Posts by emily

Total # Posts: 3,100

math
Explain why sqrt(a+b) does not equal sqrt a + sqrt b, for a>0 and b>0?

math
Vernon Wells hits a baseball that travels for 142m before it lands. The flight of the ball can be modeled by a quadratic function in which x is the horizontal distance the ball has traveled away from Vernon, and h(x) is the height of the ball at that distance. Assume that the ...

Ratios
21

Ratios
A group of students surveyed chose baseball and soccer as their favorite sport in the ratio 3 to 8 if 56 students chose soccer as their favorite sport find the number of students that shows baseball is the favorite sport 132 students were surveyed

physics
An ice cube at its freezing point is placed in nested Styrafoam cups which contain 240 g of water at 21.5 °C. If the final equilibrium temperature when the last trace of ice melts is 25.0 °C, what was the mass of the ice cube?

physics
A 24.0 g metal cube at 85.5 °C is placed into a calorimeter containing 125 mL of water at 20.0 °C. The final equilibrium temperature of the metal cube and the water in the calorimeter is 24.8 °C. Determine the specific heat of the metal

physics
A liquid absorbs 45 kJ of heat, and its temperature increases from 305 K to 315 K. Determine the heat capacity of this liquid.

physics
An aluminum block absorbs 1.0 x 104 J of energy from the Sun when its temperature increases by 5.0 °C. What is the mass of the block? the specific heat capacity of aluminum is 920

math
Show that a function f(n)= 2n^3+n^2+6n+3 always produces a number that is divisible by an odd number greater than 1, for any natural number, n. 2n^3+n^2+6n+3 = n^2(2n+1) + 3(2n+1) = (2n+1)(n^2 + 3) what's next?

math
I do not know.

math
Show that a function f(n)= 2n^3+n^2+6n+3 always produces a number that is divisible by an odd number greater than 1, for any natural number, n.

Physics
At what temperature, in degrees Celsius, is the speed of sound in air 341 m/s?

Writing
Thank you so much for your feedback! I will clarify and add the terms, and also find the verb. Again, thank you, I know that this was a lot and time-consuming!

Writing
Unfortunately, Grammarly only gives you help with little things, so if there was a major problem, it won't tell me what it is until I pay an arm and a leg. I do appreciate your help, this is actually my college class' final! I had to transcribe a five-minute video, ...

Writing
Hello! I was on here the other day asking about how I should write up an analysis of a conversation with a four-year-old boy, and I was hoping I could have some help with the grammatical aspect of the paper? Would you mind if I post my analysis here and you read through to see...

Writing
Unfortunately, this assignment is actually my final. The professor is pretty nice, but he assigns difficult work. I really appreciate your help/advice, I will definitely look at the links you provided! :)

Writing
I had to make a transcription by the second for the 5 minute video. Once I did that, I had to analyze his morphology, phonology, syntax, and lexicon.

Writing
Hello! I need some help on how to write my (1000-1500 word) analysis paper. My class is about language acquisition in children and I had to analyze a child's spontaneous conversation. I have analyzed it, but I'm unsure of how to write it up. Please help! Thanks!

Physics
A flywheel has a constant angular acceleration of ?0.84 rad/s^2. What is its angular velocity 15 s after its angular velocity is 5.0 rad/s?

algebra
what is LCM of 6ab^2 and 3a^2b

Algebra
Change to fractional notation in simplest form using limit or sum of an infinite series 4.234 (34 repeating)

Algebra
Thank you

Algebra
Find the general term in simplest form for the sequence 2,1,-4,7,-10,13,-16. There's an addition of 3 with alternating signs I think but I'm unable to find a general term.

Calculus
So sorry for that!!

Calculus
\$4500 comes up as incorrect :(

Calculus
A rectangular storage container with an open top is to have a volume of 10 m3. The length of its base is twice the width. Material for the base costs \$9 per m2. Material for the sides costs \$150 per m2. Find the dimensions of the container which will minimize cost and the ...

Calculus
It is showing up as incorrect :(

Calculus
A Norman window has the shape of a rectangle surmounted by a semicircle. (Thus, the diameter of the semicircle is equal to the width of the rectangle.) If the perimeter of the window is 20 ft, find the dimensions of the window so that the greatest possible amount of light is ...

Calculus
Find the slope and y-intercept of the line through the point (6,2) that cuts off the least area from the first quadrant.

Algebra
How did you get 12. For example the equation of your new length = l-12 and w-12

Algebra
L × W × H = 3456cm3 L × W = 1500cm2 L= 1500cm2/W The i plugged my second equation into my first one . 1500cm3/W × WH= 3456cm3 H= 2.304cm I did this so far, I'm not sure if it's right and Im confused what to do next

Algebra
A sheet metal fabricator makes boxes from sheet of steel. Each sheet of steel has an area of 1500cm2. 6cm squares are cut from each corner and the edges are bent up to form a box with a volume of 3456cm3.What are the dimensions of each box? I was making my two equations and ...

Algebra
Yess thank you!

Math helppp
As of January 2012, the top three grossing pictures worldwide were Avatar, Titanic and the finalenof Harry Potter series. Together they grossed \$5.9 billion. Avatar earned just \$300,000,000 less than both other movies combined, while Avatar and Titanic together were \$600,000,...

Hellpppp calculus
Solve by elimination. 0.1x + 0.3y = 1.5 0.6y + 0.2x =-1.2

physics
A 9800 kg rocket is travelling east along a horizontal fricitonless rail at a velocity of 11 m/s. The rocket is then accelerated uniformly to avelocity of 22 m/s in a time of 0.75 s by the expulsion of hot gases. What is the average force with which the gases are expelled by ...

Social Studies
The Bill of Rights promises that punishment for a crime cannot be cruel or unusual, meaning that it cannot be painful or degrading to the person's dignity. What punishment would be considered cruel and unusual. Someone who commits assault is beaten as punishment. Someone ...

Geography
1. Which pair of basic question guides geographers in their work (1 point)

Chemistry
How would the following affect the calculated value of neutralizing power of antacid (make it higher, lower or no effect)? [The lab uses the back titration technique] 1) The solution mixture of reacted antacid and excess of HCl spattered out the flask during boiling 2) The ...

physics
A toy car (200 g) moves by shooting a plastic ball (50 g) horizontally out the back. The average acceleration of the car is 1.2 m/s2 [E] and there is negligible friction acting on each part of the toy. (a) Draw an FBD for each object. (b) Identify the action and reaction ...

Chemistry
Calculate the volume and mass required to make 100 mL of 0.10 M solutions of your assigned acid and conjugate base. Assigned acid and conjugate base: Ammonium chloride- 53.49 g/mol Ammonia- 1.0 M

Writing - College
Hello! I am in need of some assistance, please! I have to write a personal response essay based on an interview I conducted, and it needs to be between 1,000 to 1,500 words. I was actually here just the other day, asking for help on how to lay out the interview bit! Anyhoo! ...

Writing - Junior in College
Thank you, I appreciate the help.

Writing - Junior in College
**The class is "Communication Development in Children" if you wanted to know!!

Writing - Junior in College
Good Evening! I am currently struggling to write an...essay of sorts... on an Interview that I held with a child's father. The class is all about language acquisition in children and I don't know how to write up the interview! Any help you can give would be greatly ...

World History
How are religion and culture connected in Ancient India and China? Please help, I'm so stuck on this!!

AP Environmental Science-Ecosystems
1. What are the physical products of cellular respiration? a. Oxygen and carbon dioxide b. Nitrogen and carbon c. Glucose and oxygen d. Glucose and water e. Water and carbon dioxide 2. If the biomass of flowers that support the butterflies was known to contain 100,000 units of...

social studies
why does the colonists have needed help to find and grow find?

physics
15. During the opening kickoff of a college football game, the kicker kicks a football with an initial velocity of 27.5 m/s at an angle of 41° above horizontal. I. What is the time of flight for the ball? II. How far does it travel before hitting the ground? III. What is ...

physics
14.To test the durability of a new shock-proof camera, the company has the camera dropped from a height of 15.0 m. Assume air resistance is negligible. How long does it take for the camera to hit the ground? What is the speed of the camera just before it hits the ground?

Math
If cereal is 2/3, pretzels is 2/5, nuts are 1/5. Ok so you would add them up. 2/3 + 2/5 + 1/5 = well that is your answer. it will not be a answer if their is not a label.

Math
A snack mix contains toasted oat cereal, pretzels, and nuts in a ratio of 2:2:1 by mass. What mass of each ingredient is needed to make the following amounts of snack mix? a)330g b)210g c)500g d)750g

physics
A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to hitting the floor? I need...

physics
I don't get this. I need to use one of the five key equations for motion with uniform acceleration.

physics
A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to hitting the floor?

math
Can you show me how to convert 39.5 feet into yards, feet, and inches or 47 tsp into gallons, quarts, cups, tbsps, and tsps

Biology
Stomach acid or Gastric acid is a fluid secreted by the Gastric gland in the stomach.. Its main consituent is HCl hydrochloric acid. The pH vary,from 1.5 to 3.5. HCl is secreted by oxyntic( or parietal).. Due to its secreation, the proteins lose its three dimensional structure...

math
127nine= 411x solve for x can you show me the steps please

math
convert 689 base 10 to base 3. Can you please show me this step by step

Math
write a number in which 5 has the place value thousand, 3 has the place value hundred, and 0 has the place value unit

math
Tyler used 2989 digits to number the pages of a book. How many pages does the book have? I know that pages 1-9 use 1 digit, total number is 9 Pages 10-99 use 2 digits, total number is 180 Pages 100-999 use 3 digits, 900 pages= 2700 with 25 extra pages Can you help me from here

SCIENCE
In a reaction 6.56g of Zinc reacted with excess dilute Hydrochloric acid Calculate the volume of hydrogen evolved at STP

High school Chemistry
Choose the correct names of the atoms or molecules. Check all that apply Silicium Carbon monoxide Mercurium Hydrogen chloride Iron Boron monoxide Fluorine Sodium trichloride Molybdenum

Physics
A metal sphere has a charge of +7.80?C. What is the net charge after 5.97E+13 electrons have been added to it?

Earth space science
During which step in the Can Crush Lab did water vapor condense inside the can? A. The can was filled nearly to the top with water. B. The can was placed on the hot stove burner for several minutes. C. The can was removed from the hot stove burner. D. The can was placed upside...

Math
D? I know it wouldn't be A because its not the same

Math
Is it 10 times the value of 5 to the left? My choices are A. the same value as B. 1/10 value of C. 10 times the value of or D. 100 times the value of?

Math
In the number 45,569, the 5 in the hundreds place is _________________ the 5 to its left.

English
A mystery admirer from Ian's office sent the bouquet of flowers. Find the subject and verb.

math
when the reciprocal of the larger of the two consecutive even integers is subtracted from 4 times the reciprocal of the smaller, the result is 5/6. find integers.

Math
Exponential Growth It turns out that zombies are created by a virus. In 2025 there are 450 people infected by the virus and the number triples every week. The population of Canada is 3,500,000. How many sees will it take for all of Canada to be infected?

Social Studies
What comparisons do hitler stalin and mussolini have in common and what do mussolini and stalin have in common? I need more than one.

Chemistry
Yes I Believe so

physics
Determine the frequency of the note F4, 5 Seminotes above middle c (C4=261.6Hz) So would it be C4 = 261.6Hz x 1.05946^5 The fact they say semi notes is throwing me off, so I'm not sure if it's right.

physics
Oh wait I see, so then do you use the v=fx so solve for the frequency? Like 2.0x10^8 m/s = 7.0x10^-7 m f And then use that frequency to find the new wavelength?

physics
I don't understand. So is the 35s part not right? Because then you could plug it into the f=1/t formula.

physics
Ohh wait never mind. Would it be TIME = 7.0x10^-7 m / 2.0x10^8 m/s =35s And then you would plug it in as f=1/35s?

physics
Red light with a wavelength of 7.0x10^-7 m travels at a speed of c. When it enters glass it's speed is reduced to 2.0x10^8 m/s. Calculate the wavelength of this redlight in glass. Assume that the frequency does not change. I'm really confused and I'm not sure how ...

Physics
Okay, I see. Thank you!

Physics
An air column that is open at both ends is 1.50m long. A specific frequency is heard resonating from the column what is the longest wavelength and it's associated frequency that could be responsible for this resonance? The speed of sound is 345m/s. So what I did is: v=2L...

AMth
What ratio is equivalent to: 64/256 156/390 204/306 56/84 87/174

chemistry
How would you write the chemical equation for sodium nitrate + isopropyl alcohol. So it would be NANO3 (aq) + C3H8O (aq) -> But I'm not sure how to find the products, thanks for your help!

physics
So I tried this: Mach # = v/sound 3.2 = v/332.22 1063m/s =v Vsound = 331 + 0.61(2 degrees C) =332.22 Would the 1063m/s be the correct answer?

physics
A fighter jet is flying at Mach 3.2 in air of temperature 2 degrees C. What is the planes speed? I really don't understand how to do this question. I'd appreciate your help!

biology
which of the following statements about enzymes is NOT true? A. enzymes work best at a specified pH B. all enzymes have the same shape as their substrates. C. enzymes are proteins D. the shape of an enzyme allows it to do its job. im pretty sure its A. Am i right?

algebra
Below are the functions of y=|x| and y=|x|-5. how are the functions related? A. the functions have the same shape. the y-intercept of y=|x| is 0 and the y-intercept of the second function is 5 B. the functions have the same y-intercept. the second function is steeper than y=|x...

algebra
Thank you!

algebra
write an equation for the line that is parallel to the given line and passes through the given point. y=2x+4: (3,8) A. y=2x+2 B. y=2x+6 C. y=-2x+6 D. y=-1/2+2

Math
A rectangular TV has an area of 1200 square inches. If the longer side is two inches longer than twice the shorter side, find the dimensions (length and height) of this flat screen TV

Math
A rectangular flat screen TV has an area of 1200 square inches. If the longer side is two inches longer than twice the shorter side, find the dimaensions(length and height) of this flat screen TV.

English
Compare Lines 586-87 with those spoken by Satan in Book I: "The mind is its own place, and in itself Can make a Heav'n of Hell, a Hell of Heav'n."

geography
what river flows south Cincinnati ohio

I need help.
Thank you so much bobpursley. Your a life saver!

I need help.
"Write an essay comparing the ways in which these two documents proclaim people's basic rights. How do they reflect the Enlightenment ideas of John Locke?"

I need help.

I need help.
Hi! So, Im suppose to write an essay. But I need to know how does the document of declaration of independence and also the declaration of the rights of men and the citizen talk about the people's basic rights?

Thank you so much!

For number 1 i think the answer is b and for number 2 i think the answer is c

Which statement best describes the effects of the American revolution on women? A. the political rights of women were reduced B. women had to take on many responsibilities C. many women were forced to serve in the army D. the declaration of independence granted equal rights to...

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