# Posts by mandy

Total # Posts: 571

**Chemistry**

Of the compounds below,_____ has the smallest ionic separation and why? A.RbF B.K2S C.SrBr2 D.KF E.RbCl --> How does one determine if a compound has a high or low ionic separation, and what is ionic separation?

*March 20, 2017*

**Chemistry**

Of the compounds below,_____ has the smallest ionic separation and why? A.RbF B.K2S C.SrBr2 D.KF E.RbCl --> How does one determine if a compound has a high or low ionic separation, and what is ionic separation?

*March 20, 2017*

**math**

Nine friends share 12 pounds pecans equally. how many pounds does each friend gets equally?

*November 9, 2016*

**math**

what are 3 ratios for 1/10?

*October 18, 2016*

**Math**

Every 2nd customer will receive both $ gift cards

*September 26, 2016*

**Physics**

The highest wall that a projectile can clear is 17m, when the projectile is launched at an angle of 35.0 degrees above the horizontal. What is the projectile's launch speed?

*September 14, 2016*

**English**

Quote Two similes from the poem, explain what they mean? Please help

*August 29, 2016*

**Math**

The answer choices are (A) 68 (B) 76 (C) 80 (D) 95 (E) 100 Is it e?

*August 9, 2016*

**Math**

How many whole numbers between 100 and 500 have 9 as one or more of its digits?

*August 9, 2016*

**Math(Assignment Due**

Please help me, I have know idea how to do this and the assignment is due today! A manufacturer is producing metal rods, whose lengths are normally distributed with a mean of 75.0cm and a standard deviation of 0.25cm. If 3000 metal rods are produced how many will be between 74...

*June 29, 2016*

**Math: Multistep area problems**

Thanks for helping me!

*June 2, 2016*

**Math: Multistep area problems**

32

*June 2, 2016*

**Math: Multistep area problems**

48

*June 2, 2016*

**Math: Multistep area problems**

16

*June 2, 2016*

**Math: Multistep area problems**

64

*June 2, 2016*

**Math: Multistep area problems**

Mark is covering an 8-inch-square board with 1-inch-square tiles. He uses gray tiles to make four 2-in. by 2-in. squares. He covers the rest of the board with white tiles. How many more white tiles than gray tiles will Mark use?

*June 2, 2016*

**Math Trignometry**

. From the top of the 800-foot-tall Cartalk Tower, Tom sees a plane; the angle of elevation is 67°. At the same instant, Ray, who is on the ground 1 mile from the building, notes that his angle of elevation to the plane is 81° and that his angle of elevation to the top...

*May 19, 2016*

**Math**

3/5q-(1/5+2q)

*May 7, 2016*

**Geography**

Which is the result of zero population growth? population stability no natural increase*** a rapid decline in human population the elimination of high density populations

*May 6, 2016*

**Geography**

It doesn't really define it

*May 6, 2016*

**Geography**

Which of the following characterizes a stage 3 population? produces many offspring lives in rural areas experiences a sharp increase in crude death rates consists of primordially urban dwellers***

*May 6, 2016*

**Chemisrty**

if electricity of sufficient voltage is passed into a solution of potassium iodide in water, a reaction takes place in which elemental hydrogen gas and elemental iodine are produced, leaving a solution of potassium hydroxide. what is the unbalanced equation?

*March 20, 2016*

**Precal/Math**

How do i get the left side to equal the right hand side? (Cosx)/(1+sinx) + (cosx)/1-sinx = 2secx

*March 18, 2016*

**Math/Finance**

Randy had $2000 he wants to double in 2 years. What is the approximate rate he will need??

*February 18, 2016*

**Science**

Ionic bonds: a. result from the sharing of electrons between atoms. b. form only between polar molecules. c. form between atoms that develop opposite charges. d. result from the natural repulsion that develops between protons. answer is C

*January 30, 2016*

**Science**

As a result of rigorous experimentation Question 7 options: more hypotheses may be developed. more questions may be asked. a new biological concept could emerge. entire theories may be modified or discarded. all of these i suppose

*January 30, 2016*

**Algebra**

The temperature at 7 AM in Chicago was 12 degrees. If the temperature increased 3 degrees every hour. What would the temperature be in Chicago at noon?

*January 4, 2016*

**science**

Thanks!

*November 29, 2015*

**science**

Circle all of the following that go through active transport. a)osmosis b)endocytosis c)diffusion d)exocytosis Please help me, I'll greatly appreciate it! :)

*November 29, 2015*

**Graphing Reciprocal Trig Functions**

a) y=csc(x-3) I understand that there are asymptotes at 0, pi, and 2pi and I know how to graph the base points but I am confused on how to move it with the phase shift. Do I use a table of value for the asymptotes and base points to move?

*November 29, 2015*

**Solving Trig Equations**

Solve for x in the interval [-pi,0] a) sin^2x = 3/4 I know that you have +root3/2 and -root3/2 and the positive one gives you an error when doing the inverse of sin, but im confused about the -root3/2. I found that one of the answers of x is -pi/3 (-60 degrees) which fits my ...

*November 27, 2015*

**math**

Thanks Damon! =)

*November 24, 2015*

**math**

Michael estimated his mass as 8 kilograms. Is his estimate reasonable? Justify your answer. Please help me thanks.

*November 24, 2015*

**math**

Can you make that more clear? I still don't get what you mean.

*November 24, 2015*

**math**

The label on a can of lemonade gives the volume as 12 fl oz, or 355 mL. Verify that these two measurements are nearly equivalent. Please help me with this question.

*November 24, 2015*

**Advanced Functions**

How would I do this: -cos(90-x) I know you would use the compound angle formula and I know how to do it but when you have -cos do you replace the cos with the negative? so for example -cos90(-cosx) + sinx(sin90)

*November 14, 2015*

**English**

Which word best matches the meaning of want best used in this sentence? (Many a time we were near suffocation, from the want of fresh air.)

*November 4, 2015*

**Science**

#3 is A and #5 is a

*October 24, 2015*

**math**

Five coupons of values $2,six coupons of values $3,two coupons of values $5 and two coupons of values $8 are put into a small box.Two coupons are drawn at random from the box without replacement.Calculate the probability that (b)the total value of two coupons is $10. [Answer:...

*August 13, 2015*

**Biology**

325

*July 8, 2015*

**physical science**

A man applies a force of 150N to pull a 20kg box with a rope that makes an angle of 60percent with the horizontal.The box experience a kinetic friction of 15N. Calculate the acceleration of the box.

*June 6, 2015*

**english essay**

Yup..all of it are shouldnt

*April 4, 2015*

**english essay**

Pls help me..give me a best sample of introduction (paragraph 1) and Conclusion(p.6) & keywords of the contents(p.2-5) about "Why people should quit gambling."

*April 4, 2015*

**Physics**

A 1500kg car is travelling around a large roundabout of radius 40m at a constant speed of 50kmh-1. Calculate the time it takes to go halfway aound the roundabout. Just wondering which equation I should use. Thanks

*March 26, 2015*

**addmath A.P.**

ASAP.. I knw the (a) a=5,d=5 But the (b) how to do?

*March 8, 2015*

**addmath A.P.**

An arithmetic progression has 8terms.The sum of all 8terms is 180 and the sum of all odd terms is 80. Calculate (a)the first term and common difference (b)the last term

*March 8, 2015*

**addmath A.P.**

Thanks Steve

*March 7, 2015*

**addmath A.P.**

Tn=3n-2 Find the first term,a;the common difference,d;and then find the 5th term.

*March 7, 2015*

**Genetics biology**

if what I read is correct then wouldn't the answer be yes he can sue since he is neither colorblind and even if the mother was color blind carrier it woudnt matter cause it has to be the father to pass it down also in his gene?

*February 20, 2015*

**Genetics biology**

A man and his wife both have normal vision, but a daughter who has color blindness can the man sue his wife for infidelity? show the cross help me please, have been lots of people saying no and yes to this

*February 20, 2015*

**Math**

6^7 x 6^11 divided 6^8 x 6^2

*February 15, 2015*

**Math**

3^12 divided 3x3^6

*February 15, 2015*

**factorization**

504

*February 6, 2015*

**factorization**

891 is wrong. Any multiple of 105 is the answer.

*February 6, 2015*

**addmath A.P.**

A wire of length 380 cm is cut into 10 pieces.Each piece is then bent to form a square.The dimensions of the first three smallest squares are shown below.Find the value of x and hence,the area of the eighth largest square. x cm[ ] (x+1)cm [ ] x cm (x+1)cm (x+2)cm[ ] (x+2)cm ...

*January 18, 2015*

**addmath**

Thank u

*January 18, 2015*

**addmath**

Find the total number of integers between 10 and 1000 that are divisible by 3.

*January 18, 2015*

**addmath A.P.**

Ohh..thank u ^^

*January 14, 2015*

**addmath A.P.**

The first three terms of an A.P. are p-5,p-3 and 2p-15.If the sum of the first n terms of the progression is 180,find the value of n. Answer:n=10

*January 14, 2015*

**addmath A.P.**

Yup..Thanks a lot!

*January 12, 2015*

**addmath A.P.**

The first three terms of an arithematic profgression are x,2x+y and 9x-y.The sum of these three terms is 60.Find the numerical values of x and y.Then,calculate the eleventh term of the progression

*January 12, 2015*

**addmath**

Thank you..

*January 12, 2015*

**addmath**

Given that k,3k and k+1 are three consecutive terms of an A.P,find the numerical value of k.Then find the first term if 3k is the sixth term of the progression. Answer:k=1over4 a=-7over4 I got the k but the a i can't get

*January 12, 2015*

**Chemistry**

The Ksp of calcium hydroxide, Ca(OH)2, is 4.68 x 10-6 at 289.15K. Calculate the pH of a saturated solution. Here's my work: 4.68 x 10-6= 4s^3 s= 0.0105 -log(0.0105)= 1.98 14-1.98=12.02 The answer is supposed to be 12.324, but I'm not sure what I'm doing wrong. Is ...

*December 4, 2014*

**Genetics**

A portion of alcohol dehydrogenase enzyme contains 375 amino acids. Including both amino acid and all other necessary codes, how long is the coding portion of the corresponding mRNA? Thanks

*November 16, 2014*

**Help With Statistics**

I would really appreciate help with this. In a survey of 1000 large corporations, 252 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job. Find a 0.95 confidence interval for p. (Round your answers to...

*November 12, 2014*

**Math**

A family purchased a new ski boat for $20,000. The loan agency required a down payment and financed the balance for 36 months with an APR of Determine the total finance charge and monthly payment for the loan.

*November 9, 2014*

**Chemisty**

In the titration of total acid with sodium hydroxide, NaOH, it was determined that 36.03mL of 0.0980M NaOH was needed to neutralize all the acid in a 10.0mL aliquot of a powdered drink mix solution. In a second titration, it was determined that were 1.45 x 10^(-5) moles of ...

*October 22, 2014*

**Chemisty**

Consider the reaction of sulfuric acid, H2SO4, with sodium hydroxide, NaOH. H2SO4(aq) + 2 NaOH(aq) -> 2H2O(l) + Na2SO4(aq). Suppose a beaker contains 35.0mL of 0.175M H2SO4. How many moles of NaOH are needed to react completely with sulfuric acid? Thank you

*October 22, 2014*

**Chemistry**

What volume of 5.0 M H2SO4 should be diluted to 100mL to prepare a 0.25 M H2SO4 M solution? I know the molar mass of H2SO4 is 98g but I'm not sure where exactly that fits in and how I'm supposed to get it to be diluted. Thank you!

*October 8, 2014*

**math**

2+2

*August 1, 2014*

**Psychology**

analyze the function of emotions as motive.

*July 19, 2014*

**economics**

Using an aggregate demand and supply diagram, explain how each of the following scenarios affects the equilibrium price level and aggregate output. Consider first the short-run, then the long-run equilibrium for each scenario. a) Consumers expect a recession, while resource ...

*July 15, 2014*

**math**

There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...

*July 7, 2014*

**Riddle**

Haha wow..

*July 7, 2014*

**math**

In a bag,there are 18 cards of which x cards are coloured and the rest are white.When another 6 white cards are added into the bag,the probability of a white card being picked is x over 8.Find the value of x. Answer:6 How?

*July 7, 2014*

**add maths**

A point P moves so as to satisfy the ratio OP:PA=1:3,where O is the origin and A is the point (-4,0).Find the equation of the locus of P.

*June 14, 2014*

**add maths**

A point moves such that its distance from point A(1,0) is twice its distance from B(-2,0).Find the equation of the locus of the point.

*June 14, 2014*

**chemistry pls help me asap**

Thanks a lot^^

*May 15, 2014*

**chemistry pls help me asap**

2.08g of metal Y react with 0.96g of oxygen to form a metal oxide.The empirical formula of the metal oxide is Y2O3.What is the relative atomic mass of metal Y.

*May 15, 2014*

**chemistry**

Solution A:50cm^3 of 1.0mol dm^-3 hydrochloric acid,HCl Solution B:10cm^3 of 2.0mol dm^-3 hydrochloric acid,HCl (a)Calculate the number of moles of hydrochloric acid,HCL in each solution. (b)Solution A and B are mixed together. (i)Calculate the number of moles of hydrochloric ...

*May 7, 2014*

**chemistry pls help me asap**

100cm^3 of a sodium hydroxide,NaOH solution contains 4.0g of solid sodium hydroxide,NaOH.40 cm^3 of phosphoric acid,H3PO4 is needed to neutralise 40cm^3 of the alkali.(RAM:H,1;O,16;Na,23;P,31) (a)Calculate the molarity of the sodium hydroxide,NaOH solution. (b)Calculate the ...

*May 7, 2014*

**chemistry**

200cm^3 of 1.0 mol dm^-3 sulphuric acid,H2SO4 is poured into a 250 cm^3 volumetric flask.Distilled water is then added to make 250 cm^3 of solution. (a)What is the molarity of the diluted acid solution? (b)What is the volume of 1.6 mol dm^-3 sodium hydroxide,NaOH solution ...

*May 7, 2014*

**chemistry**

A student dissolved 3.65 g of hydrogen chloride gas,HCL in water to make 1.0dm^3 of solution.Calculate the volume of a 0.1 mol dm^-3 barium hydroxide,Ba(OH)2 solution required to completely neutralise 25.0 cm^3 of the acid solution.(RAM:H,1;CL,35.5)

*May 7, 2014*

**chemistry**

The volume of 0.15 mol dm ^-3 sulphuric acid,H2SO4 required to completely neutralise 25.0cm^3 of potassium hydroxide,KOH solution.

*May 7, 2014*

**chemistry**

50.0cm^3 of 2.0 mol dm^-3 aluminium sulphate,Al2(SO4)3 solution Calculate the number of moles of ions.

*May 7, 2014*

**chemistry**

Concentrated phosphoric acid,H3PO4 was added slowly into some water to produce 5.0dm^3 of a dilute acid solution.100g of the pure phosphoric acid,H3PO4 was present in the solution.Find the concentration of the acid,in g dm^-3.

*May 5, 2014*

**chemistry**

Calculate the volume of 2.0 mol dm^-3 sulphuric acid,H2SO4 needed to prepare 2.5 dm^3 of 0.5 mol dm^-3 of the same acid solution.

*May 5, 2014*

**add maths**

Find the equation of the perpendicular bisector of the straight line joining the points A(-1,0)and B(3,4).

*May 5, 2014*

**add maths**

Given that log2 3=h and log2 5=k, express log2 0.45 in terms of h and k.

*May 3, 2014*

**add maths**

Given that x=a^m and y=a^n.Express log^a(3 square root x over ay^2) in terms of m and n.

*May 3, 2014*

**add maths**

calculate the value of log square root p p^2.

*May 3, 2014*

**add maths**

Find the value of logb square root b - loga(1/a)

*May 3, 2014*

**math**

Oh thanks..its 2^5=32..

*April 2, 2014*

**math**

Given a set with n elements has 2^n subsets.Find the number of subsets for set A={2,3,5,7,11}.

*April 2, 2014*

**add maths**

10^2n+3 × 20^n × 5^n Step:? Answer:10^4n+3

*April 2, 2014*

**Algebra**

If a salesman earned 6% commissions on sales, and in one week he earned $300 in commissions, how much merchandise did he sell that week?

*March 19, 2014*

**Business Math**

True Value received an invoice dated 4/28/12. The invoice had a $5,700 balance that included $600 freight. Terms were 5/10, 4/30, n/60. True Value pays the invoice on May 12. What amount does True Value pay?

*February 27, 2014*

**Business Math**

A local Barnes and Noble paid a $79.33 net price for each calculus textbook. The publisher offered a 10% trade discount. What was the publisher’s list price? (Round your answer to the nearest cent.)

*February 27, 2014*