Saturday

July 2, 2016
Total # Posts: 2,431

**Math**

A change purse contains an equal number of pennies, nickels, and dimes. The total value of the coins is 112 cents. How many coins of each type does the purse contain?
*February 1, 2011*

**science**

a)why do chemist prefer to read/ record the absorbance, rather that the percent transmittance, of light when analyzing a sample having a visible color? b) three parameters affect the absorbance of a sample. Which one is the focus of this experiment?
*January 31, 2011*

**Physics**

A 100-Watt light bulb plugged into a 120-Volt outlet is left on for 60 seconds. How much energy (in Joules) is used up by the bulb during this time?
*January 30, 2011*

**Math**

4(2x+1)-29=3(2x-5) I need help
*January 30, 2011*

**math**

Chloe used 30 toothpicks as edges to make a model for a prism. How many sides did the base of her prism have? How many vertices?
*January 30, 2011*

**math**

peer has $4.20 in dimes and quarters. He has 21 coins. How many coins of each kind does he have?
*January 30, 2011*

**math**

4TIMES9OVER30-KOVER16
*January 30, 2011*

**Algebra**

I think I figured it out. x=3 y=5 z=-1
*January 27, 2011*

**Algebra**

Solve the system: 3x-y+z=3 -x+y+2z=0 -5x+3y+2z=-2 x= y= z=
*January 27, 2011*

**Physics**

0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?
*January 26, 2011*

**math**

how do you find out the perimeter and the area of a parollelogram in a short cu way in a centimeter grid paper?
*January 26, 2011*

**physics**

A light bulb is wired in series with a 133-Ω resistor, and they are connected across a 120-V source. The power delivered to the light bulb is 22.5 W. What are the two possible resistances of the light bulb?
*January 25, 2011*

**math- check me**

Find the slope of the line graphed below. Points are (-4,-1) and (4,3) Is the slope 4/8 ?
*January 24, 2011*

**Math**

It was P(x)=2x^3-5x^2-9 I got 0 and x-3 is a factor
*January 24, 2011*

**Math**

Use the Factor Theorem to determine whether x-3 is a factor of P(x)=2x^3-5x^-9 . Specifically, evaluate P at the proper value, and then determine whether x-3 is a factor. P(_)=__ also pick which one applies x-3 is not a factor of P(x) x-3 is a factor of P(x)
*January 24, 2011*

**Math**

Simplify. Please help me fractions hate me:) (1/25-1/x^2)divided by (1/5+1/x)
*January 24, 2011*

**physical science**

What is the mass of a 10.0 cm3 cube of copper?
*January 22, 2011*

**physical science**

How many hours are required for a radio signal from a space probe near the dwarf planet Pluto, 6.00 x 10 (to the 9th) km away, to reach Earth? Assume that the radio signal travels at the speed of light, 3.00 10 (to the 8th) m/s.
*January 22, 2011*

**physics**

The car's displacement 0.7 s after leaving the dock has a magnitude of 14.0 m. What is the car's speed at the instant it drives off the edge of the dock?
*January 21, 2011*

**physics**

HELP!You are handed a 8.0 cm stack of new one-dollar bills. Assume the thickness of a dollar bill is 1.4 times thicker than your textbook paper (textbook paper = 63 um). (that's "micrometers") How many dollars are in your stack?
*January 20, 2011*

**physics**

Imagine for a moment that treble sounds could travel at 400 m/s, but bass sounds at only 200 m/s. If sound behaved that way, and you were listening to the CU band in Folsom stadium from a distance of 110 m, how much delay would you hear between the trumpet and tuba notes when ...
*January 20, 2011*

**physiscs**

A spherical balloon has an area of 7.1076 m2.How to you calculate the volume?
*January 20, 2011*

**physics**

Is the equation 344+0.6x(t-20)? I'm not getting this at all? How long does it take for sound to arrive at the back of a big auditorium if the temperature is 33 oC and the stage is 29 m away? answer in seconds
*January 20, 2011*

**Medical & Billing**

Can any one let me know how long it will take to complete Medical & billing certificate i am doing from Penn Foster and i am doing 4th assignement & 4 moths are over,it really sucks with projects kindly help me with ur comments what should i do continue or quit ?
*January 19, 2011*

**physics**

there's a typo. it should be R+h not R=h. my bad.
*January 19, 2011*

**physics**

What is the speed of a communications satellite orbiting the Moon at an altitude of 290 km above the Moon’s surface? I know that G=6.67e-11 and h=290. I plugged inthese values, 7.35e24 for the mass and 1.738e6 for the radius into v=sqrtGM/R=h but I didn't get the ...
*January 19, 2011*

**Business**

Would it be better to pay off a $1000 loan at 4% over 15 years or at 10% over five years ?
*January 17, 2011*

**physics**

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00m north, 2.00m northeast, and 1.00m at 30.0 degrees west of south starting at the same initial point, an golfer could make the hole in what single displacement?
*January 17, 2011*

**math**

whch division sentence will give an answer that is not in equal groups? 26/4 35/7 42/6 or 45/5
*January 13, 2011*

**economics**

You have the following data. A monopolist produces 1000 units of output per month, and sells it at the price of 10 each. You know that the monopolist does not do any price discrimination, and you also know that the price-cost margin of this firm (P-MC)/P is evaluated at 0.2. ...
*January 13, 2011*

**geometry**

if the measure of angle A = 70 degrees & the measure of angle B = 25 degrees, find the measure for angle C in the traingle of ABC
*January 12, 2011*

**Physics**

Tarzan (m = 75 kg) tries to cross a river by swinging from a 15.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. What is the total force Tarzan exerts on the vine at that point?
*January 10, 2011*

**Physics**

Fnet = ma 6.5 = 3.3a 6.5/3.3 = a 1.97 = a
*January 10, 2011*

**4th math**

Sammy ate 3/8 of a pizza, and Betty ate 1/8 of the same pizza. What fraction of the pizza did Sammy and Betty eat?
*January 3, 2011*

**chemistry**

Is a gaseous mixture able to contain isolated atoms and molecules, and if so, do the mixtures have to contain them?
*January 2, 2011*

**unscramble spanish words**

rvoidate
*January 2, 2011*

**calculus **

integrate: (square root of (6x+4)) - (2x) dx
*December 27, 2010*

**math**

if a rectnagular prism has a height of h, the, width of the prism is six less than h and the length of the prism is one fourth of the length, find an equation for the volume of the rectangular prism in therms of h
*December 22, 2010*

**statistics probablity**

Each time that Ed Charges an expense to his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual amount?
*December 16, 2010*

**math**

9+n=-2 solve
*December 14, 2010*

**math**

5= D+8 Solve
*December 14, 2010*

**7th Grade Math**

I Think it is 21 Because: 2 doubled is 4 4 + 5 is 9 a quarter of 9 is 3 3+9 is 12 12 plus two is 14 and 1/2 of 14 is 7 7 + 14 is 21. so 21 is the answer
*December 14, 2010*

**maths**

e^2*(ab)=d
*December 13, 2010*

**Calculus II**

Suppose that y = f (t) satisﬁes the diﬀerential equation dy/dt=y(2−y) and initial condition f (0) = 1. Find an explicit expression for f (t).
*December 13, 2010*

**chemistry**

The solubility of nickel (II) carbonate at 25 degrees C is 0.047 g/L. Calculate Ksp for nickel (II) carbonate.
*December 13, 2010*

**CMC/260**

I am writing a paper and need some help getting started. I was asked to, Compare in 750 to 1,050 words the relationship of status and age to gender in the U.S. with the relationship of status and age to gender in another country. I am confused about how to begin this paper.
*December 10, 2010*

**CMC/260**

Compare in 750 to 1,050 words the relationship of status and age to gender in the U.S. with the relationship of status and age to gender in another country.
*December 10, 2010*

**com**

When determining whether an online source is credible, it is important to use trusted news agencies, governmental websites, or educational, websites for information. Additionally, most credible websites have an "about us" section in which one can find information ...
*December 9, 2010*

**math**

b/4 >-5 solve inequality
*December 8, 2010*

**algebra**

-56+y>113 solve the inequality
*December 8, 2010*

**algebra 1**

Solve the equation 7z+30=-5
*December 8, 2010*

**physics**

yes i made a mistake its 3.38 x 10-4 m3
*December 6, 2010*

**physics**

A full can of black cherry soda has a mass of 0.406 kg. It contains 3.38 m3 of liquid. Assuming that the soda has the same density as water, find the volume of aluminum used to make the can.
*December 6, 2010*

**Science**

What is a 3 dimensional ecosystem? What is a 2 dimensional ecosystem?
*December 5, 2010*

**Physics**

#1.) A solar photovoltaic panel has an area of 3 m^2. The panel's maximum power output is 595 W @ 1100 W/m^2. a) What is its efficiency? b) If the panel receives 1300 W/m^2 of irradiance, what is its new power output? #2.) A solar voltaic module has a maximum output of 200...
*December 4, 2010*

**physics**

A 2.2 kg purse is dropped from 55 m above before reaching the ground with a velocity of 25 m/s. What was the average air resistance.
*December 2, 2010*

**physics**

harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in different?
*December 2, 2010*

**social studies**

The goal of America's containment policy was to
*December 2, 2010*

**8 th grade math**

2a+ab=c solve for a
*December 1, 2010*

**statistics**

a.
*December 1, 2010*

**Math**

If -T = 5, what is T ?
*December 1, 2010*

**english**

True
*December 1, 2010*

**science**

if 8 g of vinegar is added to baking soda to form 24 g of c02 and other products, how much baking soda did you need?
*December 1, 2010*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it
*November 30, 2010*

**Chemistry**

The solubility of calcium sulfate at 30 degrees C is .209 g/100mL solution. Calculate its Ksp i calculated it and got 1.5 x 10 ^-2 but the program said that it was wrong if you could help explain how to do it i would appreciate it
*November 30, 2010*

**Physics**

What force does work on a ball rotating down an inclined plane? Explain why the other forces the ball experiences do not do work.
*November 29, 2010*

**algebra 2**

whats 1+1
*November 29, 2010*

**3rd grade math**

Both Marlon and Jake have 4 cards. (2x4) Sam is by himself with only 3 cards.(1x3) Multiplication sentence is (2x4)+(1x3)= 8 + 3 = 11 Does this make sense? This the only way to get 11. By the way common core sucks!!!
*November 28, 2010*

**Economics**

I was thinking on doing Dellcomputers or even Geico insurance, but I must point out the facts on their website on one or the other. Havent trouble on how the company uses direct and indirect channels.
*November 26, 2010*

**Economics**

The Internet is forcing businesses away from traditional functions, such as distribution. The Internet effectively closes the gap between the buyer and the seller and has slowly been eliminating middlemen or intermediaries. Select a company from one of the following industries...
*November 26, 2010*

**statistics**

Estimation is best defined as: 1. a process of inferring the values of unknown population parameters from those of known sample statistics 2. a process of inferring the values of unknown samples statistics from those of known population parameters 3. any procedure that views ...
*November 24, 2010*

**Physics-Linear momentum**

A block of mass m = 2.60 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 6.80 kg which is at rest on a horizontal surface, Fig. 7-46. (Assume a smooth transition at the bottom of the incline, an elastic collision, and ...
*November 21, 2010*

**Physics**

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.80 10-23 kg·m/s, and 5.80 10-23 kg·m/s, respectively. What is the magnitude and direction of the ...
*November 21, 2010*

**statistics**

According to the standard bell curve and the empirical rule, the lowest 5% would be 2 standard deviations below the mean making the operating cost of the lowest 5% of airplanes equal to $1785
*November 21, 2010*

**Economics help**

i need a specific article I had a hard time looking for one
*November 21, 2010*

**Economics help**

Article dealing with monopoly power, either regulated or illegal attempts at monopolization.
*November 21, 2010*

**Math**

What would be an expression that can be used to show how many lengths of 5/8 inch lengths of string can be cut from a 15 inch length of string
*November 18, 2010*

**Math**

Tee received six $25 gift cards for his birthday. If he spends 1/4 of his money from the gift cards on Saturday, how much did he save to spend later?
*November 18, 2010*

**Question**

Because everyone should be equal. Everyone should have their voice and opinions heard. I don't know how else to expand on this.
*November 18, 2010*

**Question**

Why is it important to fight against inequality and promote human rights?
*November 18, 2010*

**Science**

Give an example of what you have determined is a bougus analysis using-quasi-scientific jargon, but has little or no objectivity.
*November 18, 2010*

**Chemistry**

A. ) A goodyear blimp typically contains 5400 m cubed of helium at an absolute pressure of 1.1*10^5 Pa. The temperature of the helium is 280 K. What is the mass (in kg) of the helium of the blimp? B. ) Estimate the spacing between the centers of neighboring atoms in a piece of...
*November 17, 2010*

**chemistry**

A. ) A goodyear blimp typically contains 5400 m cubed of helium at an absolute pressure of 1.1*10^5 Pa. The temperature of the helium is 280 K. What is the mass (in kg) of the helium of the blimp? B. ) Estimate the spacing between the centers of neighboring atoms in a piece of...
*November 17, 2010*

**math**

There are 25 students in math class. 15 students are female. What percent of the class is female
*November 15, 2010*

**Chemistry**

i don't know I need help too
*November 15, 2010*

**Physics**

A 260 kg piano slides 4.1 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b) Calculate the work ...
*November 14, 2010*

**Physics**

A vertical spring (ignore its mass), whose spring stiffness constant is 880 N/m, is attached to a table and is compressed down 0.160 m. (a) What upward speed can it give to a 0.300 kg ball when released? (b) How high above its original position (spring compressed) will the ...
*November 14, 2010*

**Western civilization**

Describe and Explain Mussolini's rise to power.
*November 11, 2010*

**Chemistry**

What volume of 0.200 N H2SO4 is required to neutralize a solution containing 8.00 equivalents of NaOH?
*November 10, 2010*

**1st grade**

Erin passed Angelina in the hallaway
*November 8, 2010*

**Math, Algebra**

A=1/2h(b1=b2) A=200 , b1=24 , h=10
*November 7, 2010*

**math**

multiply and simplify 5Ib. 6oz. * 5
*November 7, 2010*

**english**

explain why communicationis described as a process
*November 6, 2010*

**Math**

multiply and simplify 5ib.6oz. * 5
*November 4, 2010*

**physics**

A 2.38 × 103 kg car requires 5.4 kJ of work to move from rest to some final speed. During this time, the car moves 28.1 m. Neglecting friction, find a) the final speed. Answer in units of m/s.
*November 2, 2010*

**Physics**

I solved the following question: "A ball is launched from the top of a 320 m high building at 50 m/s at an angle of 37 degrees to the horizontal. For the first 10 seconds of flight, make a table of the vertical position from the ground versus time similar to the one below...
*November 1, 2010*