Friday

December 19, 2014

December 19, 2014

Total # Posts: 385

**L.A**

1. b 2. Pumpkin and Paul Revere 3. A
*December 17, 2014*

**algebra**

15y-21=3(5y-7)
*December 15, 2014*

**Chemistry**

How do I do the empirical formula for 37.01% carbon, 2.22% hydrogen, 18.50% nitrogen, and 42.27% oxygen? My teacher gave me the answer (C7H5N3O6), but I can never get that answer.
*December 5, 2014*

**Did I get this right?**

Oh okay thanks =D
*November 11, 2014*

**Did I get this right?**

Find Derivative F(x)= (x-2)(x^2-3x-1) And I got F'(x)= (x-2)(3x-3)+ (x^2-3x-1)(1)
*November 11, 2014*

**Physcis**

What is the radius of a real or imaginary nucleus of 42X^85?
*October 27, 2014*

**Math**

how do you divide
*October 24, 2014*

**Maths**

Find the 2 and 3 digit factors of 4396 using the numbers 1-9.
*September 22, 2014*

**M.A.T.H**

Aha,thank u
*September 18, 2014*

**M.A.T.H**

Wait,is it just me or did u like trick me or something????? why u add 5 anyways and 10????????? oh well....ill figure it out
*September 18, 2014*

**M.A.T.H**

Thank u me and my twin Gracie were having trouble thanks a lot
*September 18, 2014*

**M.A.T.H**

USE THE RULE TO WRITE THE FIRST 12 TERMS IS THE PATTERN. Rule: Add 10,subtract 5 First term: 11 WEAKNESS HERE
*September 18, 2014*

**physics**

In a certain particle, a current of 0.50 mA is carried by a 5.0MeV proton beam that has a radius of 1.5 mm. Find the density of protons in the beam.if the beam hits a target, how many protons hit the target in 1.0s.
*September 11, 2014*

**Math**

Two ways to write 67,000 ----place value
*August 27, 2014*

**literature **

Hi, I'm doing a poem for a literature book called Red Sky In the Morning by Elizabeth Laird. The theme that my teacher assigned to me is'Anna's love for Ben'. It can be through her thoughts, words, actions or what other characters say about her love towards her...
*August 17, 2014*

**Biology**

It's a chemical reaction.
*July 23, 2014*

**SECONDARY ALGEBRA**

f(x)=(120m^3)x
*July 22, 2014*

**SECONDARY ALGEBRA**

A rectangular field is to be fenced off with 120 m of fencing materials. the length of the field is x. express the area in square meters of the field as a function of x.
*July 22, 2014*

**Distribution and warehousing**

What are the risks of distribution of goods and materials
*June 11, 2014*

**chemistry**

Calculate a value for the solubility of (NH4)2C2O4H2O in g/100 cm3 at 298 K
*May 21, 2014*

**math**

A number from 20 to 30 is drawn at random. Posibility of it not a 23
*May 13, 2014*

**math**

how much lottery revenue has been allocated to education in nc
*May 1, 2014*

**Math**

HELP A Certain state's lottery LOTTO, is set up so that each player pays $1 per ticket and chooses six different numbers from 1 to 49. if the six numbers chosen match the six numbers drawn each Saturday evening, the player wins the top cash prize. the order in which the ...
*April 30, 2014*

**math**

the sum of an integer and the next greater integer is at least 27. find the lesser integer.
*April 23, 2014*

**math**

which figure must have both parallel and perpendicular sides. 1.parallelogram 2. rectangle 3. rhombus 4. right triangles
*April 10, 2014*

**Chemistry**

Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25unknown_prefixC in your answer.) (b) the reaction of magnesium metal and hydrobromic acid
*April 2, 2014*

**Chemistry**

Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25unknown_prefixC in your answer.) (a) the dissociation of solid magnesium hydroxide in water
*April 2, 2014*

**Chemistry**

Write a balanced chemical equation that represents the self-ionization of water. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25°C in your answer.)
*April 2, 2014*

**Chemistry**

How many milliliters of 0.326 M HCl would be required to titrate 5.48 g KOH?
*April 1, 2014*

**Chemistry**

What are the molality and mole fraction of solute in a 32.3 percent by mass aqueous solution of methanol (CH3OH)? molality = ?m mole fraction =
*March 13, 2014*

**chemistry**

In the laboratory a student finds that it takes 20.7 Joules to increase the temperature of 11.0 grams of solid platinum from 20.5 to 35.8 degrees Celsius. What is the specific heat of platinum she has measured.
*March 11, 2014*

**Chemistry**

Possible Sources of error in a reaction or sodium bicarbonate and acetic acid. Also known as baking soda and vinegar.
*February 25, 2014*

**Chemistry**

When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 34.0 g copper(II) oxide is used?
*February 24, 2014*

**Chemistry**

In 1901, Thomas Edison invented the nickel-iron battery. The follwing reaction takes place in the battery. Fe(s) + 2 NiO(OH)(s) + 2 H2O(l) Fe(OH)2(s) + 2 Ni(OH)2(aq) How many mole of Fe(OH)2, is produced when 3.70 mol Fe and 6.95 mol NiO(OH) react?
*February 24, 2014*

**chemistry**

a 2.52-g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 4.23 g of CO2 and 1.01 g of H2O as the only carbon and hydrogen containing products respectively. Another sample of the same compound, of mass 4.14 g, ...
*February 15, 2014*

**math**

In the basketball game, Sarah made three times as many 2-point shots as 3-point shots. She made 8 shots in all. How many 2-point shots did she make?
*February 13, 2014*

**Math #rd grade**

Thank you! It was worded so weird I didn't know what they wanted. : )
*January 14, 2014*

**Math #rd grade**

Bryan has 3 nickels, 3 dimes, and 2 quarters. What fraction of the coins is either a dime or a quarter? There is a space for only 1 fraction answer.
*January 14, 2014*

**Spelling**

What is the antonym of brandishing? a) furbishing b) concealing c) defacing d) galvanizing
*January 8, 2014*

**us history**

How did immigrants regard public education? a. as an aid to assimilation b. as a threat to cultural heritage c. as a path to advancement d. all of the above
*November 25, 2013*

**English**

I have the sentence: Kyle seems calm despite his situation. Kyle is the subject, seems is the being verb, calm is a subject complement adjective that describes Kyle. My question is, is "...despite his situation" an adverb phrase? Is it describing calm or seems? Thanks,
*October 25, 2013*

**math**

In a class of 40 students, 27 like math and 25 like Filipino. At most how many students do not like at least one of these subjects?
*October 22, 2013*

**chemistry**

a tuning fork produces a sound of musical note middle C. It moves back and forth 256 time each second. What is the frequency of the tuning fork?
*October 21, 2013*

**grammar**

can you explain the predicate and complete predicate in a sentence
*October 3, 2013*

**Geography **

Why do the trees drop their leaves in the fall?
*October 2, 2013*

**Geometry**

The peremiter of triangly rst is 40 what is the perimeter of triange xyz
*September 8, 2013*

**calculus**

After solving with A=(-1,2) x^2+2x^2+x+1 got 119/12a pls where did i get it wrong. And with -[(-55)] x^2-25dx i got -50 pls am i correct
*September 7, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^2-25 for (-5) is less than or equal to x less than or equal to 5
*September 6, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3 and the straight line y=x
*September 6, 2013*

**calculus**

find the area enclosed between the x-axis and the curve, if y=x^3+2x^2+x+1 between x=-1 and x=2
*September 6, 2013*

**calculus**

Determine l= 2e^xdx, given that l=50.2, when x=3
*September 6, 2013*

**calculus**

int e^5xsin3xdx =
*September 6, 2013*

**calculus**

int dx/3sinx+4cosx dx =
*September 6, 2013*

**calculus**

int x^2/(x-2)(x^2+1)dx
*September 6, 2013*

**physics **

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?
*September 5, 2013*

**geometry**

Given that r1=6i-8j+2k,r2=4i+5j+7k,r3=-2i+j+6k is a vector. Find r1r2,r2r3,r3r1(a)30,21,-8(b)26,23,8(c)24,19,-7(d)19,27,7
*August 30, 2013*

**geometry**

if U=i+3j-2k and V=4i-2j-4k are vectors find U.V, 3U+V& (2U+V).(U-2V) (a)6,10,4(b)4143(c)11,4,5(d)5,11,6
*August 30, 2013*

**physics**

Two charges Q 1 =500/mu(C) and Q 2 =100/mu(C) are located on the XY plane at the positions r1=3/vec(j)m and r2=4/vec(i)m. Find the force exerted on the Q2(a)14.4/vec(i)+10.8/vec(j)(b)14.4/vec(i)-10.8/vec(j)N(c)10.8/vec(i)-14.4/vec(j)N(d)10.8/vec(i)+14.4/vec(j)N
*August 28, 2013*

**physics**

Two large horizontal metal plates are separated by 4mm. The lower plate is at a potential of (-)6v.What potential should be applied to the upper plate to create field strength of 4000v/m upwards in the space between the plates?(a)(+)22(b)(+)10(c)(-)10(d)(-)22
*August 28, 2013*

**Math**

nn jhb
*August 20, 2013*

**Math**

tom had 18 comic books , while Diane and Helen had none. Tom gave 1/3 of the comic books to Diane who passed 1/3 of these books along to Helen. If Tom then gave Helen 1/3 of the books he had left, how many comic books did Helen receive from Tom and Diane
*July 3, 2013*

**Math**

An airplane traveled a distance d in t hours, where r>1, and arrived one hour late. The airplane would have arrived on time if it had traveled at what rate per hour? a. t-1 b. d/t-1 c. d/t+1 d. d/t-1 e. d/t+1
*July 2, 2013*

**Math**

Each plant of a certain variety yields 50 seeds in the early fall and then dies. Only 40 percent of these seeds produce plants the following summer and the remainder never produce plants. At this rate, a single plant yielding seeds in 1986 will produce how many plants as ...
*July 1, 2013*

**Language barriers**

Females are passive
*June 28, 2013*

**Ganguage barriers**

If a child displays discriminatory behavior in the classroom, one should
*June 27, 2013*

**Language and other barriers**

An example of an exceptional child is one who
*June 27, 2013*

**World Geography**

D. Stopping French nuclear testing in the region. ~ I just took the test ~
*June 19, 2013*

**Technology**

Non system disc means
*June 17, 2013*

**Technology**

If you want to teach whole classes how to use computers, where is the best place to locate the computers?
*June 17, 2013*

**math**

At a point on the ground 80ft from the base of a tree,the distance to the top of the tree is 11ft more than 2 times the height of the tree. find the height.
*June 12, 2013*

**Physics**

What happens to the momentum of the truck if sand leaks at a constant rate through a hole in the truck bed while the truck maintains a constant velocity?
*May 26, 2013*

**life orientation**

6 ways in which earthquake can impact negatively on one's health
*May 14, 2013*

**math**

0.21 x 63 = 13.23
*May 9, 2013*

**Math**

A lighthouse is east of a Coast Guard patrol boat. The Coast Guard station is 20 km north of the lighthouse. The radar officer aboard the boat measures the angle between the lighthouse and the station to be 23°. How far is the boat from the station?
*May 8, 2013*

**Chemistry**

When I solve for H^+ I put 1.7 x10^-3 x 0.26. I got 4.42 x 10^-4. My pH is 3.35. Is that right?
*April 16, 2013*

**Chemistry**

Substance X (MW=356gm) is a weak acid. Its Ka is 1.7x10^-3. Calculate pH of725ml of the following solutions: a)Containing 0.187 mol of substance x b)containing 127gm of Substance x I have been trying to figure this problem out for hours now and do not get it. Please help me ...
*April 16, 2013*

**Chemistry**

Does that mean that I do not need to do an ICE table but just use the HH equation?
*April 16, 2013*

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)
*April 16, 2013*

**Chemistry**

Calculate the pH of the following buffer solution that resulted from 125ml of 0.1M NH3 with 250ml 0.1 M NH4Cl ( for NH3, Kb= 1.76x10^-5)
*April 16, 2013*

**Chemistry**

Three metals P,Q and R form three ionic solids with three nonmetals X,Y, ands Z respectively as follows P2X, QY2, and RZ3. If their molar solubilities are the same, how are their Ksp values related? Please not only explain but write the respective dissociation.
*April 16, 2013*

**algebra 2 (permutations & combinations)**

from a standard deck of 52 cards, how many different five-card hands can be drawn?
*April 10, 2013*

**science**

tundra
*April 4, 2013*

**Math**

What property is this? 4(7+9)=(4x7)+(4x9)
*April 2, 2013*

**Math**

One half of 9.76
*April 2, 2013*

**Math**

The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?
*April 2, 2013*

**Math**

What is a attribute?
*April 2, 2013*

**Chemistry**

When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.
*March 29, 2013*

**Chemistry**

You have two buffer solutions 1) weak acid and its conjugate base 2)weak base and its conjugate acid. Write explicitly ( considering generic formula for acid and base) the equations of neutralization when you: a) add strong acid and strong base 1) b) add strong acid or strong ...
*March 29, 2013*

**Math**

6 quarters, 4 dimes, 3 nickels, 10 pennies. what is the probability you will get at least one of each coin in change of 1 dollar
*March 26, 2013*

**chemistry**

what is the total heat lost if you have 8 grams of copper and the temperature changed from 43°C to 36°C
*March 24, 2013*

**Statistics**

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If sample proportion, P^, is the sample ...
*March 22, 2013*

**NJHS (essay)**

hi, i'm currently applying for the national junior honor society, and i'm working on my essay. any ideas what i should include??? ps. i have no leadership experience and the section is blank! D:
*March 20, 2013*

**Statistics**

Suppose a basketball player is an excellent free throw shooter and makes 90% of his free throws (i.e., he has a 90% chance of making a single free throw). Assume that free throw shots are independent of one another. Suppose this player gets to shoot three free throws. Find the...
*March 17, 2013*

**Basic Math Venn Diagram**

Hi! Having a lot of trouble with this one problem. The venn diagram problem is n(U)-n(B). I realize I did not post the venn diagram, I just need to know how to solve that type of problem using a venn diagram! Help would be greatly appreciated. : ) Thank you so much!! God ...
*March 7, 2013*

**Math**

Thx that really helped😄😃😜😝👍👍❕👏🎓🆗🆕🔝🆒 freind bump🆙
*March 7, 2013*

**Math**

I don't know what 4r=96 means. Also I don't know what 51=3n means!😰😁😱😨📝HELP! It's due tomorrow
*March 7, 2013*

**Physics**

A uniform ladder of 5.0 m long and 12 kg is leaning against the wall (contact with the wall = point b, contact with the floor = point a). The height from the ground to point b is 4m . The wall is frictionless but the floor is not. A painter of 55 kg climbs 75% of the way up ...
*February 24, 2013*

**MATH**

if 5 times a certain integer ìs subtracted from twice the square of the integer the result is 63. find the integer
*February 8, 2013*

**Algebra 1**

In 1991, the federal minimum wage rate was $4.25 per hour. In 1997, it was increased to $5.15. Find the annual rate of change in the federal minimum wage rate from 1991 to 1997.
*February 7, 2013*