0 cm. How high is the water level of this open- top tank?
*May 30, 2016*

**Physics**

At what speed does water escape from a large open-top tank through an opening 2.00 cm in diameter. The opening is 3.00 m below the water level of the tank on the side of the tank.
*May 30, 2016*

**Math**

12 ounce can of Coke and 8 ounce carton of apple juice. She drank all of the Coke and only 1/2 of the apple juice. There are 30 ml in each ounce of liquid. How many ml did Mrs. Heath drink?
*May 30, 2016*

**algebra**

In his physics class, Mario discovered the height, h, in feet of a bouncing basketball after b bounces is given by teh formula: h = 12(2/3)b - what is the height of the ball after 3 bounces?
*May 30, 2016*

**math**

(25)^-1/3 Ã— 3âˆš16
*May 30, 2016*

**maths**

average third number is 12 if two number are 8 and 15 then the third number is?
*May 30, 2016*

**Chemistry **

A flexible plastic container contains 0.833 g of helium gas in a volume of 18.3 L. If 0.203 g of helium is removed at constant pressure and temperature, what will be the new volume?
*May 29, 2016*

**statistics**

How large a sample is needed to be able to estimate the proportion to within plus or minus 3% and be 95% sure the estimate is correct? frame contains approximately 25,000.do not take non-response into account.
*May 29, 2016*

**Chemistry **

A flexible plastic container contains 0.833 g of helium gas in a volume of 18.3 L. If 0.203 g of helium is removed at constant pressure and temperature, what will be the new volume?
*May 29, 2016*

**Intro to computers**

You are an inexperienced Excel user and don’t know how to create your own formulas. You want to use one of the preconfigured formulas but it doesn’t appear in the Formulas tab ribbon. What can you do?
*May 29, 2016*

**Intro to computers**

What does the COUNT function do in Excel?
*May 29, 2016*

**Intro to computers**

You have created a worksheet documenting sales over every quarter since the start of your company. Each column represents a quarter and each row represents a product you sell. Each cell contains the sales generated for that product. You want to find the highest sales figure ...
*May 29, 2016*

**Intro to computers**

You create a formula that adds cells E4 through E19. Three of these cells are blank. What happens?
*May 29, 2016*

**Intro to computers**

How do you change between worksheets inside an Excel Workbook?
*May 29, 2016*

**Physics**

A partially filled bucket of water sits on a scale and its weight is 4.8 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.8 N. Find the volume of the metal.
*May 29, 2016*

**Science **

A man has a weight of 120kg what will be the Weight of same man on the moon
*May 29, 2016*

**Math**

do it yourself
*May 29, 2016*

**PHYSICS**

I don't know
*May 29, 2016*

**Integral calculus**

find the area of the surface generated by revolving about x-axis the upper half of the ellipse 4x^2 + 16y^2 = 64
*May 29, 2016*

**chemistry**

1737 g
*May 29, 2016*

**chemistry**

1737 g
*May 29, 2016*

**Chemistry- Dr.Bob222**

Using the Nernst equation, determine the diluted concentration for both cells. Show your work. Given that [Cu2+] and [Zn2+] are both 2M. Note: I know that the nernst equation is E= E*cell=(-0.0592 V/n)log Q where Q in this case are [Sn2+]/[Cu2+] and [Zn2+]/[Sn2+]. I think that...
*May 28, 2016*

**Chemistry**

2.8 4.1
*May 28, 2016*

**Chemistry- Dr.Bob222**

Using the Nernst equation, determine the diluted concentration for both cells. Show your work. Given that [Cu2+] and [Zn2+] are both 2M. Note: I know that the nernst equation is E= E*cell=(-0.0592 V/n)log Q where Q in this case are [Sn2+]/[Cu2+] and [Zn2+]/[Sn2+]. I think that...
*May 28, 2016*

**Algebra**

2x^3y^3-x^2y^3+2x-y factor by grouping
*May 28, 2016*

**foot hill**

1 (6 + x) - 5 = 12 3 x =
*May 28, 2016*

**Physics**

A hydraulic press has an input cylinder 4.0cm in diameter and an output cylinder 16cm in diameter. (a) Assuming 100 percent efﬁciency, ﬁnd the force exerted by the output piston when a force of 170N is applied to the input piston.
*May 28, 2016*

**Physics**

A partially filled bucket of water sits on a scale and its weight is 3.5 N. A piece of metal is suspended from a thread and completely immersed in the bucket (but does not touch the bottom). The scale now reads 7.5 N. Find the volume of the metal.
*May 28, 2016*

**Physics**

What is the Buoyancy force exerted on a 180kg iron anchor when it is immersed in seawater? The density of iron is 7.8×103 kg/m3 and that of seawater is 1.03 × 103 kg/m3 .
*May 28, 2016*

**Physics**

What is the Buoyancy force exerted on a 180kg iron anchor when it is immersed in seawater? The density of iron is 7.8×103 kg/m3 and that of seawater is 1.03 × 103 kg/m3 .
*May 28, 2016*

**Physics**

A raft is constructed of wood having a density of 6.00x102 kg/m3. Its surface area is 5.40 m2 and its volume is 0.45 m3. When the raft is placed in fresh water, to what depth h is the raft submerged by its weight? The density of fresh water is 1000 kg/m3. Hint: Use Newton’...
*May 28, 2016*

**algebra**

What is the degree of monomial 7a4b?
*May 28, 2016*

**Physics**

The mass of a liter of milk is 1.032 kg. The butterfat that it contains has a density of 865 kg/m3 when pure, and it constitutes exactly 4.0 percent of the milk by volume. What is the density of the fat-free skimmed milk
*May 28, 2016*

**Physics**

A thin sheet of gold foil has an area of 2.98 cm2 and a mass of 6.20 mg. How thick is the sheet? The density of gold is 19, 300 kg/m3.
*May 28, 2016*

**Math**

And then my answer for 25 is 210 by 42=5 1%=5 people 100% x 5 people=500
*May 27, 2016*

**Math**

Then for 22 I got: 65 X 0.6 X 1.05=$40.95
*May 27, 2016*

**Math**

I think I got 21. 10/$6.75 = $1.48 12/$.25= $1.65 so option 1 is cheaper.
*May 27, 2016*

**Math**

Hi can you please help me with these math questions? I really need to know the answers. 21. Find the unit price for each option shown below. Round to the nearest cent when necessary. Indicate which option is the better buy. Option I: 10 candy bars for $6.75 Option II: 12 candy...
*May 27, 2016*

**Mircro-Economics**

a-1=2x-xy
*May 27, 2016*

**Mircro-Economics**

ggh
*May 27, 2016*

**Mircro-Economics**

please give me the right answer
*May 27, 2016*

**Mircro-Economics**

mu=p
*May 27, 2016*

**Chemistry**

Choose an alkane that is 6 to 10 carbon atoms in length. List the alkane's name and the other isomers you can properly draw and name. For example: Decane / isomer 2 methyl-Nonane. Do not guess. Draw out on paper then name for best results. Include the drawing of the alkane...
*May 27, 2016*

**English**

i need help with this one
*May 27, 2016*

**math**

Is the term 33
*May 26, 2016*

**math**

how do we sub it in and evaluate
*May 26, 2016*

**math**

If the first term in an arithmetic sequence is 15 and the tenth term is 69. What is the fourth term in the sequence?
*May 26, 2016*

**math**

It's 7.5 not 8 ft?
*May 26, 2016*

**math**

A painter places an 8.5 ft ladder against a wall. The bottom of the ladder is 4 ft from the base of the wall. How high up the wall does the ladder reach? (hint: round to the nearest tenth)
*May 26, 2016*

**math**

27
*May 26, 2016*

**math**

The sales of a kids sneakers rose from $3 billion to $3.8 billion. Find the percent of increase to the nearest whole percent?
*May 26, 2016*

**Life orientation **

Clearly discribe a recent corruption and fraud case in the country making headlines in the media :who are the role players who got involved ,the extent to which it linked to ither crimes ,role played by the media and that of the state of deal with this crime. How fraud and ...
*May 26, 2016*

**Biology**

Scanning electron microscope and transmission electron microscope @ PsyDAG
*May 26, 2016*

**Biology**

@Ms.Sue can you plz help
*May 26, 2016*

**Biology**

In the microscope activity, you viewed some of the same specimens under multiple microscopes. Describe the differences in what you could see under each microscope. Which microscope would view small specimens the best and why?
*May 26, 2016*

**Math**

The answer is 28.26
*May 26, 2016*

**Math**

The capcity of an elevator is either 15 children or 11 adults.If 12 children are currently in the elevator, how many adults can still get in?
*May 26, 2016*

**Drivers ED check my answers**

2. A left front tire blows out. Unless you control the vehicle, what will probably happen? (1 point) You will slide in a straight line. Your vehicle will pull toward the shoulder. Your vehicle will pull to the left.***** Your vehicle will sway from left to right. 3. When ...
*May 26, 2016*

**maths**

in a building there are 9 floor above the ground level and 4 floors below the ground level if the ground level is represented by 0,what integer would best describe the floor 4 above the ground level?
*May 26, 2016*

**history**

Which sentences use a time-related term correctly? Choose all answers that are correct. A. Confucius was teaching in China in B.C. 500. B. The Roman Empire fell to Germanic Tribes in A.D. 476. C. Homer composed the Iliad and Odyssey in about B.C.E. 750. D. The Black Death ...
*May 26, 2016*

**Math**

tan(@) =opp/adj so tan53=6.4/adj adj=6.4/tan53=6.4/1.3333=4.8
*May 26, 2016*

**maths**

there are 6! total arrangement so it = 720 if the plate code is AS1234 and we have A (1234) S or S (1234) A for the numbers possible arrangement is 4!= 24 P(E)= 24/720=1/30 we have two ways P(E) will be 1/15.
*May 26, 2016*

**maths**

if a plate of car consists of two letters and four digits and one car chosen at random probabiliy the letters at the beginning and at the end
*May 26, 2016*

**Saint Hilary**

Jesse wants to use a recipe which calls for 1 1/2 tsp cinnamon to make as many cupcakes as he can. Jesse has only 1 tsp of cinnamon, so he cannot make a whole batch. What fraction of the batch can Jesse make if he uses all his cinnamon
*May 26, 2016*

**Physics**

Waves are coming towards your boat at a speed of 4 m/s, you are standing on the fish scale and notice that the reading on the scale changes up and down such that the lowest scale reading is ½ of the maximum scale reading. If the total vertical distance travelled by the ...
*May 25, 2016*

**Physics**

Waves are coming towards your boat at a speed of 4 m/s, you are standing on the fish scale and notice that the reading on the scale changes up and down such that the lowest scale reading is ½ of the maximum scale reading. If the total vertical distance travelled by the ...
*May 25, 2016*

**Math**

For pres and vp John and Joe is different from Joe and John This is why it is a permutation. on a commitee Joe and John are the same choice as John and Joe which requires a combination.
*May 25, 2016*

**Chemistry**

Does it have to do with the signs. Are they negative when you create the compound and positive when you break it apart? Something for you to think about.
*May 25, 2016*

**Quick physics help**

what does a mirror do to images that it reflects
*May 25, 2016*

**math**

thank you Ms. Sue u always are ready to help other people
*May 25, 2016*

**math**

The wheel in the figure has a diameter of 1 yard. The wheel is rolled forward as shown until the point marked A has undergone exactly one revolution around the wheel's axis. What number is represented by the distance in yards that the wheel has traveled along the ground? ...
*May 25, 2016*

**math**

In a box filled with 60 colored chips, 1/6 are blue, 1/2 are white, 1/4 are yellow, and 1/2 are purple. Find the probability of picking at random a purple chip or a white chip?
*May 25, 2016*

**MATH**

Find the largest possible rectangular area you can enclose assuming you have 128 meters of fencing.
*May 25, 2016*

**math**

882
*May 25, 2016*