# Calculus - not sure if my work is correct?

72,720 results, page 410

### Physics

A 0.15kg baseball pitched at 30 m/s is hit on a horizontal line drive straight back at the pitcher at 46.0 m/s. If the contact time between bat and ball is 5x10^-3 s, calculate the force (assumed to be constant) between the ball and bat. [Hint: impulse!] I did FΔt = Δ...

### 7 grade fraction word problem

I am a mom that can't figure out how to help my daughter with this problem. Alicia is making pies. She uses 1 1/2 cups of sugar for every 2 pies. She has 5 1/4 cups left. How many more pies can she make? I think the answer is 7 pies but not sure how to teach her how do figure ...

### Physics

If you take a pendulum clock from Paris to Cayenne, French Guiana, it loses 2.5 min each day. If the period of a pendulum of given length is proportional to 1/sqrt(g), and if g = 980.9 cm/s^2 in Paris, what is g in Cayenne? ...Um...I'm not entirely sure where to start. Do I ...

### Physics 11

Waves traveling along a string have a wavelength of 2.4m. When the waves reach the fixed end of the string, they are reflected to produce a standing wave pattern. How far from the end are the first 2 antinodes? I feel like I don't have enough info here... I know that 1 ...

### Career Plans

What are some career plans to do with science? I really enjoy chemistry and geology. What are some career plans to do with English? Socials? I like math, but I don't like pre-calculus, I can do some bits of algebra, what does a civil engineer need?

### Calculus

A pendulum swings through an arc length of 1120 cm (Swing #1). With each further swing, the arc length is reduced by 15 % State the growth factor. Calculate the length of the arc in swing #5 I think im supposed to use this formula again, but I don't know how to use it. Tn = ar...

### Calculus

A bright light on the ground illuminates a wall 12 meters away. A man walks from the light straight toward the building at a speed of 2.3 m/s. The man is 2 meters tall. When the man is 4 meters from the building, how fast is the length of his shadow on the building decreasing?

### Calculus

A bright light on the ground illuminates a wall 12 meters away. A man walks from the light straight toward the building at a speed of 1.2 m/s. The man is 2 meters tall. When the man is 4 meters from the building, how fast is the length of his shadow on the building decreasing?

### written communication

plan for interview for a job you would like to have. Consider how you might manage the resume, job-application letter, follow-up letter, and interview. Create a table that lays out a day-to-day plan to use as a job aid for your employment search that spans 3 weeks. Please note...

### algebra

Consider the following four polynomials, labeled A - D: A. ( 2x2 - 4x ) B. ( x3 - 1 ) C. ( -3x3 + x2 - 4x ) D. ( x5 + x2 - 3 ) Find an algebraic expression that uses each of the four polynomials once and simplifies to: x8 + 3 Your expression may involve any combination of ...

### chemistry

Given: Equation #1: 4NH3(g) + 5O2(g) = 4NO(g) + 6H2O; ΔH of reaction = -1170 kJ Equation #2: 4NH3(g) + 3O2(g) = 2N2(g) + 6H2O; ΔH of reaction = -1530 kJ Then what is the ΔH of reaction for: N2(g) + O2(g) = 2NO(g)? Enter a numerical value below and be sure to ...

### Physics

Please help. To cool a hot bath containing 50L of water at 50 degrees Celsius down to 20degrees Celsius, what volume of cold water at 5 degrees Celsius would be needed? (in litres) and what mass of ice at 0 degrees celcius would be needed? i'm thinking about using q=mcdeltaT ...

### Calculus

A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 2 feet per second. How fast is the top of the ladder moving down the wall when its base is 7 feet?

### 7th grade LA

Could you check my answers? Maybe recommend a good website for help. Label independent clauses, dependent clauses, FANBOYS. Then decide sentence structure (simple, compound, complex, compound complex). 1. When you go to school, you have to go to homeroom first. dependent: when...

### Algebra 2

I've got some homework about ellipses and I am not sure if I am doing these right. So if you could check my answers I would appreciate it. Thanks!! 1.) Write an equation for an ellipse if the endpoints of the major axis are at (1,6) and (1,-6) and the endpoints of the minor ...

### Revolutionary War Letter

It is 1776. Write a three to five paragraph letter to your sister in England explaining your decision to participate in the rebellion against Britain. Be sure to list three reasons for your support of the rebellion against Britain and include any reasons you could sympathize ...

### American Literature

Which virtue on Benjamin Franklin's list do you think is least important?Why? I think that if i had to pick out of the thirteen virtues, industry would be least important. But im not really sure how to explain why its least important. All of the virtues seem really important ...

### chemistry 12

Calculate [H3O^-] in a 0.15M solution of benzoic acid, HC7H5O2(aq) having a Ka of 6.4 x 10^-5 I got. 6.4x10^-5=(x)(x)/0.15 6.4x10^-5= x^2/0.15 6.4x10^-5 x 0.15 = x^2 square root of 9.6x10^-6 = square root of x^2 x= 0.003098 The pH solution is -log [0.003098] = 2.50 b.) ...

### Criminal Justice/Judicial System

History makes it clear that the federal bench has attracted people from a fairly select demographic, usually the __________ and __________ classes. A. lower upper; upper upper B. upper middle; upper C. middle; upper middle D. lower; middle I think it's D, but not sure.

### would someone please check this math

1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple of 3, 6, 9 answer 18...

### Math

Describe whether the following statements are true or false and explain. A. If n(A)<n(B), then A is a proper subset of B. B. If n(A) is less than or equal to n(B), then A is a subset of B. C. If A is a proper subset of B, then n(A)<n(B). D. If A is a proper subset of B, ...

### probability

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

### probability

A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

### math

George has been hired to paint the smith's house. He needs to be sure his ladder will reach the highest part of the house, so he decides to use the shadow method. The measuring stick is 3 ft., and tits shadow is 5 feet. The shadow of the house is 45 feet. The shadow of the ...

### calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 18 knots and ship B is sailing north at 22 knots. How fast (in knots) is the distance between the ships changing at 4 PM?

### calculus

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 17 knots and ship B is sailing north at 23 knots. How fast (in knots) is the distance between the ships changing at 3 PM?

### Pre Calculus

sec x = -2 , π ≤ x ≤ 3π Use a calculator to solve for x in the given interval 9)sinθ=0.1473, 0°≤θ≤90° A) -8.47° B) 8.38° C) 98.47° D) 8.47° 10) cosθ=0.7563,0°≤θ≤90° A) 37.10° B) 49.14° C) -49.14° D) ...

### Calculus

A government bond is bought for $5000 on June 1, 2010. The value of the bond increases each year by 3.9% of the previous year's value, and the bond matures on June 1, 2030. Determine the value of the bond at maturity

### Calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 24 knots. How fast (in knots) is the distance between the ships changing at 3 PM?

### Calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 24 knots and ship B is sailing north at 19 knots. How fast (in knots) is the distance between the ships changing at 6 PM?

### Pre Calculus

The doubling period of a baterial population is 10 minutes. At time t=80 minutes, the baterial population was 50000 1What was the initial population at time t=0 2Find the size of the baterial population after 4 hours

### Pre Calculus

Assume that x, y and a are positive numbers. Use the properties of logarithms to write the expression loga x ^6y ^7 in terms of the logarithms of x and y. a. 42loga^x+y b. 42loga^x+7loga^y c. 6loga^ x + 42loga^ y d. 6loga^x+7loga^y e. 6loga^x+6loga^y

### calculus

The height (in feet) attained by a rocket t seconds into flight is giving by the function h(t)= -1/3t^3 + 16t^2 + 33t + 10 When is the rocket rising? When is the rocket decreasing? when does it reach its maximum height above the ground? what is the maximum height? what is the ...

### Calculus/Algebra

Let the demand and supply functions be represented by p=D(q) and p=S(q), respectively, where p is the price per item in dollars and q is the quantity of items. D(q) = 42-.03q S(q) = .02q -20 Find the equilibrium price. Hint: you will first find the equilibrium quantity (q) and...

### math

please help thx 16-3(8.3)^2-5 and please show me steps thx. i have it figure out but i want to know if its correct thx

### English

1. Crisp Crackling Crusts 2. Crispy Crackling Crusts (Which one is correct? Are both OK? What is the meaning of 'crackling'")

### English

Which of the following is the correct way to cite a scene from Hamlet? Hamlet I.iv.12-14 Hamlet I. 4.12-14 Hamlet 1.iv 12-14 Hamlet 1.four.12-14 my answer Hamlet I. 4.12-14

### English

1. He scored 98 % in/on the English test. 2. He scored 98 points in/on the English exam. (Which expression is correct? Do we have to use 'in' or 'on'?)

### ALGebra Simplify

I cant figure this out 6 /2 * 8-8 /2 i got 6/2 * 8-8 /2 3*8 4 24 -4 = 20 is this right way? 29 - (3+5) *2 +3 i got 16 is that right? 5-[6+3(-40/8) + (-2)exponent 2 i got 9 x5 = 45 + 4 = 5 -49 = -44 is that correct?

### trig

what is the correct answer in proving trigonometric identities if tan theta cos^2 theta + cos^2 theta

### grammar

Mix the egg yoke. or Mix the egg yokes. PS: ( there are more than one egg) Which sentence is correct?

### Grammar

Extra practices help her be solid on new concepts. Is the sentence correct? And ( "on new concept") or ("in new concept")

### math

Pool length (m) 9 Depth of pool (m) 1.6 Pool length (ft) 29 Is it correct to write that 9m (metric system) is 29 feet

### math

Andrew has $40. He wants to buy a $15 cd and as many $6 posters as he can. What is the greatest number of posters he can buy? I did 40>or=15+6x -15 to each side 25/6> or=6x/6 4.17> or = x so he can buy 4 at most Is this correct? Thanks

### science

Vanadium has several oxidation states. write correct formulas for vanadium oxide and vanadium oxide.

### Derivatives

G(t)=5200/(1+12e^(-.52t)) Find G'(t) I keeo getting (-32448e^(-.52t))/(1+12e^(-.52t))^2 Is this correct?

### math

the ratio of boys to girls is 7:8 How many boys are there in school if there are 968 girls? My answer is 581 boys is this correct??

### English

1. Do you know? Who is the tallest student? 2. Do you know who the tallest person is? 3. Do you know who is the tallest person? ---------------------------- In #1, there are two sentences. When they are combined, which one is correct, #2 or #3?

### Chemistry

HI is formed from the overlap of a hydrogen 1s orbital with an iodine 3p orbital? is that correct? I am having trouble with the iodine orbital, thank you.

### Math+ check!

oka so the question is as follows: for the geometreic sereis 8+48+288+... find the sum of the first ten terms, s 10 so I would use the formula: sn= a(1-r^n)/ 1-r were a= 8 r= 48 n= 10 8(1-(48)^10)/1-48 I get lost I don't know how to arrive to the answer from here! but is the ...

### Health

Intense physical activity that requires little oxygen but uses short bursts of enery is what? anarobic Ken's answer is correct, but his spelling is wrong — anaerobic. Probably just a typo. I hope this helps a little more. Thanks for asking.

### Communications

Rewrite the following sentences, focusing on the grammar area specified in the left column. To enter your answer, click next to the number and begin typing. If the sentence is already correct, write No Change. Punctuation within Sentences—Colon

### spanish

Hello, For the play fuente Ovejuna I have to answer this question Which Characters in the play are based on real historic figures? For my answers I put Fernan Gomez, Queen Isabella, King Ferndinand, and Rodrigo Tellez Giroza. Is this correct? thanks

### English

I'm writing a review and want to say that "xxx is what pushes the story forward" but with a more elegant and correct formulation. English is not my first language so I don't know all the expressions and such but I think that there is a proper expression for that. Would be kind...

### Chemistry

I was reviewing chem equations online. This one site said this is a balanced equation. I don't see why there are 13 oxygens! thirteen times two would equal 26, and there aren't 26 oxygens on the other side. Who's correct and why? Thank you for your help. 4C2H5F+13O2=>8CO2+...

### poetry

Question? How do the poetic elements increase my appreciation of the story."The Cremation of Sam McGee". answer: The perfect rhyme and meter come through perfectly.The vivid descriptions,make me read it again to grasp the details. Can you correct my answer?

### French

Is this correct? Nous avons besoin d'preillers pour faire un château-fort. Alles à la cuisine. We need pillows to build a castle/fort Oui, je trouverai les oreillers. Is it pronounced as or-ray-lay? Merci beaucoup!

### Health-Reimbursment Methologies

Under Major Medical Insurance, $250.00 Must Be Paid Before The Company Assumes Liability. Who Is Responsible For Paying The $250.00? I think is The A. policyholder. Is this correct. Or B. The insurer. C. The provider. D. The third-party payer? Thx.

### College Physics

copute the power output of a machine that lifts a 500 kg crate through a height of 20.0 m in a time of 60.0 s . book answer is 1.63 kw can you help me plug the numbers into the correct formula to use. then i should have no problem doing the other problems i have to do. thanks

### math

Theses are just some problems i did not understand how to do so if you could please explain and write the answer(: anything helps thank you(: 2. Simplify ---(3x^11z^5)^3 b. (3x^5)^ -3 / 2x-5(3y)^4 c.3x^5)^ -3 / 2x ^ -5(3y)^4 (same as b but - 5 is the exponent) 3a.x^2 / 5 + x-5...

### Math

Could someone tell me if I am correct on this question? Laurie expects to make 100,000 in 2007.Her Social Security tax rate is 6.20% up to the wage base.Medicare is 1.45%.How much FICA is Laurie excepted to pay for the year? $7,495.00 for my answer

### physics

The velocity of a diver just before hitting the water is -8.4 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement during the last 0.82 s of the dive? This problem with different numbers has been done on here before, but when i ...

### math

if csc= -7/10 and cos >0. a) draw a triangle in the correct quadrant with three sides properly labled. b) find the exact value of 7cot- 4cos. This means no decimals. find a common denominator and rationalize all denominators. simiplify completely.

### math

if csc= -7/10 and cos >0. a) draw a triangle in the correct quadrant with three sides properly labled. b) find the exact value of 7cot- 4cos. This means no decimals. find a common denominator and rationalize all denominators. simiplify completely

### MATH

if cscè= -7/10 and cosè >0. a) draw a triangle in the correct quadrant with three sides properly labled. b) find the exact value of 7cotè- 4cosè. This means no decimals. find a common denominator and rationalize all denominators. simiplify completely

### ENGLISH SENTENCE CHECK

IS MY SENTENCE CORRECT AND WORDS USED RIGHT?? What does it mean to tie the knot of renunciation? It means all the promises made to one another by a couple in the marriage ceremony have been broken; therefore, they choose divorce.

### Psychology

Is this the correct answer? Please help! If a person believes that his or her mind is being controlled by outside forces or that he or she is getting special coded messages from the television, this person is experiencing which type of psychotic symptom? I choose D a. insanity...

### english

Edit the following sentences to correct misplaced or awkwardly placed modifiers. Revisions of lettered sentences appear in the back of the book. The flood nearly displaced half of the city’s residents, who packed into several overcrowded shelters.

### Grammar..

1. Is this correct (grammatically)? I bought bananas, strawberry, honey, and some books. ( also are the commas placed correctly?) (And do you call punctuations in English mechanics?) 2.Do I use the word "had" to emphasize something? Ex: The communist had transformed their ...

### grammar

the music is so cheerful that it ___1___ you to hum or whistle along. if you can't carry a tune, you will be ____2____ time to the music. in his teens he was ____3_____ orchestra. using the correct verb form, (force, direct, tap) i think it is 1) forces 2)directing 3)tapping

### Chemistry -- DrBob222

A gas initially at STP is heated to 50°C keeping the volume constant. What is its new pressure? I used this formula: P1 = 1 atm T1 = 273 K T2 = 323 K solve for P2 P2 = P1 (T2/T1) But, where do I use the 50 degrees C? Also, is my answer correct: P2 = 1atm x 323K/273K = 1.18 atm

### Personal Dimensions of Education

Select the correct form of the verb provided to correctly complete the sentence. This week’s “Steal of the Week” claims that there _____ hotel specials available in Las Vegas for $18.00 a night at several of the five star casinos. is are

### Statics

A former student of mechanics wishes to weigh himself but has access only to a scale A with capacity limited to 100 lbs and a small 24-lb spring dynamometer B. He discovers that when he exerts a pull on the rope so that B registers 22 lb, the scale A reads 80 lb. What is his ...

### Human Growth

Which one of the following functions is not performed by the placenta? A. Combating internal infection B. Producing hormones that support the pregnancy C. Giving the developing baby immunity to various diseases D. Producing morphogens that cause cell transformation. I choose c...

### Social Studies

XYZ Gaming Inc. Wants to invest in some new goods to raise it's overall productivity. Which of these would be the best choice? Bigger desks for workers -- Faster Internet Service -- (Correct!) -- A new lunchroom -- Health training for employees --

### English

Match Each word by definition by filling in the correct letter. Word Bank a.) Wise b.) Deceptively Charming c.) Enormous d.) Passion e.) Sound; fit f.) Competing g.) Awe-inspiring h.) Sinister; threatening 1.) Ardor d 2.) Sage a 3.) Contending g? 4.) Prodigious c 5.) Foreboding h

### Engish

Despite brawls caused by drunken fans, it is virtually impossible to eliminate alcohol from baseball stadiums. A major reason is that the key sponsors of baseball games are beer manufacturers such as Coors, Miller, and Busch. This is a Cause and Effect is this correct.

### English

in the opening scene Prince escalus is referring to whom when he says "rebellious subjects, enemies to peace,profaners of this neighbor-stained steel" A:Romeo and Juliet B:Lord Capulet and Lord Montague C: Tybalt and Mercutio I Say B is this correct? Thank you

### Social Studies

Michael appears before a judge and is sentenced to six months of probation and a $250 fine. Which of the following crimes is Michael most likely to have committed? A. Kidnapping B. Arson C. Selling drugs D. Shoplifting Is the correct answer D?

### fine arts

can anyone please paste a link to where i can find a good relief carving, but be sure that the artist's name, title of the artwor, and the date the artwork was completed is shown. thanks alot just paste the link of which site you found it on, or which specific place on a site...

### ap chemistry

some reactions that are considered to be spontaneous at low temperatures will not proceed at a measurable rate or form any measurable quantity of products for several hours, days, or years. a. explain why this is. b. will the addition of a catalyst alter the value of delta "G...

### english

I wrote this for my class and I just want to make sure I have it right. The role of education plays a very big part in the financial world. It's a big part of becoming successful. It can help with learning basic math skills in order to better your finances. It can also help ...

### physics help please

Two speakers are driven by a common oscillator at 870 Hz and face each other at a distance of 1.20 m. Locate the points along a line joining the two speakers where relative minima of pressure amplitude would be expected. (Use v = 343 m/s. Choose one speaker as the origin and ...

### Psychology

Dr. Gillian explained that research has identified over 25,000 genes that are responsible for the genetic information that progresses from generation to generation. These genes are: a. telomeres which cap the chromosome. b. located in a specific order along the axon of the ...

### English

I am trying to write a thesis statement for a research paper I have to write. The paper is over C. Diff this is a disease. Here are my ideas I am just not sure that either are even written correctly. 1. Deaths caused by Cloustridium Difficiule are preventable. 2. Simple ...

### social problems

analyzing cultural traits and items. kinds of foods and eating patterns differ in other cultures. for ex. in many parts of the world people use only their right hand to eat. investigate an area of the world in which you are interested and compose a report on the foods eaten ...

### Health

I have to create a nursing case study. I have everything I need, but am not sure how to present it. Details: 67 year old causcasain male diagnosed with emphysema returns with shortness of breath, etc. supposedly associated with CHF. Have to have everything including ABCD ...

### English

In which one of the following sentences is the number written correctly? A The college has an endowment of more than $187 million. B The parcel of land was advertised as two hundred forty-three and three-quarters acres. C One hundred and thirty-two people lined up to buy the ...

### education

prepare and submit a proposal to bill that gives your suggested solution to his business plan. provide bill with the details of what he needs to purchase in order to have what he needs to conduct his business using today's technology, make sure you include the following items ...

### APUSH

Hi this is my essay prompt for APUSH. I am a little confused about this prompt. I don't really know where to start. Also I'm not sure what my 3 body paragraphs should be about. If you could help me with this it would be great. Thank you Sydney Why would former slaves and ...

### Physics

A. A 45kg gymnast launched herself from a vault with a speed of 1.8m/s.she lands upright on the ground 125 cm below at what speed will she hit the ground? B. On landing she bends her knees through a height of 0.15m. Detained the average force exerted by her legs during the ...

### Biology

Questions 109-111 refer to the map below of the distribution of several populations on the continents of Eurasia and North America. These populations were derived from a common ancestral species. The area enclosed by a given dotted line represents the distribution of the ...

### Honors French 2

yeah..I have to write about a famous French person. What was Napoleon Boneparte's effect on the society and world at the time(monde du temps not sure what the right translation is) Thank you for using the Jiskha Homework Help Forum. First of all "monde du temps" means "the ...

### Math

-4 is less than 12+x (Idon'y know how to make the less than sign on the computer) I've subtracted 12 form each side and I get -8. What am I doing wrong? 2m-5=17 I added 5 to each side and get 22. Then divide by 2 get 11. Is that coeerct? -4 < 12 + x -16 < x You did not ...

### Chemistry

"There are two ions per formula unit in this compound. The -1 anion has 8 more electrons than the cation." I need to find the Chemical formula/name. Any suggestions on how to start? This can have more than one correct answer.

### college

Biographical information blanks are difficult for applicants to fake because A. the questions don’t have predictable, correct answers. B. they require detailed answers. C. they’re administered by extremely knowledgeable interviewers. D. applicants are required to respond ...

### Chemistry

Calculate the wavelength of the yellow light emitted by a Sodium Lamp if the frequency is 5.10 X 10^14 Hz. Formula: Wavelenght (lamda)= speed of light, 3 X 10^8(c)/frequency, 5.1 X 10^14. My answer was 5.9 X 10^-5. Is this anywhere near correct? Please explain the steps if I'm...

### accounts tax

what is the correct VAT payable for a hi-fi unit costing £255.55 less trade discount of 10 and cash discount of 4 if paid within 14 days-delivered by courier at an agreed charge of £25.00 the courier charged the supplier £19.50?

### spanish

is this correct? "¿Tenían Uds. muchos animales cuando eran niños?" "¡Por supuesto! Teníamos _____." a. tortugas y vecinos b. pajaros y dinosaurios c. peces y columpios d. peces y tortugas B?--bird and dinosaur