# Calculus - not sure if my work is correct?

71,744 results

**Math**

Marcus plays basketball for nine hours each week his friend Louis spends 5/6 as much time playing basketball who plays more basketball? I think you multiply 9x5/6, is that correct?

**Social Studies And Business **

Since no one answered and I NEED IT ASAP 1. Customers cannot purchase every product. How does this fact affect companies that make products? A: They increase costs to make up for low sales. B: They decrease quality to make up for low sales. C: They provide better value so that...

**business studies**

c----of p---- is the different stages that a product has to pass through before they are sold g----d----p-----is the total value of goods and services produced b a country in a year The first one looks like cycle of production, but I'm not sure about it. The second one looks ...

**wxmaxima help math mate!**

one expression is y=log(-100493/40000)x the x is next to the (-100493/40000) same with the other expression y=atan(-100493/40000)x, y=exp(100493/40000x) approximate the region bounded by the given curves. be sure to specify a range of x and y that results in a good picture of ...

**business law**

directors and officers who exploit their positions for personal gain are violating the? a. business judgment rule b.fairness rule. c.insider trading rule d. corporate opportunity doctrine I am fighting between C and D and not sure which one it is. But I am leaning a bit more ...

**Grammar and Composition**

please check these: 1. adamant _e_ 2. pathetic _g_ 3. tangible _j_ 4. auspicious _i?_ 5. altruistic _a_ 6. flippant _c_ 7. incorrigible _h_ 8. indolent _d_ 9. precarious _b_ 10. implicit _i?_ a. unselfish b. uncertain c. impudent d. lazy e. unyielding f. unquestioning g. ...

**Math**

You want to create a box without a top from an 8.5 in by 11 in sheet of paper. You will make the box by cutting squares of equal size from the four corners of the sheet of paper. If you make the box with the maximum possible volume, what will be the length of the sides of the ...

**Math**

Could you please help me with this question? I am not sure how to answer it. Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. The four sided figure has four right angles, it is a rectangle. Shape ABCD has four ...

**government**

The facts of a case a. are largely irrelevant, in that the judiciary has wide freedom with decisions. b. affect which law or laws will apply to the case. c. are important only if the case involves a statutory dispute. d. are important only if the case involves a constitutional...

**geography**

Which country has the largest land area in Europe? In Asia? My answer was - Russia is the largest in both Asia And Europe. Ms. Writeteacher looked and my answer and asked me if I was sure Russia was in Europe. All the maps that I have been looking at show a big part of Russia ...

**Organic Chemistry**

A lower yield of phosphonium salt is obtained in refluxing benzene than in xylene. Look up the boiling points for these solvents, and explain why the difference in boiling points might influence the yield. I'm not sure how to answer this question. I see that benzene has a ...

**Chemistry**

How much ethanol C2H50H in liters d=0.789g/ml must be dissolved in water to produce 190.5 of 1.65M c2H50H ? Molarity problem. Who helps me to solve it for me. My calculation 0.789g/ml x 1000ml/46.06 = 17.12M 17.12M = 190.5 x 1.65 17.12M = 314.325 x= 314.325/17.12 x = 18.36ML I...

**calc**

For each function below find the best linear approximation (linearization) at the given value. f(x) = x^-1 at x = 2 y = 1/2 f ' (x) = -1x^-2 at x = 2 : -1/4 y - 1/2 = -1/4 (x-2) y - 1/2 = -1/4x + 1/2 y = -1/4x + 1 Use the appropriate linearization above to find approximate ...

**Physics**

Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 – 4 complete sentences. Would I see all the colors except for red? Or would I just see the color green? I am not sure

**Writing**

Please Help me !! Sentence 9: They emphasized the importance of good maternal and child health care, including the administering of vaccines? 1- replace They with it 2- change emphasized to emphasize 3- change the spelling of importance to importants 4- insert a comma after ...

**All core classes.**

What were some 80's icons? I have a project that's on the most important political and environmental events in the U.S during the 80's. I want to make some titles, for each subject (i had an assignment for almost each class, excluding my elective and p.e), and I'm not sure ...

**english**

Many notable poets often lived in the New England states. In the above sentence is New England an adjective? Im sure that many and notable are but I am unsure if New England is. Also i need to know the subject modifiers which i think are many and notable which I think modifys ...

**English**

1. Let me call roll to make sure you're all here. 2. Let's decide the turns first. Who would like to go first? 3. Could you please fetch it from the staff room? 4. Could you please fetch it from the teachers' room? 5. Could you please fetch it from the teacher's room...

**Chem HW**

COVALENT COMPOUNDS WORKSHEET 1. Find the Bond Lengths in the following compounds: report in pm a) SiF4 __________________________________________________ b) N2S3 : N-N________________ N-S _______________________________ c) HBr __________________________________________________...

**english**

In each of the following sentences, insert correct capitalization and marks of punctuation whenever they are needed. Are these sentences correct. 1. On a recent blustery February afternoon, students were tearing down a sagging porch. 2. They are part of a program, trying to ...

**english**

Can someone correct this and tell me if its a good answer? Question? Discuss how you would approach creating a negative message for a superior(such as a manager at work or instructor)versus creating a message for a collegue, subordinate, or fellow student? My answer: A ...

**Statistics/Probability**

3. On a given evening, two roommates, roommate A and roommate B, are arguing over who should control the television remote. Roommate A suggests a game of rock-paper-scissors to settle the dispute. It's the first time that the roommates have played each other in rock-paper-...

**physics 11**

if you have the formula W=Fd, where W=work, F=force, and d=displacement, how do you find W if you don't have F, but you have a mass and displacement?

**Health care admin.**

How can health care providers work together within the continuum of care?

**Math**

susan spends 2 1/4 hours taking inventory and 1 1/2 hours restocking how many hours does susan work

**math**

solve algebraically and check y=8x+3 y=-4x-21 8x+3=-4x-21 +4x +4x 12x+3=-21 -3 -3 12x=-24 x=-2 y=8x+3 y=8(-2)+3 y=-16+3 y=-13 (-2,-13) check y=8x+3 -13=8(-2)+3 -13=-16+3 -13=-13 y=-4x-21 -13=-4(-2)-21 -13=8-21 so -13=-13 these check, so did I do this correctly? Thanks for ...

**calculus**

T^(1/3)=e^(r/10)m^(3/2) If the mass and radius are given as m= 2 mg and r= 5mm, and the rates of change of the temperature and radius are given as 3 deg/sec and 1 mm/sec, what is the rate of change of mass (m)?

**physics**

A point charge Q= 4.60 uC is held fixed at the origin. A second point charge q=1.20 uC with mass of 2.80 * 10^-4 is placed on the x-axis 0.250 m away from the origin. (b) The second point charge is released from rest. What is its speed withn its distance from the origin is (i...

**physics**

An unknown liquid fills a square container of sides 10 m. What is the density of a material if the pressure 5 m below the surface is 1.6 atm? Assume g=10 m/s^2 and the pressure at the surface of the liquid is 1 atm. Also assume that 1 atm = 10^5 Pa. (Hint: make sure to use the...

**calculus**

LEt f and g be continous functions with the following properties i. g(x) = A-f(x) where A is a constant ii. for the integral of 1 to 2 f(x)dx= the integral of 2 to 3 of g(x)dx iii. for the integral from 2 to 3 f(x)dx = -3A a find the integral from 1 to 3 of f(x)dx in terms of ...

**calculus**

LEt f and g be continous functions with the following properties i. g(x) = A-f(x) where A is a constant ii. for the integral of 1 to 2 f(x)dx= the integral of 2 to 3 of g(x)dx iii. for the integral from 2 to 3 f(x)dx = -3A a find the integral from 1 to 3 of f(x)dx in terms of ...

**Calculus**

The rate of growth of the profit (in millions of dollars) from a new technology is approximated by P'(x)=xe^(-x^2) Where x represents time measured in years. The total profit in the thrid year that the new technology is in operation is $10,000. A. Find the total profit ...

**Calculus**

Application of Derivatives and Integrals: A sign 3 feet high is placed on a wall with its base 2 feet above the eye level of a woman attempting to read it. How far from the wall should she stand to get the best view of the sign, that is, so that the angle subtended at the ...

**Calculus**

1. Find the are between the curves y=e^x and y=4-x^2 graphically. a.) set up the integral b.) include bounds rounded to three decimal places c.) use integral function on calculator 2. Find the area of the "triangular" region bounded by y=4-x on the left, y=sqrt(x-2) on the ...

**Derivative Calculus**

I just need my answers checked. 1) Find the derivative. f(x)=3x^5/4 - 8/9x^9/8 + x^2 - 9x + 1 Answer: f’(x)= 15/4x^1/4 - x ^1/8 + 2x -9 2) Let f(x)= 7x^3 - 9x. Find f’(5) Answer: f’(x)=21x^2-9 f’(5)=516 3) Find the given limit by evaluating the derivative. lim h⇒...

**calculus**

the cross section of a 5-ft long trough is an isosceles trapezoid with a 2 foot lower base, a 3-foot upper base, and an altitude of 2 feet. water is running into the trough at a rate of 1 cubic foot per minute. how fast is the water level rising when the water is 1 foot deep?

**Calculus**

Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and 69.3 inches tall? b) ...

**Calculus**

Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and 69.3 inches tall? b) ...

**calculus**

A light is attached to the wall of a building 64 feet above the ground. A ball is dropped from the same height, but 20 feet away from the side of the building. The height y of the ball at time t is given by y(t) = 64 − 16t 2 . How fast is the shadow of the ball moving ...

**Calculus**

A balloon is rising at a constant speed of 5 ft/sec. A boy is cycling along a straight road at a constant speed of 15 ft/sec. When he passes under the balloon, it is 5 feet above him. Determine how fast the distance between the boy and the balloon is increasing 3 seconds after...

**Calculus 2**

Use the Comparison Test to determine whether the series is convergent or divergent. On top of the summation sign (∑) is infinity. Under the summation sign is n=1, and right next to it (to the right of ∑ sign) is cos^2n/n^2. How would I compare them and come to the ...

**Calculus**

How do you prove area of a circle? Integrate an incremental area dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians. Area= INT INT dTheta rdr dTheta Area= 2PI (1/2 R^2)= PI R^2

**Calculus**

Write a formuls for the general term(nth term) of the arithmetic sequence. Do not use a recursion formula. Then use the formula for A to the n to find the indicated term of the sequence find a11: 12, 10, 8,...

**Calculus**

Find the derivative of cos(sqrt(e^(x^3)cos(x)) I got -sin(sqrt(e^(x^3)cos(x))*((sqrt(e^(x^3)cos(x)) Do I just leave the e^(x^3)cosx alone since it's "e" or do I still have the find the derivative for it?

**Calculus - please help!**

Suppose that 0 < c < ¥ð/2. For what value of c is the area of the region enclosed by the curves y = cos x, y = cos(x - c), and x = 0 equal to the area of the region enclosed by the curves y = cos(x - c), x = ¥ð, and y = 0? i have no idea how to solve this question.

**Calculus**

Use linear approximation, i.e. the tangent line, to approximate (1/0.504) as follows: Find the equation of the tangent line to f(x)=1/x at a "nice" point near 0.504. Then use this to approximate (1/0.504).

**calculus**

Consider the interval I=[6,7.6]. Break I into four subintervals of length 0.4, namely the four subintervals [6,6.4],[6.4,6.8],[6.8,7.2],[7.2,7.6]. Suppose that f(6)=19, f′(6)=0, f′(6.4)=−0.5, f′(6.8)=−0.1, and f′(7.2)=−0.1. What is the...

**calculus**

i am on "rolles and the mean value theorem" and was just wondering, when i am doing rolles, do i really need to find the exact value of x where f'(c) = 0? for example: f(x) = (x+4)^2 (x-3) on [-4,3] i get to: 3x^2+10x-8=7 then i don't know if i then need to find the exact ...

**Calculus**

The rate of change in the volume of a tank is known to be dV/dt=0.6t*cos(0.08t^2 -1), where V(t) is in gallons per minute and 0<=t<=10 (0 is less than or equal to t which is less than or equal to 10). If the tank has a volume of 14 gallons initially, what is its volume ...

**Calculus**

Find an equation of the tangent line to the graph of the function f through the point (x0, y0) not on the graph. To find the point of tangency (x, y) on the graph of f, solve the following equation of f '(x). f '(x) = y0 − y/x0 − x f(x) = √x (x0, y0) = (-16, ...

**Calculus**

The radius of a circle is increasing. At a certain instant, the rate of increase in the area of the circle is numerically equal to twice the rate of increase in its circumference. What is the radius of the circle at that instant? A. 1/2 B. 1 C. Sqrt 2 D. 2 E. 4

**Math**

Which expression is equivalent to (-2)(a+6)? -2a+6 2a+12*** -2a-12 -2a+12 To which subsets of real numbers does the number -22 belong? Choose all that apply. Whole numbers*** rational numbers integers*** irrational numbers "6 times the difference of b and p?" 6b-p 6(b-p)*** 6-...

**Statistics**

What is the difference between normal distribution and approximate normally. Correct me if im wrong but I think the parameters of Normal is X~Normal (mu, standard deviation) but then approx. normal is X~Normal (mu, variation) im just really confused when you use each and such.

**Calculus**

f(x)= (-5x^3 + 3x^2 + 3x -5)/(-8x^2 +2x + 7) Find the equation of the non-vertical asymptote. y = ? Does f(x) intersect its non-vertical asymptote? (yes or no) If yes, what is the smallest value of x at which f(x) intersects its non-vertical asymptote?

**calculus**

The temperature of a hard boiled egg varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A, where T is the temperature of the egg, A is the room temperature, and k is a positive constant. If the egg cools from 100°C to 90°C in 1 ...

**Economics; The Cost of Production**

Please check my answers if they are correct. Thank you. THE QUESTION: Mark runs a business that sells guitars. In an average year, he receives $900 000 from sales of guitars. Of the sales revenue, he must pay the manufacturer a wholesale cost of $600 000; he also pays wages ...

**math**

The table shows the depth (d metres) of water in a harbour at certain times (t hours) after midnight on a particular day. time t (hours) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 and the in the next column corresponding to the figures above is depth d (m) 3.0 3.3 4.2 5.6 7.2 8.2 9.0 8.9...

**history**

which belief was held by most Progressives? a. the government should own American industries b. Houseing and health care should remain private c. the government should protect agricultural interests d. the government should intervene in unfair business practices i'm not sure ...

**Business Communication**

Before writing a recommendation report to the CEO, Dee and Carlos distribute a survey to everyone in their company to determine which new benefits employees are most interested in. What part of the writing process does this activity represent? (a) Planning (b) Gathering (c) ...

**Logarithms**

1. Find the amount of time required for an investment to double at a rate of 12.3% if the interest is compounded continuously. MY ANSWER: 5.635 yrs 2. Solve e^(0.2x) < 21.2 by using natural logarithms. MY ANSWER: X<15.270 3. Convert log(base 5) 47 to a natural logarithm ...

**How to study lecture notes**

I know this seems like a silly question, but this is my first time taking a big lecture class (200-500 students). I take really detailed notes and our professor provides us with lecture outlines but I don't really know how to go about studying these outlines. Just reading over...

**Chemistry**

I am reading through material for a recrystallization experiment, and I had a few things I wasn't sure about; - Why once filtered, should the recrystallization solution be allowed to cool slowly, undisturbed, rather than quickly? and -What makes a good solvent, i.e. what are ...

**Critical Reading- Ms.Sue**

Hello Again, I came across another questions I have... One way a critical reader can synthesize ideas on related issues from varies sources is to A.) analyze the sources for objectivity? B.) select the most popular writers in these sources? Or C.) decide if the issues are part...

**strayer**

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department. You are not sure if ...

**epidemiology**

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department. You are not sure if ...

**Statistics**

I am not sure how to even get started on this question could someone help please. A college advisor wants to estimate the mean annual income of all college students who graduated last year. It is believed that the incomes follow a normal distribution with population standard ...

**Integrating Factors**

I've been working on this hw problem for a while now, but I'm stuck in the integration process. I'm pretty sure I made an error, cause I can't seem to be able to integrate the right side of the equation. Q: (1/(x^(2)+1))y' + xy = 3 using the equation d/dx(ry)=f(x)r(x) I found ...

**Physics**

What is the ratio of the wight of a man when he is in a tunnel 1000 km below the surface of the Earth to his weight at the surface? ...I'm not sure how to proceed, not because I don't know how to do it, but because I have no idea how to come up with a(g) 1000 km inside the ...

**Physics**

A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction between...

**Math**

Mr. Sockem wears only black or navy blue socks, which are exactly alike except for their color. He has six pairs of each color, and he keeps them all mixed up in a drawer. One night, while the room was in complete darkness, he wanted to find a pair of matching socks. How many ...

**math**

2x + 3y = 78 How do i solve for x and y? 2x=78 78/2=39 so x=39 3y=78 78/3=26 so y=26 Can't be, because 2(39)+ 3(26) does not equl 78 You need TWO equations when you have TWO variables, such as x and y. It can't be done with one equation. BUT, you say, what about this post ...

**Question**

What,if anything,is wrong with this sentence? An appeals court ordered the money returned,however,the IRS didn't comply. A. PROPERLY CONSTRUCTED SENTENCE B. LACKS PARALLEL PARTS C. DANGLER D. COMMA SPLICE I THINK THE CORRECT ANSWER IS: (B)LACKS PARALLEL PARTS AM I CORRECT? No...

**Maths**

How do I work out the square root of a number? it's simple. - you can use your calculator or use perfect squares to solve one. perfect squares: 4 9 16 25 36 49 etc. Need anything else just ask.

**Algebra**

Is there any prime number whose root is an integer? I meant to say Square Root Nevermind I figured it out. Good work. If a prime number by definition has no factors, ...

**math**

2/3 over 10 equals 1.8/r solve for r. (2/3)/10 = 1.8r. First, invert and multiply the denominator; i.e.,10. (2/3)*(1/10) = 1.8/r 2/30 = 1.8/r Now cross multiply. 2r = 30*1.8 2r = 54 Now divide both sides by 2 2r/2 = 54/2 r = 27 check my thinking. check my work.

**math**

alexander had some nickles in his bank. he added 3 dimes to the bank and then he had 85 cents.how many nickles did he have left? write an equation and work backward to solve.

**physics**

An electron is released from a distance of 2 cm from a proton. How fast will the electron be going when it is .5 cm from the proton? It says to use the work energy thereom, but I don't understand how to use it. any help would be greatly appreciated!

**english**

diagram the suject pronoun, action verb or verb phrase, and direct ovject (pronoun) in the sentence. 1. pastors do god's work. 2. god has created all things.

**Art**

Please can someone name an artist who bases their art work theme on 'good and bad' or 'good and evil'. And an artist who uses colour to show emotions? Thankyou!

**culteral Diversity**

In the agrarian subsistance technology, which preceded the industrial technology revolution, work was a. Capital intensive b. Machine intensive c. Labor intensive d. Management intensive e. All the above

**Physics 1**

A 0.620 kg basketball is dropped out of a window that is 6.40 m above the ground. The ball is caught by a person whose hands are 1.61 m above the ground. How much work is done on the ball by its weight?

**physics**

A 0.620 kg basketball is dropped out of a window that is 6.40 m above the ground. The ball is caught by a person whose hands are 1.61 m above the ground. How much work is done on the ball by its weight?

**Algebra**

What is the profit of 30 flight excursions if the set up fee is $40.00 per person, $800.00 rental fee for the hanger? I need this answer and I need it in a algebra equation, to show the work.

**physics**

A 180 kg block is pulled at a constant speed of 8.3 m/s across a horizontal floor by an applied force of 135 N directed 15° above the horizontal. What is the rate at which the force does work on the block?

**Physics**

A tennis player hits a 58.0g tennis ball so that it goes straight up and reaches a maximum height of 6.17m. How much work does gravity do on the ball on the way up? On the way down?

**Trigonometry**

I need help with the inverse of si, cos, & tan. So far on one problem I've gotten sinX = 29/14 where do I go from here? I know you have to use cos^-1, but how? Can anyone work this one problem out for me to see how to do it? THANKS!

**college algebra**

Solve: sq root of (x+1) minus 3 = sq root of (x+4) when I solve it I get zero, but when I plug it back in only one answer works. do both have to work for it to have a solution?

**Khan**

A person lifts a 4.3 kg cement block a vertical distance of 1.3 m and then carries the block horizontally a distance of 5.3 m. The acceleration of gravity is 9.81 m/s 2 . a) Determine the work done by the person in the process. Answer in units of J

**physics**

The drawing shows a boat being pulled by two locomotives through a canal of length 2.50 km. The tension in each cable is 5.00 103 N, and è = 19.0°. What is the net work done on the boat by the two locomotives?

**physics**

you pull a sled along a horizontal surface by applying a force of 620 N at an angle of 42.0 degrees aboce the horizontal. How much work is doen to pull the sled 160m.

**physics**

A 0.579 kg basketball is dropped out of a window that is 6.22 m above the ground. The ball is caught by a person whose hands are 1.31 m above the ground. How much work is done on the ball by its weight?

**physics**

A 0.579 kg basketball is dropped out of a window that is 6.22 m above the ground. The ball is caught by a person whose hands are 1.31 m above the ground. How much work is done on the ball by its weight?

**physics**

A 16.3 kg block is dragged over a rough, horizontal surface by a constant force of 157 N acting at an angle of 35 degree above the horizontal. Find the work done by the 157 N force.

**physics**

Spider silk is a remarkable elastic material. A particular strand has spring constant 70 mM/m, and it stretches 9.5 cm when a fly hits it. How much work did the fly's impact do on the silk strand?

**dressmaking**

A houndstooth(black and white plaid) jacket would work well with which of the following bodylines? A) Straight B)Soft-straight C)Soft-curved D)curved Im thinking it could be A or B.Need help for this question

**Physics**

You push your couch a distance of 3.6 m across the living room floor with a horizontal force of 198.0 N. The force of friction is 151.0 N. What is the work done by you, by the friction force, by gravity, and by the net force?

**Writing**

I am doing a journal review paper for Psychology. What are the implications of this work (i.e. what light does it shed on the particular topic related to psychology)? I do not understand the question. What is it asking me to do? Can someone explain the question so I am can ...

**PHYSICS**

15.0 moles of an ideal gas, at an initial pressure of 3.50 x105 N/m2 and an initial volume of 1.200 m3, undergo a small isothermal expansion to a volume of 1.220 m3. Find the work done by the gas.

**MATH**

if the minimum cost is $608.50 how many barrels are extracted in order to meet the minimum cost. C=9x2-144x+608.50 this is a quadratic relation that 2 is a exponet. please show your work

**home work**

A framed picture has length 50 cm and width 40 cm . The picture itself has area 1344 cm^2. How far is it from the edge of the picture to the edge of the frame if thid didtance is uniform around the picture ?