Sunday
May 1, 2016

Posts by Becca

Total # Posts: 355

sience
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
February 6, 2013

business
describe how a manager would use the critical-incident appraisal method for assessing an employee?
February 5, 2013

Algebra
I need some help figuring these. Compute each product and simplify the result. I dont have the squareroot sign so put that meaning thats where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of 10)(1-2 squareroot of 10) ...
January 18, 2013

Algebra
Rationalize each expression by building perfect nth root factors for each denominator. Assume all variables represent positive quantities. I don’t understand how to compute these. Also I don’t have the square root sign so I typed it out where it would be and the ...
January 18, 2013

Algebra
I need some help figuring these. Compute each product and simplify the result. I dont have the squareroot sign so put that meaning thats where it goes with the number after it. 1. (0.3 Squareroot of 5)^2 2. (2+ squareroot of 5)^2 3. (5+4Squareroot of 10)(1-2 squareroot of 10) ...
January 18, 2013

english
When I called the college, they said they were still accepting applications.
December 14, 2012

Math, need help asap
The ramp shown below is used to move crates of fruit to loading docks of different heights. When the horizontal distance AB is 12 meters, the height of the loading dock, BC, is 4 meters. What is the height of the loading dock DE? 12 m 8 m 9 m 15 m
December 14, 2012

Statistics
FALSE... Sorry Math Guru. Conditions for a regression analysis are We have n observations on an explanatory variable x and a response variable y. Our goal is to study or predict the behavior of y for given values of x. For any fixed value of x, the response varies according to...
November 6, 2012

Physics
A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the diver before they ...
October 24, 2012

Physics
A 69 kg swimmer free-falls off a 10.0 m diving platform. The diver comes to a stop 2.7 m below the water's surface. What is the magnitude of the force exerted by the water on the swimmer. (assume a positive direction is up) I calculated the force on the diver before they ...
October 24, 2012

physics
The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
October 10, 2012

7th grade health question
1. eat nutrient dense food 2. a 3. b 4. d (pee goes through the urethra 5. a
October 10, 2012

AP Environmental Science
Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night?
October 10, 2012

math
how do u reduce 8 gal 9pt
October 7, 2012

Biology
some proteins (such as HBB) can vary quite a bit from species to species. others (ex., tubulin) vary little from species to species? Why?
September 27, 2012

Physics
Bob, Im not getting the same answer when i do plug in the H into finding the height of the apples and oranges
September 16, 2012

Physics
Wes and Lindsay stand on the roof of a building. Wes leans over the edge and drops an apple. Lindsay waits, 1.25s afrer Wes releases his fruit and throws an orange straight down at 28 m/s. Both pieces of fruit hit the ground simultaneously. Calculate the common height from ...
September 16, 2012

Scirnce/ math
If a pinecone was thrown from a height of 45 meters and hit the ground 4.5 seconds later, how fast was the pinecone traveling
September 9, 2012

Chemistry
How do you figure out how mch oxygen gas escaped when Potassium Chlorate is decomposed in a reation? Also what mass of Potassium Chlorate was decomposed in the experiment? I conducted the experiement but don't know how to do this.
September 3, 2012

cild care
its not c or b
July 23, 2012

algebra
if 2k - 4 = 8, then k is what
July 16, 2012

math
Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.
July 3, 2012

Math
okay so im doing homework and dont understand how to do it the question is -2 2/3+ d/6= 2/3 the little slash things are fraction things
May 20, 2012

Calculus
idk what tht is hehe
May 20, 2012

Poli sci
d) Cabinet secretaries
May 10, 2012

Geometry
(1)Is a trapezoid a square? false (2) if all sides of a quadilateralare congruent,the quadilateral is a rhombis? true or false
April 8, 2012

math
Preform the operation and write in standard form: (8+20i)/(2i)
April 3, 2012

APWH
thesis: How did the World Wars of the 20th century demonstrate the application of “total war?”
March 29, 2012

APWH
thesis: How did the World Wars of the 20th century demonstrate the application of “total war?”
March 29, 2012

chemistry
I understand you are supposed to separate into half reactions and balance using H20 H+ and e- however, when i start doing that I get confused halfway through. this is as far as I have gotten: 4e- + 7H+ + Cr2O72- = 2Cr3+ +7H20 2Sn2+ = 2Sn4+ +4e- then cancel electrons...is this ...
March 22, 2012

chemistry
When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)
March 22, 2012

algebra
triangle 1 is 6,16,32 triangle 2 is 9,24 h they are similar how do i find h?
March 12, 2012

koko
how did you come up with 29? Need help bad please anyone
March 6, 2012

Math help
If a trend line had the equation: y=x+9 what y value would you expect to obtain when x is 20??
March 6, 2012

math
what are the odds in favor of randomly drawing the letter m from the letters in the word remember? would it be 2 out of 8 would you simplify it to 1 out of 4??? help
March 6, 2012

Language Arts EnglishIII
Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. Due to the large storm approaching, three students, Jamie, Lisa, and I, were allowed...
March 1, 2012

Calculus
integrate: (square root of (y^2 -121))/y dy, y>11. I got (12(square root of (y^2-121))/12 -sec^-1 (y/12) +C but it's not right. I'm not sure where I am going wrong.
February 23, 2012

math
sin^2x+sin^2tan^2x=tan^2x
February 20, 2012

chemistry
When 26 mL of a 120 mL stock solution containing 3.23 M CaF2 is diluted to 35 mL, how many moles of F- are in the new solution
February 16, 2012

chemistry
When 26 mL of a 120 mL stock solution containing 3.23 M CaF2 is diluted to 35 mL, how many moles of F- are in the new solution
February 16, 2012

Chemistry/Engineering
A 25 gram sample of CT is vaporized and used to fill a 5 L container. If the pressure in the container is 1.2 atm at 27 degrees Celsius, what is the molecular weight of CT in grams per mole? I used PV=nRT and found n=.2437 mol, but how do I got to grams per mole? CT is a made-...
February 14, 2012

Chemistry
At what temperature would 1.3 m NaCl freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 deg C/m.
February 5, 2012

Chemistry
At a certain temperature, the solubility of N_2 gas in water at 2.38 atm is 56.0 mg of N_2 gas/100 g of water. Calculate the solubility of N_2 gas in water, at the same temperature, if the partial pressure of N_2 gas over the solution is increased from 2.38 atm to 5.00 atm.
February 4, 2012

Calculus
Find the volume of the solid whose base is the region bounded by y=x^2 and the line y=0 and whose cross sections perpendicular to the base and parallel to the x-axis are semicircles.
January 29, 2012

Calculus
I use this to check my answers. I apologize for not realizing that I should have proven to you that I was doing them by myself at first.
January 29, 2012

Calculus
Find the volume of the solid formed when the region bounded by y=3x^2 and y=36-x^2 is revolved about the x-axis.
January 29, 2012

Calculus
Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.
January 29, 2012

Calculus
Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line y=-2.
January 29, 2012

Biology/Chemistry
Consider that the human brain weighs about 1 kg and contains 10^11 cells. Assuming that each cell is entirely filled with water, and knowing that 1 cm^3 of water weighs 1 g, calculate the volume of a brain cell (in picoliters).
January 26, 2012

Chemistry
A sample of steam with a mass of 0.550 g and at a temperature of 100 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 25, 2012

quadratic equations
Thank you Steve, your a life saver,and I appreciate your help!!!
January 24, 2012

quadratic equations
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office...
January 24, 2012

Calculus
Find the volume of the solid generated by revolving the following region about the given axis. The region in the first quadrant bounded by the curve y=x^2, below by the x-axis, and on the right by the line x=1, about the line x=-2
January 24, 2012

Calculus
Use the disk method to find the volume of the solid generated when the region bounded by 4= 1/(fourth root of (1-11x)), y=0, x=0, and x=1/22.
January 24, 2012

Calculus
Use the disk method to find the volume of the solid generated when the region bounded by y=15sinx and y=0, for 0 </= x </= pi, is revolved about the x-axis.
January 24, 2012

Chemistry
Sorry, I never saw this response so I reposted it correctly! But I do have a question. I used 2257 kJ/kg for the heat vap. and 2.08 J/g*K for the specific heat of water. I'm still getting the problem wrong, am I plugging in the wrong numbers??
January 24, 2012

Chemistry
It is 100 degrees, I just mistyped!!
January 24, 2012

Chemistry
A sample of steam with a mass of .550 g and at a temperature of 1 degrees C condenses into an insulated container holding 4.40 g of water at 5.0 degrees C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
January 24, 2012

chemistry
How much energy (in kJ) is released when 16.4 g of steam at 121.5 degrees C is condensed to give liquid water at 60.5 degrees C? The heat of vaporization of liquid water is 40.67 kJ/mol and the molar heat capacity is 75.3 J/(K*mol) for the liquid and 33.6 J?(K*mol) for the vapor.
January 24, 2012

algebra
I need help breaking down the steps to solve HELP ME PLEASE solve with an exact answer. x^2 + 2x - 8
January 17, 2012

Quadraitic equations
Thank you so much and I definetly need to review how to factor equations<<<good night and sweet dreams>>>thank you for helping me
January 17, 2012

Quadraitic equations
Can you show me the steps please???? to solve this equation.
January 17, 2012

Quadraitic equations
solve with an exact answer. x^2 + 2x - 8
January 17, 2012

quadratic equations
can you solve the equation using the quadratic formula x2 + 3x = 7? Explain and provide an exact answer.
January 17, 2012

algebra
Thanks
January 17, 2012

algebra
a two part canoe trip,the first part of the trip the canoist traveled 58 miles.Second part of the trip he traveled 18 miles at 5mph slower.the total time for trip was 4 hours.What was the speed of both parts of the trip?
January 17, 2012

algebra
Thank you!
January 17, 2012

algebra
solve by completing the square x^2-10x=10
January 17, 2012

calculus
find the slope of the tangent line at the point P(1,1) on the graph of e^x-y=2x^2-y^2
January 17, 2012

calculus
An airplane flying west at 300 miles per hour goes over the control tower at noon, and a second airplane at the same altitude, flying north at 400 miles per hour, goes over the tower an hour later. How fast is the distance between the airplanes changing at 2:00 P.M.?
January 17, 2012

Algebra
REMOVING FACTOR OF 1: 4Z-24/6-Z
December 17, 2011

Algebra
The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: C=6350/(425-3x) . What is the cost to remove 75% of the pollution? Hint: Plug in and calculate, do not convert to a decimal. Can someone tell me how figure this out step by step recheck my ...
December 15, 2011

Algebra
1.50 per animal. 2200.00 for set-up and 1,50 per animal ??? are you sure your right???
December 14, 2011

Algebra
Opps I think the other one was wrong so here's my new answer: (2200 + 1.5x)=1.5*25+$2,200 =$2,237.50
December 14, 2011

Algebra
Scientists want to set up and test animals in the area for West Nile. The costs to test are $2,200 for setup plus $1.50 to administer each test. (2200 + 1.5x)/x What is the average cost to test 25 animals?250 animals??1000 animals??? (2200 + 1.5x)=2201.50 *25 =2239.00 Is this ...
December 14, 2011

Algebra
, what value of x would make the equation undefined? Hint: Think about what makes an equation undefined. Then calculate what value would make this equation undefined. Any ideas????? help
December 14, 2011

Algebra
The cost, in millions, to remove x% of pollution in a pond is modeled by the equation: C=6350/(425-3x) What is the cost to remove 75% of the pollution? Plug in and calculate, do not convert to a decimal.
December 14, 2011

Algebra
HELP!!!!!!!If 59 people use 15,045 cans in 1 year. How maNY CANS are used in a city with a population of 1,562,000???
December 13, 2011

chemistry
2H2 (g) O2 (g) --> 2H2O (g) if 44 g of O2 are reacted , determine the amount if heat transferred in the reaction when the Heat = -483.6 kJ
December 12, 2011

chemistry
2H2 (g) O2 (g) --> 2H2O (g) if 44 g of O2 are reacted , determine the amount if heat transferred in the reaction when the Heat = -483.6 kJ
December 12, 2011

physiology
Pepsin would have the greatest activity... a.)when the pH of the chyme is greater than 3. b.)immediately upon entering the duodenum. c.)immediately upon secretion into the stomach. d.)when the pH of the chyme is less than 3.
December 10, 2011

physiology
True or False The secretion of GnRH, FSH, and LH are pulsatile instead of continuous?
December 4, 2011

physics
A propeller spins at 1850 rev/min. (a) What is the angular velocity in rad/s? (b) What is the angular displacement of the propeller in 4.10 s?
November 28, 2011

chemistry
i have this exact same problem and i cannot figure out the answer. can you please help?
October 3, 2011

chemistry
did u get the answer?
October 3, 2011

math
sig figs for.. 1.399 x by 10-3 0.0763 m2 212.080 g 673.133 K 6.69808e+06 cm
October 2, 2011

Academic and Professional Success
Email a teacher, or tell your partner how you feel. Kindly, just give them advice on what to improve on in their portion. If that doesn't work, talk to a teacher and tell them that you feel your partner's work is insufficient, and that you want and feel you deserve an...
September 30, 2011

Physics
At 1:00 p.m. a car, traveling at a constant velocity of 96 km/h toward the west, is 24 km to the west of our school. How far from the school will it be at 3:30 p.m.? Answer in units of km. I've been attempting this problem for at least 30 minutes and not getting the right ...
September 30, 2011

Science
The problem I'm trying to answer is: Ann is driving down a street at 59 km/h. Suddenly a child runs into the street. If it takes Ann 0.719 s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m. I know the first ...
September 30, 2011

calculus
Find the volume of the solid obtained by rotating the region under the graph f(x) = x2 - 3x about the x-axis over the interval [0, 3].
September 25, 2011

Art
What elements of painting are important to Renaissance artists?
September 17, 2011

Art History
How does Perugino's work represent the ideas of Humanism and the Renaissance?
September 17, 2011

chemistry
If a swimmer has a lung volume of 6 at sea level, what would the volume of her lungs be when she is at the bottom of a pool that is 5 deep? Assume that the temperature and amount of the air in the lungs remain unchanged.
September 2, 2011

math
16 divided by 2[8-3(4-2)] +1
June 27, 2011

Chemistry
where in the atom would you put a region of fixed small volume if you wished to maximize the chance o finding the electron inside the volume?
April 24, 2011

English
It's all right, the way I changed the paragraph nullified the use of a semi-colon anyways :) Thanks!
April 19, 2011

English
Is this a correct use of a semi-colen?: "However Petra was taken over in 100 CE by the Romans, and was still occupied during the Byzantine period; but it soon became not as much of an importance after that, besides being used as a fort for the Crusaders in the 12th ...
April 19, 2011

English
Thanks!
April 10, 2011

English
What does the word "curfew" mean in this sentence: "A game well played, but curfew is past!"
April 10, 2011

Physics rollerblading question
1) Suzie (of mass 38 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 seconds. What is Suzie’s average acceleration? Answer in units of ...
March 25, 2011

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