Saturday

February 25, 2017
Total # Posts: 573

**Math**

is it correct?

*May 8, 2014*

**Steve, Anonymous,**

(a) 4/16 * 7/16 = 0.109375 (b) 4/16 * 7/15 = 0.11666666666

*May 8, 2014*

**Steve,**

(a) 4/16 * 7/16 (b) 4/16 * 7/15 I need to find the answer?

*May 8, 2014*

**Math**

***PS: I can't put the diagram so I type it.*** The diagram below shows the contents of a jar from which you select marbles at random. Inside the jar there is 16 marbles. Inside the jar there is 4 red marbles. 7 blue marbles. 5 green marbles. a. What is the probability of ...

*May 8, 2014*

**Math**

Thanks!

*May 8, 2014*

**Math ~ Check Answers ~**

Is this correct? total bands: 185 P(pink) = 95/185 P(brown) = 90/185

*May 8, 2014*

**Math**

A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. a. Find the theoretical probability of selecting a pink rubber band. b. Find the ...

*May 8, 2014*

**Math**

A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. a. Find the theoretical probability of selecting a pink rubber band. b. Find the ...

*May 7, 2014*

**physics**

find the moment of inertia of the earth. Radius is 6,000 km and mass is 6 x 10^24 kg

*May 6, 2014*

**Math**

You have to choose a battery brand to use in your smoke alarm. Company A's batteries have a mean lifespan of 1.2 years, with a standard deviation of 0.1 years. Company B's batteries have a mean lifespan of 1.5 years, with a standard deviation of 0.9 years. Which brand ...

*April 29, 2014*

**Permutations**

1. 4! a.) 3 b.) 6 c.) 12 d.) 24****** 2. 5! a.) 25******** b.) 120 c.) 250 d.) 625 5. Five friends are having their picture taken. How many ways can the photographer arrange the friends in a row? a.) 150 b.) 100 c.) 120******* d.) 80 6. How would you apply the fundamental ...

*April 25, 2014*

**Math ~ Check Answers ~**

A number cube with the numbers 1 through 6 is rolled. Find P (number is greater than or equal to 3). a.) 4/6 b.) 1/6 c.) 2/6********** d.) 5/6

*April 23, 2014*

**state of matter**

why solid is the least amount of energy?

*April 22, 2014*

**Math ~ Check Answers ~**

1. There are 35 marbles in a bag: 9 blue marbles, 8 green marbles, 4 red marbles, 8 white marbles, and 6 yellow marbles. Find P (red). Write the probability as a fraction in simplest form, a decimal, and a percent. a.) 4/31, 0.129, 12.9% b.) 4/35, 0.114, 11.4%*********** c.) ...

*April 21, 2014*

**Chemistry**

I understand now, thanks a lot!

*April 20, 2014*

**Chemistry**

Given the equilibrium reaction N2(g) + 3 H2(g) <---> 2NH3(g) + heat, an increase in temperature will: a) Increase the value of K b) Decrease the value of K c) Increase or decrease the value of K depending upon the concentration of reactants d) Will have no effect on the ...

*April 20, 2014*

**Chemistry**

If the equilibrium constant for a reaction A + B <----> C + D is K, which is true of the equilibrium constant K* for the reaction C + D <----> A + B under the same conditions? A) K* = K B) K* = 1/K C) K* = 1 - K D) K* = 1 - (1/K) E) K* = 1 + K

*April 20, 2014*

**Planets- I Love Space!**

why the outer planets did not lose the lighter gases in their atmospheres.?

*April 14, 2014*

**Chemistry**

Na, Ca, Zn, Al, Mn

*April 10, 2014*

**Pyhsics**

8.3x10^3m

*April 10, 2014*

**Math ~ Check Answers ~ASAP**

3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 ...

*March 20, 2014*

**Science**

1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...

*March 17, 2014*

**Science -Check Answers-**

1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...

*March 17, 2014*

**Math ~ Check Answers ~**

So... is the 1st one is correct? A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. •3.8 ft^3 •60 ft^3 <<<<<< •15 ft^3 •10....

*March 12, 2014*

**Math ~ Check Answers ~**

A rectangular prism has a width of 92 ft and a volume of 240 ft^3. Find the volume of a similar prism with a width of 23 ft. Round to the nearest tenth, if necessary. •3.8 ft^3 •60 ft^3 <<<<<< •15 ft^3 •10.4 ft^3 A pyramid has a height of...

*March 12, 2014*

**Science**

1.b 2.c 3.c 4.d 5.d 6.a 7.b 8.c 9.d 10.c I just took this quiz so all these are correct

*March 5, 2014*

**Math**

The diameter of a circular pizza is 24 in. How much pizza is eaten (in square inches) if half of it is consumed?

*March 3, 2014*

**Algebra 2 Help**

1.) Solve for x. 2x(x - 12) = -40 2.) Solve for x. 3x2 + 2x = 12 - 7x 3.) Simplify the expression. 8sqrt[-63] 4.) Find the absolute value of the complex number. Abs Val [7 + 24i] 5.) Simplify the expression. [4 - 7i] + [2 + 3i] Thank you so much!! :)

*February 28, 2014*

**Algebra 2**

1.) Solve for x. 2x(x - 12) = -40 2.) Solve for x. 3x2 + 2x = 12 - 7x 3.) Simplify the expression. 8sqrt[-63] 4.) Find the absolute value of the complex number. Abs Val [7 + 24i] 5.) Simplify the expression. [4 - 7i] + [2 + 3i] Thank you so much!! :)

*February 28, 2014*

**Math**

4 pictures

*February 28, 2014*

**Math ~ Check Answers ~**

? ? ? ? ? ? ? ? A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 ***** c.) 5 d.) 1 Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect the ...

*February 18, 2014*

**Math ~ Check Answers ~**

A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 c.) 5 d.) 1 ***** Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect the x-axis? a.) 3...

*February 18, 2014*

**Social Studies--Check My Answers Please--**

OK, thanks guys!

*February 14, 2014*

**Social Studies--Check My Answers Please--**

1. During the election of 1824, which candidate won the popular vote and which candidate won the presidency? a.) Andrew Jackson; John Quincy Adams ***** b.) Andrew Jackson; Andrew Jackson c.) John Quincy Adams; John Quincy Adams d.) John Quincy Adams; Henry Clay 2. Some ...

*February 14, 2014*

**Social Studies--Check My Answers Please--**

7. "In 1831 Lowell was little more than a factory village. Several corporations were started, and the cotton-mills belonging to them were building. Help was in great demand; and stories were told all over the country of the new factory town, and the high wages that were ...

*February 13, 2014*

**Social Studies--Check My Answers Please--**

OH Ms. Sue I have 3 more can you also check them too?

*February 13, 2014*

**Social Studies--Check My Answers Please--**

Oh really, Wow! OK, then. Thanks Ms.Sue! for checking!

*February 13, 2014*

**Social Studies--Check My Answers Please--**

Are my answers are correct? Please check them! 1. Which of the following helped to increase the populations of northeastern cities? A) More diversity B) successful cotton crops C) growth of factories and trade***** D) building of the Erie Canal 2. A boundary was set between ...

*February 13, 2014*

**Chemistry**

Yep, I caught it. Thanks for your help!

*February 11, 2014*

**Chemistry**

It makes senses that the molar mass would be smaller than that of CH4 if it diffuses faster. 1/2 = square root of 22/88 = 22 g/mol ?

*February 11, 2014*

**Chemistry**

I used the formula given and came up with 352 g/mol, would that be correct?

*February 11, 2014*

**Chemistry**

A gas diffuses twice as fast as CF4 (g). The molecular mass of the gas is: I'm not sure how to figure this out without the rates of diffusion.

*February 11, 2014*

**Math**

if a 16 ounce can of soup costs 64 cents, what is the cost for each ounce of soup?

*January 29, 2014*

**Earth Science**

partial freezing

*January 16, 2014*

**history**

thanks

*January 7, 2014*

**Math**

Three of these methods give the correct area of the figure. Which method does NOT?

*December 10, 2013*

**physics**

A 5.0 kg \rm kg, 52-cm \rm cm-diameter cylinder rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a)What is the magnitude of the cylinder's initial ...

*December 6, 2013*

**SS again please help me asap**

A Spycrab, you are a life saver! thank you for the 100%

*November 21, 2013*

**Alg 2**

It did help. Thank you so much! cx

*October 25, 2013*

**Alg 2**

The value of y varies directly with x. If y = 64 when x is 16, what is x when y is 288?

*October 25, 2013*

**English**

In the following sentence identify the appositive or appositive phrase and the noun or pronoun defined by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive? Noun or pronoun defined?

*October 1, 2013*

**Chemistry**

How to calculate Q in Nernst Equations, we used 0.10M solutions in all of our half cells. Nernst equation: Ecell = E0cell - RT/nF ln Q Overall reactions: Cu(s) + Pb2+(aq) ~ Cu2+(aq) + Pb(s) and 3Pb(s) + 2Al3+ ~ 3Pb2+ 2Al(s) Thank you!

*May 14, 2013*

**Chemistry**

Using your experimental data, calculate E0cell. Standard voltaic cells contain 1M solutions, but we used 0.10M solutions in all of our half cells. Use the Nernst equation to calculate the standard cell potential (E0cell) from your measured Ecell and Qrxn. Data: Nernst Equation...

*May 14, 2013*

**Math**

An airplane is flying at an altitude of 6 miles and passes directly over a radar antenna. When the plane is 10 miles away, the radar detects that the distance is changing at a rate of 240 mph. what is the speed of the plane? This is an implicit differentiation problem

*May 13, 2013*

**chemistry**

No. this is the sample I did. Cu+(s)+/Cu2+aq)//Al3(aq)+/Al(s) is this right? Anode = Cu+(s)+/Cu2+(aq) - +0.337 Cathode = Al3+(aq)+/Al(s) - -1.66 Overall redox reactions: -0.337 - -1.66 = 1.323?

*May 8, 2013*

**chemistry**

A. Find and list all of the different half- cell combinations. Hint 15 combinations! 1. Copper/ Cu2+ 2. Lead/ Pb2+ 3. Magnesium/ Mg2+ 4. Zinc/ Zn2+ 5. Iron/Fe2+ 6. Aluminum/ Al3+ B. write the half reactions of each combination and the overall redox reaction. Please help! Thank...

*May 8, 2013*

**Chemistry**

What is the Ka of the amino acid serine if it is 34.5% dissociated at pH- 9.46?

*May 4, 2013*

**Chemistry**

ok thank you!

*April 30, 2013*

**Chemistry**

dG=? . how do I start this problem? Do I use dG= -RT*ln*K? dG=-(0.008314 kj/k*mol) (61+ 273.15) ln (29.24)?? I tried this and it is wrong.

*April 30, 2013*

**Chemistry**

DrBob222, I don't know how to solve this problem either. And yes, this is the question for this problem. I even double check it. Please help. Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of ...

*April 30, 2013*

**Chemistry**

Chloroform (CHCL3) has a normal boiling point of 61 'C and an enthalpy of vaporization of 29.24 kJ/mol. What is the value of delta Gvap (in kJ) at 61'C for chloroform?

*April 30, 2013*

**Chemistry**

I realized where I made a mistake for this problem. This time, I got this one right. Thank you so much!

*April 30, 2013*

**Chemistry**

The following thermodynamic data was obtained for an unknown compound. Delta Hvap = 31.3 kj/mol and Delta S Vap= 79.7 kj/mol .Calculate the normal boiling point of this compound in Celcius.. Thank you! Chemistry - DrBob222, Tuesday, April 30, 2013 at 12:31am dG = dHvap - ...

*April 30, 2013*

**Chemistry**

At 20 degree celsius, Ka for an unknown monoprotic weak acid is 0.00088. Calculate the Delta G (in kJ/mol) for the reaction of this unknown acid with water. HA(aq) + H2O(l) <--> H3O+(aq) + A-(aq)

*April 30, 2013*

**chemistry**

Calculate the enthalpy of fusion of naphthalene (C10H8) given that its melting point is 128 Celsius and its entropy of fusion is 47.7 J (k*mol) .

*April 29, 2013*

**chemistry**

Given that for the vaporization of benzene Hvap= 30.7 kj/mol and Svap= 87.0 J(K * mol) , calculate Delta G (in kJ/mol) for the vaporization of benzene at 13 Celcius.

*April 29, 2013*

**Chemistry**

The following thermodynamic data was obtained for an unknown compound. Delta Hvap = 31.3 kj/mol and Delta S Vap= 79.7 kj/mol .Calculate the normal boiling point of this compound in Celcius.. Thank you!

*April 29, 2013*

**Chemistry**

Calculate the molar solubility of MgCO3 in a solution that already contains 1.7×10−3 M sodium carbonate. MgCO3 Ksp = 6.82 x 10-6 IMPORTANT NOTE: You must use the quadratic equation to solve this problem. (DrBob222- thank you so much for all your help!)

*April 26, 2013*

**Chemistry**

how did you get (that's 0.17M x 1/2 = 0.085M)

*April 24, 2013*

**Chemistry**

What is the ph at the equivalence point for a titration of 250 mL of 0.17M piperidine with 0.17 M nitric acid. (piperidine: Kb = 1.3 x 10-3)

*April 23, 2013*

**Chemistry**

Consider the titration of 41.2ml of 0.230 M HF with 0.220 M NaOH . Calculate the ph after the addition of 11.9ml of sodium hydroxide.(HF: Ka = 3.50 x 10-4) Please, I need step by step on on how to solve this type of problem. Thank you very much!

*April 23, 2013*

**Chemistry**

A 17.6ml sample of a monoprotic acid is titrated with 0.212M NaOH. If 69.2ml of base is required to reach the equivalence point, what is the concentration of the acid?

*April 19, 2013*

**social studies**

what wiped out most of the indigenous population of australia

*April 8, 2013*

**Physics**

Sammy Sosa

*March 19, 2013*

**Math**

There are 16 cubic boxes of erasers in a case. What are all the possible dimensions for a case of erasers ? please help need in 30 minutes or less so confused help please thanks

*March 10, 2013*

**math**

2 minutes because 8 divided by 4 = 2

*March 5, 2013*

**Chemistry**

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

*February 26, 2013*

**Chemistry**

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

*February 26, 2013*

**Chemistry**

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

*February 26, 2013*

**Chemistry**

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

*February 26, 2013*

**CSU**

what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

*February 26, 2013*

**Math-grade 4**

thank you ms. sue.my mom said the same thing.

*February 4, 2013*

**Math-grade 4**

I have 12 with a remainder of 3. my teacher wants us to round and estimate. please help! do I round it to 7 divided by 70?

*February 4, 2013*

**Math-grade 4**

what is the estimated quotient of 6 divided into 75?

*February 4, 2013*

**math**

I don't know

*January 28, 2013*

**math**

katie is 4 years younger than sylvia. let k represent katie's age and let s represent slyvia's age.

*January 22, 2013*

**Math**

lilly is correct, not rae.

*January 16, 2013*

**algebra**

It's m-3

*January 9, 2013*

**MATHS**

Is there any reason why f(g)=g^2+3 why do we replace the x with g? Sorry steve im trying my hardest to understand this

*December 19, 2012*

**MATHS**

Thank you steve It says i need to find f(g), i got a different result for some reason help please! And also in the second part, how did you get g^-1 = (x-1)/2 Thank you steve x

*December 19, 2012*

**MATHS**

Critical help please. Level 3 maths algebraic methods is really hard. Q) Two functions f and g are defined by f:x (arrow) x^2 + 3 g:x (arrow) 2x+1 Find a) the function fg b) solve the equation f(x)=12g^-1(x) I need to show my working out, please help someone

*December 19, 2012*

**Algebra 1**

Which one is it? A or D?

*December 18, 2012*

**Maths**

If tom got 200 euro for his birthday. He spent 1.0 how much did he spend?

*December 6, 2012*

**English**

What type of poem is this ? We found his flag one bitter morning And knew our hopes had come to woe. We had come pursuing glory But ended freezing in the snow. 1. The stanza of the poem offers an example of (1 point) slant rhyme. end rhyme. perfect rhyme. * internal rhyme. I ...

*December 5, 2012*

**science**

your a poo

*October 24, 2012*

**Math**

Mrs. Yale wrote a number between 35 and 48 on her board. The sum of the digits is 7. What number did Mrs. Yale write on her board?

*October 23, 2012*

**Chemistry**

3.95x10^-22

*October 16, 2012*

**health**

is it A??

*October 5, 2012*

**English**

Yes, I know what similes and metaphors are. My question is where are their examples of similes and metaphors in the story?

*September 18, 2012*