Wednesday

December 7, 2016
Total # Posts: 8,159

**Physics**

A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that it's distance from the cave wall is 19 m.

*April 4, 2013*

**English**

Thank you

*April 4, 2013*

**English**

I don't understand the question please explain

*April 4, 2013*

**English**

Pretend you are a modern social worker, educator, environmentalist, or military advisor to the president. Attack an evil you see the work by writing an ironic proposal and the proposal have to be outrageous

*April 4, 2013*

**statistics**

An educational researcher studying the ages of freshmen at community colleges took a sample of 12 students. The data below represent the ages of the students sampled

*April 3, 2013*

**Statstistics**

Chicken Delight claims that 91% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 90 orders revealed that 75 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 91% of the orders are ...

*April 3, 2013*

**government**

Thank you.

*April 2, 2013*

**government**

So it is B I get it.

*April 2, 2013*

**government**

Is it A? Ms. Sue

*April 2, 2013*

**government**

I think C

*April 2, 2013*

**government**

what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a concrete ...

*April 2, 2013*

**math**

Bank A interest per years = (2.46*30000)/100= $738 per year Bank B interest (2.48*30000)/100=744 Bank c interest (2.47*30000)/100=741 So Bank B the most interest at the end of one year.

*April 2, 2013*

**Chemistry**

You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?

*April 2, 2013*

**government**

congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers

*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress

*April 2, 2013*

**government**

which of the following determines who holds the position of speaker of the house?

*April 2, 2013*

**English**

Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the ordinary academic ...

*April 2, 2013*

**Physics**

94860m

*April 2, 2013*

**biology**

) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table by giving the four ...

*April 2, 2013*

**Algebra help!!**

help please!! 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E like symbol that has a 8 at the top. ON the bottom K=3 and on the right side (-1)K/K(k-2)

*April 1, 2013*

**math: Algebra**

Three cylindrical tubes with with a 12 in diameter are strapped together by a plastic band. How long is the band?Suppose that four of the same tubes are strapped together with a snugly fitting plastic band how long is the band?

*April 1, 2013*

**Algebra **

I have two problems that I need some help with. I believe I got to the answer but not quite sure if its right. I need to expand and evaluate each series. 1. There is an E like symbol that has a 7 at the top. On the bottom k=1 and on the right side (-1)^k K 2. There is an E ...

*April 1, 2013*

**Algebra help **

I need some help I posted the first question to this a bit ago but didn't enter it correctly so sorry to those who helped! I also have a 2nd half which I understood till they added the dividing part. I need to find the first five terms of each recursive sequence. 1.C1=64, ...

*April 1, 2013*

**biology**

Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a hemophiliac. Individual 6 is the as yet unborn son of 4 and 5. What is the probability that their son, 6, will be both color blind and a hemophiliac? Express your ...

*March 31, 2013*

**Chemistry**

What are the concentrations of A– and HA after 24 mL of 0.33 M hydrochloric acid solution is added to 86 mL of a solution that has [A– ]=0.67 M? Do NOT consider any equilibrium reactions in this problem. A–(aq) + HCl(aq) → HA(aq) + Cl–(aq) How do I ...

*March 31, 2013*

**Physics**

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached...

*March 31, 2013*

**Biochemistry**

in need of part b like frustration

*March 31, 2013*

**cHEMISTY**

If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate

*March 30, 2013*

**Math Movers**

Thanks!

*March 29, 2013*

**Math Movers**

I meant C=500+10(M-100)

*March 29, 2013*

**Math Movers**

Wouldn't it be this? C=500+10M-100)

*March 29, 2013*

**Math Movers**

Movers A mover charges $500 for the first 100 miles plus $10 for each additional mile. If C represents the charge and M represents miles. What would the equation look like for this question?

*March 29, 2013*

**Science Grade 8**

structure

*March 28, 2013*

**Chemistry**

Titration of 0.6500g of an acid requires 182.42 mL of 6.020x10^-3 N NaOH to reach the endpoint. What is the mass of an equivalent of this acid?

*March 28, 2013*

**Algebra**

What is the product of all roots to the equation \begin{align} & (x-1)(x-2)(x-3) + (x-2)(x-3)(x-4) \\ + & (x-3)(x-4)(x-5) + (x-4)(x-5)(x-6) \\ + & (x-5)(x-6)(x-7) + (x-6)(x-7)(x-8) =0 ? \end{align}

*March 27, 2013*

**Algebra**

\begin{align} & (x-1)(x-2)(x-3) + (x-2)(x-3)(x-4) \\ + & (x-3)(x-4)(x-5) + (x-4)(x-5)(x-6) \\ + & (x-5)(x-6)(x-7) + (x-6)(x-7)(x-8) =0 ? \end{align}

*March 27, 2013*

**Algebra**

As x ranges over all real values, what is the minimum value of f(x)=|x-123|+|x-456| + |x-789| ?

*March 27, 2013*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b.

*March 27, 2013*

**math**

Suppose z is a complex number such that z^5 = -\sqrt{3} + i and z = \sqrt[5]{2} ( \cos n^{\circ} + i \sin n^{\circ}) , where 270 < n < 360 . Find the exact value of n .

*March 27, 2013*

**Maths**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as a/b where a and b are coprime positive integers. Find a + b.

*March 27, 2013*

**math**

EDDIE AND LITTLE MISS ARE WRONG! The real answers are 1. C 2. B 3. D 4. A 5. B 6. D 7. D 100% A! Do not trust Eddie or Little Miss!

*March 27, 2013*

**Microbiology**

You need to make 20ml of a 20% glucose solution. The M.W. of glucose is 180.16. How would you accomplish this: Glucose _______g Pure Water _______ml

*March 27, 2013*

**Microbiology**

You need 3.5L of 50mM NaCl from your 20X stock. How would you accomplish this: 20X stock __________ml Pure Water ___________ml From whatever number I plugged in trying to solve it, I got: 175ml of 20X stock and 3,430ml of Pure Water. Have no idea if those are right. Any help ...

*March 27, 2013*

**Physics**

784 is not the answer

*March 27, 2013*

**Physics**

An 80 kg man is riding in an elevator from the first floor to the 34th floor. The elevator and man are moving at a constant speed. What is the net force on the man in Newtons (g=9.8)

*March 27, 2013*

**calculus**

The volume of the 3-dimensional structure formed by rotating the circle x^2 +(y−5)^2 =1 around the x-axis can be expressed as V=a*pi^2 . What is the value of a

*March 27, 2013*

**calculus**

The volume of the 3-dimensional structure formed by rotating the circle x^2 +(y−5)^2 =1 around the x-axis can be expressed as V=að^2 . What is the value of a

*March 27, 2013*

**maths**

Find the sum of all positive integers b such that b^2 =a^3 +1 , where a is a prime number

*March 27, 2013*

**Algebra**

Consider all 2 digit numbers N such that the last 2 digits of N^2 are N itself. What is the sum of all these 2 digit numbers?

*March 26, 2013*

**Algebra**

Find the smallest positive integer N \neq 23 such that the fraction \frac {N-23} { 7N+6 } is not in simplest terms.

*March 26, 2013*

**Calc.**

A dog kennel owner needs to build a dog run (rectangular area) adjacent to a kennel cage (so that it is in the shape of a rectangle, but only three sides need to be built- one long side is already there). The short side walls of the run are to be cinder block (costs $0.50 per ...

*March 26, 2013*

**Math**

For this problem, all you have to do is find the volume of the chest. The formula for the volume of a rectangle is V=l*w*h. In this case V=4*2*3 which is 24 ft cubed. This means that 24 1x1x1 ft cubes would fit inside the chest.

*March 26, 2013*

**physics**

For this question you're going to need a kinematic equation. Because you're solving for time, I would use d=Voy*t+0.5*a*t^2 The acceleration is 9.8 m/s^2 (making "down" positive) due to gravity. There is no initial velocity (V) in the y direction. You do not ...

*March 26, 2013*

**business**

"...incorporation is no longer the special privilege it once was". Discuss this statement. Does it have any impact on businesses (those not incorporated).

*March 25, 2013*

**business**

what is the utiliterian theory

*March 25, 2013*

**physics**

Light with a frequency of 4.32 × 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 5.8 eV. What is the work function (in eV) of the metal?

*March 25, 2013*

**Math- Calculus**

find the dimensions of a rectangle of maximum size that will fit into a half circle of radius 30 cm.

*March 24, 2013*

**algebra**

Will someone please help me slove this question. Completely factor the polonomial. 8x^3+16x^2+8x+16

*March 24, 2013*

** Math**

A company offers the following charges: $54 per thousand for orders of 62000 or less with the charge per thousand decreased by 38 cents for each thousand above 62000. Find the order which will make the company's revenue a maximum.

*March 24, 2013*

**math**

a driver comes to pick up members of your family (20 members) for a family reunion. the van holds 7 people not including the driver. assuming none of the babies will be riding (2 babies in the group of 20) how many different ways can 7 people be chosen to ride in the van?

*March 24, 2013*

**Math- Calculus**

A company offers the following charges: $54 per thousand for orders of 62000 or less with the charge per thousand decreased by 38 cents for each thousand above 62000. Find the order which will make the company's revenue a maximum.

*March 24, 2013*

**math**

how many different ways can 7 out of 18 people be picked to fit into a van

*March 24, 2013*

**math**

how many different ways can 7 out of 18 people be picked to fit into a van

*March 24, 2013*

**Math- Calculus**

A company needs to produce a cylindrical can to hold water. It must have a volume of 500ml. The side of the can will cost 40$/m^2 to produce and the top and bottom of the can will cost 50$/m^2 to produce. Find the most economical dimensions.

*March 24, 2013*

**Algebra (word problems)**

Studying help! Flights of leaping animals typically have parabolic paths. The figure illustrates a frog jump superimposed on a coordinate plane. The length of the leap is 9 feet, and the maximum height off the ground is 3a feet. Find a standard equation for the path of the ...

*March 22, 2013*

**statistics**

the average proportion of red candies in a pakage is 20% and an 8 oz package contains about 250 candies.What is the probability that a randomly selected 8 oz bag contains less than 45 red candies?

*March 22, 2013*

**English**

Can someone check if this question is grammatically correct? Thank you very much in advance. What do you use the Internet for? What are the main advantages and disadvantages of using it? What are the most addictive things on the Internet? What are the positive and negative ...

*March 21, 2013*

**Early childhood**

Can someone check if this is correct? Of all ages, ages four year olds need the most a) challenge and variety b) love and attention c) structure and discipline d) freedom and spontaneity I think it's a or d but I think a) challenge and variety more????

*March 20, 2013*

**Math**

Simplify the sum 4 5 ______ + ______ M+9 M^2 - 81

*March 20, 2013*

**Math**

3^x=10. Solve for x algebraically.

*March 20, 2013*

**math**

14.88

*March 20, 2013*

**pope**

Which of the following will help you produce clear and focused writing? A. Brainstorming before writing. B. A rubric that provides criteria. C. A solid thesis statement. D. The style of your paper.

*March 19, 2013*

**English**

Can someone check these sentences, please? Thank you. 1) Hi! I’m Mr Radcliffe. Today I would like to tell you about an unpleasant story which happened to me last Friday . 2) It was a beautiful day so I decided to invite our friends, Mr and Mrs Ghandon, to have dinner at ...

*March 19, 2013*

**Maths**

Let 3^a be the highest power of 3 that divides 1000! . What is a ?

*March 19, 2013*

**math**

arrange in descending order: 4/5, 6/20, 8/24 and 5/8.

*March 19, 2013*

**Algebra**

Consider all quadruples of real numbers (x_1,x_2,x_3,x_4), such that x_1\leq x_2 \leq x_3 \leq x_4 and each of the four numbers plus the product of the other three equals 130. If S is the sum of all possible values of x_4, what is S, rounded to the nearest integer?

*March 18, 2013*

**Algebra**

3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

*March 18, 2013*

**English**

Can someone check of this email is grammatically correct? Thank you. How are things? 1) I’ve been on holiday in England and I’ve been attending an English summer course for two weeks. 2) I’ve met an interesting girl from London, Mary, at a party organized by the...

*March 18, 2013*

**Finance**

A firm's target capital structure consists of 40 percent debt, 5 percent preferred stock, and 55 percent common equity. The firm’s cost of debt is 10%, the cost of preferred stock is 11.26%, and the cost of equity is 14 %. What is the firm's weighted average cost ...

*March 18, 2013*

**College Algebra**

a box with an open top is constructed from a rectangular piece of cardboard with dimensions 14 inches by 18 inches by cutting out and discarding equal squares of side x at each corner and then folding up the sides as in the figure. The cost to create such a box is 2.50 per ...

*March 17, 2013*

**Statistics**

0.833 grams per mm

*March 15, 2013*

**UMD**

A new car that is a gas- and electric-powered hybrid has recently hit the market. The distance traveled on one gallon of fuel follows an exponential distributed with a mean of 63 miles. One car is selected at random and is driven on one gallon of gas. What is the probability

*March 15, 2013*

**Plz help math**

n/(n-3)(n-2)

*March 15, 2013*

**Chemistry**

Thank you so much Dr.Bob222. You have my eternal gratitude.

*March 14, 2013*

**Chemistry**

Solid Na2SO4 is added to a solution which is 0.020 M in Pb(NO3)2 and 0.045 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4. What is the concentration of the first ion precipitated when the second ion starts to precipitate?

*March 14, 2013*

**physics**

The effective value of g is inversely proportional to the SQUARE of the distance from the center of the earth. The radius of the Earth is 6378 km. At 5100 km altitude, you are 11,478 km from the center. g will lowered by a factor (6378/11478)^2 Credit to "drwl"

*March 14, 2013*

**physics**

Isn't "g" constantly -9.8 m/s/s, regardless of height?

*March 14, 2013*

**Math**

What do you mean by median? Do you mean average?

*March 14, 2013*

**Algebra**

Distribute the 0.03, 0.17y+0.03y+270=870 0.17y+0.03y = 600 0.20y=600 y= 3000

*March 14, 2013*

**English**

Could you please check the grammar in the following sentences? Thank you very much in advance. 1.I had just turned off the light to go to sleep and I was dozing off when I felt/experienced the greatest fear in my life 2.He had tried to get in touch with Sam when he arrived in ...

*March 14, 2013*

**Algebra**

What is the sum of all the possible values of a for which 25x^2 + (a-15)x + 9 has exactly one distinct real root?

*March 13, 2013*

**Algebra**

How many distinct prime factors does 100100 have?

*March 13, 2013*

**english**

what is girl in this sentence Sarah is a very smart young girl with a bright future. Is it a predicate nominative

*March 13, 2013*

**english**

The lake is finally smooth tonight after everyone rode jet skis and boats. is smooth the predicate adjective

*March 13, 2013*

**english**

what is girl in this sentence Sarah is a very smart young girl with a bright future.

*March 13, 2013*

**english**

what is smooth in this sentence The lake is finally smooth tonight after everyone rode jet skis and boats.

*March 13, 2013*

**english**

Is mommy the indirect object The girls baked mommy some brownies for Mothers day.

*March 13, 2013*