Tuesday
July 22, 2014

Posts by Gregory


Total # Posts: 76

Algebra - Functions
Find the domain: a) [sqrt(x+3)]+[5x^2-180] b) [sqrt(x+3)]/[5x^2-180] c) (8x+9)(9x+8) d) (8x+9)/(9x+8) e) [sqrt(x+2)](5x^2-245) f) [sqrt(x+2)]/(5x^2-245)

Chemistry
6. Explain how you would prepare this solution from powdered reagents and whatever glassware you needed: 3.0 L of 1.3 M NaOH

American Govt
Is efficiency the best standard for evaluating bureaucratic performance, or are there other important criteria by which to assess what the federal government does?

American Govt
Why does the bureaucracy continue to expand?

American Govt
How much control does the public, through its elected representatives in Congress, exercise over the bureaucracy?

American Govt
What expectations does the American public have of the federal government?

literature
Jefferson approved of the arrangement of the federal government into

physics
A Ferris wheel rotates at an angular velocity of 0.28 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.021 rad/s2. How long does it take the wheel to come up to operating speed?

physics
A pitcher throws a curveball that reaches the catcher in 0.67 s. The ball curves because it is spinning at an average angular velocity of 340 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in radians) as it tr...

World History
Why did Columbus fail as an administrator on land but excel as a ship captain?

World History
How did the Samurai become such a powerful force in Japan.

World History
Describe the lost libraries of Timbuktu.

World History
To say crusade in arabic means something awful compared to saying crusade in English, which means symply "an adventure or mission possibly of a religious manner

World History
How were the Byzantine's Engineering geniuses? Take two or three of their engineering feats and discuss how these marvels led to the empire's overall success.

World History
Why did Muhammad find the religion of Islam. How and why was the religion able to spread so rapidly?

Chemistry
Thank you so much once again Dr. Bob!

Chemistry
At least with part b. I figured out that part a is Pb(NO3)2

Chemistry
Well, what a coincidence. Hello Stephon! My uncle's name is Stephon, but he lives across the country from me. Anyways, can someone please help me with this problem?

Chemistry
Solid Na2SO4 is added to a solution which is 0.012 M in Pb(NO3)2 and 0.048 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4. (a) Which compound precipitates first? (b) What is the concentration of the first ion precipitated...

Chemistry
Thank you! I got this one right.

Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+] is required so that ...

Chemistry
This revision was correct. Thank you so much for helping, I actually understand how to solve the problem now.

Chemistry
Pardon me, I meant -2(1.972) for NaOH and + 2(1.972) for NaCl

Chemistry
I think I see the problem. For the first ICE box, shouldn't C for NaOH and NaCl be + 2*(1.972)?

Chemistry
I keep getting 1.0e-10 for x. I even tried 1.03e-10. The answer is incorrect. I checked your work, and everything was calculated correctly, I'm not sure what went wrong.

Chemistry
If 11.6 mL of 0.17 M MgCl2 are mixed with 24.9 mL of 0.58 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 10-11 for Mg(OH)2

World History
What caused the destruction of Angkor Wat.

World History
Why did Julius Caesar lose power?

World History
What did Julius Caesar do after taking over Rome?

World History
How did Julius Caesar gain power.

World History
Consider the meaning of bloodletting and human sacrifice to the Mesoamericans How do these practices make sense in the context of their belief systems?

World History
What were Alexander's lasting contributions to society?

World History
Why did the Persians who seemed more powerful lose to Alexander?

World History
Please read Chapter 2 in the textbook The First Complex Societies in the Eastern Mediterranean, ca. 4000-550 B.C.E. (pp. 22-43) and answer the following questions: 1. The Hittites were considered to have military superiority at the time, and they were a major challenge to othe...

World History
Ancient Egypt has long captured the imaginations of ordinary people, not just historians. There seems to be a fascination with Egypt even more than other ancient cultures. Briefly discuss why you think that Egypt has continued to intrigue people.

World History
What difficulties did early humans face in migrating to Australia and the Americas and what are the theories about how they overcame those difficulties?

Algebra II (Exponents)
Simplify: (8x^ y^27)^1/3

Algebra II (Geometric Series)
What is the sum of the following geometric series: 1+1/4+1/16

Math
Please ignore this question. I was a able to get it. Thanks For Reading!

Math
Need help understanding half-life/decay problem for upcoming test. A water filter is constructed to form a foam that removes 25% of the particulate impurities for each inch of foam. 1.What percentage of the particulate impurities will be removed by a filter consisting of two i...

science
an areroplane flies to the destination 600km west of its starting point. A wind is blowing from the North-west at 75 m/s. The pilot wants to complete the flight in 55 minutes. Calculate the direction to be taken by the pilot.

Trig/Math
RST is a triangle with right angle S. If s- 21.3 Angstroms and t=8.71 Angstroms, find the measure of the larger acute angle.

arithmetic
In a survey of 300 students,96 of them said that math is their favorite subject.

construction
well you are trying to fill inside of a rectangle with water so unless you already tried this I would find the volume of the pool(120x45x10)which gives us 54000. Then you would divide the volume of the pool by the rate at which it is filled so 54000/15(gal. per min.)= 3600. Th...

Geometery
I am ask to write a two column proof. Given that AD is the diameter of circle O, and DC is tangent to O at D. Prove that Triangle ABD ~ (congruent) to triangle ADC

College Bio
Imagine you are conducting fieldwork and discover two groups of mice living on opposite sides of the river. Assuming that you will not disturb the mice, design a study to determine whether these two groups belong to the same species. If you could capture some of the mice and b...

Tangu
how long does it takes for 1000 pounds to melt in 12 feet of snow at 39 degrees

Chemistry
What is the maximum amount of sodium chloride that will dissolve in 250 mL of water at zero degrees celsius?

statistics
A population of N=8 scores has a mean of M =20. If one score is changed from X=14to X=30 , what would be the value for the new mean.

algebra
square roots 12a^3/25 equal what it radical and rational exponent

math
Yes you are right it do not have a parentesis it has square root.

math
square root of x+4-2square x-1=-1 could help me please.

college algebra
Radical and Rational Exponent find roots square roots of 12a^3/25 check this for me it find the roots of the problem

college alegbra
3/t-3=5/t+4 3(t+4)(t-3)(5) check this problem

college algebra
in the problem there are no brackets x over x minus x/over x-4 equal -4 over x-4 solve each rational equation if it has no equation state so. simply with necessary Please help me

college algebra
x/2-x/x-4=-4/x-4=-4x^2/2 check this please

algebra
x^2+x/x^2-6x+8/x^2+3x+2/2x^2-7x+6 can some help me please...

algebra
x^2-4/x^2+3x+2 4x^2-y^2/y-2x I need help with these problem

physics help
Part one is asking for the speed of the pulse. The equation for speed is v = d/t (or v = s/t depending on your textbook. Velocity = Distance/Time. Since the pulse is traveling from the terminal to the other side, and back to origin, you must take double the distance of the rop...

life orientation
By havin ubuntu here at sa

Finance
If sales grew 20% from 10,000,000 to 12,000,000 and the discresinary financing needs is 500,000. What percent of sales grown would be needed to equal a DFN of zero.

math
4,000,000-[(300,000)+x] = 147,000

8th Grade Math
Name the ordered pair if the x-intercept is -2.

statistics
Payne (2001) gave participants a computerized task in which they first see a face and then a picture of either a gun or a tool. The task was to press one button if it was a tool and a different one if it was a gun. Unknown to the participants while they were doing the study, t...

statistics
A psychologist interested in political behavior measured the square footage of the desks in the official office of four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The...

statistics
On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20. Give the Z scores for persons who score (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z scores on this test are (d) 2.4, (e) 1.5, (f) 0, and (g) –4.5.

statistics
A person scores 81 on a test of verbal ability and 6.4 on a test of quantitative ability. For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard...

Algebra II
Thats what I thought but I was not sure. Thanks so much.

Algebra II
8x^3 -1 (2x)^3 - 1^3 (2x-1)(2x^2 + 2x + 1^2) -> but this doesnt factor

Business writing
Writing questions for examination on letters and Proposal writings in English for College Examination.

business
c. What factors should drive a company to continue in, expand, or exit its chosen market

chemistry
are you in my Peel online class too?

chemistry
According to the equation CH3COOH + NaOH ---> NaCH3COO + H2O is the the ratio in which the acid and the base react 1:1? How can I calculate the molar concentration of the acetic acid from this information?

business
Across all 12 countries, prices are now listed in common currency, the euro, and centuries-old currencies have been retired from circulation. Although the change has been emotionally difficult for many people, the European Union did it for solid economic reasons. The potential...

business
What are the benefits to Britain, Sweden, and Denmark of staying out of the euro zone? What are the potential costs? Do you think these countries will eventually join the euro zone? Under what circumstances will they join?

social studies
The monarchies of Russia, Austria, and Prussia enacted policies that: A. increased the role of the military B. Sought to seperate religion from the control of the state C. excluded nobles from all areas of public life D. worked to create an alliance against the French in the S...

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