Sunday
February 7, 2016

Posts by Haley

Total # Posts: 467

chemistry
which are ionic compounds? SO2 PCl3 NaBr PbO AlF3
April 11, 2012

Chemistry
A H2= (H1)(H3)/(H4)
April 10, 2012

math
please help simplify (3y/x^4)^-3 1/(1+square root of a) what would be the best solution: (1)/(x-2) +8= (x)/(x-2)
April 7, 2012

Statistics
Find the probability P(E or F) if E and F are mutually exclusive and P(E)=0.30 and P(F) =0.47
March 27, 2012

Chemistry honors
You have 2.657 x 10^2 mL of oxygen gas (O2) at 7.02 x 10^2 mm of Hg and 46 oC. What is the mass of the sample in milligrams?
March 22, 2012

English
Doing an assignment on act 4 scene 1-2 of Romeo and Juliet's symbols I have to use these symbols and find an object for each one that reflects it it needs evidence too Here are the symbols and thanks for all your help Love Foolishness of the feud Extremes Loyalty Dreams/...
March 17, 2012

math
prove the identity : cos^4 theta- sin ^4 thetaover sin squared theta cos squared theta =cot squared theta - tan squared theta
March 14, 2012

physics
A batter hits a pop-up straight up over home plate at an initial velocity of 29 m/s. The ball is caught by the catcher at the same height that it was hit. At what velocity will the ball land in the catcher's mitt? none of these 29 m/s 14.5 m/s -14.5 m/s -29 m/s
March 5, 2012

physics
You are playing right field for the baseball team. Your team is up by one run in the bottom of the last inning of the game when a ground ball slips through the infield and comes straight toward you. As you pick up the ball 62 m from home plate, you see a runner rounding third ...
March 5, 2012

physics
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 42 m/s and at an angle of 33°. A cannonball that was accidentally dropped hits the moat below in 1.6 s. (a) How far from the castle wall does the cannonball hit ...
March 5, 2012

physics
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25 m/s at an angle of 28° above the ...
March 5, 2012

physics
A ball thrown horizontally at 27 m/s travels a horizontal distance of 51 m before hitting the ground. From what height was the ball thrown?
March 5, 2012

7
I got C
March 4, 2012

Chemistry 101
if 95j of heat is added to a pure gold coin with a mass of 16 grams, what is its temperature change? Specific heat capacity of gold is 0.128 j/g degrees C.
February 24, 2012

math
If 16 points are arranged in a circle, how many lines are needed to join every point at once?
February 16, 2012

math
If 16 points are arranged in a circle, how many lines are needed to join every point at once?
February 16, 2012

college math
Assume that there are 11 girls and 9 boys in the neighborhood club, and a team of 6 is to be selected. How many different teams can be selected if each team must contain exactly 3 girls and 3 boys?
February 13, 2012

Chemistry 101
A bag contains a mixture of copper and lead BBs. The average density of the BBs is 9.60g/cm cubed. What is the percent of copper and the percent of lead?
February 12, 2012

math
5 inches by 7 inches, and the box must be at least 4 inches tall. What is the least possible volume of a box, in cubic inches, that meets these requirements?
February 12, 2012

chemistry
If 6.57 g of iron are reacted with an excess of hydrochloric acid, HCI, then hydrogen gas and14.63 g of iron (III) chloride are obtained. calculate the theoretical yeild and percent of yeild of FeCl3.
February 7, 2012

math
what order are these fractions from least to greatest 1/7,1/9,2/7,1/12 2 5/6,9/8,3 1/8,3 1/9 5/9,10/3,2 1/4,3/2 11/2,4 1/2,1/100,5 1/4
February 7, 2012

Algebra
Thank You
January 30, 2012

Algebra
Given the function f(x)=2x²-7x+4,find f(10)=? *2x squared
January 30, 2012

history
General Grant's army came closest to defeat in the West as a result of a surprise Confederate attack at the Battle of A)vicksburg B)Fort henry C)Shiloh D)manassa
January 12, 2012

Math 109
Your cousin has just won the lottery and wants to create an account that will have $100,000 in 16 years to help pay for their child's college tuition. If the account has a fixed interest rate of 4.6% compounded 4 times each year, how much money should they put into the ...
December 10, 2011

chemistry
#3 is the answer, CuO is the limiting reactant
December 6, 2011

chemistry
What is the wavelength of a 2500 kg truck traveling at a rate of 70 km/h?
November 28, 2011

Physics
An ideal gas is compressed at constant pressure to one-half its initial volume. If the pressure of the gas is 120 kPa, and 760 J of work is done on it, find the initial volume of the gas.
November 21, 2011

social studies
was the oldest of the three africian kingdoms?
November 21, 2011

Pre calculus
A window is made up of a circle embedded in a rectangle so that the diameter of the circle is a side of the rectangle. Find the demensions that will admit the most light if the perimeter ofthe window is 44 meters.
November 20, 2011

Chem
Seawater contains approximately 3.5% by mass and has a density of 1.02 g/mL. What volume of seawater contains 5.5g of sodium
November 14, 2011

math
how do you find the slant asymtote of f(x) = (x^3)/(x^2-1) ?
November 1, 2011

Calculus
What is the second derivative of (x^3)/(x^2-1)?
November 1, 2011

Calc-please help!
What is the second derivative of (x^3)/(x^2-1)? And how would I accurately graph both the derivative and the second derivative of this function?
November 1, 2011

CHEMISTRY HELP
56.3
October 17, 2011

CHEM 112
A buffer solution is 1.40 M in NH3 and 1.00 M in NH4Cl. If 0.100 moles of NaOH are added to 1.00 L of the buffer, what is its pH?
October 6, 2011

CHEM 112
A buffer solution is 1.40 M in NH3 and 1.00 M in NH4Cl. If 0.100 moles of NaOH are added to 1.00 L of the buffer, what is its pH?
October 6, 2011

chemistry
Suppose we want to charge a flask with 4.0 g of sugar. We put the empty flask on a balance and it is determined to weigh 190 g. Enter the weight we would expect to see on the balance when we're done adding the sugar.
September 27, 2011

Math
yes
September 26, 2011

Math
I am having a problem understanding my homework. use the grid to draw a rectangle, then complete the calculation 23 x17 Help thanks
September 26, 2011

calculus
using f'(x) as the limit of h approaches 0 [f(x+h)-f(x)]/h find: f'(x), given f(x)=|x|
September 23, 2011

language arts
sentence
September 21, 2011

language arts
verb is to ______ as zipcode is to address (unscramble) csteeenn
September 21, 2011

Algebra 2
what is .5 cubed?
September 11, 2011

algebra 1
4+x/8=3/4
September 8, 2011

math
find the coordinates of the missing endpoint given that p is the midpoint of NQ N(5,4) P(6,3) Q(3,9) P(-1,5)
August 30, 2011

algebra
every inch on a model is equivalent to 3.5 feet on the real boat. what would be the mathmatical rule to express the relationship between the length of the model, m, and the length of the boat, b?
August 16, 2011

Geometry
Which equation can be used to find the unknow ange measures? The diagram is a triganle. A= x+30, B= 3x, and C = x-15 A 5x+15=90 B 5x+45-180 C 3x^3+15=180 D 5x+15=180 E 3x+30=180
July 19, 2011

Chemistry
A sample of gas occupies a volume of 500.0mL at .906 atm and 97 C. What will the final temperature (in Celsius) be if it is brought to a volume of 1.05L and a pressure of 502 mm Hg?
July 11, 2011

physical science
the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.
July 8, 2011

biology
what is the scientific study of heredity
July 4, 2011

math
27 bags
May 17, 2011

math
25.6
May 17, 2011

science
whats the breakdown of water to form two gases is the result of this process?
May 16, 2011

Finance
I need help computing the Annual percentage yield (APY) for a savings account that earned $56 in interest on $800 over 365 days? HELP PLEASE!
May 14, 2011

Finance
I need help computing the Annual percentage yield (APY) for a savings account that earned $56 in interest on $800 over 365 days? HELP PLEASE!
May 14, 2011

Math
Jake spent 3/8 of his money on a book and 1/2 of what was left on a magazine. He now has $6.25. How much money did he start with?
May 3, 2011

science
What is the current produced by a potential difference of 240 volts through a resistance of 0.2 ohms?
April 26, 2011

social studies
what forms part of the escarpment along the southern edge of the african continent
April 24, 2011

English
1. Neither (she, her) nor I will be at the assembly today. 2. To (whom, who) did you address that package? 3. Mrs Jamison and (he, him) were my favorite teachers last year. 4. (Who, Whom) remembered to bring a flashlight? 5. Did the club elect (her, she) president? 6. (He, Him...
April 12, 2011

precalc
What are parametric equations? How would you find the rectangular eq's when given parametric eq's? and how would you find parametric eq's when given rectangular eq's? for example, given x=cos4t and y=sin4t (t is between 0 and 2pi) what is the retangular ...
April 7, 2011

precalc
solve the system of equations: x^(2)+y^(2) = 12 xy = -4
April 7, 2011

precalc
Find the equation of the parabola: x^(2)+4x = y-8
April 7, 2011

logarithms
thanks
April 7, 2011

logarithms
Please help, im so confused. how would you solve: 2log(subscript6)(4) - (1/3)log(sub6)(8) = log(sub6)(x)
April 7, 2011

logarithmic functions
so the coefficient of a log function are the same as writing it as an exponent of x in the equation: log(subb)x = y ? therefore, Clog(subb)x = y is the same as log(subb)x^(C) = y ?
April 7, 2011

logarithmic functions
okay. how would you solve: 2log(subscript6)(4) - (1/3)log(sub6)(8) = log(sub6)(x)
April 7, 2011

logarithmic functions
How do you just know this though?
April 7, 2011

logarithmic functions
log(subscript 2)(0.5) I know how to convert it into: 0.5 = 2^(y) but then how do I find y?
April 7, 2011

Chemistry
Explain exactly how you would make 1 liter of a .10 M acetic acid solution using vinegar from the lab as the stock solution to be diluter.
April 6, 2011

psychology
in my psychology textbook this is called the bystander effect with the answer choices you have i would say diffusion responsibility, but i am not sure. It is definitely not A though.
April 6, 2011

Excel
Want to create a worksheet that will help track your grades and. What formulas and/or functions might you use?
April 6, 2011

Math
John bought 2 pounds of chocolate for $7.50. Write expression to find the cost of 3.5 pounds of chocolate?
April 4, 2011

geometry
345.6
April 3, 2011

Early Childhood Education
A child’s oral vocabulary is closely related to: A. his printing ability and scholarship. B. reading comprehension and ease in learning to read. C. creativity and motivation. D. attention span and distractibility. I think the answer is A
April 2, 2011

physics
A block of mass m = 2.00 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 7.20 kg which is at rest on a horizontal surface Determine the speeds of the two blocks after the collision. lighter block = heavier block = what ...
March 24, 2011

physics
After a completely inelastic collision between two objects of equal mass, each having initial speed v, the two move off together with speed v/6. What was the angle between their initial directions? if this is the equation 2mvcos(theta)=2mv/6 what numbers would replace m and v?
March 20, 2011

chemistry
At pH 7.2, what is the ratio [HPO4 2-]/[H2PO4-]
March 15, 2011

chemistry
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10 -5
March 15, 2011

math
16_k=8 In the equation above, _ represents one of the operations of arithmetic: addition, subtraction, multiplication, or division. If k is a positive integer not equal to 8, what must be the value of k?
March 6, 2011

Math
What is the unit rate of 32 miles per hour?
March 3, 2011

Math
A 20-foot telephone pole casts a 4-foot shadow. what shadow length will the 6-foot man cast ? A) 1.2feet B) 2.1feet C) 2.2feet
March 3, 2011

Math
A 20-foot telephone pole casts a 4-foot shadow. what shadow length will the 6-foot man cast ? A) 1.2feet B) 2.1feet C) 2.2feet
March 3, 2011

Math
10 Jumps Thanks for all your help.
March 1, 2011

Math
a Frog is at the bottom of a 21 foot well. The frog jumps up 4 feet, and then falls back 2 feet. How many jumps will it take for the frong to jump out of the well?
March 1, 2011

Math
Thanks. Now I understand.
March 1, 2011

Math
After 7 jumps foward and 6 backward.
March 1, 2011

Math
I dont have any idea.
March 1, 2011

Math
Jump Number Position After jump forward Position after Step Back
March 1, 2011

Math
Barbara is playing a game. She jumps forward 5 feet, and then steps backward 2 feet. How many jumps will it take her to reach the finish line, which is 20 feet from where she started? Make a table to show Barbara's position. Barbara will reach 20 feet on jump number _____...
March 1, 2011

Physics
An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of mass m1 = 2.80 kg ...
February 27, 2011

Physics
How many rpm's will a 2'' Nd45 sphere do spinning at 340.29 m/s. Please help me!! =(
February 13, 2011

Physics
How many rpm's will a 2'' Nd45 sphere do spinning at 340.29 m/s. Please help me!! =(
February 13, 2011

english/ grammer
thanks
February 10, 2011

english/ grammer
would you say: her aspiration of freedom or her aspiration for freedom ?
February 10, 2011

Math
Why does the division of zero equal one? I just do not understand the process. I've researched it and I have read the responses, but I do not understand them. Can Someone explain it further?
February 3, 2011

Physics
You serve a tennis ball from a height of 2.29 m above the ground. The ball leaves your racket with a speed of 18.7 m/s at an angle of 6.55° above the horizontal. The horizontal distance from the court's baseline to the net is 11.89 m, and the net is 1.07 m high. ...
January 30, 2011

math-precalc
In the shot put, the shot must land within a 40 degree sector. Consider a coordinate system where the vertex of the sector is at the origen, one side lies along the positive x-axis, and the units are meters. If a throw lands at the point with coordinates (16, 12), how far is ...
January 29, 2011

physics
m= .025 kg initial velocity= 27 m/s time= 5.0*10^-4 final velocity= 10 m/s Force*time=mass( final vecolicy - negative initial velocity) F(5.0*10^-4)=(.025)(10-(-27)) F=(.025)(10-(-27))/(5.0*10^-4)
January 25, 2011

Math (please help!)
The largest Ferris Wheel in the world is the London Eye in England. The height (in metres) of a rider on the London Eye after t minutes can be described by the function h(t) = 67 sin[0.2094(t-30)] + 70 Using this equation i'm supposed to find the diameter, the maximum (top...
January 23, 2011

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