Posts by George
Total # Posts: 1,113

Physics
Is the average velocit over a specific timeinterval always half of the instantaneous velocity at the end of the interval. I said False, because if the curveis not linear this would not be true. Would this be a a sufficent answeror am I missing anything. 
ALGBERA
Can you help me set it up please? 
Algebra
Please help me solve: [SQRT(x)]=2 1. [SQRT(2x2  1)]=x 
Math
Thanks! 
Math
Given a polynomial and one of its factors, find the remaining factors of the polynomial. Some of the factors may not be binomials. 169x^31690x^29x+90; x10 
Math(Algebra 2)
Also, if someone is still avalibe the problem is asking me to factor 2a^232 
Math(Algebra 2)
Wait actually I meant to put a^2+4a+21 would the answer be a+7 a+3? 
Math(Algebra 2)
yeS I did mean to write it the way you put it. Thank you. For the second problem, if I do this 2a^2=32 /2 a^2=16 /^2 a=4? 
Math(Algebra 2)
by the way thats 2a^2 squared and a^2 squared. Thanks. 
Math(Algebra 2)
All of these are different problems. Please help me. IF you only know one answer to just one problem, that is totally welcome as well. THank you. 5 > x  + 1 2a232 a2 + 4a + 21 
American History
Thank you. 
American History
July 30,31st 1977, Sept 10, 1977 Those are the only ones 
American History
The letters she wrote to her husband John Adams 
Economy
Need help here plz. In a private closed economy, if aggregate expenditures equal GDP, then... A = Consumption equals investment B = Planned investment equals to saving. C = Disposable income equals consumption minus saving D = Consumption equals aggregate expenditures. 
Physics
John is carrying a shovelful of snow. The center of mass of the 3.00 kg of snow he is holding is 15.0 cm from the end of the shovel. He is pushing down on the opposite end of the shovel with one hand and holding it up 30.0 cm from that end with his other hand. Ignore the mass ... 
Chem
will Ne or Xe have a higher boiling point? why? 
calculus
a box with no top is to be built by taking a 12''by16'' sheet of cardboard and cutting xinch squares our of each corner and folding up the sides. find the value of x that maximizes the volume of the box 
Chemistry
What does fluoride ion have in common with a neon atom and a sodium ion? 
Chemistry
h h h h     hcC====cch     h h h h This is 2butene where do I insert the HI for hydroiodic aci? 
Chemistry
What would be the whole name of 2butene and hydroiodic acid. Or the diagram. h h Any help would be greatly appreciated. 
Chemistry
What is another name or diagram of 2butene and hydroiodic acid. Any help would be greatly appreciated. 
Chemistry
What is another name ordiagram of 2butene and hydroiodic acid. Any help would be greatly appreciated. 
physics
Determine the tangential speed of a point .4 m from the center of the wheel? 
Chemistry
You have the alkane C7H16. What is the IUPAC name. I tried heptane and 4ethyl3methylheptane, but it still says my answer is wrong. What would be the answer then. 
Chemistry
You have the alkane C7H17. What is the IUPAC name. I tried heptane and 4ethyl3methylheptane, but it still says my answer is wrong. What would be the answer then. 
Chemistry
You have the alkane C6H17. What is the IUPAC name. I tried heptane and 4ethyl3methylheptane, but it still says my answer is wrong. What would be the answer then. 
Chemistry
Two people were given 1.75 g salicylic acid and 2.00 mL of acetic anhydride. If the density of acetic anhydride is 1.0820 g/mL, how many grams of aspirin could they have prepared. Is the answer 4.7 g 
Calculus
What is the local linearization of e^x^2 near x=1? Is the answer 1+2x 
Calculus
A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another mile, it is going 80 mph, and the plane has traveled another 5 miles and is going 500 ... 
Calculus
A train is heading due west from St. Louis. At noon, a plane flying horizontally due north at a fixed altitude of 4 miles passes directly over the train. When the train has traveled another 5 miles and is going 500 mph. At that moment, how fast is the distance between the ... 
Hard Calculus
Is the answer then 4 x 10^13 
Hard Calculus
The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the gravitational force changing ... 
Hard Calculus
Is the answer for part B 1C 
Hard Calculus
A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase as the dose ... 
Math Word Problem
At 6am a few bacteria fall into a can of syrup in a broken garbage bag. The conditions of warmth, moisture, and food are perfect for growth and the population doubles every 20 minutes. By 6pm the bacteria are overcrowded and dry and their food is gone.At what time does the ... 
Calculus
The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the gravitational force changing ... 
Calculus
A dose, D, of a drug causes a temperature change, T, in apatient. For C a positive constant, t is given by T=((C/2)(D/3))D^3. (a) What is the rate of change of temperature change with respect to dose. (b) For what dose does the temperature change increase as the dose ... 
Calculus
(A) Find the equations of the tangent lines to the circle x^2 +y^2=25 at the points where x=4. (B) Find the equations of the normal lines to this circle at the same points. (The normal line is perpendicular to the tangent line at that point.) (C) At what point do the two ... 
Calculus
(a) Find dy/dx given that x^2+y^24x+7y=15. (b) Under what conditions on x and/or y is the tangent line to this curve horizontal? Vertical? For part A, I simplifid it to (2x+4/2y+7) For part B,I am confused on what to do? 
Implicit Functions
Find the slope of the tangent to the curve at the point specified. x^3+5x^2y+2y^2=4y+11 at (1,2) So far I simplified it to (3x^210y/5x^2+4y4) which I think then simplifies to (8/3). What do I do from here....? 
Calculus
Suppose f(x) is differentiable at x=a. What does tangent line approximation, y=, mean? Select all that apply (A) Local linearization (B) y=f(x)f(a)f'(a)(xa) (C) The best liner approximation of f(x) near a (D) After zooming y is a good approxiamtion to f(x) (E) f(x)~y=f(... 
Calculus
Suppose f(x) is differentiable at x=a. What does tangent line approximation, y=, mean? Select all that apply (A) Local linearization (B) y=f(x)f(a)f'(a)(xa) (C) The best liner approximation of f(x) near a (D) After zooming y is a good approxiamtion to f(x) (E) f(x)~y=f(... 
Calculus
Suppose f(x) is differentiable at x=a. What does tangent line approximation, y=, mean? Select all that apply (A) Local linearization (B) y=f(x)f(a)f'(a)(xa) (C) The best liner approximation of f(x) near a (D) After zooming y is a good approxiamtion to f(x) (E) f(x)~y=f(... 
Calculus
Find dy/dx of the function 10x^2+4y^2=sqrt(7). Is the answer 20x+8y=0 
Derivatives
Find dy/dx for the function, xyx12y3=0. Is the answer 14,I got this from 1112=0, which solves to 14. 
Calculus
Suppose f(x) is differentiable at x=a. What does tangent line approximation, y=, mean? Select all that apply (A) Local linearization (B) y=f(x)f(a)f'(a)(xa) (C) The best liner approximation of f(x) near a (D) After zooming y is a good approxiamtion to f(x) (E) f(x)~y=f(... 
Calculus
(a) Find the tangent line approximation for sqrt(9+x) near x=0. (b)Find a formula for the error, E(x),in the tangent line approximation found in part (a). For part A, is the answer y=3. For part b, I don't understand , any help would be greatly appreciated. 
Calculus
Find the derivative of 10x^2+4y^2=sqrt(7). Is the answer 20x+8y=0 
Calculus
Find the derivative of the function, xyx12y3=0. Is the answer 14,I got this from 1112=0, which solves to 14. 
Calculus
According to the US Census, the world population P, in billions, is approximately P=6.342e^(0.011t); where t is in years since January 1, 2004. At what rate was the world's population increasing on January 1, 2005? Give your answer in millions per year. Is the answer 6412 ... 
Engineering/Algebra
A cardboard tube has a failure stress of 4,960,000 N/m^2 and an axial stress of 75 N/cm^2, find the factor of safety of the tube. Is the answer 66133.33 
Engineering/Algebra
A cardboard tube is loaded with a 15.3 N axial load. The tube has an outside diameter of 2.5 cm and a wall thickness of .035 cm. Find the axial stress in the cardboard tube. Is the answer 75 N/cm^2? If so can you show me your way of getting to this answer. 
Engineering/Algebra
A balsa wood glider wing has the following properties during flight: Thickness= 0.3175 cm I= 0.0733 cm^4 Moment= 4.2 Ncm Find the bending stress in the wing. Express your answer in N/m^2. Is the answer either 9.096 N/m^2 or 18.192 N/m^2 
Engineering/ Algebra
A balsa wood glider wing has the following properties during flight: Thickness= 0.3175 cm I= 0.0733 cm^4 Moment= 4.2 Ncm Find the bending stress in the wing. Express your answer in N/m^2. Is the answer either 9.096 N/m^2 or 18.192 N/m^2 
Engineering/ Algebra
A balsa wood glider wing has the following properties during flight: Thickness = 0.3175 cm I = 0.0733 cm^4 Moment = 4.2 Ncm Find the bending stress in the wing. Express your answer in N/m^2. Is the answer 9.09 N/m^2 or 18.19 N/m^2 
math
what percent is 23 students out of 51 students and how do you solve it 
Algebra
keep it clean here. 
Calculus
Explain the global optimization process for a continuous function over a closed interval. Be sure to identify all steps involved and clearly explain how the derivative is utilized in this process. Would this be a good explanation? The process of global optimization refers to ... 
Calculus
Explain the global optimization process for a continuous function over a closed interval. Be sure to identify all steps involved and clearly explain how the derivative is utilized in this process. Does this have to do with the first derivative rule or second derivative rule ... 
Calculus
A rectangular beam is cut from a cylindrical log of radius 30 cm. The strength of a beam of width w and height h is proportional to wh^2. Find the width and height of the beam of maximum strength. Is the width 45 and the height 20. 
Calculus
A rectangular swimming pool is to be built with an area of 1800 square feet. The owner wants 5foot wide decks along either side and 10foot wide decks at the two ends. Find the dimensions of the smallest piece of property on which the pool can be built satisfying these ... 
Calculus
Explain the global optimization process for a continuous function over a closed interval. Be sure to identify all steps involved and clearly explain how the derivative is utilized in this process. Does this have to do with the first derivative rule or second derivative rule ... 
Calculus (Global Max)
Explain the global optimization process for a continuous function over a closed interval. Be sure to identify all steps involved and clearly explain how the derivative is utilized in this process. Does this have to do with the first derivative rule or second derivative rule ... 
Calculus
The hypotenuse of a right triangle has one end at the origin and one end on the curve y=x^(7)e^(7x) , with x greater than or equal to 0. One of the other two sides is on the xaxis, the other side is parallel to the yaxis. Find the maximum area of such a triangle. Round your... 
Calculus
Find a forula for the following function. A line with slope 5 and xintercept 10 is the answer y(x)= 5x50 
Calculus
Find a formula for the following function. A parabola opening downward with its vertex at (6,1) and y intercept equal to 35. (y1)^2=4(35)(x6) Please help 
Algebra
Find a forula for the following function. A line with slope 5 and xintercept 10 is the answer y(x)= 5x50 
Calculus
Use analytical methods to find the exact global maximum and minimum values of the function f(x)=8xln(4x) for x >0. If a global maximum or minimum does not exist, enter the word NONE. For the global maximum at x=none, But for the Global minimum at x=? Is the Global minimum ... 
SCIENCE
WATS THE REACTION BETWEEN IRON AND SULPER AND WATS THE ENERGY BETWEEN THEM 
math
Is anyone familar with Sharon Wells Math? How do you solve a word problem using their program? 
Social Studies
Rain can collect easily in a dried out waterbed called a _____________ 
Calculus
f(x)=x^3(x^(4)8) Find f '(x) by multiplying out before taking the derivative Is the answer x^12+8+x^128x^3 simplified to 2x^128x^3+16 
Chemistry
Alexander, who weighs 159lbs , decides to climb Mt. Krumpett, which is 5460ft high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100g bar contains 10g of fat, 40g of protein, and 50g of carbohydrates.Alexander wants to know ... 
Chemisrty
I am getting 22.6, but it says that is the wrong answer. 450*2000*4.18=3762000 159*5460*9.8=8507772 I am setting them equal to eachother and getting 2.26, but it says the answer is wrong. Please help. 
Chemisrty
Alexander, who weighs 159lbs , decides to climb Mt. Krumpett, which is 5460ft high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100g bar contains 10g of fat, 40g of protein, and 50g of carbohydrates.Alexander wants to know ... 
Chemistry
Alexander, who weighs 159 , decides to climb Mt. Krumpett, which is 5460 high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100 bar contains 10 of fat, 40 of protein, and 50 of carbohydrates.Alexander wants to know exactly how... 
Chemisty
Is it 450 calories I don't know what you mean by 2mgh 
Chemisty
Alexander, who weighs 159 , decides to climb Mt. Krumpett, which is 5460 high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100 bar contains 10 of fat, 40 of protein, and 50 of carbohydrates.Alexander wants to know exactly how... 
Calculus
Find the derivative. g(x)=cos(x^6) Isn't the answer 6xsin(x^6) 
Calculus
Find the derivative of the given function w=((t^3)+8)^103 Isnt the answer 309t((t^3)+8)^102 
Chemistry
If 560.70 g of water (22degrees) is displaced, what volume of gas displaced it? Any help would be greatly appreciated. I am thinking about using PV=NRT, but do I assume the value of the pressure is 1. Also using 560.7 do i determine the amount of moles? 
Chemistry
A gaseous mixture of and contains 30.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 505mmHG ? I am getting .41 * (505/750)= .27 .27 is my answer, is this right. 
Chemistry
Which metal would you expect to generate more gas when exposed to a weakly acidic solution, K or Ca? I say K because it only needs to lose one electron. Is this true? 
Calculus
At STP, 1.00 g of calcium is placed into an acidic solution, and 407 mL of hydrogen gas is collected. What is the ratio of moles of calcium consumed to moles of hydrogen produced? a)1.37:1.00 b)1.00:1.64 c)0.928:1.00 d) 0.500:1.00 Is the answer A, if so, can you explain the ... 
Chemistry
Butane,C4H10 , is a component of natural gas that is used as fuel for cigarette lighters.At 1.00atm and 23 degrees Celsius , how many liters of carbon dioxide are formed by the combustion of 1.00 of butane? 2C4H10+13O2 yields 8CO2+10H2o Any help would be greatly appreciated 
Chemistry
Butane, , is a component of natural gas that is used as fuel for cigarette lighters.At 1.00 and 23 , how many liters of carbon dioxide are formed by the combustion of 1.00 of butane? 2C4H10+13O2 yields 8CO2+10H2o 
Chemistry
Imagine that you have a 7.00 gas tank and a 3.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145 , to what pressure should you fill the ... 
Calculus
For each value of h, evaluate the following function. Round your answer to four decimal places. lim h>0 (4+h)^(3)64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=0.01 E) h=0.001 F) h=0.0001 For A I got 48.9 For B I got 48.99 For C I got 48.999 For D I got 47.9 For E I got 47... 
Calculus
For each value of h, evaluate the following function. Round your answer to four decimal places. lim h>0 (4+3)^(3)64/h A) h=0.01 B) h=0.001 C) h=0.0001 D) h=0.01 E) h=0.001 F) h=0.0001 For A I got 48.9 For B I got 48.99 For C I got 48.999 For D I got 47.9 For E I got ... 
Calculus
I am given the function P=9e^(0.9t) In the funcion form P=(P initial)(a^t) what are the values of P initial and a P initial is 9 what is a? 
CHemistry
Butane, , is a component of natural gas that is used as fuel for cigarette lighters.At 1.00 and 23 , how many liters of carbon dioxide are formed by the combustion of 1.00 of butane? 
Chemistry
When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas. How many grams of calcium carbonate are needed to produce 81.0 of carbon dioxide at STP? Is the asnwer 80.95 
Chemistry
Imagine that you have a 7.00 gas tank and a 3.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 145 , to what pressure should you fill the ... 
Chemistry
If it takes three "breaths" to blow up a balloon to 1.2 , and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 balloon. Express your answer in moles using two significant figures Would the answer be 0.38 mol? 
Chemistry
If it takes three "breaths" to blow up a balloon to 1.2 , and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 balloon. Express your answer in moles using two significant figures Would the answer be 0.38 mol? 
Calculus
Find the volume of the solid generated by revolving the region enclosed in the triangle with vertices (4.6,4.6), (4.6,0), (6.7,4.6) about the xaxis. 
physics
can someone help with the question below, it really give me a hard time "thought experiments" were to be conducted on moving trains or rocket ships. Answer following question: 1. What would the results of the free fall experimen be if you set the apparatus up and ... 
7th grade
is a pea a fleshy or dry fruit 
Calculus
Find a formula for the derivatives of the function m(x)=1/(x+1) IS the answer 1/(x+h)(x+h+1) 
Calculus
Use algebra to evaluate the limit of lim h>0 (2h)^(3)8/h. Is the answer 12