Saturday
July 23, 2016

Posts by karla

Total # Posts: 191

Math
Mandy runs 4 km in 18 minutes if she planes to run in a 15 km race how long will it take her to complete the race
May 6, 2016

Chemistry-nudge the
A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C
February 25, 2016

Chemistry
A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C
February 25, 2016

Chemistry
Assuming ideal behavior, determine the mole fraction of acetone in a solution of acetone and water if the vapor pressure of acetone changed from 750mmHg to 735mmHg.
February 15, 2016

Social Studies
A. Warmer Ocean Temperatures
January 14, 2016

Math
Genrald and Michelle went on a 24-mile bike ride. They rode 1/4 of the distance before stopping. By lunchtime, they rode 5/8 of the total distance. How many miles did they have left to ride after lunch?
November 10, 2015

math
Greg has a dollar bill, quarters, and dimes. how many ways can he make $1.75?
November 9, 2015

math
grant pays $0.10 per minute plus $5 per month for telephone long distance write an algebraic expression for m minutes of long distance calls in one month
October 1, 2015

math
a slice of pizza has 290 calories to find out how many write an algebraic expression to find out how many calories there are in a slices of pizza and b stalks of celery
October 1, 2015

math
the Nile River is the longest river in the world that 4160 miles a group of explorers travel along the entire now in xx days they traveled the same distance each day write an algebraic expression to find out each day's distance
October 1, 2015

math
the types of mini food players as it is triple plays in band is there in flute players write an algebraic expression to find out how many trumpet players there are
October 1, 2015

maths
How many red beads would there be in a pattern with 78 blue beads?
September 28, 2015

Math
37.68 cm^3
September 14, 2015

college chemistry
When a solution containing 8.00 g NaOH in 50.0 g of water at 25 °C is added to a solution of 8.00 g of HCl in 250.0 g of water at 25 °C in a calorimeter, the temperature of the solution increases to 33.5 °C. Assuming that the specific heat heat of the solution is ...
June 23, 2015

Algebra
in what form is the following linear equation written? 3x-2y=4 A.rise-run B.standard C.slope-intercept D.point-slope
June 16, 2015

math
The greatest integer function ,shows below, is defined to be greatest________less than or equal to x. f(x)=[[x]]
June 15, 2015

algebra 2
f(x)={2x,x<1} {5,x=1} {x^2,x>1} Given the piecewise functions shown below, select all of the statements that are true. A.f(5)=1 B.f(2)=4 C.f(-2)=4 D.f(1)=5
June 15, 2015

algebra2
is f(x)= x^3-x^2-9x+9 a one to one function
June 15, 2015

algebra2
hoe many solutions are there to the equations below? 8x+47=8(x+5)
June 10, 2015

algebra2
how many solution are there to the equation below? 3x-10(x+2)=13-7x A.1 B.0 C.Infinitely many
June 10, 2015

algebra2
How many solutions are there to the equation below? 220=2x-12x a.1 b. Infinitely many c.2
June 10, 2015

algebra2
how many solutions are there to the equation below? 6x+30+4x=10(x+3) I want to know how to do this problems Please and Thank you
June 10, 2015

algebra2
How many solutions are there to the equation below? 145=10x-8x
June 10, 2015

Algebra 2
What is the solution to this equation? 4(x-8)+10=-10
June 10, 2015

Math
There eight girls competing in an ice=skating competition. In how many ways can they finish in first, second and third place? 366 1,680 2,016 40,320 I think it is 2,016
May 17, 2015

psychology
please help it's due today.!
May 14, 2015

psychology
PLEASE HELP LAST QUESTION.??? Among William James's contributions to the science of psychology is that he A. he wrote the first American text in psychology b.. developed a psychodynamic treatment for mental illness. c.experimented with classical conditioning d. developed ...
May 14, 2015

ELA
b?
May 5, 2015

Science
What kind of substance has properties that reflects light very well, warms up in my hand, flattens out when it hits with a hammer and conducts electricity?
March 16, 2015

Chemistry - Solubility
Ok, thanks for your help!
March 16, 2015

Chemistry - Solubility
Thanks! Just to clarify, is CuS considered a solid and not included in the calculation of k? I made an ice table and got the following equation: x^2/(0.150-4x)^4 = 2.66 x 10^-7 Is this the right process? Thanks.
March 16, 2015

Chemistry - Solubility
Calculate the solubility of copper(II) sulfide in a solution that is 0.150 mol L^-1 in NaCN. I am very confused on what to do. Since there are no common ions, I know that this is not the common ion effect. Also I do not believe this is a pH effect question. Is this a complex-...
March 16, 2015

Trigonometry
Can you please help me verify these? >sin7x-sin5x= tanx(cos7x-cos5x) >(1-cosx)cot(1/2x) = sinx >1+tanx tan(x/2) = secx Its very confusing because of all the double-half angle formulas >_<
February 3, 2015

chemistry
A solution contains 3.10 g of solute in 10.4 g of solvent. What is the mass percent of the solute in the solution?
November 29, 2014

math
Suppose you take out a loan for 180 days in the amount of $13,500 at 11% ordinary interest. After 50 days, you make a partial payment of $1,000. What is the final amount due on the loan?
October 23, 2014

math
198/18=11
October 23, 2014

Math
A bus is traveling at 79.7 kilometers Er hour east, how far does the bus travel 1.45 hours?
October 10, 2014

Math: Finance
Need help solving these finance questions? PV = C/r PV= C/r-g P= D/r-g 1st: Tom is 30 years old today. His salary next year will be $20,000. He forecasts salary growth of 5%/year and plans to retire at 60. 1) If the discount rate is 8%, what is the PV of his future salary ...
October 8, 2014

Math
The answer is 4 because 9-5=4. Not exactly sure how this is the answer, but that's the answer.
September 22, 2014

geonetry
What is the area of sector CED when DE = 15 yd?
July 3, 2014

Can you help me find the answers?
3n+5
June 5, 2014

math homework
What is the perimeter of a triangle whose sides measure 21cm, 16cm, and 19cm?
April 17, 2014

chemistry
how many moles of H2O are produced when 5.00 mols of oxygen gas are used
March 25, 2014

math
Finney & Company purchased $1,800 of merchandise on 5/6. The terms were 2/15 EOM. The sneakers were received on 5/20, sent FOB Shipping Point. Freight charges amounted to $45. What payment must be made by that date to take advantage of the discount?
March 16, 2014

math
Bert wants to make a larger version of a drawing he saw in a magazine. The drawing fits into a square with each side measuring 7 cm. If Bert makes his copy twice the size of the square measured in the original drawing, how much space will it cover on the paper he uses?
February 17, 2014

Algebra
t=56
January 26, 2014

math 5th
in the following addition problem, each letter stands for a different digit. Find the value of X, Y, and Z XYZ + ZYX _______ YYZY
October 10, 2013

physics
f a police car is traveling along at 40 mi/hr and speeds up to 90 mi/hr to catch a speeder and it takes a total time of 1hr to finally catch the speeder. what was the police car's acceleration?
September 9, 2013

Math
Cepheid variables are vital for measuring the distances of relatively nearby galaxies. What is the probability of finding a cepheid variable star? State ALL your assumptions
April 30, 2013

Chemistry
If 45g of a 2.2% NaHCo3 solution is to be prepared how many grams of NaHCo3 are needed
April 16, 2013

math
ms.joliet gave a math quiz to see how her small group was doing. what score would make the median 90, the mode 85, and the range 20 if she had the numbers listed below 85,85,90,?,100,85,80,100,90
February 8, 2013

Spanish please translate from spanish to english
1.) What is the higher premium? 2.) What is the lower premium? 3.) Is May 12. It is August 20. It's the first of December. Is December 1. 4.) Is twelve years old. 're Twelve. I have twelve.
February 8, 2013

Please translate from spanish to english
The Gutierrez family has two children. Ramon is 15. It is the oldest son. His birthday is August 20. Roger is 13. It is the youngest son. Roger's birthday is on December 1. Ramon and Roger have two cousins​​. They are called Lydia and Silvia. Lydia is 14 and is...
February 8, 2013

Math
Sally bought 3 tickets to the observation deck at the top of a skyscraper. She paid with a five-dollar bill and got 50 cents change. What was the cost of each ticket?
January 28, 2013

math
Nelson got a pack of 12 pencils he took three pencils to put in his desk at school and 2 pencils his locker at school what is a fraction of total pencils that nelson took to school?
January 9, 2013

English
What public health issue starts the escalation of misery in "top of the food chain"?
December 26, 2012

Macroeconomics
Consider the following data: The money supply in $1 trillion, the price level equals 2, and real GDP is $5 trillion in base-year dollars. What is the income velocity of money?
December 2, 2012

Business math/Finite
Find the amount accumulated in the sinking fund it $450 is deposited monthly for 20 years at 9% per year? (assume end_of_period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
November 28, 2012

Business math/Finite
How long to the nearest year, will it take an investment to double if it is continuously compounded at 4% per year
November 28, 2012

World Geography
When attacking Russia in 1941,Germany...
October 25, 2012

physics
How many significant figures are in 24.010
October 22, 2012

chemistry
Thank You!!!
October 12, 2012

chemistry
In a 1.0x10^-4 M solution of HClO(aq), identify the relative molar amounts of these species:HClO, OH-, H3O+, OCl-, H2O
October 12, 2012

physics
a car skids to a halt at a rate of -9.4 m/s2. the skid marks measure 34 m. what speed was the car going when it slammed on the brakes?
September 17, 2012

algebra 2
how do i find the are of the region defined by |x|+|y| less than or equal to 5 and |x|+|y| greater than or equal to?
September 11, 2012

algebra 2
how do i find the are of the region defined by |x|+|y| less than or equal to 5 and |x|+|y| greater than or equal to?
September 11, 2012

math
i believe its 1.9
September 11, 2012

PHYSICAL SCIENCE
An object has a length of 5.0 cm, a height of 3.0 cm and a width of 15.0 cm. It has a mass of 24 grams. What is its density?
September 11, 2012

Physics
Large boxes of pumpkins are set on a ramp to be unloaded out of a truck. The 300.0 lb boxes are set on the ramp which has an incline of 35 degrees. They must then be pushed to get started down the plane towards the bottom. If the coefficient of the static friction between the ...
September 4, 2012

College Physics
Large boxes of pumpkins are set on a ramp to be unloaded out of a truck. The 300.0 lb boxes are set on the ramp which has an incline of 35 degrees. They must then be pushed to get started down the plane towards the bottom. If the coefficient of the static friction between the ...
August 30, 2012

Physics
Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?
August 30, 2012

Physics
Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?
August 30, 2012

science
the patient reports numbness and tingling in the left lumbar area and pain in the contralateral femoral region
August 28, 2012

science
the patient reports numbness and tingling in the left lumbar area and pain in the contralateral femoral region
August 28, 2012

math
A new car comes in 5 exterior colors and 3 interior colors. How many different-looking cars are possible?
August 19, 2012

math
If Christopher wants to have the same number of hot dogs and buns, what is the minimum number of hot dogs he will have to buy?
July 30, 2012

chemistry
25mL of tap-water is titrated with .00500 M EDTA. 7.95mL of EDTA is required for complete reaction, Whatis the molarity of that total water hardness in the 25mL sample
May 1, 2012

economics
What do brokerage firms charge fees on
April 17, 2012

Math
I'm having a hard time with this problem. The book tells you the answer is 5, but I don't know how they got there. log(x+25)= 1+ log(2x-7)
April 9, 2012

ap world history
Can you compare North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society in 1500-1830?
March 21, 2012

4th grade math
mia gave1\3 of her 24 marbles to david how many david get
March 12, 2012

Business Finance
Assume a bank loan requires a interest payment of $85 per year and a principal payment of $1,000 at the end of the loan's eight-year life. a) How much could this loan be sold for to another bank if loans of similar quality carried a 8.5 percent interest rate?
March 1, 2012

physics
What is the length of a box in which the difference between an electron's first and second allowed energies is 1.30×10−19 ?
February 28, 2012

math
if the drama club would want 120 to people see them act and want to fill up 10 rows how many people are in each row
February 8, 2012

math
how do i show my work for, 5+10/(1*(8+6)-4=6 ya i know the answer but i wanna know how to show my work.
January 9, 2012

math
tbh idk im really lost and I also really hate math so yah! I was looking for the same answer and soo well bye!
December 7, 2011

english
Phil
November 7, 2011

Physics
Thanks!
September 25, 2011

Physics
During a lawnmower race, a rider starts from rest and accelerates at 1 m/s/s for 10 seconds. The rider then maintains a constant velocity for the remainder of the race, which takes an additional 20 seconds. A) How far was the race? B) What was the lawnmower's average ...
September 25, 2011

Physics
Does he get what back?
September 11, 2011

English
This is about The perfect Picture- byJames Thom What purpose does Thom's introduction serve and how did it affect you? How would the meaning of Thom's essay change if his essay started with paragraph 2 instead?
September 11, 2011

English
This is about Sound and Fury- Dan Greenburg Where is Greenburg's point stated in his essay and what is his point? How would the meaning be different if Greenburg had ended his essay with paragraph 29?
September 11, 2011

History Project Suggestions
I suggest LBJ I mean lol *
September 11, 2011

History Project Suggestions
I can choose two ! I really wish Reagan was here :(
September 11, 2011

Chemistry
of 1.79 M CuSO4(aq).
September 5, 2011

Maths
Hey :) I was wondering if someone could tell me if this answer and working is correct or not... Cos theta =-0.25 Cos inverse -0.25 = -14 therefore theta equals: 180--14=194or/and 180+-14=166 Any help would be much appreciated :) Thanks!
August 29, 2011

math
i must be 310.4 because its bigger than the first answer.
May 15, 2011

Chemistry
At standard temperature a gas has a volume of 275ml if the temperature is increased to 130C buit the pressure is held constant what is the new volume?
April 19, 2011

statistics
John drives to work each morning and the trip takes an average of  = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of  = 5 minutes. For a randomly selected morning, what is the probability that John's drive ...
April 17, 2011

Chm General 2
if a student doing an experiment failed to dry the KHP before using it to standarize the NaOH solution. A) Would her calculated molarity of the NaOH solution probably be too hight or too Low?
March 23, 2011

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