Wednesday
August 27, 2014

# Posts by l

Total # Posts: 164

physics
A snail moved 0.14 m between two cabbages in 3.0 minutes. The average speed of the snail is
July 31, 2014

physics
A bus traveled 10.0 km from the north end of the city to the south in 10.0 minutes. The average speed of the bus was
July 31, 2014

physics
Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?
July 31, 2014

physics
Initial sources of energy used to operate machines were __________ and __________.
July 31, 2014

physics
A machine loses 600 kJ as waste heat while producing 5,350 kJ of useful energy output. The efficiency of this machine is
July 31, 2014

Ms. Sue,
Thank you!
July 30, 2014

world history
Which of the following statements is true of the Gulf of Tonkin affair? A. Johnson told Congress to pass the Gulf of Tonkin Resolution to let him expand the war. B. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. C. The destroyer Maddox was sunk...
July 30, 2014

Accounting
During its first year of operations, Maria Rose set up Roseland Inc. and invested \$25,000 in the corporation. The company earned \$68,000 of revenues and incurred \$32,000 of expenses. At the end of the year, the company owed \$24,000 to its creditors. A cash dividend of \$5,000 ...
July 13, 2014

precal help asap
solutions to the equation tan^2x - 3 = 0 ( there can be more than one) 2pi/3 pi -pi/3 5pi/3
May 28, 2014

PRECAL MULTIPLE CHOICE
If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B? B= 62.3 or 117.7 B = 62.3 B = 117.7 there is no solution
May 28, 2014

precal help asap
If a triangle ABC has A = 52 degrees, side a = 178, and side b = 234, then what is the measure of B?
May 28, 2014

Precal, TRUE OR FALSE
TRUE OR FALSE The motion of a pendulum for which the maximum displacement from equilibrium varies is an example of simple harmonic motion.
May 28, 2014

Precal
An arc of length 30 meters is formed by a central angle A on a circle of radius 15. The measure of A in degrees (to the nearest minute) is
May 28, 2014

How many solutions does a triangle with values a = 42, A = 117 degrees, and b = 34 have
May 28, 2014

The angles of elevation theta and alpha to an airplane from the airport control tower and from an observation post 2 miles away are being continuously monitored. If theta is 42 degrees when alpha is 81 degrees, how far is the plane from the observation post?
May 26, 2014

Precal
A distress flare is shot straight up from a ship’s bridge 75 ft above the water with an initial velocity of 76 ft/sec. a) Write a set of parametric equations for the path of the flare. ______________________________ ______________________________ What window gives you ...
May 26, 2014

Precal
Can someone please help me with the last 4 questions in this paragraph? Suppose that Tiger hit a golf ball with an initial velocity of 150 ft/sec at an angle of elevation of 30°. Write the parametric equations to represent the flight of the ball. How long is the golf ball ...
May 26, 2014

Physics
A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation axis is 0.800 MR2. ...
April 11, 2014

algebra
What is the first step you should take to solve the following expression: 2 – 16 ÷ 4 × (3 + 2)2 + 1 ? A. 16 ÷ 4 B. 2 – 16 C. 3 + 2 D. 22
November 15, 2013

Algebra
Remove the parentheses from the following expression, and combine like terms: (2x + 3y – 4z) – (x – y – z) A.3x +4y+5z B. 3x + 4y – 3z C.x +4y–3z D. x + 2y – 5z
November 15, 2013

Medical Billing and Coding
A. 434.91, 438.21, 438.12, 250.00 305.1, 88.91, 93.39, 93.72
November 1, 2013

Medical Billing and Coding
B. 434.91, 342.91, 784.59, 250.00, 305.1, 88.91, 93.39, 93.74
November 1, 2013

physics
9.816
July 28, 2013

Physics
June 15, 2013

Chemistry
What is the concentration of the resulting solution when 250 mL of 0.1 M K3PO4 and 300 ml of 0.5 M K3PO4 are mixed?
June 10, 2013

algebra
In a class of 50 students, the number of women is 2 more than five times the number of men. How many women are in the class?
March 19, 2013

Physical Science
The transfer of heat that takes place because of the density difference in fluids is
March 18, 2013

Physics
An object is thrown vertically upward at 18m/s from a window and hits the ground 1.6s later. What is the height of the window above the ground?(air resistance is negligible)
December 29, 2012

math
Write two expressions that show that increasing a quantity by 4% is the same as multiplying that quantity by 1.04.
December 5, 2012

Math
A line has a slope of 6/7 and a y-intercept of -5. Which of the following is the equation of the line? 7x - 6y = -35 7x - 6y = -5 6x - 7y = 35 6x - 7y = -35 I'm honestly not sure with this, I'm thinking that it's 7x - 6y = -5.. Not sure though. Also, could you ...
October 31, 2012

Finance
Here is a forecast of sales by National Bromide for the first 4 months of 2012 (figures in thousands of dollars): Month: 1 2 3 4 Cash sales 19 28 22 18 Sales-on-crdt 140 160 130 110 On average, 40% of credit sales are paid for in the current month, 20% in the next month, and ...
October 10, 2012

trig
what is 7pi/3 in degree .13pi/3 in degree
October 10, 2012

Calc
The region bounded by y=2.5x^2 and y=4x is to be rotated about both axes and the volume generated calculated by both the washer and the shell methods. 1)The volume of the region bounded by y=2.5x^2 and y=4x, when rotated about the x-axis is? 2) The volume of the region bounded...
September 16, 2012

Chem
Great! Thank you!
September 12, 2012

Chem
thanks! all i did for a was change 2.4 by converting it in the manner they said, from feet to inches, inches to centimeters. same with 19.3. i changes it from grams to pounds.
September 12, 2012

Chemistry
actually, thats not the right answer. you end up getting .21 which is wrong for some reason.
September 11, 2012

Chemistry
thanks. i wanted the actual way to get it, but whatever.
September 11, 2012

Chemistry
A bug is observed to travel 72 cm in 7.5 seconds. What is the bug's speed in miles per hour?
September 11, 2012

science
does anyone know?
September 9, 2012

science
September 9, 2012

science
a. Evolution of human and bat forelimbs was adaptive, but not for whales. b. Humans and bats evolved by natural selection and whales evolved by Lamarckian mechanisms. c. Whales are not properly defined as mammals. d. Natural selection in an aquatic environment resulted in ...
September 9, 2012

science
Analysis of forelimb anatomy of humans, bats, and whales shows that humans and bats have fairly similar skeletal structures, while whales have diverged considerably in the shapes and proportions of their bones. However, analysis of several genes in these species suggests that ...
September 9, 2012

SCIENCE
Celsius, grams, liters, and meters, if you mean the metric system
September 9, 2012

math
2.78 (rounded to the nearest 100th)x 10^3
September 9, 2012

Math
Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!
September 7, 2012

Maths-Trigonometry
a kite is attached to a string that is 15m long. If the string makes an angle of 26 degrees to the horizontal the height of the kite is.
July 28, 2012

Pre-Calc
Hello! I'm stuck on how to do this problem and would appreciate some help! Choose a non-zero complex number c for f(z) = z2+ c. Find a complex number v that is in the escape set. Find a complex number w that is in the prisoner set. Graph the first five iterations of both v...
May 17, 2012

Art
Yes, that makes sense. Thank you!
May 16, 2012

Art
Well if that is not the answer then it would have to be A because C and D kind of go hand and hand.
May 16, 2012

Art
Can you help with one more thing? The features of mosaic art include the following EXCEPT: A)background is naturalistic B)figures usually have stiff and stylized gestures C)outlines are made clear and bold D)the overlapping of figures is avoided B
May 16, 2012

Art
Great! Thank you!
May 16, 2012

Art
Any help is appreciated! What are Pendentives? A)Free standing pillars B)Semicircular arches C)Octagonal lintels D)Hemispherical dome I'm not sure about this one. They are not A because they were not freestanding. D could be right because I've seen them described in ...
May 16, 2012

History
The new morals and manners of the 1920s were reflected in A. women's fashion B. the great migration C. the new factory jobs D. Politics Americans responded to the Selective Service Act A. with enthusiasm B. with antiwar riots C. by refusing to register D. by becoming ...
May 7, 2012

Chemistry
Thank You!
April 26, 2012

Chemistry
The Kp for the following equilibrium system is 4.31 x 10‒4 at 375°C : N2(g) + 3H2(g) ↔ 2NH3(g). If 0.862 atm of N2 and 0.373 atm of H2 were mixed in a constant-volume flask and heated to 375°C, which of the following would be closest to the equilibrium ...
April 26, 2012

language
does a type sketch always have to be written negatively? Can one write a type sketch from a positive point of view? Instead of pointing out vices or folly, can one point out good attributes? Thanks
April 21, 2012

math
The length of A'B is '18.12' For sure it's the right answer.
February 10, 2012

chemistry
Radioactive materials are often used in biological studies. A radiation biologist studies the rate of decomposition of a certain substance and obtains the following data: Time(days) 0 4.0 8.0 12.0 16.0 Mass (μg) 15.50 10.90 7.67 5.39 3.79 Determine the rate constant in ...
February 4, 2012

math
juanita planted 2 flower gardens in similar square shapes. what are the measures of all the angles in each garden? explain how you know.
January 3, 2012

Mel’s Furniture received an invoice dated September 27 for five bedroom sets at \$3,000 each. The invoice indicated a trade discount of 5/8/3. The seller of the furniture prepaid the freight of \$200. Terms were 2/10 EOM. Assuming Mel pays on November 2, what amount would ...
December 27, 2011

Chemistry!!
Calculate the pH of 10.00 mL of 0.40 mol/L of hydrochloric acid.
November 26, 2011

algebra
Can u traslate the following into words 3+w 8x 40-p
October 31, 2011

October 30, 2011

Science
20 sec
October 26, 2011

social study
Suppose the president vetoed a bill passed by Congress. According to the information, which of the following? actions by Congress would most likely ensure that the bill will become? 1) let the veto stand 2) reintroduce the same legislation 3) try to override the veto with a ...
September 10, 2011

Physics
The net external force on the propeller of a 3.6 kg model airplane is 8.4 N forward. What is the acceleration of the airplane? Answer in units of m/s 2
September 6, 2011

chemistry
What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) --><-- 4 PCL3(l) Given the following at 200 C P4(s)+ 10 Cl2(g) --><-- 4 PCl5(s) Kc=8.12 PCl3(l)+ Cl2(g) --><-- PCl5(s) Kc=0.771 Answer: 6.7*[10^(-9)] not sure ...
July 20, 2011

chemistry
What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) ---><--- NH4HS(s) Answer: 1.0*[10(-2)] Not sure what to do here; I ...
July 20, 2011

pressure change
What is the pressure change for the reaction below at 25 C in the process of reaching equilibrium if there is initially enough ammonium hydrogen sulfide to reach equilibrium? Kp= 4.0*(10^4) NH3(g)+H2S(g) ---><--- NH4HS(s) Answer: 1.0*[10(-2)] Not sure what to do here; I ...
July 20, 2011

science**
The relationship of algae, moth, and sloth would be classified as?
July 11, 2011

Answer to number 3 is wrong. (didn't realise it was x+4 to the power of two thirds. Sorry):
May 6, 2011

Answer to number 3: 2/3(x+4) = 8 2(x+4) = 24 2x+8 = 24 2x = 16 x = 8
May 6, 2011

Math
1. 8k=6k-26 2k = -26 k = -13 2. 5/8a +6 = 6/8a 6 = 1/8a 48 = a 3. 3/12n +10 = 8/12n 10 = 5/12n 120 = 5n 24 = n 4. 20 - 2/10d = 3/10d +16 4 = 1/2d 8 = d (I think. You should check.)
May 6, 2011

com/220
when do you normally find information for topics that interest you? how do you know when sources are reliable.
April 5, 2011

calculus
f(x)=x^2-3x+1/x^2
February 17, 2011

math
principal is \$750.00 rate is 9 1/2% for 200 days using a 360 day calendar year what's the interest?
February 16, 2011

Nursing
How many calories can 1L of TPN contain?
February 12, 2011

calculus
The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.
December 20, 2010

Precalc
The number N of bacteria in a culture is given by the model N=250e^kt where t is the time (in hours). If N=280 when t=10 estimate the time for the population to double in size.
December 20, 2010

Chemistry
Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02
December 2, 2010

Chemistry
Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average: (4.32g+4.17g)/2 =4.25 The values I used and their uncertainties: 4.32g +/- 0.02 4.17g +/- 0.02
December 2, 2010

math
The mean is calculated with this general formula: mean= (sum of numbers in a set)/(# of numbers) You know that for a set of 36: Mean=27 # of numbers=36 So: 27=(sum of numbers in a set)/36 which can be rearranged as: sum of numbers in a set=27*36 sum of numbers in a set=972 ...
December 2, 2010

math
Make an equation to help you solve! We know that: Side1=16cm Side2=Side3 Let's name Side1 x, and Side2 and Side3 (Because they are the same) y. Perimeter=Side1+Side2+Side3 Perimeter=x+y+y Perimeter=x+2y Sub in your value for x: P=16+2y Now, we also know that: 2P=(Side1+...
December 2, 2010

math
Hm, it's not clear as to what it means by 'why', but if you calculate what 3 pencils would cost, and do the math as if you didn't buy those three pencils, the change will be 3.58. So perhaps with 'why' you could say that the cashier forgot to include ...
December 1, 2010

Social Studies
It does charge for complete articles, but it does have a short brief which is free. For a very general idea of what you are looking for, the Encyclopedia Britannica is fine. Sra's suggestions are very good, though.
December 1, 2010

Social Studies
A lot of these can't really be 'defined', but a very good website where you can find a general idea of what these things are is the Enyclopaedia Britannica website. I hope this helps (:
December 1, 2010

Chemistry
I'm not entirely sure what you mean, but after a thorough search through notes I think I might get it... correct me if I'm wrong? I need to use relative uncertainties, and then use the relative uncertainty to find the uncertainty? (I know how to do both of those, I ...
December 1, 2010

Chemistry
When finding uncertainties in measurements, I know that if you are adding or subtracting, you must add the uncertainties of the two values. But what do I do if I multiply/divide?
December 1, 2010

algebra
For a, you are given the number of minutes, which is represented by x. Simply substitute your value of x (25) into the equation (y=35+0.8x) to find the value of y, which is the distance of the sports car from Flint. For b, you are given the distance of the sports car from ...
December 1, 2010

spanish
i need 10 interrogative sentences in spanish talking about being on vacation.
November 23, 2010

Calculus - integration
Integral of (2x+5sin(x))^2 dx i didnt know how to start this question so i expand the squre first and then did the rest but its wrong and i dont think my method is right. thank you.
November 2, 2010

Calculus - integration
Thank you so much!!!
November 1, 2010

Calculus - integration
Q. ¡ò(15^x/3^x) dx i know that the ¡ò(a^x) dx = a^x/lna +c but i dont know how to solve this question. thank you
November 1, 2010

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