# Posts by Ashley

Total # Posts: 3,448

**Phy**

A uniform beam of length l whose mass is 3.5kg rests with its ends on two digital scales. A block with a mass of 1.3kg rests on the beam, 1/4 of the distance in from the left balance. What do the scales read?

**math**

consider a scenario where a binomial experiment is conducted and the probability of success in each trial is 40%. if the experiment includes 15 trials, what is the probability that out of those 15 trials, exactly 10 will be successful? Pls help with formula!

**Chemistry**

Ca(OH)2+Na2CO3> 2NaOH + CaCO3 50g hydroxide and 50g sodium carbonate are reacted. How many grams sodium hydroxide will be made?

**math**

$30.00

**Stats**

Y is a discrete random variable. The table below reports the values of Y and the corresponding frequency, n (the number of observations for each value). Based on this information, what is the expected value of Y? Y n 50 50 70 100 100 200 200 50 120 100 140 100 150 100

**Stats**

Assume that the table below represents the distribution of X. Note that X is a discrete random variable. The second column reports the number of observations for each value of X. Based on this information, what is the value of the Cumulative Distribution Function when X equals...

**stat**

Assume that the table below represents the distribution of X. Note that X is a discrete random variable. The second column reports the number of observations for each value of X. Based on this information, what is the variance of X? X n 20 10 25 10 30 5 15 10 10 5

**Chemistry**

How many oxygen atoms are there in 0.018 mg of H2O?

**Physics**

A meter stick is rotated about the end labeled 0.00 cm, so that the other end of the stick moves through an arc length of 8.60 cm. Through what arc length s does the 25.0-cm mark on the stick move? I have no clue what Im doing, I know S=tr but what is t?

**math**

Find the length of a guy wire that makes an angle of 45.5 degrees with the ground if the wire is attached at the top of a tower 63.0 meters high

**English**

D?

**Montwood Middle school**

What is 4/3,-0.09,1.3,85%,-3/8 ordered like in ascending order?

**Math**

Height of a Projectile. The height of a projectile is described by the equation: s(t)=144t-16t^(2) Where t is in seconds and s(t) is the height of the projectile at time t. Find when the projectile hits the ground.

**Science**

Hi I've read everything and searched everything and I can't find the answer to this question so... How is iodine-131 and iodine-126 similar and how is it different? Thank you this is stressin me out!

**help**

The correct answer is D.

**Statistics**

Do the samples appear to be from the same population? Why or why not? Support your answer with numerical facts and convincing reasons and explanations Chemical distribution stats: Five # summary: (2.29816, 2.29869, 2.299152, 2.30074) Mean: 2.299706 Standard deviation: 0.001313...

**math**

ok thank you very much for helping

**math**

ok thanks!

**math**

So do you multiply 1:8 by 5?

**math**

scale model is 5 meters

**math**

if a scale model of a truck is 5m, and the scale is 1:8, what is the length of the truck?

**Math 125**

how do i solve: a manufacturer of calculators has determined that 10,000 calculators per week will be sold at price of $95 per calculator. At a price of $90, it is estimated that 12,000 calculators will be sold. Predict the number of calculators that will be sold at a price of...

**physics**

A soccer ball accelerates from rest and rolls 6.5 meters down a hill in 3.1 seconds. It then bumps a tree. What is the speed of the ball right before it hits a tree?

**Geometry**

The answer is 128 and 52. How did they get the answer?

**Geometry**

The measure of an angles supplement is 76 less than that the measure of the angles. Find the measure of rhe angle and its supplement?

**Geometry**

The answer is x=41 and y= 139. How did they get the answe?

**Geometry**

Set up a system to solve. Two angles are supplementary. Three times one angle is equal to the other angle minus 16. Find the angles. The answer is x= 41 and y= 139. How did they get the answer?

**Geometry**

The answer is x=20 and y=70 but I don't know how they got the answer..

**Geometry**

Set up a system to solve. Two angles are complementary. Four times one angle is equal to the other angle plus 10. Find the two angles.

**Geometry**

The answer is x=48 and y=132 but how did they get this answer?

**Geometry**

set up a system to solve. Two angles are supplementary. Twice one angle is equal to the other anlge minus 36. Find both angles.

**AP Statistics**

Do the samples appear to be from the same population? Why or why not? Support your answer with numerical facts and convincing reasons and explanations Chemical distribution stats: Five # summary: (2.29816, 2.29869, 2.299152, 2.30074) Mean: 2.299706 Standard deviation: 0....

**Health. Please check answers**

They're all B <33

**Physics**

Henry you didn't answer the question

**Math**

Find the lateral area of a tetrahedron. Slant height is 13in 12in for height.

**Chemistry**

Thank you so much!!

**Chemistry**

A sample that is 63.9 % chloride by mass is dissolved in water and treated with an excess of AgNO3. If the mass of the AgCl precipitate is 1.045g, what was the mass of the original sample?

**Chemistry**

Could someone please walk me through how to solve this problem: A sample that is 63.9 % chloride by mass is dissolved in water and treated with an excess of AgNO3. If the mass of the AgCl precipitate is 1.045g, what was the mass of the original sample?

**Health**

1: metabolism 2 : fiber 3: protein

**Language arts**

i took the test and these are the answers 1. A 2. PART a. C PART b. B 3. PART a. D PART b. B 4. D 5. B 6. PART a. C PART b. D 7. D 8. A 9. B 10. D

**physics**

a 12uc test charge was placed 20cm from a source of an electric field. There was a measured force of 0.6N acting on the test charge. What is the strength of the electric field measured by the test charge??

**maths**

If the price of one tin is £t, which of the expressions below represents how much it will cost Morris to buy five tins? 5(t – 1) 5t – 1 t – 5 5t – 5

**Physics**

You are driving off of a horizontal cliff, again!!! The cliff is measured to be 35.56 m above a rocky ravine floor, but you land 10.36 m away from the sheer cliff face. How fast were you going when you drove off of the cliff?

**Physics**

You are driving off of a horizontal cliff, and your car has a horizontal velocity of 29.33 m/s at the instant you leave the cliff. The cliff is an unknown height above a rocky ravine, but you land 146.8 m away from the sheer cliff face. How tall is the cliff?

**Chemistry**

If 2.0 mol of propane are burned (reacted with oxygen), how many moles of carbon dioxide will be produced? C3H8 (g) + 5 O2(g) → 3 CO2 (g) + 4 H2O (g) I just want to make sure the answer is 6 mol of CO2 will be produced.

**math**

find the product tell which strategy you used (4x10)x10

**algebra**

You shouldn't call people retarted.. and Damon got the answer right, and you didn't know the answer so maybe you Oscar are "Weird.'

**algebra**

You shouldn't call people retarted..

**English**

lmao are those right ^

**Math**

Evelyn sells used cars he base salary is $800 a week and she receives a 12% commission on each sale represent Evelyn total salary for the week if she had d dollars of sales

**health**

A patient who lost his or her hearing sometime after birth is said to be A. half-deaf. B. adventitiously deaf. C. incurably deaf. D. congenitally deaf.

**occupational therapy**

Which of the following questions is best worded for the confused patient? A. "When would you like to go for your walk?" B. "Would you like a drink with your dinner?" C. "What would you like to drink?" D. "When did your illness originate?"

**Math**

I kinda get it but what is the answer?

**Statistics**

In advance of the 1936 Presidential Elections, a magazine titled Literary Digest released the results of an opinion poll predicting that the republican candidate Alf Landon would win by a large margin. The magazine send post cards to approximately 10,000,000 prospective voters...

**Physics**

Consider a cloudless day when the sun shines down across the United States. If 2375 kJ of energy reaches a square meter (m2) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,...

**College Physics**

A cyclist is at rest at a traffic light. When the light turns green, he begins accelerating at 2.56 m/s2. How far does he go after the light turns green until he reaches a cruising speed of 10.88 m/s?

**PLEASE HELP WITH CALCULUS 1 - ITS REALLY URGENT**

ummm could you please be more specific?

**PLEASE HELP WITH CALCULUS 1 - ITS REALLY URGENT**

Velocities of the 2 cars during the race are given in the tables below where velocities, v are in miles per hour and times t are in seconds. Sappho's car: time: 0 1 2 3 4 5 6 7 8 9 10 velocity:0 20 35 48 62 75 85 93 99 106 111 Homer's car: time: 0 1 2 3 4 5 6 7 8 9 10 ...

**Calculus - HELP URGENT PLEASE**

yes someone please answer this question

**Calculus - HELP URGENT PLEASE**

Consider a lake of constant volume 12200 km^3, which at time t contains an amount y(t) tons of pollutant evenly distributed throughout the lake with a concentration y(t)/12200 tons/km^3. assume that fresh water enters the lake at a rate of 67.1 km^3/yr, and that water leaves ...

**financial management**

Tribke Enterprises collected the following data from its financial reports for 2012: Stock price $18.37 Inventory balance $300,000 Expenses (excluding COGS) $1,120,000 Shares outstanding 290,000 Average issue price of shares $5.00 Gross margin % 40% Interest rate 8% TIE ratio ...

**computer**

To set up Automatic Backup on your computer, what option would you choose from the Word Options screen?

**Calculus - HELP URGENT PLEASE**

The region R is bounded by the x-axis, x=2 and y=x^2. Which of these expressions represents the volume of the solid formed by revolving R about the line x=2?

**Chemestry**

Question 1) Consider the following reaction of calcium hydride (CaH2) with molten sodium metal:CaH2(s) + 2 Na(l) -> 2 NaH(s) + Ca(l) Identify the species being oxidized and the species being reduced? Question 2) Give the names to the binary compounds listed below. Classify ...

**english**

Whats another way to say "no human rights.." My sentence is starting with "In order to solve.."

**French SraJMcGin**

My question is.. when i make up these sentences.. how can i make sure that when translated it, it will have the subjonctif

**Physics**

A 2000 kg car pushes a 3000 kg truck that has a dead battery. The ground pushes forward on the car with a force of 6000 N. What is the magnitude of the force that the truck exerts on the car? Ignore any friction forces. My work/attempts: I've drawn a for body diagram for ...

**Chemistry**

im very stuck on finding r

**world history**

Which of these was NOT a shared trait of early Harappan and Mesopotamian civilizations?

**medical**

It also said that everything else was normal, such as weight and blood pressure

**medical**

For this assignment, I have to diagnose a list of patients. 1. 14 year old female feels a tightness in her chest when she gets nervous. Also, she starts wheezing when she exercises while being nervous as well as feels a sharp pain in stomach region. I believe this girl has a ...

**Math (PLEASE HELP!)**

1. Suppose the height, h, in feet, of a trampolinist above the ground during one bounce is modelled by the quadratic function h(t) = -16t2 + 42t + 3.75 . For what period of time is the trampolinist at least 22 ft above the ground? Round your answers to the nearest hundredth. (...

**physics**

ok i will do that. thanks for the help!

**physics**

i did delta L = (alpha)(initial L)(delta T) delta L = (12E-6)(58.5)(55.7) = 0.0391 m and i got it wrong. i tried that answer as negative too and it was still wrong. so does anyone know where i went wrong? i REALLY appreciate that help!!!

**physics**

i wanted to post the exact question so people will have all the information. and i am sorry for making anyone angry. i don't want it done for me, i just want what formulas to use. thanks to anyone/everyone that answers!! :)

**physics**

A steel section of the Alaskan pipeline had a length of 58.5 m and a temperature of 18.0 °C when it was installed. What is its change in length when the temperature drops to a frigid -37.7 °C?

**physics**

The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 29.0 °C the air gap between the rods is 1.93 x 10-3 m. At what temperature will the gap be closed?

**physics**

A copper kettle contains water at 29.1 °C. When the water is heated to 86.6 °C, the volume of the kettle expands by 5.56 x 10-5 m3. Determine the volume of the kettle at 29.1 °C.

**physics**

Ideally, when a thermometer is used to measure the temperature of an object, the temperature of the object itself should not change. However, if a significant amount of heat flows from the object to the thermometer, the temperature will change. A thermometer has a mass of 31.8...

**physics**

An ice chest at a beach party contains 12 cans of soda at 4.56 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 6.54-kg watermelon at 28.5 °C to the chest. The specific heat capacity of watermelon is nearly ...

**physics**

Two bars of identical mass are at 29 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/(kg · C°). When identical amounts of heat are supplied to each, the glass bar reaches a temperature of 92 °C, ...

**physics**

How much heat in joules must be added to 0.413 kg of aluminum to change it from a solid at 122 °C to a liquid at 660 °C (its melting point)? The latent heat of fusion for aluminum is 4.0 x 105 J/kg.

**physics**

A thick, vertical iron pipe has an inner diameter of 0.070 m. A thin aluminum (α = 23x10-6 (C°)-1) disk, heated to a temperature of 89°C, has a diameter that is 4.4x10-5 m greater than the pipe's inner diameter. The disk is laid on top of the open upper end of...

**STATISTICS**

Find the approximate 84th percentile of the pig pregnancy length distribution

**chemistry**

Describe the difference in intermolecular forces between the two molecules. How does this affect the properties of the substance first one molecule is made up of H3C,OH,CH3, and another CH3. The second molecule is made up of H3C,O,OH3, and CH3.

**science (cladogram)**

Oh! and thx San for the response. It help me understand the question better. Thx ;)

**science (cladogram)**

If the dude was going to pretend to be someone he could have at least spelled Mrs.Sue name right. It is mRs.sue. He clearly forgot the r. It was ov. he was a fake. Trust me, I'm sure Mrs.Sue wouldn't curse a child.

**physics**

Please help! I want to make sure my answer is correct. Q:A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95 x 10^6 N. What is the average ...

**English**

What is the significance of Catherine Earnshaws ghost in Wuthering Heights?

**math**

Mike has a tree 58ft long and wants to cut it into 24 equal pieces. How long would the pieces be?

**Art**

I double checked @m1538 and he or she is right. S0 if you are looking to see if it is right it is.

**geomotry**

In Triangle ABC, AC = BC and mC = 62°. The longest side of the triangle is:

**French**

Does France have "White House?"

**algebra**

Alonzo wants to buy a bike for $260. He can pay for it in 8 months if he pays $60 now and $25 each month. If he were to pay $60 now and $20 each month, how many more monthly payments would it take to pay for it?

**Math**

. At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and 2 people finished in...

**Calculus**

h(x) = x+cos(ax) is a family of functions where a is a positive constant such that 0<a<4. Which values of a make h(x) strictly decreasing? Justify your answer. I can't figure this out and help would be appreciated. Thanks in advance!

**Calculus**

h(x)= x + cos(ax), where a is a positive constant such that 0 < a < 4. For what values of a will h(x) have a relative maximum at x=1? So I found the derivative and got h'(x) = 1- asin(ax). Then I plugged in 1 for x and set the derivative equal to zero, so I have 1 + ...

**Calculus**

I made a typo. The derivative is 1+ a sin(ax), sorry.

**Calculus**

h(x)= x + cos(ax), where a is a positive constant such that 0 < a < 4. For what values of a will h(x) have a relative maximum at x=1? So I found the derivative and got h'(x) = 1- asin(ax). Then I plugged in 1 for x and set the derivative equal to zero, so I have 1 - ...

**Algebra**

The following equation is quadratic. f(x)=(x-7)(3x-2) What are the x-intercepts of the graph of the related equation y=(x-7)(3x+2)? A) -7 and 2/3 B) -7 and 3/2 C) -3/2 and 7 D) -2/3 and 7