Wednesday
October 1, 2014

Posts by John


Total # Posts: 6,261

math
In 1968, the estimated population of the world was 3,559,028,982 people. When this number is written in expanded form using exponents, one power of 10 would not be represented. Which power of 10? Why?
September 13, 2011

math
Polynomials: -5a3power (4a4power – 3a + 1)
September 13, 2011

college algebra
The goal of this problem is to solve the equation by completing the square. x^2-9x+14=0
September 13, 2011

Math Algebra 2
m1v1 + m2v2=(m1+m2)v3 find m1 If you could please explain it too or show the steps I would appreciate it.
September 13, 2011

college algebra
Perform the indicated operation(s) and express the result in standard form. Leave answers in terms of square roots (do not use decimals). (-9-sqrt-3)^2
September 13, 2011

college algebra
Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))
September 13, 2011

math
Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))
September 13, 2011

math
Perform the indicated operation(s) and express the result in standard form. Leave answers in terms of square roots (do not use decimals). (-9-sqrt-3)^2
September 13, 2011

Physics
A rocket is launched from rest. After 8.0 min, it is 160 Km above the Earth’s surface and is moving at a speed of 7.6 Km/s. Assuming the rocket moves up in a straight line, what are its (a) average velocity and (b) average acceleration?
September 13, 2011

Physics
A. A small plane departs from point A heading for an airport at point B 480 km due north. The airspeed of the plane is 200 km/h and there is a steady wind of 50 km/h blowing northwest to southeast. Determine the proper heading for the plane. B. How long will the trip take?
September 12, 2011

physics
An airplane of mass 2800 Kg has just lifted off the runway. It is gaining altitude at a constant 2.3 M/s while the horizontal component of its velocity is increasing at a rate of 0.86 M/s2. Assume g= 9.81 M/s2. (a) Find the direction of the force exerted on the airplane by the...
September 12, 2011

Science
what would tides be like if the moon did not exist? a) There would be no tides without the moon's gravity. b) There would be one high tide and one low tide every 24 hours because of the sun's gravity, with the high tide at noon and the low tide at midnight. c) There ...
September 11, 2011

Science
Why doesn't the space station fall toward the earth, instead of remaining in space? a) It is beyond the earth's gravitational pull. B) The earth's gravity is balanced out by the attraction of the sun and other planets. C) Centrifugal force keeps it up. D) It does ...
September 11, 2011

physics
Bob jumps into a pool, after he stops moving and becomes stationary i the water. What happens to his k energy?
September 11, 2011

Physics
0.3857142857
September 11, 2011

physics
Bob jumps into a pool, after he stops moving and becomes stationary i the water. What happens to his k energy?
September 11, 2011

Physical Science
The diving board is 3m above the floor thats all the information i was given
September 11, 2011

Science
Please help Thank you. 1. What will the impact be like for Humanity’s natural resource base and thus economic security if everyone enjoyed the same lifestyle?
September 11, 2011

Science
Can someone please help me with these questions below thank you. 1. What do you think the impact of the earth's climate will be like if everyone enjoyed the same lifestyle? 2. What will it be like for The health of ecosystems and biodiversity? 3. What will the impact be ...
September 10, 2011

Physics
use the face that the speed of light in a vacuum is about 3.00 x10^8 m/s to determine how many kilometers a pulse from a laser beam travels in exactly eighteen hours
September 8, 2011

physics
that's what i did but the computer is telling me it's wrong
September 7, 2011

physics
A flowerpot falls from a window sill 37.6 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2. Answer in units of m/s Please show me the formula and steps i would use to solve this, Thanks!
September 7, 2011

College Calculus
The graph A(x) has points (-3,0), (0,-2), (1,0) and (2,3). If C(x) is defined by C(x)=A(2x+3), then what is the domain and range of C and how would the graph of C(x) look like? Also, is there any way to find what the actual equation of A(x) is with the points listed above? ...
September 7, 2011

physics
few
September 7, 2011

Calculus
find the limit of ((sqrt(x+4))-2)/x as x approaches 0.
September 6, 2011

physics
A driver of a car traveling at 16.7 m/s applies the brakes, causing a uniform deceleration of 2.5 m/s2. The first question is - How long does it take the car to accelerate to a final speed of 13.9 m/s? For this i got 1.12 and that's correct. The second question is - How ...
September 6, 2011

Math
The Transitive Property states that if a = b and b = c , then a = c. Explain how you can use the Transitive Property to show that the expressions 0+x+13 and 13+x are equivalent.
September 6, 2011

Calculus
The graph A(x) has points (-3,0), (0,-2), (1,0) and (2,3). If C(x) is defined by C(x)=A(2x+3), then what is the domain and range of C and how would the graph of C(x) look like? Also, is there any way to find what the actual equation of A(x) is with the points listed above? ...
September 6, 2011

physics
A toboggan is sliding down a snowy slope. The table shows the speed of the toboggan at various times during its trip. (a) Make a graph of the speed as a function of time. (b) Judging by the graph, is it plausible that the toboggan’s acceleration is constant? If so, what ...
September 6, 2011

Physics
A drag racer crosses the finish line of a 400.0-m track with a final speed of 104 m/s. (a) Assuming constant acceleration during the race, find the racer’s time and the minimum co efficient of static friction between the tires and the road. (b) If, because of bad tires or...
September 6, 2011

physics
An airplane of mass 2800 Kg has just lifted off the runway. It is gaining altitude at a constant 2.3 M/s while the horizontal component of its velocity is increasing at a rate of 0.86 M/s2. Assume g= 9.81 M/s2. (a) Find the direction of the force exerted on the airplane by the...
September 6, 2011

algebra
solve the elimination method 7r-3s=0 3r+7s=58 what is the solution of the system
September 6, 2011

Challenger institution of technology
An airplane of mass 2800 Kg has just lifted off the runway. It is gaining altitude at a constant 2.3 M/s while the horizontal component of its velocity is increasing at a rate of 0.86 M/s2. Assume g= 9.81 M/s2. (a) Find the direction of the force exerted on the airplane by the...
September 5, 2011

physics
A rocket burnt fuel av the rate of 20kgs^4 and eject it with a velocity of 5.0*10^3ms^-1. Calculate the thrust exerted by the gas on the rocket.
August 31, 2011

chemistry
Can you explain the electron configuration for the transition metal ions?
August 30, 2011

chemistry
The first five successive ionisation energies of an element are 0.807, 2.433, 3.666, 25.033, 32.834 MJ mol–1 . Which one element from those listed below could this element be? (A) B (B) C (C) N (D) O (E) F
August 30, 2011

Science
Can someone please help me with these questions below. Extinction is a natural selection process. Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?
August 30, 2011

chemistry
what is the mass of 20mL of a solution that has a specific gravity of 1.69
August 30, 2011

Writing
Im wondering about citing a book in a paragraph basically would i just put Last name, Firstt name. title. edition. city: publisher, year.? Do I also need to include like what page numbers I exactly took it from and do i just throw this at the end of the essay by that i just ...
August 30, 2011

Physics
I don't understand any thing about the centripital force and torque please HELP me to solve problems about this topics.
August 29, 2011

Physics
I don't understand anything about the centripital force and torque please HELP me to understand hoe to solve problems relsted to this topics,
August 29, 2011

Physics
I don't understand anything about the centripital force and torque please HELP me to understand hoe to solve problems relsted to this topics,
August 29, 2011

Physics
I don't understand anything about the centripital force and torque please HELP me to understand hoe to solve problems relsted to this topics,
August 29, 2011

physics
a)s=vt so t=s/v t=18.3m/12.2ms=1.5s the same is for the other so t1=1.5s & t2=1.5s so t1-t2= 1.5s-1.5s=0
August 29, 2011

Math
For the question below can you please help explain why this survey question might lead to an erroneous conclusion thank you. SURVEY QUESTION: “Do you think that it is not important to give extra tutoring to students who are not failing?
August 27, 2011

Math
“Vitamin E is a proven antioxidant and may help in fighting cancer and heart disease.” Is there anything ambiguous about this claim? Can someone please help and give me a detailed answer for this problem Thank you.
August 27, 2011

Calculus
jk jk. dont quit
August 27, 2011

Calculus
you must be pretty damn stupid amanda. is suggest you quit school
August 27, 2011

Statistics
Transactional data can be used to partition a customer base into different ‘segments’ based on predominant purchasing patterns. Typical segments might be ‘convenience shoppers’ (customers who buy a lot of ready meals, pizzas, etc.), ‘cooking from ...
August 26, 2011

math
use the numbers 3,5,6,2,54, and 5 in that order to write an expression that has a value of 100
August 24, 2011

6th grade math
125
August 24, 2011

physics
A school bus takes 0.55 h to reach the school from your house. If the average velocity of the bus is 17.1 km/h to the east, what is the displacement?
August 23, 2011

Calculus
A manufacturer determines that the profit derived from selling x units of a certain item is given by: P = − 2x^2 +800x Find the marginal profit for a production of 20 units. Also, The demand function for a particular commodity is given by: p = 400− 4x . Find the ...
August 23, 2011

6th gr,ade math
5/20
August 22, 2011

MATH
Can anyone please help me with this? Can anyone please build or generate at least five Pythagorean Triples using one of the many formulas available online. Then After building the triples, verify each of them in the Pythagorean Theorem equation. Thank you so very much.
August 19, 2011

math
Give a number to the thousandths place that is greater than 7.2 but less than 7.3.
August 15, 2011

math
Give a number to the thousandths place that is greater than 7.2 but less than 7.3.
August 15, 2011

Chem 121
how do I calculate error analysis on my tritation expirement?
August 15, 2011

Math
Can you please help me select at least five numbers; 0 (zero), two even, and two odd numbers and do a simple substitution of number for variable in a formula. And can you explain each step and show the work on how you came up with the answer please thank you.
August 14, 2011

Physics 1 (college)
I dont understand where you got .1 and then -1 from. Can you explain that?
August 8, 2011

Math
Can you please explain step by step on how to do each of these two problems below? And then tell me whether it involves an arithmetic sequence or a geometric sequence I also need the work shown out for both problems thank you. 1). A person hired a firm to build a CB radio ...
August 7, 2011

Math
Can you please explain step by step on how to do each of these two problems below? And then tell me whether it involves an arithmetic sequence or a geometric sequence I also need to show the work on both problems thank you. Perform the indicated operations 1010 two × 101...
August 7, 2011

Math
Can you please explain step by step on how to do each of these two problems below? And then tell me whether it involves an arithmetic sequence or a geometric sequence I also need the work shown out on both problems thank you. Perform the indicated operations and reduce the ...
August 7, 2011

math.
If x>0 and x=5y, then square root of x^2-2xy+y^2 is..
August 2, 2011

statistics
Would it be unusual for the mean of a sample of 3 to be 115 or more?
August 2, 2011

verbs
What's your question..
August 2, 2011

math
if f(x)= 5x+7 and g(x)=x^2-2 write the functions a. (fxg)(x) b. f(g(x))
August 1, 2011

calculus
For any divergence especially with trig definitions in infinite series you will want to make sure that you can prove it to something. Comparison test or limit comparison works really well just remember that the sine function is only good from -1 to 1
August 1, 2011

history
What problems had to be overcome Africa's interior could be opened up to Westeren explorers? what helped to over come these problems?
July 30, 2011

chem
if the saturation of carbon is 12 and nitrogen is 6 what is the tempature of 200ml in 450 g containers in parts per million
July 29, 2011

calculus
How do I solve 3xy^3dy/dx=y^2x^2+5x^3y+y^4
July 28, 2011

maths
how do I solve 3xy^3dy/dx=y^2x^2+5x^3y+y^4
July 28, 2011

Physics
Assume this: The Earth rotates exactly around N and S poles, Earth is perfect sphere, and do not count the Earth's orbit around the sun. HINT: Ө = d/r, where Ө is in radians...and circumference = 2πr
July 26, 2011

Algebra
The percent decrease from 5 to 4 is how much less than the percent increase from 4 to 5? A. 0% B. 5% C. 15% D. 20% E. 25%
July 26, 2011

Pre-Calc
Vector v is (4√3,√3). Find the angle between v and i.
July 25, 2011

Math
No, again 168 is the total. So if you take 168-117(Which is the odds for winning) you get 51. So your odds against winning are 51/168
July 22, 2011

Math
17 out of 214. 79%. 17:214 is read like a fraction again. So if you divide 17/214 you get 79%. Not sure what exact answer you're looking for. But hopefully this can get you started.
July 22, 2011

Math
Again write it as a fraction... The total is 1 because you are looking at the chances of seeing 1 moose. Therefore to find the probability of not seeing a moose you need to take 1-.37 which is .63 so your probability of not seeing a moose is: .63/1
July 22, 2011

Math
You write it as a fraction. (How many students preferred supreme)/(Total college sophomores) 7/23 and that is already reduced.
July 22, 2011

introduction to computers
Which of the following search terms would direct terms would direct search engine to find pages about the windows vista operating system? 1"windows vista"2windows vista 3"windows""vista"4 "windows" vista
July 19, 2011

criminal similation
what is criminal similation
July 18, 2011

math
Given the funtion G(t) = t2 - 7t + 5, evaluate G(-1+h)-G(-1)/h
July 16, 2011

Math: Parabola, Vertex
Find the vertex of the parabola associated with the quadratic function. f(x)= -1/7x^2 - 2/11x + 1/121 (h,k)= What is the vertex of this quadratic function?
July 13, 2011

statistics
A bus company official wanted to estimate the mean time for the trip between two cities. A random sample of such trips gave a mean of 152 minutes and a standard deviation of 12 minutes. Construct a 98% confidence interval for the population mean time.
July 9, 2011

Tamucc
A 51kg object connected to a spring of 31N/m spring constant oscillates on a horizontal, frictionless surface with amplitude of 5cm. Find the speed of the object when when its position is 3cm.
July 7, 2011

physics
the acceleration is not right. you need to use this equation: Xf=Xi+Vi*t+(1/2)a*t^2 Xi=0,Vi=0,t=1.4,Xf=1,a=? 1=0+0(1.4)+(1/2)a(1.4^2) 1(2)= a(1.96) 2/1.96= a 1.0204 = a Then you follow the rest of the equation T = m(g+a)
July 3, 2011

physics
A block of mass 35 kg moves on the horizontal surface. If initially at rest whwat is the speed of the block after moving a distance of 6m when G=32?
July 3, 2011

Trigonometric Substitution
Trigonometric Substitution a. Explain why the substitution x = asin(Theta) guarantees that cos(Theta) is greater than or equal to 0 . b. What sort of restriction must we put on x and a so that the substitution x = asec(Theta)will guarantee that tan(Theta) is greater than or ...
June 28, 2011

algebra
Describe in your own words how to solve a linear equation using the equality properties. Demonstrate the process with an example. Next, replace the equal sign in your example with an inequality by using the less than or greater than sign. Then solve the inequality.
June 27, 2011

Spainish
What is the correct answer to the question: ¿Qué haces los sábados?
June 23, 2011

geometry
Solve the following equation for x 3x + 23 = 7
June 22, 2011

calculus ( related rates )
a paper cup in the shape of a cone has a diameter of 10cm across the top, and is 8cm deep. if the cup is leaking out the bottom at 2pi cm^3/min, at what rate is thet area of the water surface ( only the top surface of the water) changing, when the cup has a the water depth of...
June 22, 2011

Physical Science 2
Given that iron has a density of 7.87 g/cm3, calculate the volumeof 100 g of iron and 50 g of iron
June 21, 2011

Chemistry
The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.500. If a trial's absorbance is measured to be 0.310 and its initial concentration of SCN– was 0.0010 M, the equilibrium ...
June 20, 2011

CIS 115
There are three seating categories at a stadium. For a softball game, Class A # seats cost $15, Class B cost $12. and Class C seats cost $9. Design a modular # program that asks how many tickets for each class of seats were sold, and then # displays the amount of income ...
June 20, 2011

English
Can you identify key qualities of drama and poetry which emphasize their performative qualities.
June 16, 2011

Physics
Two 0.33 kg blocks are attached to a 1.62m long string such that the lengths of the three string segments are equal. The ends of the string are attached to the ceiling at points separated by 1m. Each segment is 0.54m long. What is the tension in the horizontal segment. Answer ...
June 16, 2011

financial management
The HighT Company is a manufacturer of electronic products. The company is preparing a financial plan for the coming year and has the following independent projects under consideration: Project Initial investment ($ millions) Internal rate of return (%) A 220 20 B 380 11 C 300...
June 16, 2011

English
Can you help me summarize the major similarities and differences between the forms of the drama " Riders to The Sea",The poem " We Real Cool",and the short story "The Secret Life of Walter Mitty" and help me with at least one textual example of ...
June 15, 2011

English
How is the more direct performative aspect of drama and/or poetry reflected in these forms? structure, language, technique, and style
June 15, 2011

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