Saturday
October 25, 2014

Posts by bob


Total # Posts: 2,442

trig
To the nearest degree, all of the following angles are solutions of the equation 2sin x + 4 cos 2x =3 except: (1) 40 degrees (2) 150 degrees (3) 166 degrees (4) 194 degrees
January 29, 2013

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...
January 29, 2013

Physics
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...
January 29, 2013

math
the areas of two similar rectangles are 338 cm squared and 73 cm squared. what is the similarity ratio of the perimeters
January 29, 2013

us history
who developed the first fiscal plan?? was it hamilton and who was the author of the great compromise in constitution? was it madison
January 28, 2013

MicroEcon
Suppose that you supply bottled water in a competitive market and that you are producing the profit-maximizing quantity of bottled water. If you can sell your water at $2 a bottle and you currently employ five workers at a wage of $50 a day, what is the value of the marginal ...
January 28, 2013

science
how to calculate calories is food
January 24, 2013

Statistics
Which of the following statements is not true about samples that can be treated as matched pairs data? I. Data collected on these samples is analyzed by calculating the differences between paired observations and using that data in one sample tests. II. Each value in the first...
January 24, 2013

Physics
C is the correct answer. Both have resistance to current (though the filament's resistance is most likely very small, compared to the resistor). Their combined resistance R1+R2, is the load.
January 24, 2013

Math
It is a square, so you have to find the area, which is length times width. The length is 24 rows and the width is 48 seats. So you do 24 X 48 which equals 1152, so the theater can hold 1,152 people.
January 23, 2013

Math 8 - help!
Y=4X + B
January 23, 2013

Physics
You need to use vectors because there is an angle and you know the initial velocity, and acceleration but not the final velocity. Make a picture and write out all information given to you in columns labeled X and Y directions. Then plug them into different kinematic equations ...
January 23, 2013

English
8.deluged 9. Verges 10. logical
January 23, 2013

physics
what is the velocity of the object as a function of time? for 0s < t < 10s
January 22, 2013

Pre algebra
Thx
January 22, 2013

Pre algebra
On a map the scale is 1 cm:50 ft. The distance between the post office and the fountain is 6 cm. What is the actual distance?
January 22, 2013

Math
Find the general solution F(x,y)=C of the differential equation: (-3(x^2)y-8x)dy+(-3xy^2-8y)dx=0 Where F(x,y)=___________________
January 22, 2013

Math
11.
January 22, 2013

algebra
nt=440
January 22, 2013

Physics
A ball player hits a home run, and the baseball just clears a wall 20.6 m high located 132.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the ground. (a) What ...
January 20, 2013

math
suppose you invest $500 in a savings account that pays 3.5% at an annual interest. When will the account contain $650?
January 20, 2013

per-algebra
whats the sequence,common difference or common ratio and the next three terms of the sequence of 10,18,26,34
January 17, 2013

Geometry :)
Thanks :)
January 15, 2013

Geometry :)
Use coordinate geometry to prove that the quadrilateral formed by connecting the midpoints of a kite is a rectangle. I have no Idea how to do this problem, so if anyone could help I would be very greatfull. :)
January 15, 2013

7th grade art ASAP please
This was perfect!!!!!!!!!!!!!!!!!!!!! All Correct. I just Got 100% on my quiz
January 14, 2013

Algebra
Factor the GCF out of 5x2 - 10x? I know I need to find the GCF of the coefficients but I need to write it using the distributive property. Help please?
January 13, 2013

geometry
What is the most precise name for quadrilateral ABCD with vertices A(–3, 2), B(–1, 4), C(4, 4), and D(2, 2)? 1. parallelogram 2. rhombus 3. quadrilateral 4. rectangle
January 11, 2013

chem
What volume of 0.250 M H2SO4 is required to titrate a solution containing 0.200 g of KOH to its endpoint?
January 11, 2013

chemistry
Calculate the density of M&M’s given the following data: Mass of 250.0 mL beaker = 197.816 g Mass of beaker and 20 M&M’s = 342.816 g Volume of water in graduated cylinder = 8.0 mL Volume of water in graduated cylinder and 10 M&M’s = 18.5 mL (Points : 3)
January 10, 2013

chem
A 14.3 L sample of gas at 23.45°C and a pressure of 123.45 kPa is heated until its temperature reaches 43.20°C and its volume is 16.72 L. What is the pressure of the sample of gas
January 10, 2013

chemistry
A student is asked to prepare 250.0 mL of 3.5 M copper (II) sulfate from solid copper (II) sulfate pentahydrate. Describe how this solution should be made in the chemistry laboratory.
January 10, 2013

Chemistry
Thx :)
January 10, 2013

Chemistry
solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? 2Na + 2H2O ------> 2NaOH + H2
January 10, 2013

math
12 nickels
January 9, 2013

Math
Explanation please
January 9, 2013

Math
Before 1986, a gold bullion in the Federal Reserve Bank was rectangular and had a volume of approximately 727.7 cm3. The density of gold is 19.3 g/cm3. A pound is approximately 454 g. Find the weight of one gold bullion to the nearest tenth of a pound.
January 9, 2013

math
1.1232 players 2. There are 29 teams because 438\15 =29.2 so there will be a remainder of 2 people. 3. There are 16 students on each team because 544/34 =16. 4. 96 people are on teams (P.S. /=division)
January 9, 2013

math
Which of the following values is in the solution set of the inequality -8-7x>-6 a) 2 b) -2 c) -3 d) -1
January 8, 2013

chemistry
The temperature of a dilute 0.847 M solution of NaBr was increased from 25 degrees Celcius to 40 degrees Celcius. What effect did this temperature change have on the molarity of the NaBr solution?
January 3, 2013

ap chem
The diatomic molecule OH exists in the gas phase. The bond lengthand bond energy have been measured to be 97.06 pm and 424.7 kJ/mol.Knowing that only the 2p orbitals of will interact significantlywith mol, respectively. Assume that the OH molecule is analogous tothe HF ...
January 2, 2013

ap chem
Show how a hydrogen 1s atomic orbital and a fluorine 2p atomic orbital overlap to form bonding and antibonding molecular orbitals in the hydrogen fluoride. Are these molecules sigma or pi molecular orbitals?
January 2, 2013

ap chem
nevermind i got the answer
January 2, 2013

math
Each time the same letter appears it represents the same digit.Different letters represent different digits.C+C=D;D+E=17;A+2C=D;2B+C=8.Find the sum A+B+C+D+E
December 20, 2012

Math
As an invesment Mrs. Astor purchased 2 paintings. She later sold the two paintings for $24,000 each. On one painting she made a 20% profit, but on the other she esperienced a 20% loss. Mrs. Astor lost__________ on her investments in the 2 paintings.
December 20, 2012

math
An escalator moves down at the rate of 60 steps per minute. Alan can walk fast up ordinary steps at the rate of 80 steps per minute. There are 50 steps from one level to another. Alan decides to walk fast up the down escalator. How long will it take him to go up one level?
December 20, 2012

help hexagon geometry
iiitss hahaha nto telling you
December 19, 2012

help hexagon geometry
That's not the answer hes dumb
December 19, 2012

Statistics
2 only
December 18, 2012

math
The points A, B, C, D, & E are located on a straight line, in order, in accordance with the following conditions: The distance from A to E is 20 cm The distance from A to D is 15 cm The distance from B to E is 10 cm C is halfway between B & D What is the distance from B to C?
December 18, 2012

Physics
i thank thee for leh answer :D
December 16, 2012

Physics
An electronic motor is revolving at 2000rpm. After 3sec, it is moving at 150rpm. Determine the angular acceleration. What is angular momentum of the electric motor if the rotational inertia is 18.kg.square meter in initial velocity? In final velocity? What is the average ...
December 16, 2012

Grammar-clauses
a,d,b,b,c,a
December 11, 2012

Applied Behavioral
diabetes
December 8, 2012

Cps
Tks. As I thought
December 8, 2012

Cps
HCl+CaCO3 --> CaCl+H3O balanced?
December 8, 2012

The Age Of Jefferson To The American Expansion
hi
December 7, 2012

french
how do you unscramble eiuocrrl in French?
December 7, 2012

Math
ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Sketch a graph of ABC and use it to find the orthocenter of ABC. Then list the steps you took to find the orthocenter, including any necessary points or slopes you had to derive.
December 7, 2012

math
Over a period of 5 games a basketball team made exactly 44% of their shots. the number of shots taken was more than 310 and less than 350. How many shots were made?
December 7, 2012

algebra
What are the coordinates of the point labeled A?
December 5, 2012

math
logan built an enclosure for his chickens. He wanted opposite sides to be parallel, but the adjacent sides to be different lengths. what was the shape of the enclosure?
December 5, 2012

math
Assuming that the temperature has to be below freezing in order for it to snow, if the probability of the temperature being below freezing tomorrow is 85%, and the probability of there being precipitation tomorrow is 25%, what is the probability that it will snow tomorrow?
December 4, 2012

Economics
Your pay stub deducts money for FICA. What does this mean? A. Money is being withheld for personal exemptions and deductions. B. Money is being withheld for excise and estate taxes. C. Money is being withheld to fund Social Security and Medicare. D. Money is being withheld for...
November 30, 2012

History
Thank you Ms. Sue. I believe you have helped me in the past learn history. I'm homeschooled. So sometimes I do research on the internet for help. I came across some questions that you answered and your answers and links have really helped me understand history. Thanks :)
November 29, 2012

History
Ms. Sue. Do you have the answers for English 3 and 4 for Ashworth High School? I have completed all the other classes by myself. But if I don't finish English 3 and 4 by next week, I'll have to repay my tuition. Please help me!
November 29, 2012

physics
Suppose the roller coaster in Fig. 6-41 (h1 = 38 m, h2 = 11 m, h3 = 25) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 45.0 m.
November 29, 2012

precalc/trig
olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1
November 29, 2012

algebra
A store manager bought c calculators for $8. All but four were sold for $10 each. The remaining four calculators were not sold. Find the store's profit, in simplified form, in term of c.
November 27, 2012

Algebra
I solved the problem like that: Sara: 2x Miguel: x 2x+6 =4/3x 18/3 =4/3 -6/3x 6 = -2/3x x = - 9 so Miguel = -9 Sara = -18 Is it correct?
November 27, 2012

Algebra
Sara has twice as much money as Miguel. If she had $6 more. She would have 4/3 as much money as he has. How much money does each have now?
November 27, 2012

algebra
Help... Can you give me answers for the unit test??
November 25, 2012

Physics
An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?
November 21, 2012

Math
A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?
November 17, 2012

Math
A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?
November 17, 2012

Chemistry
Br7C
November 17, 2012

Physics
The diagram below shows a large cube of mass 25 kg being accelerated across a frictionless level floor by a horizontal force, F. A small cube of mass 4.0 kg is in contact with the front surface of the cube. The coefficient of static friction between the cubes is 0.71. What is ...
November 15, 2012

probability
The digits 2, 3, 4, 7, and 8 are each used once in a random order to form a five-digit number. What is the probability that the resulting number is divisible by 4? Express your answer as a common fraction.
November 15, 2012

math
I look at a random time of day at a digital clock (that shows times from 1:00 through 12:59). What is the probability that (ignoring the colon) I see a palindrome such as 8:08? Express your answer as a common fraction.
November 15, 2012

Calculus
A wire 4 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...
November 14, 2012

MATH
L=2 H=1
November 14, 2012

Math
isn't x,y above just -4,-6 ? what do i do with the distance formula?
November 14, 2012

Math
Find the point on the line 1x+7y-4=0 which is closest to the point (-4,-6)
November 14, 2012

Social Studies
If I could have some help on this question I'd appreciate it.I think the answer is B. Which problem would most likely result if banks did not exist? (1 point) People would no longer be able to save money. Money would not move through the economy very well. Spending money ...
November 9, 2012

English
I have to choose which word "neatly" is describing. If neatly is an adverb would it be describing packed? everything owned packed boxes I saw that everything we owned was neatly packed in cardboard boxes.
November 9, 2012

physics
tell me
November 8, 2012

Social studies
Does Inca, Maya, or Aztecs have no central government?
November 8, 2012

algebra
there is a circular tank with diameter 7 min a garden. what will be the cost of fixing fountain pipe all around the tank at the rate of $5 per meter
November 7, 2012

english
Identify the italicized word according to its class in structural linguistics. (There) are no easy answers.
November 7, 2012

Chemistry
Given the information below, calculate the heat provided by combustion of 66.1g of propane (C3H8). ΔHf° (C3H8(g)) = -103.85 kJ ΔHf° (CO2(g)) = -393.5 kJ ΔHf° (H2O(ℓ)) = -285.8 kJ Can Someone explain this in detail? i have to answer this type of...
November 6, 2012

english 2
Neither pesticides nor hormones are used in the production of organic foods. Is there any mistakes here ?
November 6, 2012

math
I need to use calculus to solve this word problem: Find all maximum and minimum values for f(x)= sin(x)+ cos(x) on [0, 2(3.14)] How do I do it?
November 4, 2012

math
Carman wants to cut 3/4 inch peices from 62 long inch wire. How many 3/4 inch peices will she have?
October 30, 2012

Physics
2,3,4
October 30, 2012

math problem
In the multiplication probelem at the right,A,B,C represent different non-zero digits. Each time the same letter appears it represents the same digit. Find the 2 numbers represnted by AA and BC.(0 is zero). A A x B C ------ B B O A A ----- 6 6 0
October 27, 2012

math problem
In the multiplication at the right,A,B,C represent different non-zero digits. each time the same letter appears it presents the same digit. Find the 2 numbers represnted by AA and BC.(0is zero). A A x B C ------ B B O A A ------- 6 6 0
October 27, 2012

math problem
Two large containers each contain the same amount of juice. When 54oz. of the first container are poured into the second container, the second container has 4 times as much juice as the first container. How many ounces of juice did the first container originally have?
October 27, 2012

Math problem
Mrs. Jones owns 4/7 of the stock in a small business and Mrs.Brown owns the rest. Mrs. smith agrees to give $21,000 in exchange for 1/3 of the stock. The $21,000is to be divided between Mrs. jones and Mrs. Brown so that all three will now have equal share of stock. How much of...
October 27, 2012

Physics help
1.)166.67N 2.)83.333N
October 26, 2012

math homework
x is defined as one more than the number of digits in the number x . For example , 1000 = 5. For what value of x wil x = x ?
October 25, 2012

math homework
Mr. Burton rides out into the country on his bicycle at 9 mph . Four hours later he starts back riding his bicycle at 6 mph. How long will it take him to get back?
October 25, 2012

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