Tuesday
September 23, 2014

Posts by jay


Total # Posts: 1,072

chemistry
Pure aluminum has density 2.70g/cm^3. If we add a solid aluminum cylinder to a graduated cylinder containing 19.2 of water, and the water level in the cylinder rises to 24.7 ml, what is the mass of the aluminum cylinder?
September 19, 2014

chemistry
Acetone, a common solvent has a density 0.79g/cm^3 at 20C. What is the volume of 85.1g of acetone at 20C? What is the mass of 125ml of acetone at 20C? Show your calculations.
September 19, 2014

math 6th grade
Maritza is baking cookies to bring to school that requires 3 eggs and 2 cups of sugar. To have enough for everyone she bought 12 eggs will 6 cups of sugar be enough? I tried multiplying 3 x 4 = 12 so then multiplied 2 x 4 which is 8 so there would not be enough but we are ...
September 17, 2014

4th grade math
GCM OF 12 and 20. Please explain
September 17, 2014

math
a living room measure 450 x 330cm. find the dimension of the largest square tile that can be used to tile the floor without cutting
September 15, 2014

maths b
use the z score table to find the floolwing: a) p(1.2<z<2.4) b) p(z>1.675) please show working out
September 11, 2014

maths a
us e the formula z=x-u/SD to determine the z score for a score of 34.5 a normal distribution if the mean is 46.5 and the standard deviation is 8.7
September 11, 2014

maths a
Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your decision. ...
September 11, 2014

BUS
Please Help! 3. According to the text, today’s public relations firms offer all the following services EXCEPT: executive speech training. research and evaluation. advertising placement. events management. Question 4. 4. All of the following are examples of the public ...
September 8, 2014

Bus
Please help! Which is not a component of basic public relations practice? counseling employee relations fund-raising networking
September 8, 2014

algebra
You live under a bridge that goes over a river. the underneath side of the bridge is an arc that can be modeled with the function y=-0.000407x^2+0.658x.Where x and y are in feet. How high is the bridge? How long is the section of bridge above the arc?
September 5, 2014

chemistry
A sprinter set a high school record in track and field, running 200.0 m in 21.0s . What is the average speed of the sprinter in kilometers per hour?
September 4, 2014

Maths
A student says that a speed of 50m/s is faster than a speed of 140km/h because the number is bigger.What would you say to them?
September 3, 2014

Math
•The x-intercepts of the graph of y=f(x) •The real zeros of the function f •The real solutions to the equation f(x)=0 Use the equation f(x)=4x−28 to verify that all three do produce answers that are numerically the same.
August 28, 2014

College Bio
If two parental organisms of genotype pp and PP were crossed, what percentage of F1 offspring would be homozygous recessive? (Assume simple Mendelian pattern of inheritance and unlinked alleles.)
July 26, 2014

College Algebra
Give two functions f(x) and g(x) such that (fg)(-1)=4
July 24, 2014

College Algebra
Thanks
July 24, 2014

College Algebra
i still don't get it. Thanks
July 24, 2014

College Algebra
Give two functions f(x) and g(x) such that f(g(2))=7
July 24, 2014

College Algebra
give a logarithmic function g(x) such that g(49)=2
July 24, 2014

College Algebra
Give a piece-wise function p(x) where p(2)=5 and p(-1)=3
July 24, 2014

maths
As compared to its first year of operation, ABC Company grew 8% in the second year and an additional 2% per year for the next two years. If total growth for years 2-4 was $45,000 over the first year’s sales of $150,000, how much did ABC Company grow in year 2?
July 22, 2014

art history
A mastaba is:
July 16, 2014

phys
I got it now. (2c)(450-T) = (c)(T-300) Solve for T
July 7, 2014

phys
The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is: ans is 400 K how?
July 7, 2014

phys
The coefficient of expansion of a certain steel is 0.000012 per C^(degree) . The coefficient of volume expansion, in (C^(degree))^-1, is: A) (0.000012)^3 B) (4pi/3)(0.000012)^3 C) 3 x 0.000012 D) 0.000012
July 7, 2014

algebra
Find all zeros of the polynomial P(x)=x^3 - 2 x^2 - 9 x - 30.
July 6, 2014

us hist
In comprison with John Kennedy, Lyndon Johnson was A. better educated B. more skillful at working the congress C. a better public speaker D. personally more charismatic Ans: D Eisenhower's attempt to develop better soviet-american relations was severely hurt by the A. ...
July 3, 2014

Psychology
What is Classical Hierarchial Classification?
June 30, 2014

psychology
Which one of the following statements about intelligence is the most accurate a. Iq is a valid measurement, and environmental factors do not change mental ability b. Intelligence is mostlygenetic has the most variability between groups and is reliable regardless of the ...
June 21, 2014

Algebra II
Opps square root symbols didn't come out right sorry.
June 15, 2014

Algebra II
This is what it looks like: (¡Ìn + ¡Ìn − 1) (¡Ìn − ¡Ìn − 1) = 1 for n ¡Ý 1
June 15, 2014

Algebra II
I have the same question for homework.
June 15, 2014

Algebra II
And it is the (square root of n + the square root of n-1)(square root of n - square root of n-1)= 1 for n great than or equal to 1.
June 15, 2014

Algebra II
It is a fuction.
June 15, 2014

geometry
What inequality represents the sentence below? The product of a number and 5 is no more than 8. A. 5n < 8 B. 5n > 8 C. 5n>8 D.5n<8
June 2, 2014

geometry
Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
June 2, 2014

nutrience
What is the maximum heart rate for a 35-year-old? A. 121.1 B. 183.5 C. 187 D. 205.55
June 2, 2014

us hist
Grover Cleveland is to fathering a child out of wedlock as James G. Blaine is to: Questionable loyalty to his country Drug addiction Honesty Political reform None of the other answer choices is correct Not political reform. is it honesty....
May 15, 2014

us hist
You have many skills, a broad variety of work experiences and a college degree. Do you favor the Pendleton Act? Only in the eastern industrial regions Only in the southern states Yes No I know its not no. is it yes or..
May 15, 2014

us hist
Complete the following progression: AGRARIAN DISCONTENT; the GRANGE ASSOCIATION; FARMERS’ ALLIANCES; The Populist Party Unionization The election of Rutherford Hayes as President Coxey’s Army The Grange associations is it the populist party
May 15, 2014

econimic
Command economies: A. Are considered a type of mixed economy B. Are considered a type of free market economy C. Oppose private property, free market pricing, competition, and consumer choice D. Encourage private property, free market pricing, competition, and consumer choice
May 12, 2014

Math
Last will of an eccentric lady reads: I bequest $1000 less then one half of my estate to my beloved red cat. I bequest $800 less then one third of my estate to my favorite striped cat. I bequest $600 less then one quarter of my estate to my darling black cat. All my money must...
May 8, 2014

phys
never mind i got it.
May 1, 2014

phys
A disk with a rotational inertia of 2.0 kg.m^2 and a radius of 0.40 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 5.0 N is applied tangentially to the rim. The angular acceleration of the disk is:
May 1, 2014

chem
One mole of pentanol (C5H11OH) contains how many hydrogen (H) atoms?
April 27, 2014

chemistry
sup
April 27, 2014

science
Given the following reaction: CaC2 + 2 H2O C2H2 + Ca(OH)2 How many moles of Ca(OH)2 will be produced if 5.800 g of CaC2 are reacted completely?
April 27, 2014

phys
A wheel starts from rest and has an angular acceleration of 4.0 rad/s^(2). When it has made 10 rev its angular velocity is:
April 27, 2014

Chemistry
You added how may mols NaOH? That's M x L = mols. What final volume do you have. You added 18.01 mL and 10 mL so total volume is 28.01 mL. Convert that to L., then M = mols/L Do I do 0.1M x .01801L = 0.001801mols? Then do M = 0.001801mols/0.02801L? I'm a little ...
April 25, 2014

Chemistry
I am trying to complete a lab called Precipitation Titration of Cobalt Chloride. I've done the experiment and I got that if you combine 18.01mL of 0.1M NaOH with 10mL of CoCl2, the precipitate is forms. Now how do I calculate the concentration of the amount of NaOH I added...
April 25, 2014

Health
What are the barriers that prevent older people from diverse groups from accessing mental health care for depression?
April 24, 2014

Physics
What is the partial pressure of water on a day when the temperature is 25C and the relative humidity is 33% P=___Pa
April 22, 2014

statistics
Using the 95% level of confidence, what is the confidence interval for the proportion of households represented at a town meeting
April 21, 2014

Calculus Please Need Urgent3 :/
Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. F(x)= (s^2)/(1+3s^4)ds from sqrtx to 1 F'(x)=? Thank you so much guys!
April 19, 2014

Calculus Please Need Urgent2 :/
Consider the function f(x) whose second derivative is f''(x)=8x+4sin(x). If f(0)=3 and f'(0)=2, what is f(x)? f(x)=??
April 19, 2014

Calculus Please Need Urgent :/
Find the most general antiderivative of f(x)=–8e^x–6secant^2(x) where -pi/2<x<pi/2 Note: Any arbitrary constants used must be an upper-case "C". F(x)=?
April 19, 2014

Calculus Help Please!
If f(x)=Integral (t^3+6t^2+4)dt from 0 to x then f''(x)=?
April 19, 2014

PLEASE HELP!
Let integral f(x)dx=9 from -6 to -1.5 integral f(x)dx=7 from -6 to -4.5 integral f(x)dx=4 from -3 to -1.5 A. Find integral f(x)dx from -4.5 to -3 B. Find integral (9f(x)-7)dx from from -4.5 to -3
April 19, 2014

u,s history
By the end of April 1975, which city fell to the North Vietnamese Army, leading to the unification of Vietnam?
April 15, 2014

math
If the consumption function is C = $200 billion + 0.6Y, (a) How much do consumers spend with incomes of $8.25 trillion? I got 5.2 trillion for this. (b) How much do they save? ??
March 29, 2014

math
(b) Round to nearest two decimal places.
March 29, 2014

math
Suppose you borrow $1,000 of principal that must be repaid at the end of two years, along with interest of 5 percent a year. If the annual inflation rate turns out to be 10 percent, (a) What is the real rate of interest on the loan? For this I got -5%. (b) What is the real ...
March 29, 2014

Math
A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
March 28, 2014

statistics
If there are 18 blue socks and 24 black socks what is the probability of pulling out 2 black socks?
March 26, 2014

Math - Quadratics & Analytical Geometry
I have a test tomorrow with a few sample questions that are expected to be on the test that I do not know how to properly do. 1)Find the slope intercept equation of the line passing through the intersection of the lines 2x-4y=1 & 3x+4y=4 and parallel to the line 5x+7y+3=0 2)...
March 23, 2014

math
Nice! Thank You
March 19, 2014

math
B(0,5) F(0,3) G(30,3) C(30,5) Find the area, Area BFGC =
March 19, 2014

Science
I would say gas. A gas moves around freely and has lots of energy.
March 16, 2014

Chemistry
The net reaction for fusion on a star like our Sun is: 4H(1,1) ==> He(4,2) + 2e(0,+1) Calculate the mass defect for this reaction. If one atom of He is formed this way, calculate the energy released. If one Kg of He is formed, calculate the energy released. The masses of ...
March 16, 2014

cal
Finding Partial Derivatives Implicitly. Find dz/dx and dz/dy for 3x^(2)z-x^(2)y^(2)+2z^(3)+3yz-5=0 How would you type this in wolfram alpha calcultor to get the answer? Thanks,
March 15, 2014

grammar
special nouns are abstract nouns like names of qualities,emotions or ideas
March 6, 2014

Chem
if 0.25L of gas is placed in a container at 500K and 104 kPa and the temp is increased to 750K and the pressure is increased to 120kPa what is the new volume of the gas
March 6, 2014

basic excel
Write one Microsoft excel formula that works for conditions below on cell C1 for any number: a) IF A1+B1<=4, return $20 b) IF A1+B1>4 but <=9, return $35 c) IF A1+b1>9 but <=14, return $50 d) And IF A1+B1>15, return $75
March 3, 2014

Algebra
Two positive numbers differ by 11. When the larger number is divided by the smaller, the quotient is 2 and the remainder is 4. what are the numbers
February 28, 2014

Math
Jay b-3
February 20, 2014

phys
An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s^2 west for 3 seconds. During this time the object travels a distance of:
February 9, 2014

Math
Find Curvature, find the curvature k of the curve, where s is the arc length parameter. r(s)=(3+s)i+j
February 8, 2014

math vector
Find the Principal unit normal vector to the curve at the specified value of the parameter. r(t)=ti+t^(2)j+lntk, t=1
February 8, 2014

math vector
r(t)=〈 2 sin t, 2 cos t, 4 sin^(2) t 〉 at the point (1, sqrt(3),1) For this it is t=pi/6 to (1,sqrt(3),1). Can you show me how it is t=pi/6?
February 7, 2014

math vector
How do you know that t=0 at (0,0,0)? How do you find it?
February 7, 2014

math vector
Find the unit tangent vector T(t) and find a set of parametric equations for the line tangent to the space curve at point P. r(t)=ti+t^(2)j+tk, P(0,0,0)
February 7, 2014

math vectors
Find the angle between two vectors. In radians and in degrees. u=<1,0,-3>, v=<2,-2,1> I got radians = 1.676 degrees = 96
February 5, 2014

EASY Volume of shapes
thanks for the help
February 1, 2014

EASY Volume of shapes
The right triangular prism has bases that are equilateral triangles. The height is 8 in and the side of the base is 5 in , what is the prism's volume?
February 1, 2014

business math
Weekly pay: $253.07 Not married Exemptions: 3 What is the federal tax? $19
January 22, 2014

Math
A family has two cars. The first car has a fuel efficiency of 40 miles per gallon of gas and the second has a fuel efficiency of 30 miles per gallon of gas. During one particular week, the two cars went a combined total of 1250 miles, for a total gas consumption of 35 gallons...
January 20, 2014

Math
A family has two cars. The first car has a fuel efficiency of 40 miles per gallon of gas and the second has a fuel efficiency of 30 miles per gallon of gas. During one particular week, the two cars went a combined total of 1250 miles, for a total gas consumption of 35 gallons...
January 18, 2014

Math
The sum of two numbers is 53 . The larger number is 13 more than the smaller number. What are the numbers?
January 18, 2014

Math
Can you simplify a4 b + a2b3 please thank you.
January 8, 2014

World History
Nevermind, I got it :)
January 2, 2014

World History
Someone help me, please!
January 2, 2014

World History
What factors spurred the technological development during Western Europe in 1500-1750? Are there particular conditions that favor technological innovation?
January 2, 2014

math
4+5 times 6/2
December 24, 2013

us history
Thank you very much Ms. Sue for your help. =)
December 7, 2013

us history
African American troops in the Union army: A.were from the begining an itergral part of mnay fighting units. B.distinguished themeselves in battles in Louisiana. C. None of these I read first. And I came up with B. is this right.
December 7, 2013

us history
C.
December 7, 2013

us history
ALL the following accurately characterize the advantages of the North and South EXCEPT: a. The Union had far greater industrial capacity, more railroads and more ships. b. The South had far more usable food supplies than did the Union. c. The Union had four times more white ...
December 7, 2013

us history
Manassas
December 7, 2013

us history
The first major battle of the civil war took place at Vicksburg Manassas Antietam Shenandoah I chose Antietam. Right
December 7, 2013

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