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March 24, 2017

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Posts by Michelle

Total # Posts: 1,962

Math
Golds gym charges $150 to sign up and $10 per month. Fitness express charges not initial fee but charges $25 per month. When will the cost be the same? Show work please!!
October 27, 2015

ap chem
if 3.2 kcal of heat is added to 1kg of ice at 0 celcius, how much ice is produced and how much ice is left?
October 21, 2015

Intermediate Algebra for College
Imagine that you are looking to rent a car that costs $15 a day, and you will be charged an additional 25 cents for every mile you drive it during the day. The following formula can be used to calculate the cost for driving the car for a day: C = 0.25m + 15 If you were to ...
October 15, 2015

math
Find the absolute maximum and the absolute minimum value, if any of: f(x)= (-1x^2/8)+4x+3 on the interval (0,9)
October 12, 2015

Math
Find the absolute maximum and the absolute minimum value, if any of: f(x)= -1x^2/8+4x+3 on the interval (0,9)
October 12, 2015

Calculus
The altitude attained by a model rocket t seconds into flight is given by the equation: -t^3+3t^2+20t-3 where t is greater than or equal to 0 seconds. find the maximum altitude attained by the rocket. first I found the derivative of the original equation and set it to 0. which...
October 12, 2015

chemistry
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.73 nm. It then gives off a photon having a wavelength of 1094 nm. What is the final state of the hydrogen atom?
October 11, 2015

Stats
About 10% of the population of a large country is math phobic. If two people are randomly selected what is the probability both are math phobic? And hat is the probability that at least one is math phobic? Any way to do this on stat crunch?
October 11, 2015

Math
Monica Collects quarters, dimes, nickels and pennies. This afternoon she took $ 1.00 from her collection. She counted the coins and found that she had twice as many nickels as dimes. What coins could Monica have?
October 1, 2015

Social Studies
Idk jelp
October 1, 2015

Social Studies
Name three factors factors that combine to make the eastern usa a industrial region
October 1, 2015

Math
Survey the population or use a sample,you want to know the type of computer, if any, that each student in your class has at home?
September 28, 2015

math
35/65 in simplest form
September 25, 2015

Physics
If the rate of continental drift were to abruptly slow from 1.0 cm/y to 0.5 cm/y over the time interval of a year, what would be the average acceleration?
September 15, 2015

math
how can you find what each mark represents on a number line?
September 13, 2015

fundamentals of math
there are 40 bikes inspected. If 15 need new tires and 26 need gear repairs. -what is the greatest number of bikes that could have needed both repairs? -The least number that could have needed both? -Greatest number that could have needed neither repair?
September 5, 2015

Art
The society that a rises from a concern regarded as excellent in art .
August 31, 2015

Physical Chemistry
If 5.00 mL of 3% H2O2 is decomposed, how many mL of gas will be produced at 1.01 bar and 25C?
August 31, 2015

Determining whether expired air contains carbon dioxide
1.Formulate a hypothesis for this investigation 2.State the aim of this investigation 3. a)Independent variable b)Dependent variable c)Controlled variable 4.State methods and the control
August 23, 2015

physics
A car travels at a constant speed of 30 mph for 20 miles, at a speed of 40 fps for the next 20 miles, and then travels the final 20 miles at 90 kph. what is the average speed of the entire trip?
August 23, 2015

Math
The supplement of an angle measures 11 times its complement. Then the measure of the angle is... A. 9 degrees B. 81 degrees C. 90 degrees D. 99 degrees E. 100 degrees
August 3, 2015

Math
Thanks
August 3, 2015

Math
jack and jerry can complete a job together in 4 hours. if jack require 6 hours to do the job alone, how many hours will it take jerry to do the job alone. A.12 B.10 C.8 D.6 E.4
August 3, 2015

chemistry
The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 24.6 g of the compound? Please guide me through it thank you!
July 28, 2015

AP Chemistry
The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 24.6 g of the compound?
July 28, 2015

Math
Thanks
July 10, 2015

Math
Ralph's age is currently 3 years more than twice joe's age. But 3 years ago, ralph was was 4 times as old as Joe was the . How old will joe be in 10 years?
July 10, 2015

Organic Chemistry
Dr. Bob, Thank you for the chart; its really helps. Just to make sure I am on the same page as you. I look up the bonds listed. F-I has the highest deltaHf (kj/mol). So that means that is takes more energy to break that bond; thus have the strong bond?
June 22, 2015

Organic Chemistry
1. Which of the following bonds is the strongest? a. F-F b. F-Cl c. F-Br d. F-I I think it's A because of the same atomic radius. Is that correct? Am I on the right track?
June 22, 2015

geometry
An artist wants to make alabaster pyramids using a block of alabaster with a volume of 576 cubic inches. She plans to make each pyramid with a square base area of 3 square inches and a height of 4 inches. At most, how many pyramids can the artist make from the block of ...
June 19, 2015

Chemisrty
Calculate the grams of substance from the moles of substance given.... 2 moles C6H10O5. Please help I am lost!
June 17, 2015

Organic Chemistry
Which isomer of 1-ethyl-3-methylcyclohexane is more stable, cis or trans? My teacher hasn't covered this material as of yet, but we have a test done tomorrow on it. What is a cis and trans? Not sure how to begin figuring this out. My text book isn't helpful. Thanks
June 15, 2015

Organic Chemistry
Thank you Dr.Bob. For some reason my textbook doesn't have any answers to the selected problems so I don't know if I on the right track. I really appreciate your help.
June 14, 2015

Organic Chemistry
What is the hybridization of all the atoms (other than hydrogen) in each of the following species? a) NH3 e) +NH4 i) H3O+ b) BH3 f) +CH3 j)H2C=O c) -CH3 g) HCN d)*CH3 h) C(CH3)4 There are a couple I don't know how to do. Please help? Did I do the other correctly? Thanks. a...
June 14, 2015

Organic Chemistry
Is eutectic point and eutectic mixture the same thing? If not what is the difference between the two? Thanks in advance.
June 11, 2015

us gov
what single word means the same thing as representative democracy
June 10, 2015

Chemistry
analyze and describe the different types of genetic mutations and their effects
June 8, 2015

Math
Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is the change that Tim and...
May 28, 2015

Math
Thanks!
May 21, 2015

Math
Thanks!
May 21, 2015

Math
Q. Neil found out that the Sunday paper that he delivers is about 1 pound and 12 ounces. He delivers 39 newspapers on Sunday's. How much do the 39 newspapers weigh? (Hint: 16 ounces = 1 pound) A. I tried adding 16 12 times but that didn't work after I found out it was ...
May 21, 2015

Math
4:31
May 19, 2015

Math
Q. Juan delivers papers every morning before he goes to school. He has to have all the papers delivered by 6:30 am. He has 86 papers and he figures it takes him an average of one and one half minutes to deliver each paper. At what time must he start in order to be done as ...
May 19, 2015

Chemistry
A 10.0mL sample of H2SO4 was neutralized by 13.5mL of 1.0M KOH. What was its molarity of H2SO4? What is the normality?
May 18, 2015

Math
Thank you
May 14, 2015

Math
292-223=69
May 14, 2015

Math
Q. Mrs.Ramirez's class was getting ready to plant tomatoes. They we're wondering if each package of tomato seeds contained the same number of seeds. They counted the seeds in four packages and found that there was a average of 73 seeds in the package. The first three ...
May 14, 2015

Townview
Elaine is painting a fence. She knows that she needs 1 gallon of paint for each 10 feet of fencing. The fencing will enclose a rectangular yard that is 3 yards long and 2 yards wide. How much paint does Elaine need? (Remember 3 feet = 1 yard)
May 14, 2015

Chemisty
Dr. Bob, Where are you getting the 0.693 from?
May 14, 2015

Chemisty
The activity of a radioisotope is 3000 counts per minute at one time and 2736 counts per minute 48 hours later. What is the half-life of the radioisotope?? a) 831hr b)521hr c)361 hr d)1.44hr
May 14, 2015

Math
Q. Mr. Kincaid's class wants to plant 1/4 (fraction) of its 12-foot-square plot with tomatoes. Of the remaining garden, 1/3 will be pears. Of the rest of the plot,1/2 will be radishes, and 1/2 will be lettuce. How many square feet of radishes will the class plant.?
May 13, 2015

Bio 20
Hydrogen sulfide gas is combusted with oxygen gas to produce sulfur dioxide gas and water vapour. If there is 19.3 L of oxygen gas, what maximum volume of hydrogen sulfide gas could be combusted?
May 11, 2015

Chemistry 20
Hydrogen cyanide gas is produced industrially by the reaction 2 CH4(g) + 3 O2(g) + 2 NH3(g) → 2 HCN(g) + 6 H2O(g) What volume of O2(g) is needed to completely react 17 L of CH4(g) at STP?
May 11, 2015

Math
its D 4 is D GAWH
May 8, 2015

Chemisty
What is the molar solubility of AgCl, Ksp= 1.60x^-10, in a solution that also contains 0.0250 M KCl? The answer is 1.60x^-10. But I am not sure why this is. Does it have to do with the solubility rules? Please Help.
May 7, 2015

Medical science
Dimethyl ether = predominate weak dipole-dipole intermolecular force. (positively charged hydrogen atoms and the negatively charged oxygen atoms). H+ H+ H+- C- O - C - H+ H+ H+ Ethanol = hydrogen bonding (Hydrogen bonding to oxygen) H+ H+ H+ - C - C - O - H+ H+ H+ Hydrogen ...
April 29, 2015

Medical science
Dimethyl ether = predominate weak dipole-dipole intermolecular force. (positively charged hydrogen atoms and the negatively charged oxygen atoms). Ethanol = hydrogen bonding (Hydrogen bonding to oxygen) Hydrogen bonds have higher boiling points
April 29, 2015

Math
EX: I took the answers from Amy and got a 5 out a 8 meaning I got 3 questions wrong (doesn't matter any way, I get good grades. I can bring that up to a A ( without Jiskha)
April 24, 2015

Math
Look at the question, Look what the person is saying what number 7 is or 8 honestly, I though y'all would think about that
April 24, 2015

Math
Some questions are mixed up so someone can be like " the Answer are A, D, B, C, and someone can just take them without looking. What im trying to say is someone quick check can be A, D, B, C, When someone else is A, B, D, A, That way you HAVE to look first
April 24, 2015

chem
a solution is prepared with 3.26g kcl and water to make 25.0ml,of kcl,what is the %(m/V) of the kcl solution.
April 22, 2015

Molarity question
ahh thank you!
April 18, 2015

Molarity question
okay so in lab we made up 2 solutions of FeCl3 and KI. We varied the volumes...I was just wondering how to calculate a new concentration for those solutions. We weighed out .825g of the FeCl3 and 1.35 g of the KI. For trial one we used 20 mL of both. For trial 2 we used 20.0 ...
April 18, 2015

Chemistry: Potentiometric Anyalysis
Ok. Thank you. That is what I was thinking. I really appreciate your help.
April 14, 2015

Chemistry: Potentiometric Anyalysis
I am still working on a handful of the calculations.
April 14, 2015

Chemistry: Potentiometric Anyalysis
DrBob222, In the lab we used a NaOH solution with a 0.1088M to calculate the equivalence point of a unknown weak acid using "Logger Pro" program. I used 0.4530g of the unknown acid and dissolved it in 75ml of distilled water. For my 3 three trials, I gather enough ...
April 14, 2015

Chemistry: Potentiometric Anyalysis
If the pH probe was miscalibrated and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher, lower, or equal to the true molar mass of the acid? This for my post lab write up. I think that the...
April 14, 2015

Math
Perform the calculations 6 ft, 5 in,-2 ft, 7 in = what in ft, and inches Thanks
April 14, 2015

Math
Perform the following calculations 7 yds , 1ft -3 yds, 2 ft= what in ft Thanks
April 14, 2015

L.A
1.B 2.A 3.D 4.C
April 14, 2015

Math
A plane has a height of 1000 m. You see the plane at an angle of 40 degrees with the ground . How far away is the plane from where you are standing.
April 12, 2015

Math
A wall has dimensions 25 m by 10 m represent the wall with a drawing if the scale is 1 cm represents 5 m
April 12, 2015

statistics
would it be B
April 10, 2015

LA plz help ms.sue
DAB
April 9, 2015

Chemistry
0.688g of antacid was treated with 50.00ml of 0.200M HCl. The excess acid required 4.21 mL of 1.200 M NaOH for back-titration. What is the neutralizing power of this antacid expressed as mmol of HCl per gram of antacid? I think the answer should be: (50.00ml HCl)(0.200M HCl)= ...
April 6, 2015

physics
A car speeds up uniformly from rest so that it has a velocity of 30ms -1 after 20 second.How far does the car travel in first 10 seconds?
April 6, 2015

physics
A car speeds up uniformly from rest so that it has velocity of 30 ms-1 after 20 seconds. Question/ How far does the car travel in first 10 seconds?
April 6, 2015

physics
A car speeds up uniformly from rest so that it has a velocity of 30 ms-1 after 20 second. How far does the car travel in first 10 second?
April 6, 2015

Chemistry
The bubble in the tip of the buret is not removed prior to performing the NaOH standardization. Will the reported concentration of the NaOH be greater than, less than, or equal to the true concentration of the NaOH if the bubble is flushed from the buret during the titration? ...
April 4, 2015

Chemistry
am I doing this equation correctly, please help. K3PO4(aq) + Ba(NO3)2(aq) my answer: 3K(NO3)2(aq) + 2Ba(PO4)3(s) Double displacement precipitation
April 4, 2015

Chemistry
Why can't milk of magnesia (Mg(OH)2), act as a buffer?
April 2, 2015

Chemistry
A jar contains 75mL of a .45M silver nitrate solution. Will 200g of solid copper be enough to bring all the silver out of solution as a solid?
March 30, 2015

Chemistry
Thank you Dr. Bob222
March 30, 2015

Chemistry
Given that Ka for HIO is 3.2 × 10-11 at 25 °C, what is the value of Kb for IO– at 25 °C? Then, Given that Kb for C6H5NH2 is 1.7 × 10-9 at 25 °C, what is the value of Ka for C6H5NH3 at 25 °C? I don't know where to start? Do I need an ICE ...
March 30, 2015

Physical Science
A man loads 1,000 sacks of flour into a truck in 30 minutes. each sack has a mass of 20 kg and the man must lift each sack 1.00 m from a cart up onto the truck bed. How much power did the man develop?
March 30, 2015

Physics
A motorist is trying to loosen a stubborn lugnut by standing on the end of a wrench. The wrench is inclined 33.8 degrees above the horizontal and the distance from the center of the nut to the end of the wrench is 0.60 m. Assuming the motorist does not bounce up and down on ...
March 29, 2015

Chemistry
Great! Thank you. This helps a lot!
March 27, 2015

Chemistry
A buret is partially filled with NaOH solution, to a volume of 1.14mL. A 20-mL sample of 0.1011 M HCl is titrated to a faint pink phenolphthalein endpoint. The final buret buret reading is 22.37mL. What is the molarity of the NaOH solution? Please help. Thank you in advance.
March 27, 2015

Math/Science
How do you convert millimeters to micrometers? For 10 mm, I got .010 micrometers, but I'm not sure if that's right.
March 25, 2015

algebra
what is the square root of 144?
March 23, 2015

Math check
GG bro i got 5/5 thanx cake and chris
March 21, 2015

English
Is the foghorn an archetype then ? I'm just really lost in this whole poem. Because archetypes are suppressed in the unconscious, so they talk about something they never intended is that what is meant ?
March 19, 2015

English
That is the idea that was proposed...I just don't understand the poem and its context in order to apply Jung's theory.
March 19, 2015

English
There is a deeper meaning to the poem and I am supposed to analyze the poem using Jung's theory of the psyche !
March 19, 2015

English
I need help with the following poem analysis, I do not know what it is saying! FOGHORN Surely that moan is not the thing That men thought they were making, when they Put it there, for their own necessities That throat does not call to anything human But to something men had ...
March 19, 2015

math
An arc AB of length 5cm is marked an a circle of radius 3cm. Find the area of the sector bounded by this arc and the radii from A and B.
March 15, 2015

math
A cord AB of length 4cm divides a circle of radius 3.3cm into two segments.find the area of each segment.
March 15, 2015

math
which pizza has the best value for the money; a 10 inch round pie for $6 or a 14 inch pie for $10? Support your answer.
March 14, 2015

English-Please Help
OMG TY ANSWER
March 13, 2015

math
6/(v-5)(v+2) if the rational expression is defined for all real numbers
March 9, 2015

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