Sunday

February 14, 2016
Total # Posts: 303

**Math,statistics**

The sum of 16 reciprocals (1 over the number) is found to equal 4. What is the harmonic mean of the original (i.e., non-reciprocated) scores?
*October 9, 2012*

**Math,statistics**

The sum of 16 reciprocals (1 over the number) is found to equal 4. What is the harmonic mean of the original (i.e., non-reciprocated) scores?
*October 9, 2012*

**Physics**

On a playground slide, a child has potential energy that decreases by 1000 \rm J while her kinetic energy increases by 900 \rm J. What other form of energy is involved, and how much?
*September 28, 2012*

**Math**

The perimeter of a square is f feet. How long in yards is each side of the square?
*September 26, 2012*

**Math**

A number that can be divided by 2 three times in a row with no remainder, has 5 as a factor and is greater than 40
*September 25, 2012*

**Psychology**

Where are selfish impulses? Examples of social conscience?
*September 13, 2012*

**physics**

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps. A grocery cart has a mass of 30kg. The coefficient of friction is .10. Assume that the shoppers will push the cart ...
*September 11, 2012*

**Math**

x is to 6 as 0.8 is to 1.5 How do I write a proportion with that? (proportion such as eg. 14/105=x/315) is it x/6=0.8/1.5 or is it x/0.8=6/1.5 Urgent!!
*September 11, 2012*

**7th G-Math**

a is the answer -9/-3 is 3 any negative divided by another negative is always a positive the -9+(-3) so it is -9-3 -9-3=-12
*September 11, 2012*

**math**

the value is 46 any thing in side the absolute values sign (| |) turns postive
*September 10, 2012*

**math**

y – (–19) = 25 negative and negative is positive y+19=25 now you want to get y all alone and anything flipped to the other side of the equals sign changes. so positive numbers turn negative as negative turn positive y=25-19 y=6 thats your answer!
*September 10, 2012*

**5th grade math**

0.33 is more. The less numbers a decimal has the more it is and then and the smaller the decimal, the larger.
*September 4, 2012*

**6th grade math**

13/16-1/4 you need to change 4 into 16. 4*4 is 16 so now it is 13/16-4/16 13-4=9 so it is 9/16
*September 4, 2012*

**Essay**

The best birthday party we ever celebrated
*June 30, 2012*

**statistics**

Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both during breast feeding...
*June 28, 2012*

**6th Geography**

Correct
*May 9, 2012*

**Algebra**

x2 - 5x + 5 = 0
*April 29, 2012*

**statistics**

The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years what percentage of individual aircraft have ages greater than 15 years assume that a random sample of 49 aircraft is selected and the mean age of the sample...
*April 24, 2012*

**math**

The demand function for a certain commodity is approximated by: p = 100e-q/2where "q" is the number of units demanded at a price of "p" dollars per unit. If there is no demand for the product, what will its price be(in dollars)?
*April 3, 2012*

**math**

Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank. 2x - 3y = 1; x + 2y = 4
*April 3, 2012*

**Chemistry**

Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following. (a) the initial solution (b) the point at which 80 mL of the base has been added (c) the equivalence point (d) the point at which 105 mL of the base has ...
*March 17, 2012*

**Chemistry**

Calculate whether or not a precipitate will form if 1.30 mL of 0.80 M NH3 are added to 2.2 L of 1.0 10-3 M FeSO4. Calculate Q.
*March 16, 2012*

**math**

solve and check each of the following quadratic equation (1)x^2+16x=36 (2)x^2=10x-16 (3)3x=x^2-4
*February 16, 2012*

**help math**

solve each of the following quadratic equation (1)x^2=5x+6 (2)x^2+9x=10
*February 15, 2012*

**help in math**

solve and check each of the following quadratic equation (1) x^2=6x (2) x^2=3x (3)x^2=17x (4) x^2=5x+6 (5) x^2+9x=10
*February 15, 2012*

**quadratic equation**

solve and check each of the following quadratic equation (1)x^-9x=0 (2)x^+8x=0 (3)x^=6x (4)x^=-3x
*February 15, 2012*

**quadriatic equation**

solve and check each of the following quadratic equation (1)x^+x-6=0 (2)x^+8x+15=0 (3)x^+2x+1=0 (4)x^-3x-4=0 (5)x^-4x-32=0
*February 15, 2012*

**math**

wats the positive root of the equation x^-3x=10?
*February 15, 2012*

**chemistry**

how many grams of hydrogen are produced if you have 120 grams of sodium? 2Na+2H2O->2NaOH+H2
*February 13, 2012*

**Algebra 1**

not enough mathematical equation to answer your question but u can solve it by using a graph.....
*February 8, 2012*

**quadratic equation**

what's the positive root of the following equation x(square)=7x+8
*February 8, 2012*

**solving algebraic equation **

a movie theater charges $9 for an adults ticket and $5.00 for a child ticket. on a recent night the sale of child's tickets was two times the sale of an adults tickets. if the total amount collected for ticket sales was not more than $3800 what is the greatest number of ...
*February 8, 2012*

**solving algebraic equation **

For college orientation week,Mike sold 200 shirts.sweat shirts were priced at $50.00 each ant t-shirts at $20.00 each Mike recieve a total of $6250.00 for the shirts. How many type of shirt dud Mike sell for college orientation week ?please help and show a equation to solve
*February 8, 2012*

**algebraic equation and inaqualities**

in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X
*February 6, 2012*

**algebra**

the sum of two adjacent angle is 80°the larger angle is 8°less than 3 tines the smaller find the number of degrees in each angle
*February 5, 2012*

**algebra verbal linear equation**

Allison has a square root flower garden and Lauren has a rectangular flower garden the width of the rectangular garden is 2 yards less than a side of the squaare garden and the length of the rectangular garden is 5 yards more than a side of the square garden if the sum of the ...
*February 5, 2012*

**maths **

Christopher has cut three pieces of string to three kites.two pieces are equal length. rhw third pieces is one half of the lenght of each of the others. he cut out the three pieces from a roll of string 70 meters long without any String left over.Find the number of meters of ...
*February 5, 2012*

**verbal linear equations **

a taxi costs $2.75 for the first quarter of a mile and $0.85 for each subsequent quarter mile.A ride that cost $23.15 is how many miles longer than a ride that costs $17.20?(please i don't want example show me how u work it out )
*February 5, 2012*

**Physics**

here's the first part: deltaV=4.67μC/m2*(d/8.85E-12) and it should be somewhere over 1000 volts. good luck with the second part, I still don't know it.
*February 1, 2012*

**algebra**

3a+5b=4 4a+3b=2 find a and b please
*January 31, 2012*

**algebra**

find x and y 5x-3y=-4 3x+2y=9
*January 31, 2012*

**indruction to business**

strategy to displease a customer
*January 26, 2012*

**High Point **

a sign is in the shape of rhombus with a 60 degree angle and sides of 9cm long. Find its are to nearest tenth?
*January 24, 2012*

**Chemistry :/**

A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 mL of 0.1063 M HCl to reach the bromocresol green end point. Find the weight percent of NH3 (FM 17.031) in the cleaner.
*January 23, 2012*

**History **

what were the roman laws called that applied to all citizens in the roman empire
*January 7, 2012*

**Math--Please Help!!**

Auto parts dept. sends out a mean of 6.3 special orders daily. What is the probability that, for any day, the number of special orders sent out will be at least 4?
*December 19, 2011*

**physics**

A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10 6 m.Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11N · m2/kg2
*December 11, 2011*

**physics**

In introductory physics laboratories, a typical Cavendish balance for measuring the gravitational constant G uses lead spheres of masses 1.79 kg and 16.9 g whose centers are separated by 5.49 cm. Calculate the gravitational force between these spheres, treating each as a point...
*December 10, 2011*

**physics**

A satellite moves in a circular orbit around the Earth at a speed of 6.1 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal ...
*December 10, 2011*

**physics**

A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10^6 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10^−11N · m2/kg2. Answer ...
*December 10, 2011*

**physics**

A model airplane of mass 0.7 kg is attached to a horizontal string and ﬂies in a horizontal circle of radius 5.6 m, making 1.6 revolutions every 7 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the plane.) The ...
*December 10, 2011*

**physics**

An air puck of mass 0.33 kg is tied to a string and allowed to revolve in a circle of radius 1.12 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 1.1 kg is tied to it. The suspended mass remains ...
*December 10, 2011*

**Chemistry**

What is the value of Kp for the reaction: NO2(g)+CO(g)->NO(g)+CO2(g) Given the following information: 2NO2(g)->NO3(g)+NO(g) Kp=2.72x10^(-4) 2NO2(g)+2CO2(g)->2NO3(g)+2CO(g) Kp=5.73
*November 27, 2011*

**Math**

Got it. 4/5 is the answer. I'm making this probability problems harder than it should be. Thanks!
*November 19, 2011*

**Math**

I need help with the second question: A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? Answer is 1/5 What is the probability that the student will answer...
*November 19, 2011*

**Math**

I'm not sure of the second question. I understand the 1/5 chance of answering correctly but I'm not sure of the probability of answering incorrectly. Would it be 1 - 1/5?
*November 19, 2011*

**Math**

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question incorrectly?
*November 19, 2011*

**statistics**

A student is taking a multiple choice exam. There are five possible answers for each question. What is the probability the student will answer the first question correctly? What is the probability that the student will answer the first question incorrectly?
*November 19, 2011*

**Math**

A car dealer carries out the following calculations. What is the annual percentage rate? (Round your answer to the nearest tenth.) List price $ 5,368.00 Options $ 1,625.00 Destination charges $ 200.00 Subtotal $ 7,193.00 Tax $ 431.58 Less trade-in $ 2,932.00 Amount to be ...
*November 2, 2011*

**GEOGRAPHY**

According to the estimate in 2001 which country ranks first in population then second then third?
*November 1, 2011*

**American History**

Which is most accurate regarding the American political climate between 1876 and 1896?
*October 29, 2011*

**English**

Based on what you know about him so far, describe Jim. What kind of a man is he? Why is he the kind of man he is?
*October 25, 2011*

**English**

Describe the role that Huck’s conscience plays in the first half of Twain’s novel.
*October 25, 2011*

**english**

How does the issue of slavery become a concern in Huck's life? How does Huck deal with this controversial issue?
*October 25, 2011*

**english**

How does Huck display imagination, intelligence, creativity, and a sense of humor in the first half of Twain’s novel?
*October 25, 2011*

**English**

Identify and describe Huck’s opinions of “sivilization,” education, and religion.
*October 25, 2011*

**cja 105**

Chief Draper has noticed that the behavior of many of his officers reflects a lack of understanding of many basic criminal justice concepts. Last week, he received a complaint about a patrol officer with ten years of experience on the force. The complaint alleged that the ...
*October 10, 2011*

**spanish **

do anyone have the answer for penn foster exam 38981200 part 4 comprehension
*September 26, 2011*

**spanish **

do anyone have the answer for penn foster exam 38981200
*September 26, 2011*

**physics**

a cylinder of diameter 1cm at 30degree celcius is to slid into a hole on a steel plate. the hole has a diameter of 0.9997 cm at 30 degree celcius. to what temperature must be the plate be heated when steel has the alpha 1.1X10^-5/degree celcius
*September 2, 2011*

**Literacy 2**

where would you check the definition in the book.
*August 23, 2011*

**Finance**

a corporation had year end 2004 and 2005 retained earnings balances of $320,000 and $400,000, respectively. The firm reported net profits after taxes of $100,000 in 2005. the firm paid dividends in 2005 ofwhat
*August 11, 2011*

**statistics**

(714+751+664+789+818+779+698+836+753+834+693+802)/12 = 760.97 Answer: No, 760.97 does not equal to 678 Add all numbers then devide by the number of the above numbers (we have 12 in total) and that will give you a mean.
*August 7, 2011*

**Math**

write the logarithmic equation in exponential form log0.001=-3
*August 4, 2011*

**General Education Statistics | MAT112**

There are many ways people can invest their money. In mutual funds, the investor buys shares in a fund that buys investment instruments for the investor, commonly stocks, bonds, or fixed instrument investments. Investment fund managers commonly advertise their success in ...
*July 30, 2011*

**averages**

if you had the nos 3,19,20,37,48 out of 50 on another draw what. Would the results of another draw be
*June 11, 2011*

**math **

Trying to solve the number 91 how 1,3,4,6 can be used once using add,sub,mult,divide and symbols
*April 22, 2011*

**Chemistry**

How do I find the pH of pure neutral H2O at o degrees celsius by using standard enthalpies and standard entropies
*April 21, 2011*

**soc 110**

a. In urban areas across our country, identify at least three technologies that Americans have become dependent upon in their daily lives. b. Using the technologies that you described in (a), discuss at least one advantage and one disadvantage that people in large cities ...
*April 15, 2011*

**Finance**

What is a significant disadvantage of the payback period? a. does not properly consider the time value of money, b. Is complicated to explain, c. Increase firm risk, or d.Provides a measure if liquidity.
*March 24, 2011*

**Spanish **

spanish exam 38981200 comprehension
*March 23, 2011*

**computer programming**

Design a program that asks the user to enter a nonegative integer and then display the factorial of that number- it can be a flowchart or pseucode
*March 18, 2011*

**PHYSICS**

Two objects are connected by a massless string as shown in the figure below. The pulley is massless and rotates without friction. The object of mass m = 1.7 kg slides without friction on an inclined plane which makes an angle of è = 38° with the horizontal. The ...
*March 17, 2011*

**PHYSICS**

A proton is traveling to the right at 231 km/s. It has a head-on perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton, what is the speed of proton after the collision?
*March 17, 2011*

**math**

Two events are _________ if the outcome or occurrence of the first affects the outcome or occurrence of the second so that the probability is changed. Please Help Me . !
*March 8, 2011*

**Business**

Which economic system is the best solution for handling a crisis of epic proportion?
*March 6, 2011*

**College Math 3**

Lisa will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of $53.98 and costs an additional $0.15 per mile driven. The second plan has an initial fee of $67.98 and costs an additional $0.10 per mile driven. How many miles would ...
*March 4, 2011*

**Business/Economics**

What is strengths and weaknesses regarding monetary polcies, and how is related to treasury bill and note rates?
*March 2, 2011*

**Business/Economics**

As regards to federal reserve what is the success in the cost and availability of credit today? and what could be handled differently?
*March 2, 2011*

**computers**

What are contributing factors if you were in the market for commercial paper prior to a final purchase?
*February 24, 2011*

**Computer class**

how do I design a program using a flowchart, the program needs to compute state and county sales tax? It is suppose to compute it once the user enters amount of purchase
*February 21, 2011*

**MA 132**

what numbers make up the mode and mean of 80 and a median of 85?
*February 12, 2011*

**statistics**

GMAT and GPA Scores for 12 MBA Students Compute the covariance and the determination and interpret your findings. GMAT- 599 689 584 631 594 643 MBA GPA- 9.6 8.8 7.4 10.0 7.8 9.2 GMAT- 656 594 710 611 593 683 MBA GPA- 9.6 8.4 11.2 7.6 8.8 8.0
*January 31, 2011*

**geography**

wracking the internet 4 another one.... what's the highest mountain range in the mid east?
*January 18, 2011*

**geography **

is the answer sea of Marmara,Aegean Sea, Meditteranean Sea, Red sea, Persian Gulf, gulf of Oman and the Arabian Sea? thanx
*January 18, 2011*

**geography**

which 7 bodies of water do you pass through in order to get to Abadan from Istanbal by ship
*January 18, 2011*

**math**

Given the expression (3s-4)(4s+5), explain in words the steps taken to completely simplify the expression
*January 16, 2011*

**math - statistics**

Football team makes in average 2 touchdowns per game. Use Poisson distribution to find probability that this team will make 5 touchdowns in the next 3 games (adjust ë) Tip: use Poisson Appendix Table or Excel function Poisson(x, ë, false) for x=5 and ë = 2*3 = 6...
*December 4, 2010*

**statistics - math**

Sixty percent of the students at a particular community college are female. If 13 students at that community college are selected at random, find the probability that 5 or 6 students will be female. Use Appendix Table or Excel function for Binomial distribution. [Remember from...
*December 4, 2010*

**statistic**

Quiz has 6 questions. Each question has five possible answers, only one of each 5 answers is correct. If student randomly guesses on all six questions, what is the probability to answer 2 questions right? Tip: first, you have to define parameters of Binomial distribution: n - ...
*December 4, 2010*