# Posts by Maddie

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**

It's adverbial right?

**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 ...

**Please help (MATH)**

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**

If you had 73 and you divided it by 5 what is your answer?? Answer:14.6

**Check my answers**

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

**Social Studies (check my answers)**

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....

**math 7th grade**

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...

**Health PLEASE CHECK ANSWERS**

You are welcome!

**Health PLEASE CHECK ANSWERS**

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!! 😁😁😁😁😁

**health check my answers**

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

**health check my answers**

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

**Maths literacy ,life science,history,geography**

I don't understand your question... Please clarify! 😁😁😁😁

**Geometry B: Unit 3: Similarity Lesson5 Practice**

How can I help you, Blair?

**History(please check)**

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

**History(please check)**

2 is correct!

**History(please check)**

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**

Absolutely!! Take your time! 😁😁😁

**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. ...

**foreign languages**

vaca

**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