Monday

December 5, 2016
Total # Posts: 1,654

**physics- please help**

Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm . What was the magnitude of the average force applied by the ball on the glove? question #2 How much tension must a rope withstand if ...

*April 29, 2012*

**physics- please help**

World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2 . Part a)How much horizontal force F must a sprinter of mass 60kg exert on the starting blocks to produce this acceleration? express your ...

*April 29, 2012*

**LA i think?**

I am doing this homophone extra credit sheet and if my paper is in first i will get 50 points extra credit. I have only 3 left out of the 43. Can you please help? 1. To cut candies in small pieces 2. A just - born antelope 3. To tie a bow with one's toes The last one makes...

*April 23, 2012*

**not for school**

Hi I'm writing a story and I had a question. I am saying that one person has to jump across this... well it is kind of a pit of doom... no ending... into eternal darkness... but anyways I need to know how far the average human can jump if they have a 3ft running start. I ...

*April 18, 2012*

**English**

The Modern Drama collection theme is Opening Doors. Discuss examples of the ways in which doors and keys are used as symbols in The Miracle Worker. Make at least two references to specific details in the play to support your ideas.

*April 16, 2012*

**math**

mode is the number that shows up the most and if there's no numbers that show up at least twice then there is NO mode

*April 9, 2012*

**math**

Do 3x^2-7x+2=0 verify that the sum of the solution is -b/a and verify that the product of the solution is c/a

*April 8, 2012*

**Organic Chemistry **

calculate how much of 10% aqueous sodium carbonate would be required to neutralize the solution (This is during the preparation of benzocaine)

*April 3, 2012*

**english**

Good job! You did great :) God bless

*April 2, 2012*

**Geom./Trig.**

an airplane flies directly overhead at 540mph. 1 minute later is seen at an angle of elevation of 34 degrees. how far did the airplane fly during that time? what is the elevation of the plane?

*March 28, 2012*

**Geography**

0-19 Somewhere country 51.80 20-59 103.40 60 older 40.90 Elsewhere county 0-19 99.90 20-59 89.60 60 older 10.30 would this work better....

*March 20, 2012*

**Geography**

only my brother is home tonight and he said he could not help me.....i am supposed to write a page about his by tomorrow - my partner will be mad and disappointed that i don`t get this and i was embarrased to tell her i did not understand any of it. I missed a whole week of ...

*March 20, 2012*

**Geography**

can you help me alter the percentages so that this makes sense..

*March 20, 2012*

**Geography**

what should my percentages be then...i am so confused on this

*March 20, 2012*

**Geography**

yes......

*March 20, 2012*

**Geography**

we were asked to compare two countries using a chart: children and youth (age 0-19) Working adults (age 20-59) and Seniors (age 60 and older) we were then asked to identify the developed and the developing countries and make predication on the following questions: education ...

*March 20, 2012*

**Geography**

we were asked to make a chart with 2 counties called somewhere and elsewhere.....we had to identify the developed and the developing countries and make a prediction about what our country`s needs will be in ten years from the date of the population date for each of the ...

*March 20, 2012*

**Geography**

need help predicting what should be done to prepare each of our two countries for education for young people, Infant care for young mothers, Home construction for growing families, and Medical care for seniors. Age group for each: 0-19 -25.90, 20-59 -51.70 and 60 Seniors - 20....

*March 20, 2012*

**math-Probability**

In a certain manufacturing process the probability of a type I defect is 0.21, the probability of a type II defect is 0.31, and the probability of having both types of defects is 0.01. Find the probability of having neither type of defect.

*March 16, 2012*

**math-Probability**

Let E and F be events such that the following is true. Pr (E) = 0.26, Pr (F ' ) = 0.61, Pr (E F) = 0.61 What is Pr (E ∩ F)?

*March 16, 2012*

**Math-Probability**

Michael is one of eight contestants entered in three races to be run on a eight-lane track. If in each race the runners are assigned to the lanes at random, what is the probability that Michael will be assigned to the inside lane at least once?

*March 16, 2012*

**math-Probability**

Without consultation, each of four organizations announces a one-day convention to be held during July. Find the probability that at least two organizations specify the same day for their convention.

*March 16, 2012*

**math-Probability**

In a classroom of children (10 boys and 8 girls), six students are chosen to go to the blackboard. What is the probability that no boys are chosen?

*March 16, 2012*

**Math-Probability**

An urn contains four red balls and three white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?

*March 16, 2012*

**math-probability**

A factory produces fuses, which are packaged in boxes of 17. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of these three fuses is defective. What is the probability that a box containing two defective fuses will be ...

*March 16, 2012*

**math-probability**

Eleven white socks and six red socks are in a drawer. If two socks are selected at random, what is the probability that both socks are the same color?

*March 16, 2012*

**Math-Probability**

A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

*March 16, 2012*

**Pre-Calc**

The radius would then be 3,979 miles

*March 16, 2012*

**Math**

Determine the equation for the following: The line with x-intercept of 4 and y-intercept of 2

*March 13, 2012*

**Math**

Ok so I have this word problem that I can't figure out. Help please!! Sandra is trying to use her old cell phone to call her best friend. She can be no more than 3 miles from a tower in order to get a signal for her phone. If the telephone tower is 252 feet tall, find the ...

*March 12, 2012*

**Physics**

A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3.3 kg weight is hanging on the string. The system of the weight and disk is released from rest. When the 3.3 kg weight is moving with a speed of 2.1 m/s, what is the kinetic energy of the ...

*March 12, 2012*

**Physical Science**

An athlete wants to finish a 5K face in 25 minutes. If she runs at a constant speed of 3.4 m/s, will she meet her goal?

*March 4, 2012*

**Decimal division**

I would write 0.7/0.0035=200.0

*March 1, 2012*

**Math**

If you start with a number, subtract 14, then divide by 12, the result is 248. What was the original number?

*March 1, 2012*

**math**

Its closer to the 7

*February 28, 2012*

**math**

The time is 6:10 Is the hour hand closer to the 6 or 7 and why?

*February 28, 2012*

**CHEMISTRY**

Thank you! For the second question could you tell me how to find the answer?

*February 23, 2012*

**CHEMISTRY**

The following reaction represents the decomposition of hydrogen peroxide: Balanced equation: 2H2O2 -> O2 + 2H2O How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide? How many molecules of O2 are produced? For the second question, is the ...

*February 23, 2012*

**Maths**

a saturated solution of salt X contain0.28g of the salt in 100cm3 of solution at 25degree centigrate, what is the solubility of the salt X at this temperature (R.m.m of X=56)

*February 15, 2012*

**Us history**

I need help writing a thesis statement for "specific problems or injustices present in American life in late 1800 and early 1900" and then the reforms that attempted to address them

*February 2, 2012*

**math**

i have 250 and my brother has 150 find the ratio of my brother money to mine

*January 31, 2012*

**Alg 1**

You have 60 megabytes of space left on your portaable media player. You can choose to download song files that use 3.5 megabytes or video files that use 8 megabytes. You want to download at least 12 files. What is a graph showing the numbers of songs and video files you can ...

*January 30, 2012*

**alg 1**

It takes a florist 3 hour and 15 minutes to make 3 small centerpieces and 3 large centerpieces. It takes 6 hours and 20 minutes to make 4 small centerpieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? write and ...

*January 30, 2012*

**Alg 1**

The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from the haircuts were $750. How much does the owner charge for a haircut? Solve by writing and solving a system ...

*January 30, 2012*

**Math**

How do you get 3.75 m from 3.8 m

*January 22, 2012*

**Pre-Calc B**

How do I find zeros on a graph of a cubic function? I can tell that two of the zeros are -4 and 3 because they show on the graph, but how do I find the other?

*January 20, 2012*

**math**

Loan #1 Year Amount owed 1 $3796 2 $3942 3 $4088 Loan # 2 Year Amount owed 1 $977.53 2 $1036.18 3 1098.35 For loan #1 is simple interest. Loan #2 is compound interest How much was each loan originally Determine the future value of each loan after 10 years

*January 19, 2012*

**math**

Sally invests some money at 65%/a compounded annually. After 5 years . she takes the principal and interest and reinvests it all at 7.2%/a compounded quarterly for 6 more years. At the end of this time, her investment is worth $ 14 784.56 . How much did Sally originally invest

*January 18, 2012*

**math**

Bernie deposited $ 4000 into an account that pays 45%/a compounded quarterly during the first year. The interest rate on this account is then increased by 0.2% each year. Calculate the balance in Bernie's account after three years

*January 18, 2012*

**math**

Vlad purchased some furniture for his apartment. The total cost was $ 2943.37. He paid $ 850 down and financed the rest for 18 months. At the end of the finance period .Vlad owed $ 2147.28 . What annual interest rate, compounded monthly , was he being charged ? Round your ...

*January 18, 2012*

**Biology**

15.8 ml = how many Liters

*January 17, 2012*

**physics**

A 0.190 kg projectile is fired with a velocity of +705 m/s at a 2.00 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it, is +40.0 m/s. Find the velocity with which the projectile exits from the block.

*January 17, 2012*

**billing and coding**

why is a present on admission indicator used?

*January 13, 2012*

**billing and coding**

what is a POA indicator used?

*January 13, 2012*

**penn foster**

billing and coding present-on-admission indicators

*January 13, 2012*

**penn foster**

what is a POA unducator? How and when are they used

*January 13, 2012*

**Math**

Solve for x: x^4-15X^2+14=0 How would I solve this problem? Could someone please show me the steps?

*January 10, 2012*

**Math**

Solve for x: x^4-15X^2+14=0 How would I solve this problem?

*January 10, 2012*

**Math ( i have no clue )**

Solve For P. -p+14.1-(12-4)=6.3

*December 29, 2011*

**physics**

62.2

*December 19, 2011*

**chemistry**

Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 3.45 g of hexane is mixed with 16.3 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be sure your answer has the...

*December 6, 2011*

**physics**

a ball of mass 0.4 kg is initially at rest on the ground. It is kicked and leaves the kicker's foot with a speed of 5 m/s in a direction of 60 degrees above the horizontal. What is the impulse

*November 30, 2011*

**Finance**

If you were general manager of a division, on which three key ratios would you choose tohave your unit's financial performance evaluated?

*November 28, 2011*

**word problem**

if 1 is added to both numerator and denominator of a fraction, the fraction becomes 1/2. if 8 is added to both fractions, the fraction becomes 2/3. what is the fraction

*November 21, 2011*

**word problem**

the different between the digit of a two digit number is 1, the number it self is 1 more than 5 times the sum of its digits, if the unit digit is greater than the tens digit, find the number.

*November 21, 2011*

**equations**

solve the equation 3y square-XY=0 equation(1) 2X-5Y=1 eqn (2)

*November 21, 2011*

**word problem**

if 1 is added to a numerator and denominator of a fraction, the fraction becomes 1/2. 8 is added to both fractions the fraction becomes 2/3, what is the number.

*November 21, 2011*

**word problem**

the different between the digit of a two digit number is 1, the number it self is 1 more than 5 times the sum of the digits, if the unit digit is greater than the tens digit, find the number.

*November 21, 2011*

**word problem**

in a two digit number, the sum of the digit is 8. the different between this number and the number with the digit reversed is 54, what is the number.

*November 21, 2011*

**word problem**

a woman age and her son added to 45, 5 years ago the woman was 6 times as old as her son. how old was the woman when the son was born.

*November 21, 2011*

**word problem**

bisi and ada age added up to 29, 7 years ago bisi was twice as old as ada, find their present age.

*November 21, 2011*

**Physics**

Tom the cat is chasing Jerry the mouse across a table surface 1.9 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6 m/s. Where will Tom strike the floor? The ac- celeration of gravity is 9.8 m/s2 . Answer...

*November 18, 2011*

**Physics**

Tom the cat is chasing Jerry the mouse across a table surface 1.9 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6 m/s. Where will Tom strike the floor? The ac- celeration of gravity is 9.8 m/s2 . Answer...

*November 18, 2011*

**Math**

differentiate 1-cosx/1+cosx

*November 13, 2011*

**Math**

Find the instantaneous rate of change of r with respect to theta for r = (theta/2)- (1/theta).

*November 13, 2011*

**algebra**

5x46=230

*November 1, 2011*

**algebra**

5x_=230

*November 1, 2011*

**probability**

out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was a. taking just ...

*October 27, 2011*

**math**

if you use $63.00 divided by 9 to estimate $62.59 divided by 9 is $7.00 greater than or less than the exact number? explain

*October 26, 2011*

**chemistry1**

How many mL of 0.200 M NaOH are needed to titrate 20.0 mL of 0.100 M H2SO4?

*October 26, 2011*

**Chemistry**

Thanks!

*October 26, 2011*

**Chemistry**

Well the lab is "determining Ksp for Ca(OH)2". And yes it's for titration.

*October 26, 2011*

**Chemistry**

give a formula you can use to calculate the number of moles of H+ ions used at the equivalence point.

*October 26, 2011*

**english**

please correct if the sentence into reported speech are right. 1-where do you buy your clothes? she asked me where did i buy my clothes? 2-how long have you been collecting these clothes? she asked me how long have i been collecting those clothes. 3-what will you wear at the ...

*October 25, 2011*

**Maths**

kelly is 140cm tall, that is just 4 cm short of twice as tall as her sister,how tall is her sister?

*October 25, 2011*

**Stastics**

Suppose cars arrive at Burger King's drive-through at the rate of 20 cars every hour between 12:00 noon and 1:00 pm. A random sample of 40 one-hour periods between 12:00 noon and 1:00 pm is selected and has 22.1 as the sample mean number of cars arriving. (a) Why is the ...

*October 22, 2011*

**general chemistry**

calculate the % of Na2So4 and BaCl2.2hro in the salt solution

*October 17, 2011*

**general chemistry**

A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant.

*October 17, 2011*

**algebra**

The perimeter of a rectangular field is 312 yards. If the length of the field is 93 yards what is its width?

*October 17, 2011*

**Algebra**

Oh ok thanks.

*October 14, 2011*

**Algebra**

In Algebra terms, what does "restrict the variables" mean?

*October 14, 2011*

**physics**

A shot-putter throws the shot ( mass = 7.3 kg) with an initial speed of 15.0 m/s at a 33.0 degreCalculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 1.90 m above the ground.e angle to the horizontal.

*October 12, 2011*

**World HIstory! hurry please**

How did the civilization that arose along the banks of the nile river differ from the civilizations of the fertile crescent?

*October 11, 2011*

**geometry**

In the square, find x if segment AB = 60 cm and segment BC = 4x – 50

*October 6, 2011*

**english**

GOT NO IDEA

*August 4, 2011*

**Chemistry! I got this answered**

I don't need help for this question

*June 30, 2011*

**Science **

I think that step 2 is the catalyst which leads me to believe that it is homogeneous, am I correct?

*June 30, 2011*

**Homework Help ME! Science**

In the reaction mechanism below, indicate what substance is acting like a catalyst. Step 1: H2O2 (aq) + I- (aq) → H2O (l) + IO- (aq) Step 2: H2O2 (aq) + IO- (aq) → H2O (l) + I- (aq) Is the catalyst in the problem above a heterogeneous or a homogeneous catalyst?

*June 30, 2011*

**Amelia Douglas**

Thanks.

*June 20, 2011*

**Amelia Douglas**

Through an Encyclopedia I figured that Amelia was born at Fort Assiniboine, but on the internet, it says she was born at Fort Churchill, which one is right?

*June 20, 2011*