Monday

September 26, 2016
Total # Posts: 387

**math**

67.2 = mean 10.03= SD percentage=48.81%

*April 12, 2012*

**Math**

The ratio of Maya's beads to Kayla's beads was12:7. After Maya bought another 28 beads and Kayla gave away 32 beads, 5/7 of Kayla's beads were left. How many more beads did Maya have than Kayla in the beginning? Find the ratio of Maya's beads to Kayla's ...

*April 8, 2012*

**Math**

If Will gives Molly $9 he will have the same amount as her. If Molly gives will $9 the ratio of the money she has to the money Will has will be 1:2. How much money does Will have in the beginning

*April 7, 2012*

**Statistics**

How do you calculate the percentage of women that have weights between 140 lb and 220 lb with a mean of 145 lb and a standard deviation of 31 lb?

*April 7, 2012*

**geometry**

the pentagons are similar. the area of the smaller pentagon is 30m squared. what is the area of the larger pentagon in m squared?

*March 29, 2012*

**physics**

a) (304/26.7)*2 = 22.8 b) 26.7/22.8 = 1.173

*March 28, 2012*

**pre-algebra**

you have twice as many dimes as you do nickels and two more quarters than nickels that equals $2.50

*March 21, 2012*

**science**

jkkkk

*March 9, 2012*

**critical thinking**

1. Identify areas of environmental concerns. According to the area that the Bivouac site will be set, it will be an area where there will be hills, wetlands (water source), several winding streams, and one large river and some marked-off archeological sites. This are the ...

*March 8, 2012*

**Physics**

An audible standing wave is produced when air is blown across a pipe that is open at both ends. If the pipe is 29 cm tall, what is the frequency of sound produced?

*March 5, 2012*

**math**

there were 490 altogether in 2 groups. group A consited of only boys and group b constied of only girls. ther were 2 and a half times as many girls as boys. some girls joined group b and foe every 4 boys in group a 32 more boys jioned the group. the total number og girls was ...

*March 1, 2012*

**Math**

Tap A was turned on to fill a rectangular tank of 50 cm by 40 cm by 28 cm with water at a rate of 6 liters per minute. After 2 minutes, Tap B was turned on to drain water from the tank at a rate of 2 liters per minute. 6 minutes after Tap B was turned on, both taps were turned...

*February 28, 2012*

**PSY**

The correct answer is D

*February 20, 2012*

**Psychology**

Sally is driving her car and talking on her cell phone. Statistically this behavior has been shown to be quite dangerous and contributes to many automobile accidents. In performing these two tasks simultaneously, Sally uses: a. conscious cognitive processes b. mindless ...

*February 20, 2012*

**Psychology**

The majority of psychologists are electric, which means they draw information from different schools of thought rather than limiting themselves to information gained from only one perspective. However, most psychologists agree that it's important to: a. gather empirical ...

*February 20, 2012*

**HELP 15**

defiantly not i got that wrong on my exam

*February 19, 2012*

**HELP12**

its not b i got that wrong

*February 19, 2012*

**HELP11**

i marked that and got that wrong

*February 19, 2012*

**Additional maths**

Given one of the roots of the quadratic equation x^2+kx=12 is one third the other root. Find the possible values of k.

*February 1, 2012*

**math**

If Julie bought 8 T-shirts, she would be short $28. If she bought 4 T-shirts and 3 baseball hats, she would have $17 left. If each hat cost $5, how much money did she have in the beginning?

*January 22, 2012*

**math**

every week Brady gets $2.50 more for his allowance than Max does. They spend $6 on snacks and save the rest. Brady saves $72, but Max saves only $52. How many weeks does it take Brady to save $72? Hoe much money does Max get every week?

*January 22, 2012*

**phyics 2**

Object A attracts object B with a gravitational force of 10 newtons from a given distance. If the distance between the two objects is doubled, what is the changed force of attraction between them?

*January 19, 2012*

**Physics**

Imagine that a person is seated in a chair that is suspended by a rope that goes over a pulley. The person holds the other end of the rope in his or her hands. Assume that the combined mass of the person and chair is M. What is the magnitude of the downward force the person ...

*January 16, 2012*

**Physics**

A 32 kg child puts a 15 kg box into a 12 kg wagon. The child then pulls horizontally on the wagon with a force of 65 N. if the box does not move relative to the wagon, what is the static friction force on the box?

*January 16, 2012*

**Physics**

Eh, from what it looks like, it should just be the change in height that you need to do, which will be in units of miles right? and then you multiply that by the ratio of delta V to altitude change, which I believe is in units of (ft/s)/(change in miles)

*December 28, 2011*

**AP Calculus**

At what value of h is the rate of increase of √h twice the rate of increase of h? (a) 1/16 (b) 1/4 (c) 1 (d) 2 (e) 4

*December 22, 2011*

**Physics**

A diver springs upward with an initial speed of 2.23 m/s from a 3.0-m board. (a) Find the velocity with which he strikes the water. [Hint: When the diver reaches the water, his displacement is y = -3.0 m (measured from the board), assuming that the downward direction is chosen...

*December 13, 2011*

**Physics**

In preparation for this problem, review Conceptual Example 7. From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. The initial speed of the pebble is 6.46 m/s. (a) What is the acceleration (magnitude and ...

*December 13, 2011*

**chemistry**

how many milliliters of dry CO2 measured at STP could be evolved in the reaction between 20.0 mL of 0.100 M NaHCO3 and 30.0 mL of 0.0800 M HCl

*December 6, 2011*

**geometry**

ABC is congruent to DEF AB = 11, BC = 14, CA = 20, FD = 4x - 12 Find x

*November 20, 2011*

**algebra **

11-(3x-6)+2(4x+5)-7x

*November 16, 2011*

**geometry**

If the area of a rectangle is 50cm and two circles are inside which are tangent to each other and the rectangle's side. What is the radius?

*November 15, 2011*

**psychology**

Sexual arousal in human beings is different from that of animals. It is clear that human sexual arousal can occur

*November 14, 2011*

**psychology**

. Expectation plays an important role in:

*November 14, 2011*

**accounting**

What is the future value on 12/31/2014 of a deposit of $10,000 made of 12/31/2010 assuming interest of 16% compound quarterly.

*November 14, 2011*

**Factoring Trinomials**

b-6b+8

*October 31, 2011*

**economics**

An accountant deposits 100 per month into an account that pays 8% per year compounded quarterly ( no interperiod compounding) How much will she have in 10 years

*October 9, 2011*

**math 9th grade**

multiplying a number by x yields the same result as divinding the number by .125. what is tge vaule of it.

*October 9, 2011*

**math**

how can you tell where the absolute value of (x^2-1) is differentiable?

*September 29, 2011*

**calc**

A basic fact of algebra states that c is a root of a polynomial f(x) if and only if f(x) = (x-c)g(x) for some polynomial g(x). We say that c is a multiple root if f(x) = [(x-c)^2](h(x)) where h(x) is a polynomial. Show that c is a multiple root of f(x) if and only if c is a ...

*September 27, 2011*

**science**

a science acrostic full sentencess help!!

*September 12, 2011*

**Biology**

Not bad. I had the same q and answered it similarly

*August 12, 2011*

**algebra**

Five years ago, you bought a house for $171,000. You had a down payment of $35,000, which meant you took out a loan for $136,000. Your interest rate was $5.6% fixed. You would like to pay more on your loan. You check your bank statement and find the following information. ...

*August 9, 2011*

**The Age of Discovery To The American Experiment**

The first stirrings of the first Great Awakening took place in

*July 13, 2011*

**American History**

In 1700, which of the following colonies had the largest slave population relative to its overall population?

*July 13, 2011*

**American History**

In Jefferson's view, George Washington's action in addressing the Whiskey Rebellion

*July 13, 2011*

**Chemistry**

2.73 x 10^-4

*July 12, 2011*

**physical science**

How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from the bottom of a freighter's hold to the deck (40.0 m)?

*June 23, 2011*

**physical science**

What is the kinetic energy of a 27 kg dog that is running at a speed of 8.3 m/s (about 19 mi/h

*May 31, 2011*

**math**

solve 5/8 of 22

*May 26, 2011*

**algebra**

What is the value of the expression 2x to the 2nd power + 3xy -4y to the 2nd power when x = 2 and y = -4? please show how to solve this

*May 21, 2011*

**Grammar**

This does raise the possibility of early left ventricular failure, however there is no pulmonary edema and no acute infiltrates.

*May 9, 2011*

**social studies**

what landform dominates much of Latin America , especially South AMerica?

*May 4, 2011*

**PHYSICS**

5.00x 10^-2 mass with charge +0.75 micro coulombs is hung by a thin insulated thread. Charge of -0.9 micro coulombs is held .15meters directly to the right so that the thread makes an angle with the vertical. What is the angle and the tension in the string?

*March 29, 2011*

**stats**

sample was obtained from a population with unknown parameters. scores: 6, 12, 0, 3, 4 compute the sample mean and sandard deviation. compute the estimated standard error for M.

*March 27, 2011*

**Finance**

since its just after they deposit 1,000 then you multiply 29,000 x .06 = 1740. then add that to 30000 because they just deposited the 1,000. then you get $31,740

*March 21, 2011*

**Physics: Phase changes**

how much heat is needed to convert 500g of water at 100 degrees C to steam at 100 degrees C?

*March 21, 2011*

**7th grade Math **

divide: 306.52/19.4= 15.8

*March 21, 2011*

**Algebra**

You have to plug 4x^2 into the square root. the answer is 2x because the square root of 4 is 2 and then the x just stays with the 2.

*March 21, 2011*

**ECONOMICS**

WHAT DO GOVERNMENT STATISTCIANS CALCULATE GDP BY SIMPLY ADDING UP TOTAL SALES OFALL BUSINESSFIRMS IN ONE YEAR?

*March 3, 2011*

**statistics**

The population of SAT scores forms a normal distribution with a mean of Âµ =500 and a standard deviation of Ïƒ =100. If the average SAT score calculated for a sample of n = 25 students, a. What is the probability that the sample mean will be greater than ...

*February 27, 2011*

**chemistry**

"A 280ml flask contains pure helium at a pressure of 754 torr . A second flask with a volume of 475ml contains pure argon at a pressure of 732 torr . If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? ...

*February 26, 2011*

**college algebra (maths 112)**

actually this is only freshman (HS) math but i still don't remember how to do it

*February 24, 2011*

**Chemistry**

Samples of Neon and helium are placed in separate containers connected by a pinched rubber tube. There is 5.00 liters of neon at a pressure of 634 mm Hg in the first container. The second container has 3.00 liters of helium at 522 mm Hg. When the clamp is removed from the ...

*February 18, 2011*

**chemistry**

All of the lanthanide metals react with HCl to form compounds having the formula MCl2,MCl3,or MCl4 (where M represents the metallic element). Each metal forms a single compound. A chemist has .250g sample of a transition metal, and wishes to identify the metal. She reacts the ...

*February 9, 2011*

**chemistry**

If you have a 37.34g sample of ammonium chromate , how many protons do you have?\

*February 9, 2011*

**algebra 2**

suppose a house that costs $270,000 appreciates by 5% each year. in about how many years will the house be worth $350,000? use the equation 350 = (270) (1.05)^x and round the value of x to the nearest year.

*February 7, 2011*

**algebra**

(36x^3-60x^2-87x-21)divided by 9x+3

*February 3, 2011*

**math**

How could knowing that 35/7 equal 5 help you find 42/7 explain

*January 26, 2011*

**uOFp**

Imagine you are conducting fieldwork and discover two groups of mice living on opposite sides of a river. Assuming that you will not disturb the mice, design a study to determine whether these two groups belong to the same species

*January 24, 2011*

**MATH**

7 hrs

*January 12, 2011*

**chemistry**

How many moles of water, H2O, are present in 75.0 g H2O?

*December 15, 2010*

**science**

please help me unscramble oaoptvaien,aionitnrptsa rawdoungete & ntsiocnndeoa

*December 13, 2010*

**sociology**

I second that Stine.. I'll give you guys a hint, it has partiality to do with Conflict Theory.

*December 3, 2010*

**Math **

Donna and Rod bought a new van at an end of year sale for dealer cost plus 5%. If they paid $17,325.00 what was the dealer cost in dollars?

*December 3, 2010*

**6th grade**

wow. i learned something new! thank you both!

*December 2, 2010*

**6th grade**

i'm a little shy on X values sorry, but does that help?

*December 2, 2010*

**6th grade**

Exuse my ignorance, i'm in algebra 1 honors, but is the 7.50 represented by X? meaning 7.50x1/5?

*December 2, 2010*

**6th grade**

1/6

*December 2, 2010*

**math**

what is the question? isolate the X?

*December 2, 2010*

**Algebra**

can i get a formula?

*December 2, 2010*

**Algebra**

Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the mirror, angle 1 ...

*December 2, 2010*

**6th grade science**

magnetite will attract this

*November 1, 2010*

**science**

magnetite will attract this

*November 1, 2010*

**Physics( Checking answer)**

The first bullet has 2.4 Joules of energy, and the second has 9.6 Joules of energy. The equation is 1/2*m*v^2: You forgot that the mass is given in grams instead of kilograms, so you need to convert to kg (grams/1000, so .003 kg). You also didn't square the velocities. The...

*October 31, 2010*

**Chemisty**

A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?

*October 31, 2010*

**PreCalc**

what is the cot of theta if the cos of theta = 4/9 and theta lies in quadrant IV

*October 18, 2010*

**calc**

Average daily temp,y, is y=45-23cos(2pi(x-32)/365), where x is time in days, x=1, corresponds to Jan 1 and y is temp in degrees F. Determine the period of the function. Determine critical numbers, over one period. Determine relative extrema, what does relative extrema represents

*October 16, 2010*

**Math**

Depreciation of an office machine. Data regarding the value of a particular color copier is represented in the following graph. At what rate is the value changing?

*September 29, 2010*

**chemistry**

I don't know

*September 3, 2010*

**college**

The value of a mint state 63 uncalculated 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel in similar condition minted at Philadelphia. Together the total value of the two coins is 15.00 what is the value of each coin?

*August 29, 2010*

**Math (Very Easy Math)**

Simplified-down to lowest terms;cannot be reduced any more. I hope this helped,this is my own definition.

*July 24, 2010*

**CHEMISTRY (WEBWORK)**

^^ thats right. i just got it.

*July 19, 2010*

**Physics**

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?

*July 8, 2010*

**Algebra**

Amy paid $67.15 for a pair of running shoes during a 15% off sale. What was the regular price?

*June 10, 2010*

**Geometry 10th grade**

Find the perimeter or given triangle. KLM if JHG~KLM, KM=6, HJ=3, JG= 4, and GH=6. The biggest triangle is FHL. KLM is part of right corner of the big triangle and JHG is the left corner of the big triangle.

*June 7, 2010*