Calculus (Answer Check)
88,467 results, page 29

CALCULUS. Check my answers, please! :)
The domain of f(x)=(1)/(sqrt(x^26x7)) is (1, 7) [1, 7] x > 1 or x < 7 ***{x < 1}U{x > 7} (∞, 1]U[7, ∞) 2. In which of the following is y a function of x? I. y^2=9x^2 II. y=x III. y=(sqrt(x^2))^3 I only II only III only ***I and III only I, II ... 
other Quadratic equations
The problem is 7x^3x+1=x^3+3x^2+x. Find all real answers. I came upwith two answers 3x^2=1 and 2x=1/2. The first answer just does not look right. I must be forgeting something! You can check them by putting in x=1/4 (the second answer), and then x=+ sqrt(1/3) These are three... 
grammar
please check and let me know if this is correct. What the teacher is asking for for the sentence be changed to is to the left. 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 ... 
PreCalculus
HelpI'm confused. I am trying to convert the linear equation 4x+3y10=0 to polar form. Thus far, I have 2= r cos(theta ?????). I understand that I must get the arctan of 3/4 but I get the answer of 36.9. Is this correct and if notwhat am I doing wrong. Thanks 
Calculus
Find the amount of an annuity if $210/month is paid into it for a period of 20 yr, earning interest at the rate of 8%/year compounded continuously. (Round your answer to two decimal places.) 
Calculus
Find the amount of an annuity if $210/month is paid into it for a period of 20 yr, earning interest at the rate of 8%/year compounded continuously. (Round your answer to two decimal places.) $ 
Calculus
Find the limit as x approaches infinity. sqrt(81x^2 + x)− 9x. I've worked this two different ways and have gotten 0 and 1/9, neither of which is the right answer according to the homework system?? 
calculus
Use the Left and Right Riemann Sums with 100 rectangle to estimate the (signed) area under the curve of y=−2x+1 on the interval [0,50]. Write your answer using the sigma notation. 
Calculus
Find the number a such that the line x = a divides the region bounded by the curves x = y^2 − 1 and the yaxis into 2 regions with equal area. Give your answer correct to 3 decimal places. 
pre calculus math
$2500 is invested in an account that pays 12% interest, compounded continuously. Find the time required for the amount to triple. Round your answer to the nearest tenth of a year. 
algebra
please review the questions and table and check my answers. tank you tutors. table planets' orbital velocity planet orbital velocity (mi/s) mercury 29.74 venus 21.76 earth 18.5 mars 14.99 jupiter 8.12 saturn 6.02 uranus 4.23 solve. show your work. express the answer in ... 
Math
Jake can carry 6 1/4 pounds of wood in from the barn. His father can carry 1 5/7 times as much as Jake. How many pounds can Jake's father carry? Answer: 1 3/28 Can you please double check the above answer. I don't know if it is right or wrong. 2. A glass can hold 3 1/3 cups of... 
Physics Help
State the number of significant figures. 1) 809 Answer : 3 2) 0.0060 Answer : 5? 3) 0.00000095 Answer : 9? 4) 5.60 Answer : 3 5) 5.743 Answer : 4 6) 0.010 Answer : 4? 
Math
Could someone please check my math questions? My answers are under the questions... 32. Six times a number less than ten is eight. Find the number. a. 1/3 b. 3 c. 1/3 d. 3 My Answer ~ b 33. Jane works at the public library after school. She makes $7.00 per hour. She cannot ... 
Ethics
please check my answer thanks :) Answer True of False to the following... 1. All pt authorzations to relase medical info are sufficient authorize relase I said True 2. All jurisdictions require both a subpoeana ansd a relase from the pt to relase medical records I said false 
French
I would like to double check my work: A. Invert the following: Estce qu’elle veut boire un apéritif? Answer: Bois qu'elle un apéritif? B. Make the following statement negative: Nous allons au cinéma et au théâtre. Answer: Nous n'allons pas ni cinéma ni au théâtre. 
English
Please check my answer tahnks :) Choose the plural noun that is spelled correctly. Phenomenons pianoes Fatherinlaws Editors in cheif I picked Phenomenons 
Enghish
Please check my answer thanks :) In the sentence "Although the book was more than 50 years old, it still contained helpful information", the word although is what. I said it's adjective 
dog behavior
please check my answer thanks True or False Edward C. Thorndike studies the effects on dogs behaviors using a reward system I said True 
Health/ Basic Clinical Procedures
please check my answer thanks For which of the following procedures should you wear gloves ? A veinipuncture B CT scan C EKG D hand washing I picked A 
Health/ Basic Clinical Procedures
please check my answer thanks True or False Assessing a patient through the use of a stethoscope is called ausculation I said True 
Health/ Basic Clinical Procedures
please check my answer thanks true or false Taking your temp digital it does not come in contact with mucous membranes I said true 
dog behavior
please check my answer thanks so much for your help. True of False generalization means The tendecy to respond to stimuli resmbling the conditioned stmulus I said True 
Algebra
Could someone please help me figure out this question. If I paid $76.08 for something that was 40% off, what was the regular price? I got $127.98 but when I check my answer I am off by 2 cents. What am I doing wrong? 
Math(Please check)
g(x) = (3/2)^x+2 I need to find the intercepts. My teacher told me to press trace on my graphing calculator to find them. I got x = 0 and y=3 everything else is decimals so is my answer just (0,3)? 
math
A caterer offers a choice of five desserts from a list of eight for the dessert bar at the prom. How many different groups of desserts could be served? please check my answer = 120 
math
If a McBurger employee is expected to work four of the seven days in a week, how many different weekly schedules are possible for the employee? Please check my answer = 840 
Math 115
Please check answers 461mm=_____m answer 461/1000=0.461m Second one 20lb= 320oz 20lbs*16ounces= 320oz 
Science(egg in vinegar) PLease check my answer
what biological model does the egg represent? stomach it shows what happens to protein iif you put it into an acid. 
MATH ✿╣Check╠✿
what is the surface area of a sphere with a radius of 5 meters rounded to the nearest square meter? MY ANSWER: 314m^2 (is it correct?) 
please check my answer!!!
through their study on earth, geographers learn how earth and its people affect ? human health the solar system *** each other political systems 
Check Answer!!
You deposit $4,300 in an account earning 3.5% interest compounded semiannually. How much will you have in the account after 9 years? 4300(1+.035/2)^(2x9) ~~ 5876.08 
science: plz help Mrs. Sue
Which of the following is a behavioral adaptation of a spider? a. poisonus venom b. web spinning c. eight legs d. body color My answer is a. plz check. 
SS7R  HW Check
I'm going to repost my homework questions because now I'm all over the place and confusing you. Please delete my other posts. 1. The ___________ states the responsibilities of the government and protects the rights of states and citisens answer  constitution. 2. to keep ... 
Pre Calculus HELP!?
The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of hours of daylight t days into the year: f(t)= 10+2.8sin(2pi/365)*(t1.35). How many hours of daylight are there on the 100th day of the year? Round the ... 
physics (check my answers)
When the nuclear fuel in the sun is gone, the sun will collapse to a a. black hole b. white dwarf c. supernova d. neutron star My answer: I think its a black hole. If the mass of the Earth were suddenly doubled while the radius was unchanged, your weight would be? My answer: ... 
calculus
Annual sales of bottled water in the country in the period 19932003 could be approximated by the function below, where t is time in years since 1990. Were sales of bottled water accelerating or decelerating in 2000? How fast? R(t) = 10 t**2 + 100 t + 2400 text( million ... 
Physics
I thought I did the problem right, but I don't think I came out with the right answer! Please someone check to see if I got this problem right. Calculate the force of gravity between Earth (mass=6.0*10^24 kg) and the moon (mass=7.4*10^22 kg). The average Earthmoon distance is... 
Please check my calculus
A conical tank has a height that is always 3 times its radius. If water is leaving the tank at the rate of 50 cubic feet per minute, how fast if the water level falling in feet per minute when the water is 3 feet high? Volume of a cone is V=1/3(pi)r^2h A. 1.000 B. 5.305 C. 15.... 
Precalculus
Calculate the solution set. x^2+y^2+8x=15 9x^2+25y^2=225 My work: I did elimination...multiplied 25 to the top equation and got..... 16x^2200x600...I then used quadratic formula ... And got 7.5 and 5..... Is 7.5 an EXTRANEOUS SOLUTION because when I plugged 7.5 in for... 
Math
1. Rishi ram obtained an installment loan for $3,000.00. He agreed to repay the loan in 6 monthly payments. His monthly payments is $516.50. What is the APR? MY ANSWER=0.33% 2. Tim Newman took out a simple interest loan of $1500 at a 10 percent interest for 12 months. After 4 ... 
PreAlgebra Checkk
1. Convert the rate using dimensional analysis. 30 miles/hour = _______ feet/second a. 0 b. 44 c. 43 d. 2 answer: b 2. Convert the rate using dimensional analysis. 16 feet/second = _____ yards/minute a. 240 b. 120 c. 10 d. 320 answer: b Can someone check my answers please? 
Math
There are 72 boys and 90 girls on a math team. For the next competition, Mr Johnson would like to arrange all the students in equal rows with only girls and only boys in each row. What is the greatest number of students that can be in each row? Answer: 72 + 90=162 162/2=86 Can... 
math
A woman buys a $ 78 necklace at a jewelry store. She gives the jeweler a check for $ 100. Because he does not have the $ 22 change, he goes to another merchant next door. There he exchanges the woman's check for $ 100 in cash. He returns and Gives the woman the necklace and ... 
Algebra( check my answers)
1. Juan deposited $200 in a savings account earning 3% interest over 2 years. What was the total amount of interest earned after 2 years? $12 $24 $120 ( my answer) $240 2. Mary borrowed $11,000 at 5% interest for 4 years. What was the total interest? $22 $220 $2200 (my answer... 
math
I am a little confused on the first question of this problem could someone please check my answers and please explain why and what I need to do to get correct answer thank you Calculate the mean, and write this as a mixed fraction. 12,9,4,6,8,12,13,14,11,5,12,2,9,13 answer I ... 
calculus
Hi i need help in this. Some of the parts i got the answer but some i don't. please help! A ship uses $(7v^2) of fuel per hour when travelling at a constant speed of v km/h. Other expenses in operating the ship (i.e. crew and equipment) amount to $345 per hour. The ship makes ... 
Physical Science
Hi! Thanks for checking my question out! ____ 1. Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? (1 point) a) CH4 + O > H2O + CO2 b) CH4 + 4O > 2H2O + CO2 c) CH4 + O2 > H2O + ... 
Math
if a number is not a rational number, then it is______. A. an integer B.an irrational C.whole number D.a radical My best answer is B. Can you check please @Ms.Sue 
precalculus
can you check my work? Find a polar equation of an ellipse with its focus at the pole an eccentricity of e=1/4 and directrix at y=4. answer: √(x^2 + y^2) / (y  4) = 1/4 4√(x^2 + y^2) = y  4 4r = r sin θ  4 (sin θ  4) r = 4 r = 4/(sin θ  4) 
Science
I need to check my answers!! Which of these is not in the family a. sound b. light c. infrared radiation (answer) d. radio waves When an electric charge is shaken to and fro in quick succession, the vibrating charge emits a. infrasonic sound b. Ultrasonic sound c. an ... 
Science
I need to check my answers!! Which of these is not in the family a. sound b. light c. infrared radiation (answer) d. radio waves When an electric charge is shaken to and fro in quick succession, the vibrating charge emits a. infrasonic sound b. Ultrasonic sound c. an ... 
Calculus I
Hello! I am taking Calculus I and am in Sec. 4.3 of Stewart's 7th Edition. I ran across a problem that I don't understand the mechanics of, could someone show me? Thanks a bunch! For what values of the numbers a and b does the function f(x)= axe^{b(x^2)} have the maximum value... 
History
Can someone please check my work? 18) Many wealthy American industrialists of the late 19th century used the theory of Social Darwinism to: a. Support the labor union movement b. Justify monopolistic actions c. Promote legislation establishing a minimum wage d. Encourage ... 
Math 116 algebra please check
Multiply 1/7×(3/7)=3/49 Please check 
To Brady, please check
Please check my answers down below. 
Calculus
This is a calculus homework question but in reality the problem here is understanding the algebra. Find the Critical Numbers of f(x) = x^(3/5)(4x) The product rule gives x^(3/5) + (123x)/(5x^(2/5) My booklet explains that simplifying this gives you 128x / (5x^(2/5). How ... 
French
Could you check these please thanks Part 1 Directions: Exprimez d'une autre façon. 1. composer le numéro Answer: faire le numéro 2. donner un coup de fil Answer: faire un appel 3. introduire (une télécarte dans la fente) Answer: mettre la télécarte dans la fente 4. je ... 
Calculus
Check my work? The equations given were R(x)=x^2+400x and C(x)=x^2+40x+100. We were asked to find the maximum profit and minimum average cost. (I'm having trouble remembering how to find a minimum and maximum, so please help with that, if you can!) For Max Profit, I got $16,... 
calculus
hi I posted this question earlier: what is the median waiting time for f(x)=((1/8)e^(x/8))? I said the answer was 5.55 is this correct? thank you! and somebody helped me find the mean, but i was wondering if this was the right median. thanks 
Calculus/Trigonometry
A box of fixed volume V has a square base with length x. Write a formula for the height, h, of the box in terms of x and V. Sketch a graph of h versus x. Is the answer h=V/x^2 
calculus I
find a and b so that f(x)=x^2+ax+b has a local min at (6,5) i found the derivative: f'=2x+a then i found a 0=2x+a 0=2(6)+a 0=12+a a=12 but i can't seem to get the correct value for b. i plugged 5 into the original function, but my book says the answer is b=31. 
calculus
Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 4. Use the left hand rule with n = 50. Give your answer to four decimal places. 
Calculus
Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 4. Use the left hand rule with n = 50. Give your answer to four decimal places. 
Calculus
Find the derivative of y with respect to x: y=(1+cos²x)^6 y'=6(1+cos²x)^5 How do you derive inside the brackets? The answer says sin2x, but wouldn't it be 2sinx, using the chain rule. 
calculus
limit as x approaches 2 where f(x)=5x5 Find a δ such that  f (x)  5  < 0.01 if  x  2  < δ. (Give your answer correct to 4 decimal places.) Need helpp!!! I have no idea how to do it. and nobody that can help!! 
PreCalculus
I need to write a polynomial of the smallest degree with roots 5 and 6 and the answer can't have parentheses. Can someone point me in the right direction. I have several of these to do. 
calculus
Estimate the area of the region under the curve y = ln(x) for 1 ≤ x ≤ 5. Use the lefthand rule with n = 50. (Round your answer to four decimal places.) 
calculus
Find the arc length of the graph of the function over the indicated interval. (Round your answer to three decimal places.) y = ln (sin(x)) ,[π/4,3π/4] 
calculus
For x>0 find and simplify the derivative of f(x)= arctan(x) + arctan(1/x). I've done the problem a few times and I keep getting (1)/(1+(x)^2)+(1)/(1+(1/(1/x)^2))(x)^2 but something about the answer is wrong and I cannot figure out what. 
calculus
Determine the value(s) of x where the function will have an instantaneous rate of change of 14. (Enter your answers as a commaseparated list. If an answer does not exist, enter DNE.) f(x) = x3 + 33 x2 + 14 x + 39 
A/P Calculus
A cyclist is riding on a path whose elevation is modeled by the function F(X)=0.2x where x and f(x) arte measured in miles. Find the rate of change of elevation when x=5. ? Supposed answer: ?? 1 
Calculus Help Please Urgent!!!
Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. integral from o to pi/2 (2cos^3(x))dx , n = 4 M4 = ?????? Thanks!!! 
Calculus
An airplane is heading due east with an airspeed of 220km/h when it encounters a wind from the south at 76km/h. What is the direction of the resultant velocity of the airplane The answer is E19.06°N but I don't know how 
Calculus
The function defined below satisfies Rolle's Theorem on the given interval. Find the value of c in the interval (3, 2) where f'(c)=0. f(x) = x + 6x1 , [3, 2] Round your answer to two decimal places. 
calculus
the region bounded by the graph f(x)=x(2x) and the x axis is revolved about the y axis. Find the volume of the solid. I did the integral using the shell method, but the answer wasn't correct. 
Calculus
What kind of discontinuity is this: F(x)= (2x^2  5x 3)/(x3) if x does not equal 3 6 if x=3 It is a pieces use function. I thought it was removable but my answer key says it is a jump discontinuity. This is from an exam review and I want to get it right. 
Calculus
True/false: x^23 is concave up on the interval (1,1) The second derivative of x^23 is just 2. How do I determine concavity of a function when I can't set it equal to 0? And then how do I answer this question when it's asking for a specific interval? 
Calculus
Consider the function f(x) = {0, x = 0 and 1  x, 0 <= x <= 1}. Which of the following statements is false? a. f is differentiable on (0, 1). b. f(0) = f(1) c. f is continuous on [0,1] d. The derivative of f is never equal to zero on the interval (0,1). B and D are true... 
Calculus
(a) Compute the area of the bounded region enclosed by the curve y = e^x, the line y = 12, and the yaxis. (b) How does this area compare with the value of the integral ∫112(ln x dx)? Explain your answer. (A picture may be helpful.) 
Calculus
(a) Compute the area of the bounded region enclosed by the curve y = e^x, the line y = 12, and the yaxis. (b) How does this area compare with the value of the integral ∫ from 1 to 12 of (ln x dx)? Explain your answer. (A picture may be helpful.) 
Algebra
I posted this yesterday but no one told me if my answers were correct. Can someone please check my answers. 1. Solve. –7x + 1 + 8x = x + 1 A) Identity B) No solution C) 1 D) 0 My answer: A) Identity 2.The length of one of the equal legs of an isosceles triangle is 8 cm less ... 
Math156check my answer please
a tennis magazine averages 150 pages per issue, there are 7 adds for every 3 pages. how many ads would you expect in a typical issue ? 150 divided by three =50 50 x 7 ads =350 my answer is 350 ads would be in an issue Is this correct ? 
MathAlgebra 2
The surface area of a golf ball is 8.92 in ^2. The surface area of a softball is 53.78 in ^2. Find the ratio of the volumes of a golf ball to a softball. Surface Area = 4π r^2 and Volume = 4/3π r^3 I'm not sure if I did this problem right, but I think the answer is 0... 
Micro Economics
Assume that the market for annual physical checkups is in equilibrium, and not everyone gets an annual physical checkup. What is the effect on price and quantity if a government regulation fixes prices at the current level and requires everyone to get an annual physical ... 
CHEMISTRY
I am having trouble understanding how to come up with the products for single replacement reactions. Can any one check my work and tell me what i am doing, and also point out if i am missing any rules. 1. KI + Cl2 > 2. Fe + HCl > 3. Zn + HNO3 > For number 1 i... 
PreCalculus
f(x) = 7x^3 + 8x^2  3x + 8 Find f(7) using synthetic division, and list the numbers in the bottom row of the division. My answer: The numbers in the bottom row are 7, 58, 403, and 2829. The answer is 7x^2 + 58x + 403 + 2829/x  7. 
Math
1. The movie theater has 21 cups of popcorn. Each container they sell holds 3/4 cup of popcorn. How many containers can the theater sell before they need to get more popcorn? My answer is 28 containers.. 2. A sixth of the vegetable plants in a garden are tomatoes. If there are... 
chemistry help asap
Please check these thanks. 1. In a titration, 33.21 mL 0.3020M rubidium hydroxide solution is required to exactly neutralize 20.00 mL hydrofluroic acid solution. What is the molarity of the hydrofluroic acid solution? Answer: 0.502HF 2. A 35.00 mLsample of NaOH solution is ... 
Physics, check my answer pls
4. All of the following are true about torque except: A. its units are Newtonmeters. B. it can only be produced by a force. C. torque is zero unless the force is pointed perpendicular to the moment arm. D. a force whose line of action passes through the axis of rotation ... 
Greece
4) THe Aegean Sea \occupies a graben, an area of land that has dropped down between two faults. True or False my answer: True 5) Mountans in Greece A) are densely populated B) make difficult travel C) have good farmland D) all of the above my answer: B 8) All of the folloing ... 
accounting
indicate whether the following items in a bank reconciliation should be: A)Added to the check book blance B) DEDUCTED FROM THE CHECKBOOK C)added to the bank statement balance D) deducted from the bank statement balance 1) outstanding deposit of 1,200 is a,b,c,or,d. i think b ... 
accounting
indicate whether the following items in a bank reconciliation should be: A)Added to the check book blance B) DEDUCTED FROM THE CHECKBOOK C)added to the bank statement balance D) deducted from the bank statement balance 1) outstanding deposit of 1,200 is a,b,c,or,d. i think b ... 
calculus verify answer
Evaluate the limit: Limit as x approaches 6 from the right: Sq.root of (x  6). I know the limit is 0, but how do I show this? Thanks in advance. 
calculus
how do i get the answer for this limit limit x to 0 (4^2x1) without using direct substitution my work so far is limit x to 0= (4^2x1) = (4^2x/4^1) is it correct? 
Calculus
The length of a curve for 0 <= x <= 20 is given by the integral from 0 to 20 of √(1 + 84x^4) dx. If this curve contains the point (1,11), what is the equation of the curve? My answer is 3x^3 + 8. 
Algebra: CHECK
1. Find the slope of the line containing the points (6, 4) and (1, 6). a. 1/3 b. 5/4 c. 2/5 d. 3 Answer: D 2. Find the slope of the line containing the points (8, 1) and (7, 9). a. 11/ 15 b. 5 c. 13/5 d. 8 Answer: b PLEASE ANSWSER 
Algebra
Can someone check my answers? 1. Write the equation of the line that passes through point (–2, 3) with a slope of –4. Answer: y = 4x  5 2. Find the slope and yintercept. x = –8 Answer: Slope: undefined; yintercept: none 3. Write the equation of the line which has y... 
sociology
The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Nonacceptance; acceptance B.) Neutrality; nonacceptance C.) Nonacceptance; neutrality D.) Neutrality; tolerance I think ... 
sociology
The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Nonacceptance; acceptance B.) Neutrality; nonacceptance C.) Nonacceptance; neutrality D.) Neutrality; tolerance I think ...