Wednesday
July 30, 2014

Posts by Davis


Total # Posts: 94

math
A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?

government
3rd amendment?

math
a movng company wants to buy a new type of truck and needs to know the volume of the storage compartent before they can decide if they should purchase the truck. What is the volume of the storage compartment? 10ft, 18ft, 8ft, 2ft, 15ft.

Physics
A spring with a spring constant k=450.0 N/m is attached to a mass of m=8 kg and stretched -0.5 m from its equilibrium position and released. What is the speed of the block when it is at the equilibrium position?

math
help! what ia 1/4(sin4x)? just to jump start this proof

AP Chemistry--to DrBob
Thanks Dr. Bob!

AP Chemistry--to DrBob
How do I figure out the Pka value?

AP Chemistry
DrBob--How do I determine the Pka value?

AP Chemistry
Calculate the pH of a 75.0 ml solution containing 0.85 M lactic acid after the addition of 0.0225 moles NaL (assume a negligible volume change.)

Chem!!!:/
Calculate the ratio of NaF to HF required to creAte a buffer with pH=4.00.

Chemistry
Your answer is correct.

PRECALCULUS
solve: tantheta = sintheta

psychology
1.Who came up with the psychosexual stages? *Sigmund Freud Skinner Gardner Lada Gaga 2.Which psychologist tested classical conditioning with dogs? B. F. Skinner *Ivan Pavlov Igor Pavlov Sigmund Freud 3. Explain the difference between operant conditioning and classical conditi...

physics
what is nature of a graph of period against angle

Chemistry
Samples of three different compounds were analyzed and the masses of each element were determined. Compound Mass Mass N(g) O(g) A 5.6 3.2 B 3.5 8.0 C 1.4 4.0 If you were John Dalton and had never heard of a mole, which of the following would you think were possible sets of for...

SCIENCE!!!!!!!!!!!!!!111111
A unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

chemistry
Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add the moles of both samp...

science
1meter=1X10^-9 nanometers 1meter=1X10^-6 micrometers 1meter=1X10^-10 Angstrom 1meter=1X10^6 MegaMeter

math
third one is true

Algebra
As time passes, the ticket sales get higher. Each time you plug in different values of X, the day tickets go on sale, your Y value increases.

Algebra
For D)..... Your parabola should be negative because of the -2X^2. SO the parabola when you graph it is a backwards U. The middle of the backwards "U" has a high maximum so your tickets should be at a peak during the middle of the sale.

algebra
I believe you get .0030864. solve what's in the parenthesis first then ^2. turn fractions into decimal format then add them and ^2.

Trig
Find the angle of the measure formed by the clock. 2:15

basic chem
1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?

Chem
oh okay i get it now, thank you! Why did you subtract 1.00 from the abundance though? how do you know?

Chem
(79.904)=(80.9163)(0.4931) + x(0.4931) 79.904=39.90 + 0.4931x 40.004=0.4931x x=81.13amu

Chem
My teacher said the answer is 78.92 amu and 50.69%. But i keep getting 81.13amu and i don't know how to get the percentage.

Chem
Bromine has two natural occurring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. The mass of Br-81 is 80.9163 amu, and its natural abundance is 49.31%. Calculate the mass and natural abundance of Br-79.

algebra
Oh and then you put your equation in slope intercept form y=mx+b. and get -7y=-6x-42 and divide by 7. so your line will be y=6/7x +6.

algebra
you plug in zero for x and get 6(0)-7y=-42 and then you get-7y=-42 which is y=6. and then you plug in zero for y and get 6x-7(0)=-42 and then you get 6x=-42 which is x=-7. so your points are (-7,6) and then graph them.

trig
5sin^2 270degrees -3cos180degrees-tan(-180degrees) i got -2 but I'm not sure if i did it right?

math
That's not possible. But 10^-1 is. You move your decimal to the left for negative exponents and you move your decimal to the right for positive exponents. If you had a value of 1 X 10^-2 for example you would move your decimal two places to the left which would equal .01 i...

trig
oh okay! I get it now, thanks!:)

trig
How do you know by looking at them?

trig
Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)

Chemistry
You would use gay-lussac's law. P1/P1 = P2/P2 SO you plug your values in and get... (660 torr)/(20celsius) = (? torr)/(40celsius) .... (26400 torr/celsius) = (20celsius)(? torr) then divide by 20 degrees celsius and then you get 1320 torr as your answer.

Chemistry
THE VOLUME WOULDN'T HAVE ANY EFFECT ON THE TEMPERATURE. FOR A GAS IN A CLOSED CONTAINER, WITH THE PRESSURE CONSTANT THE TEMPERATURE DOESN'T CHANGE THE VOLUME. WHEN TEMPERATURE INCREASES, PRESSURE INCREASES. THEY ARE DIRECTLY PROPORTIONAL.

trig
Use the appropriate identity to find tan(theta) given that cot theta =0.05.

trig
Use trigonometric identities to find sec theta, given that tan theta = Radical 5/ 3.

trig
Suppose that 0degrees<theta<180degrees. what is the sign of each of the following? a) cos theta/2 b)sin(-theta)

Physical Science
addition&subtraction= round to least number of decimal places multiplication&division=round to least number of significant figures present.

science
use conversion factor. 3.5in X 1cm _____ = 1.4 cm 2.54 in. round to two significant figures. answer is= 1.4cm

english
Which of the following sentences contains an error? A) The student's attitude did not help her succeed. B) How many students are you planning to hire? C) Student's need to work hard if they want to receive good grades. D) Students' votes are important in determinin...

english
John gave Samuel his hockey stick. In this sentence, Samuel is the ____.

english
What is the compound subject of the following? Tamara and Janet served soup and salad at the luncheon.

english
Which of the following pronouns shows possession? they - them - her - its

english
What is the subject of the following sentence? Please help me figure this out! a. Please b. help c. me d. You (implied)

english
Identify the indirect object in the following sentence: Fernando read Miguel a bedtime story.

math
(-4)(5)=

math
-2-6

math
2+3x+4 input x=3 and output y=6

math
Can some one please help me I had developed jello brain today. Can some one explain to me why the line x = - 2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = -2 . what would the slope be for y = -2. Please I am sinking here.

math
I need to see if i worked this problem right. -8 - -7 =-15 -8+-7=-15 do i add this together aredo i subtract and get -1

math
Can any one help me with this problem am having trouble with coming up with the answer. 7-(-1)/3(2)-9/(-3)

math
can I trouble any one with this que stion. I got jello brain right now. 7-(-1)/3(2)-9/(-3)

math
(-8)2 – 8(2 )= I need help with this problem i have wrecked my brain and havnt came up with the answer

math
The ã61 (square root of 61) is between what two whole numbers?I am a little bit losed when coming up with the answer can I trouble you for some help.

math
I am having problems coming up with the answer to this problem. Could you kindly help me. It took Amanda 3 hours and 20 minutes to drive from her home to a friend’s house. She then drove to the beach which took her 4 hours and 25 minutes. It only took Amanda 5 hours and 3...

math
find the median and mean of this numbers 95,75,86,96,70,68,76,81,95,76,69,83,93,88,94 Is the median 83and the mean 83 if i arrange the numbers in ascending order

math
- 2.3 – (- 8.9) does it equal -6.6 or x= 2/3=4/6=6/9 x=8/9-6/9=2/9

math
11. Place the following set of numbers in ascending order. 20, –7, 5, –5, 12, 4, 15

math
Find the five-number summary of the following set of numbers: 349, 243, 119, 363, 246, 505, 263, 221, 324

math
Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61

math
4-(-3)+1/2-2/(-2)

math
16?(-2)+(-4)/2^3+4 How would i work out this problem to get to the soultion

math
(-9)(5)/-3

math
(-6)^2-4^2 How wouLD I WORK THIS PROBLEM OUT

math
-1/2-(-5/8)

math
-3.4-(-7.6)

math
(-6)2 (-4)2

math
soltion for -3( -6)+(4)(-2)

math
-9--4

math
3/7-6/7,1/7,-1/2,2/7

math
1/3+(-5/6)+-1/2=

math
What is the population of Europe in 2000? (b) What is the total area of Europe?

math
how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful

math
How would you use the concepts from Chapter 8 in a real-life situation?

math
Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

math
. Which pair of fractions is proportional?0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4 or 0.8/0.4=3.2/2.4 or 0.8/0.4=4/2.4

math
Carol has 22% of her pay withheld for deductions. If she earns $680 per week, what amount is withheld?

Chemistry II
Answer in Minutes = 63 minutes. Thanks

Chemistry II
Spec heat of ice: 2.09 j/(g*deg C) Spec heat of liq water: 4.18J/(g*deg C) Enthalpy of fusion: 334 J/g Enthalpy of vaporization: 2250 J/g

Chemistry II
How long would it take for 1.50mols of water at 100.0deg C to be converted completely into steam if heat were added at a constant rate of 16.0j/s

HCA/220
◦Scenario 3: You have just started your career as a physical therapist and have been assigned to a mentor. Begin a discussion with your mentor that mentions specifically how you have helped your patients improve their mobility and aided in their recoveries.

HCA/220
Scenario 1: You are attending a wellness conference and one of the exhibitors is a chiropractor in your local area. You are unfamiliar with chiropractic care and want to learn more. Since you are at the conference, the doctor assumes that you have knowledge of medical terminol...

HCA/220
◦Scenario 2: You are an allied health professional working with an orthopedist. You have been working with the patient and need to update the doctor on the reason for the patient’s visit. Begin describing the patient’s concerns. Your classmates may continue wi...

IT/Proj Mgmt
Innovative Systems is ready to get started using the PMI standard. BPP is advising IS on a new project bid. The project involves setting up an automated tracking system for a library. Radio frequency (RF) tags would be attached to each book, and a networked computer database a...

College Algebra
If a and b are in parenthesis, the answer is: c = d*e^(n/(a+b)) If not, the answer is: c = d*e^((n/b)-(a/b))

math
Find the median of the following set of numbers. 45, 21, 55, 22, 65, 61

math
there are 4 cows and 8 ducks

PSY HELP!!! Please
Here are the statements OPPSS.... The healthy personality is found in balancing the social self with the individual self Popular theorists include Freud, Jung, and Erikson Consists of five major personality factors which are reasonably stable elements of personality. These fac...

PSY HELP!!! Please
Match the psychological theories with the appropriate statement(s): Psychodynamic Theory Trait Theory Learning Theory Sociocultural Humanistic Theory Popular theorist Eysenck initiated the five-factor model. The healthy personality is found in balancing the social self with th...

psychology
Stress scenario 1: Every morning, as she prepares for her two-hour drive to work, Carole gets a headache. Carole is experiencing the frustrations of commuting. From the information provided, it does not appear that Carole is actively coping with her stress. Carole could choose...

chemistry
How many grams of NaCl should be added to 250 grams of water to make a 0.40 m solution? I got 19 grams. this is how I got it. first I found the mass of water = 18g then I converted that to mols 18/250 = .0072. I subtracted 0.072 - 0.40 = 0.328 I found the mass of NaCl = 58 0.3...

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