Wednesday

June 1, 2016
Total # Posts: 1,932

**Chem**

what is the mass in amu of 3.12 moles of Ba(NO3)2?
*November 13, 2015*

**Science**

What laboratory instrument utilized the wave nature of electrons?
*November 13, 2015*

**Math 141**

Two cards are drawn from a well-shuffled deck of 52 playing cards. Let X denote the number of aces drawn. Find P(X = 0). (Round your answer to three decimal places.)
*November 13, 2015*

**precalc**

I don't understand how to do these w/o calc. I tried to write it in a way that will make someone understand how to read it. Hope I typed it clear enough.Thanks so much for the help anyone! How to find the exact value of logarithm: 10. log5^100 -log5^4 11. log4^8 +log4^8 12...
*November 12, 2015*

**Math 141**

Box A contains 3 white marbles and 4 black marbles. Box B contains 6 white marbles and 5 black marbles. An experiment consists of first selecting a marble at random from Box A. The marble is transferred to Box B and then a second marble is drawn from Box B. What is the ...
*November 12, 2015*

**Math 141**

Three machines turn out all the products in a factory, with the first machine producing 20% of the products, the second machine 15%, and the third machine 65%. The first machine produces defective products 17% of the time, the second machine 8% of the time and the third ...
*November 11, 2015*

**precalc(LOGS) CONFUSED!**

How do I rewrite without logarithms?? 2. log x= log a - 4 log b 3. ln t= 3/2 ln a - ln p 4. log y = 3 log x + log 17
*November 11, 2015*

**Precalc**

i figured C. I'm really stuck on b &d. btw. I can't use a calculator to figure these because we aren't supposed to. How do you find it out w/o using calc.
*November 11, 2015*

**Precalc**

Given log2=0.3010, log3=0.4771, log5=0.6690, and log7=0.8451... Find a.) log8 b) log5/7 c.) log1.5 d.) log3/14 e) log12 I didn't know how to do b, c, and d. I also don't know if log 12 is right. Answer: a.) 0.903 b.)? c.)? d.)? e.) 1.0791
*November 11, 2015*

**Math Please check**

Okay, so I have to reduce my answer then I will have it right. Thank you!
*November 5, 2015*

**Math Please check**

-4x+3y=12 Solve for y I got: 12+4x/3 Is that right?
*November 5, 2015*

**Math**

Steve please help or somebody please help
*November 5, 2015*

**Math**

Please help
*November 5, 2015*

**Math**

Is the simplified form of 2square root of 3 ⋅ 2square root of 6 rational? Yes or No
*November 5, 2015*

**Math**

Thank You
*November 4, 2015*

**Math **

Which of the following options results in a graph that shows exponential growth A.f(x)= 0.4(3)^x B.f(x)= 3(0.5)^x C.f(x)= 0.8(0.9)^x D.f(x)= 0.9(5)^-x
*November 4, 2015*

**Math**

Thank You so much
*November 4, 2015*

**Math**

Which of the following options is an equivalent function to f(x) = 3(2)3^x? A.f(x)=3(8)^x B.f(x)= 24^x C.f(x)= 27(8)^x D.f(x)= 3(8x)
*November 4, 2015*

**Social Studies**

Who won the battle of the Atlanta Campaign
*October 28, 2015*

**Social Studies**

Interesting facts😑😑😑😑😑😊
*October 28, 2015*

**Social Studies**

Wat r 10 facts u didn't know about the Atlanta Campaign
*October 28, 2015*

**English**

Just took the test the answers are: 1)B 2)A 3)Flase Sorry if you got it wrong because she didn't say the answer. I personally did the whole lesson but still had trouble with the test.
*October 28, 2015*

**Math**

(3p-pq^3)2pq= I got: 6p^2q - 2p^2q4 Can it be simplified more?
*October 26, 2015*

**Math please check**

p= -3; q=2 2q(p+q)+3pq I got -22
*October 26, 2015*

**Math please check my work**

I see that now! Thank you!
*October 26, 2015*

**Math please check my work**

Where did I go wrong? I did this: 16(3--2) -8 + -8 16(5) + -16 80-16= 64 Thanks for your help.
*October 26, 2015*

**Math please check my work**

I forgot to put that x=4 and y=-2
*October 26, 2015*

**Math please check my work**

4x(3-y) - 2x + xy I got 64. Is that right?
*October 26, 2015*

**math**

A prize of $100, $200, $500, or $1000 will be randomly awarded to a game show contestant, with the probabilities of winning each prize shown in the table below. What is the expected value of the prize that will be awarded?
*October 21, 2015*

**Math**

True of false A broken scale can make changes in data appear less they than they actually are. If false, explain why. I know the answer is false because it is in my book, but I don't understand why.
*October 14, 2015*

**Physical Science**

I put that the kinetic energy increases, but am I missing something? Is that the whole answer?
*October 13, 2015*

**Physical Science**

What happens to the kinetic energy of a snowball as it rolls across the lawn and gains mass?
*October 13, 2015*

**Science/math**

Newtons second law of motion states that F =MA Force equals mass multiplied by acceleration. Mass is the constant. It does not change. What is the independent and dependent variable? I put force is independent and acceleration is dependent. Is that right?
*October 11, 2015*

**Math-Sorry I had a mistake in the first problem.**

Please check my work: Label the dependent and independent variable. 1. Time spent studying and Score on a test 2. If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life expectancy. What are the dependent and independent ...
*October 10, 2015*

**Msth**

Please check my work: Label the dependent and independent vstiablr. 1. Time spent studying and Score on a test 2. If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life expectancy. What are the dependent and independent ...
*October 10, 2015*

**Math**

Okay, thank you.
*October 1, 2015*

**Math**

How did you get that 1 cubic centimeter = 0.0610237 cubic inch ?
*October 1, 2015*

**Math**

Convert 630 cubic centimeters to cubic inches. I know that 1 inch = 2.54cm I tried 630/2.54 but I didn't get the answer in my book, which is 38.44. What am I doing wrong please?
*October 1, 2015*

**Math**

That's what I did and I got .45. I was just doubting myself because I thought I had to set it up differently. It seemed too easy. Thank you.
*September 30, 2015*

**Math**

A basketball player attempted 1789 free throws. He made 801 of of them. What is the probability that the player will make the next shot he attempts? Write the probability as a decimal rounded to the nearest hundredth.
*September 30, 2015*

**Algebra 1**

What are the two quantities that should be measured to find the rate at which water flows out of a shower head? Explain how the rate can be determined. Thanks!
*September 28, 2015*

**Science PLEASE HELP**

Okay, so yes a mixture can be made up of only elements. Why? Because mixtures can be made up of compounds and/or elements. Right?
*September 27, 2015*

**Science PLEASE HELP**

Could a mixture be made up of only elements and no compounds? Explain why or why not.
*September 27, 2015*

**Science**

Could a mixture be made up of only elements and no compounds? Explain why or why not.
*September 27, 2015*

**algebra**

If a=2 what is -a^2? -4 or 4? Why?
*September 22, 2015*

**Algebra**

ten-pin bowling ball has a volume of about 5274 cm3. A candlepin (8) bowling ball has a volume of about 48 in3. About how much greater is the volume of a ten-pin bowling ball than the volume of a candlepin bowling ball?
*September 20, 2015*

**Chemistry**

Lead has a density of 11 g/ml. Mercury has a density of 13.6 g/ml. How much more volume would 1 pound of lead occupy the one pound of mercury?
*September 19, 2015*

**statistics**

The cholesterol levels of adult American women has a mound-shaped and symmetric distribution with a mean of 188mg/dL and a standard deviation of 24 mg/dL. In what interval would you expect most American women’s cholesterol levels to be? Explain.
*September 19, 2015*

**physics**

Light from the Sun reaches Earth in 8.3 min. The speed of light is 3.00 x 10^8 m/s. How far is Earth from the Sun?
*September 15, 2015*

**Chemistry**

If 5ml of 10M HCl was added to 1 litre of 0.4M 3-(N-morpholino) propane sulfonic acid what would be the resulting pH?
*September 5, 2015*

**Math**

Internal rate of return What is the internal rate of return for the following project. An initial outlay of $9500 resulting in a single cash inflow of $16,281 in 7 years. Internal rate of return for the project is ___%
*June 15, 2015*

**Chemistry**

What is the total internal energy change (∆E), in J, of a system that releases 202.90 J of heat and absorbs 315.7 J of work from the surroundings?
*June 10, 2015*

**Civics ASAP PLZ =:)**

I had this question on a test of mine. I hope this is correct! Thx
*May 30, 2015*

**Geometry**

Find the approximate surface-area-to-volume ratio of a bowling ball with a radius of 5 inches. A. 0.6 B. 0.67 C. 1.67 D. 25
*May 29, 2015*

**math**

Yay! Thank you so much. Very much helps! :D
*May 14, 2015*

**MATH**

dumb ! is correct for colorado connections
*May 14, 2015*

**MATH**

Awesome thanks so much!
*May 14, 2015*

**Math Help**

With the given information below, write the standard form equation for the parabola. 1.) Vertex: (-1,2) Focus(-1,0) 2.) Vertex: (-2,1) Directrix x=1
*May 6, 2015*

**Physics**

A weather balloon is released at an altitude of 500m. The force of gravity on the balloon is 21.1n. The lift force provided by the atmosphere is 18.7n. Which of the following is true about the balloon? a. The balloon rises at constant velocity. b. the net force on the balloon...
*May 6, 2015*

**Language Arts**

Dude your a freaking life saver I kind of want to marry you know just made a hours worth of work into 20 minutes he's sooo weight
*May 1, 2015*

**Physics**

Update: Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface. Model a spherically symmetric planet, with the same radius as the earth, as having a density that decreases linearly with distance from the ...
*April 30, 2015*

**Physics**

A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. When the amplitude of the motion is 0.090m , it takes the block 2.68s to travel from x= 0.090m to x= -0.090m . If the amplitude is doubled, to 0.180m , how long does it ...
*April 26, 2015*

**Language Arts**

Lee IS right!!! 100% Ohhhh yeah!
*April 23, 2015*

**Language Arts**

Is Lee right or wrong?? -.- I need to know
*April 23, 2015*

**Math**

you have four $1 bills, two $5 bills, five $10 bills, and five $ 20 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. What is P($1, then$ 10)?
*April 22, 2015*

**Art**

Yep Anon was right! Thanks sooooo much!! :D
*April 22, 2015*

**Art**

The answer was D XD And btw if you go to connections 1 was c and 2 was b Just saying ;)
*April 18, 2015*

**Chemistry**

Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 16.2 g of ethane is mixed with 19. g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to ...
*April 10, 2015*

**physics**

The man fires an 75g arrow so that it is moving at 80 m/s when it hits and embeds in a 13kg block resting on ice. What is the velocity of the block and arrow just after the collision? How far will the block slide on the ice before stopping? A 7.2N friction force opposes its ...
*April 4, 2015*

**Chemistry**

Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.5g . 1.) What minimum mass of H2SO4 would you need? 2.)What mass of H2 gas would be ...
*March 29, 2015*

**Math**

If someone could help me with this, I would appreciate it! Thanks! Directions: Determine if these two are inverses of one another. A= [ 1 1 1 3 5 4 0 -1 0] A^-1= [ 4 -1 -1 0 0 -1 -3 1 2]
*March 27, 2015*

**Math check**

Yo was right for CO Connections multiplying polynomials
*March 21, 2015*

**Science**

OH YEAHHH! GOT 100% TOOOO! THANKS SO MUCH!!
*March 19, 2015*

**social studies**

1.gobi desert 2. Taiwan 3. mountain ranges make much of the region too dry to farm 4. other ethnic groups need a higher birth rate to survive.
*March 18, 2015*

**Physics**

A small wooden block with mass 0.800kg is suspended from the lower end of a light cord that is 1.52m long. The block is initially at rest. A bullet with mass 0.0126kg is fired at the block with a horizontal velocity v0. The bullet strikes the block and becomes embedded in it. ...
*March 12, 2015*

**physics**

Consider a purely inductive ac circuit in which the maximum voltage across the inductor is Vmax=98.0V. If the maximum current is 7.40A at 40.0Hz, what is the inductance L? Answer in mH.
*March 6, 2015*

**physics**

A 39-turn circular coil of wire has a diameter of 1.2m. It is placed with its axis along the direction of the Earth's magnetic field of 58μT at 52° below the horizontal, and then in 0.16s it is flipped 180°. a) What is volts the magnitude of the average ...
*February 28, 2015*

**math**

I want to plot my vertex on a cartesian plane. My question is can i go by different values on the axis? Since my vertex is (1, -64) could i go by 8 on the y axis, and by 1 on the x axis???
*February 25, 2015*

**Science**

An object weighing 90 N has a volume of 45 mL and a mass of 9.0 g. What is its density? a. 0.10 g/mL b. 0.20 g/mL c. 5.0 g/mL d. 10 g/mL
*February 24, 2015*

**Science**

@ Ms. Sue can you check please
*February 13, 2015*

**Science **

1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
*February 13, 2015*

**History**

@ Ms.Sue could you check this please
*February 8, 2015*

**History **

Where is the erie canal located? A- New york B- New Jersey C-Maryland D- Maine Cities grew along railroads and canals because A- the government designed the cities B- workers could not live anywhere else C- settlers could obtain cheap land nearby D- there were not enough roads...
*February 8, 2015*

**vectors **

The minute hand of a wall clock measures 11 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals. What are the (a) magnitude and (b) angle from a quarter after the hour ...
*February 2, 2015*

**geometry**

A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just don't ...
*February 2, 2015*

**Geometry**

A child on top of a lighthouse observes two ships that are 90 ft apart from each other. The angles of the depression of the two ships are 34º and 20º. How far is the closest ship from the base of the lighthouse? I'm sorry, I would show my work, I just don't ...
*February 2, 2015*

**algebra **

The mean on a Advanced Algebra test was 78 with a standard deviation of 8. If the test scores are normal distributed, find the interval about the mean that contains 99.7% of the scores. Use the empirical rule.
*January 28, 2015*

**math**

Mr. Smith’s first period class had an average of 90% on the first test, and his 4th period class had an average of 82%. If there were 30 people in his first class, and 22 in his second, what is the average score of someone in his class?
*January 28, 2015*

**Math**

Invisible braces cost $500 more than metal braces. Metal braces cost $4,800. How muchdo invisibles braces cost?
*January 21, 2015*

**language arts**

She is not all the way bad I got the answer to 6 from here.
*January 21, 2015*

**Physics**

Determine the magnitude of the gravitational force Mars would exert on man if he was on the surface of Mars. The mass of the man is 69.0kg . The mass of the Mars is 6.42×1023kg and its radius is 3396 km.
*January 12, 2015*

**language arts**

The young woman Lavinia Lyte sat at last and murmured to herself then to Johnny: "I must talk to toy, Jonathan Lyte tremain" Which of the following best explains why Johnny is so surprised by Lavinia Lyte's statement in this passage? a. Lavinia seems irritable ...
*January 6, 2015*

**language arts**

Which of the following passages from Johnny tremain is most useful in helping you determine what type of ruler general gage is? Select all that apply A. Sam Adams was so happy his hands shook worse then ever B. He was not brilliant but he was no tyrant C. His majesties fleet ...
*December 18, 2014*

**Science-Physics**

A mover is pushing a crate across the floor. He exerts a force of 500 Newtons and pushes the crate a distance of 5 Meters. How much work did the mover do on the crate?
*December 17, 2014*

**algebra**

***I USED A DIFFERENT PROBLEM. FOLLOW THE STEPS!!! The vertex is either the minimum point of the graph of the maximum point of the graph if the equation is a quadratic equation. if it is the minimum point on the graph, than any other point on the graph will be above it. if it ...
*December 17, 2014*

**chemistry**

ok thank you so much
*December 15, 2014*

**chemistry**

is the answer 30?
*December 15, 2014*

**chemistry**

so i would solve for x
*December 15, 2014*

**chemistry**

gasoline sold in ontario must contain at least 5.00% v/v ethanol? How much gasoline contains 1.50 L of ethanol
*December 15, 2014*