Total # Posts: 402

Math
determine whether the number sentence is true. In each case explain how you could answer without calculating. Check your answers by doing the indicated calculations. A. 50 x 432= (50 x 400) + (50 x 32) B. 50 x 368 = (50 x 400) - (50 x 32) C. 50 x 800= ( 50 x 1000) + (50 x 200...

Chem
A 1.0 mL sample of seawater is determined to contain 9.0×10-14 moles of dissolved gold. How many atoms of gold are in that volume of seawater?

science
wait is it C

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars...

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars...

science
Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up individual stars...

Chemistry
Give the formula and charge of the oxoanion ONLY in each of the following compounds. potassium sulfite sodium perchlorate lithium phosphite magnesium hypochlorite

Social Studies
thanks hello

math/econ
If the demand is x(p)=40(p-15^2) with p being the price and x being hte demand, what would the elasticity of demand equation be?

Calculus
How do I find the derivative of e^y -y=x^2 -2? Do I use chain rule with -d/dy or -d/dx or dy/dx? And then how do I find the slope of the graph if the point's at (2,0)?

Calculus
How many units should this company sell to maximize their revenue if the revenue function was -(x^2/100)+50x using derivatives?

Science
How much effort force would you have to use to lift a 800 newton load using a pulley system with a mechanical advantage of 4?

Literature
its called our town

Literature
Since the time of the play's first performance, the props and set have been designed to be minimal so that the play can be performed in outdoor as well as indoor locations the play becomes more appealing for younger audiences **my answer actors must think of new ways to ...

Math
Solve and graph the following inequality: -m/5+8>10

Science
Which of the following is NOT a characteristic of an animal? Have eukaryotic cells digest their food make their own food******* have many cells with different functions

Science
thank you

Science
The basic activities of life occur in the _______ nucleus DNA mitochondria cell****

math
Can someone explain this question to me, I don't get it?

math
In constructing a box-and-whisker plot for the data set below, at which values would you draw the left and right sides of the box? 6, 7, 1, 3, 9, 3, 2, 5, 8, 4, 8 A. left at 3; right at 8 B. left at 2; right at 8 C. left at 2; right at 7 D. left at 3; right at 7

Math
Please, I tried going back and rereading through the lesson but I couldn't find anything. If someone could just explain what an upper quartile is then i can figure out the answer.

Math
I don't understand this question can someone please explain what an upper quartile is?!?

Math
What is the upper quartile of the data set below 25, 8, 10, 35, 5, 45, 40, 30, 20 A. 5 B. 8 C. 9 D. 10

English

Math
Sarah can afford \$255 per month for 6 years on a car payment, what is the price of a car that she can afford at this time? Assume an annual interest rate of 8%. I do not remember how to solve for problems like this one.

Maths
Ok thank you

Maths
Allan buys a used car for his daughter by paying a 20% deposit and \$275 per month for 4 years. If the car has a cash price of \$10 400, find the flat interest rate (p.a.) correct to one decimal place. I got 14.7% but the answers say 58.7 could someone please help. What is did ...

Social studies
Which of the following was the first major battle of the civil war

Math; Calculus
You toss a rock up vertically at an initial speed of 55 feet per second and release it at an initial height of 6 feet. The rock will remain in the air for_______ seconds. It will reach a maximum height of_______ feet after ________ seconds.

Chem
Thank you so much!

Chem
Is there any way you could help me with this one also? We will calculate the amount of acid to use in each titration. Assume that you are using 0.0512 M NaOH(aq). A good volume of NaOH(aq) to use per titration is 15 mL. From this molarity and volume, the moles of NaOH can be ...

Chem
Thank you!

Chem
So if I did .00840 mol X .177g I'll get .00148 but my quiz says that's wrong still.

Chem
If .00840 mol is the answer to this question (Suppose that 16.41 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used? ) how would I answer this: Assuming that the unknown acid sample in question 1 had a mass of 0.177 g, what ...

If two fair dice are rolled, what is the probability that a total showing is either even or less than eight? How would I solve this question? What are the steps? Thanks

MATH
It's not. That's what I originally thought

MATH
The odds in favor of Carl beating his friend in a round of golf are 7 : 4. Find the probability that Carl will lose. would the answer be 7/11?

Algebra 2
If two fair dice are rolled, what is the probability that a total showing is either even or less than eight? How would I solve this question? What are the steps? Thanks

math
One leg of a right triangle is one less than twice the other. The area of the triangle is 18 square feet. What is the length of the 3rd side of the triangle? Solve by factoring. A= 1/2 (b)(h) 18= 1/2 (x)(2x-1)

Geometry
anonymous is wrong cool is right

Physics
These are Thermodynamics questions: There is a 7 kg piece of aluminum at 80°C placed in a 3 kg water at 20°C what is the final temperature? There is a piece of aluminum at 90°C placed in 2 kg of water at 35°C how much energy is transferred if the final ...

History
How are women increasingly impacting politics in America because of the 19th amendment?

Math
Convert equation from quadratic form to vertex form, y= a(x-h)^2 +k, by completing the square. y= -.25x^2+5.5x-5.25

Math
Use the quadratic formula to find the roots Y= -.25x^2 + 5.5x- 5.25

physical science
sooo 70g * 24 oC = 110 Oc?

physical science
How much heat is absorbed by a 70g iron skillet when its temperature rises from 24oC to 110oC? joules

physical science
A pendulum has 501 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing? joules

math
The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x minutes. Which equation ...

physics
The coefficient of kinetic friction for wood on wood is o.55. The coefficient of kinetic friction for wood on wood is 0.68. For a 3.5kg wood block being pulled horizontally: a. what is the pull force needed to start the wood block moving on a wood floor? b. how hard would you ...

Math

thxs steve

SS
thanks hiii

Science
the second Galibiller is right thxs

Health
thanks girl who loves ballet

Social Studies
thanks ally

Language Arts
Anonymous is right

S.S
cca is right

Math
Incorrect

ela
omg thanks cca is right

Science
Plz HELP me !!!!! I need to know a acrostic poem about safety plz help me it is due tomorrow

Ed Tech
thanks that awesome

yes is correct thxs

Physics
A 4.0-kg block slides down an inclined plane that makes an angle of 25° with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.4 s. Find the coefficient of kinetic friction between the block and plane.

Math
1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble from a bag of marbles...

Science
jenna is right

Geography
Whatever... thanks for nothing

Geography
They had more land and British was in debt.

Geography
What are the political, economic, and social reasons why the stamp act was not not fair to the colonist?

Physics
A block of mass m=25 kg is hung by a massless rope of length L=1.90 m from the ceiling of an elevator. The elevator has a downward acceleration of a=2.20 m/s^2. When the pendulum is set in a small amplitude oscillation, the period T of the pendulum is: A) 2.50s B) 3.14s C) 1....

Ingrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. She divides the trail mix into 12 equal portions. Each portion weighs 0.7 pound. How many pounds of raisins did she use to make the trail mix? Express the answer to the nearest tenth.

Algebra, math
What happened when 1000 baseballs fell from an airplane?

Geography
If colonial boundaries have produced a large number of problems for African countries, could the contient's people revert to the boundaries that existed before European colonialism? What other solutions might there be to the problems created by Africa's borders?

Physics
5.62

English
B A A

chemistry
A reaction mixture of N2O4 and NO2 absorbs the heat given off in the combustion of 6.35 L CH4 measured at 24.7 C and 812 Torr. How many moles of N2O4 can be converted to NO2 as a result? CH4 + 2O2 --> CO2 + 2H2O Delta H = -890.3 KJ N2O4 --> 2NO2 Delta H = +57.2 KJ

chemistry
how many grams of solid calcium oxide must react with excess water to liberate the same quantity of heat as does the combustion of 24.4 l of methane gas (CH4), measures ar 24.7 c and 753 torr? CaO +H2O --> Ca(OH)2 Delta H = -65.2 KJ CH4 + 2O2 --> CO2 +2H20 Delta H=-890.3...

Math
Your computer supply store sells two types of laser printers. The first type, A, has a cost of \$86 and you make a \$45 profit on each one. The second type, B, has a cost of \$130 and you make a \$35 profit on each one. You expect to sell at least 100 laser printers this month and...

You are welcome!

Good job! I am not sure that #6 and #8 are correct. I do not know if they are correct. Not saying they are wrong just saying that I can't be sure! All the rest look great!! 😁😁😁😁😁

2 is A. Sorry! I didn't catch that!

Wonderful job!! I believe they are all correct! 😁😁😁

Maths literacy ,life science,history,geography

Geometry B: Unit 3: Similarity Lesson5 Practice

5 is correct. I am not 100% sure about 3 & 4. So sorry!

2 is correct!

1 is correct. I will continue checking the others!

Pre calculus DAMON CAN YOU HELP?
Does anyone know how to solve this?

Pre calculus
Your computer supply store sells two types of laser printers. The first type, A, has a cost of \$86 and you make a \$45 profit on each one. The second type, B, has a cost of \$130 and you make a \$35 profit on each one. You expect to sell at least 100 laser printers this month and...

English

English
Hi Alexia! I would love to work through these questions with you. Please tell me what you think the answer is for number 2. I will check it and give you feedback! :)

chemistry
1. You don't have an arrow but I assume it goes between N2 and 2NH3. 2. You have no Kp or Kc listed. 3. You won't make any hydrogen atoms. Perhaps you meant, "How many atoms of hydrogen will be in the NH3 formed."

math
Please tell me what you think! :)

statistics
Okay, go ahead and make a list of all that you can think of. I will be happy to go over it with you!! 😁😁

CHEMISTRY! HELP
I'm not sure how to do or show the work for these two questions. A) & B.)!! please anyone help: A.) Suppose a chemical reaction starts with 5.00 g of copper (i) nitrate and 2.00 g of magnesium chloride. Balanced Equation: 2 CuNo3 + MgCl2 ---> 2 CuCl + MgNO3 1.) ...

Math plz help one qustion only!!!!!!!!!!!!!!!!!!!!
thanks Alyssa

Maths
-36 176 -34 -218

AP Chem
1. Van't Hoff factors depend on the concentrations of the dissolved solute species. Why would a dilute solution have a Van't Hoff factor closer to the ideal value? a. because in dilute solutions solute species are less likely to bump into each other and pair up. b. ...

math
Try wolframalpha[dot]com

Math
The given angle is in standard position. Determine the quadrant in which the angle lies. -25° A. Quadrant III B. Quadrant II C. Quadrant IV D. Quadrant I

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