# Calculus (Answer Check)

85,687 results, page 9

### Algebra: Answer Check

K(x) = -3x^4 + 5x^3 - x + 7 for x = -2. K(-2) = -79

### Algebra: Answer Check

(x^2 - 8x + 6)/(x + 2) = x - 10 + ((26)/(x + 2))

### English

pLease check my answer Which sentence has a subject complement 1.The nurse felt my pulse 2.I felt much better. 3. The day ended with many surprises. 4. We can't leave without seeing her. I pick answer #1

### Dog Hunting Training

Please check my answer thanks :) Dogs must meet these qualifications to participate in AKC performace events ? My answer Be at least six months old and registered with the AKC

### math check

Consider the following set of data. Pairs 1 2 3 4 5 Sample A 2 8 7 9 2 Sample B 7 8 1 1 8 Find the standard deviation sd of the paired differences. (Give your answer correct to two decimal places.) My answer was 5.00.

### Check My Answer! :)

What is the surface area of the square pyramid if the altitude is 4 cm, the length is 6 cm, and the height is 5 cm? a. 48 cm^2 b. 144 cm^2 c. 156 cm^2 d. 96 cm^2 i think the answer is 144 cm^2. Please show me how you did the work so then i know that i at least got partial credit.

### Chem Question?

I answered this question already, but would like you to check if the answer I provided was right. If for some reason my answer was not right please provide me with the right answer. 1)The air in the inner tube of the tire of a racing bike has a pressure of 115 psi. Convert ...

### check my answer? :)

ok, the question was "is the following ratios equivalent?" the ratios are 3:5 and 5:7. my answer is "no". is that right? you are correct. The way to know is divide the 3 by 5 and the 5 by 7 If the numbers are different, the ratios are not equal. Get it?

### Algebra; check please?

A television has a diagonal of 10 inches and a width of 8 inches. what is it's height? i think the answer is nine inches, am I correct? If I am not how do I find the answer?

### Math - check answer

Given v = 4t - 9t3, find the acceleration when t = 1 s. acceleration in m/s2 = My Answer V'=4-27t2 V"= -54t V"(1)= -54 acceleration in m/s2 = positive 54 Can you please confirm this is correct???? Thanks

### Algebra

Please check my answers. Thanks! Solve the polynomial equation. In order to obtain the first root, use synthetic division to test the possible rational roots. 5.2x^3-13x^2+22x-8=0 -My answer:{1/2,2,4} 6.x^3-8x^2-x+8=0 -My answer: {1,-1,8} Find the rational zero of the ...

### algebra(check)

1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c 3)Find the sum of ...

### mATH

1. Compare using <,>, or =. -15 and -21 A < (MY ANSWER) B > C. = 2. Which nuumber is greater than -24? A -42 B-27 C -16 (MY ANSWER) D -30 3. Which set of integers is ordered from greatest to least. A -13, 4, 0, -8 B -5, -2, 3, 1 C -12, -8, -4, 7 (MY ANSWER) D 4,6,7...

### math

Can somone check this for me. Directions: Identify the property that is used. (1) 5+(6+7)=5+(7+6) My answer: The commutative property of addition (2) 4 x(3+2)=(3+2) x 4 My answer. The communtaive property of multiplication right on both.

### Precalculus

1. Determine the interval(s) on which x^2 + 2x -3>0 a)x<-3, x>1 b)-3<x<1 c)x<-3, -3<x<1, x>1 d) x>1 Answer is D, x>1 --------------------------------------- 2. Determine when the function f(x)= 3x^3 + 4x^2 -59x -13 is greater than 7. a) -5<x...

### Math - check answer

Given v = 2t3 + 87t2 - 636, determine the acceleration for t= 1 s. acceleration in m/s2 = My Answer v'= 6t^2+174t V"= 12t V"(1) = 12 acceleration in m/s2 = 12 Can you please confirm this is correct.. Thanks!

### math answer check

x is a binomial random variable. (Give your answers correct to three decimal places.) (a) Calculate the probability of x for: n = 1, x = 0, p = 0.15 P(x) = Changed: Your submitted answer was incorrect. 0.15 x 0 = 0 . (b) Calculate the probability of x for: n = 3, x = 3, p = 0....

### calculus

Maximize p = 2x + 2y subject to 4x + 8y 24 8x + 4y 32 x 0 , y 0 (Round all answers to the nearest 0.1.) p = Incorrect: Your answer is incorrect. x = Incorrect: Your answer is incorrect. y = Incorrect: Your answer is incorrect.

### Math - check answer

Given s = 4t + 11t3, find the velocity when t = 1 s. velocity in m/s = My Answer: S'=4+33t^2 =4+33 =4+33 =37 velocity in m/s = 37 Can you please confirm this is correct. Thank you

### chemistry (Pls Bob check for me)

A 1.2g mixture of na2c03 and k2c03 was dissolved in water to form 100cm3 of s solution, 20cm3 of this solution required 40cm3 of 0.1N hcl for neutralization. Calculate the wieght of na2c03 and k2c03 in the mixture The answer 0.4G My own calculation: na2c03 weight = 106g/2 = ...

### Calculus check

The smallest slope of f(x)=6x^2-x^3 for 0 is less than or equal to x is less than or equal to 6 occurs at x= A. 0 B. 2 C. 3 D. 4 E. 6 I got E

### Inequalities Answer Check

1. 2n > 14 Answer: n > 7? 2. (n/5)≥ 11 Answer: n ≥ 55 3. -3y ≤ -18 Answer: y ≥ 6

### Calculus

Answer the following questions for the function f(x) = sin^2(x/3) defined on the interval [ -9.424778, 2.356194]. Rememer that you can enter pi for \pi as part of your answer. f(x) is concave down on the interval ? Please help, im REALLY stuck.

### calculus

im using chain rule to answer this question: -5 ((x^2) - 4x + 1)^(1)/(2) tried to use calc to get answer to base off of but this is a nonreal number. does this mean i will have to use imaginary numbers? please help

### Chemistry(Please check)

1) The Ka for acetic acid is 1.8e-5. What is the pH of a 3.18M solution of this acid? I did 1.8e-5 = x^2/3.18 x=sqrt 1.8e-5 X 3.18 = 7.56e-3 pH=-log(7.56e-3) = 2.12 The pH is 2.12 2) At 25 degrees celsius, the pH of a 1.75M NaCN solution (the Ka for HCN is 4.0e-10) is ? 4.0e-...

### algebra

Could you please check my answer to this problem: Simplify the expression Original problem: (3x^2+10x-8)/(3x^2-17x+10) x (2x^2 + 9x -5)/(x^2 + 3x-4) The answer I got was: (3x +4)(x-2)/ (3x-2)(x-5) x (2x-1) ( x +5)/ (x +4) (x-1) so basically the problem could not be simplified ...

### Math

help with these questions~ Thank you 1. Determine the interval(s) on which x^2 + 2x -3>0 a)x<-3, x>1 b)-3<x<1 c)x<-3, -3<x<1, x>1 d) x>1 Answer is D, x>1 --------------------------------------- 2. Determine when the function f(x)= 3x^3 + 4x^2 -...

### Help! Urgent!

You know tangentTheta=h/4 take the derivative sec^2 Theta * dTheta/dt= 1/4 dh/dt you know dtheta/dt solving for dh/dt You know sec Theta from the right triangle: sec theta = sqrt(h^2 +16) /h check me. Georgina: in the future, please put the title in the subject box, in this ...

### Math check

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 2.71 was my answer. .

### Math (Pre-Calculus)

Find an equation of the line containing the points (8,-6) and (8, -4) so far i've tried y-y1=m(x+x1) but currently cannot get the answer....T-T the answer is suppose to be x=8 plz show the work so i can study form it and do it myself the next time... thnx in advance

### Calculus

I have tried calc-chat's method and I always get the answer 12 units but the answer should be 69 according to my key! What do I need to do to get there?? "Use the limit process to find the area of the region between f (x)=10x+8 and the x-axis on the interval [0,3]"

### Check: Geography

1.The Soviet program of creating cotton fields in central Asia had disastrous consequences for: a. the Caspian Sea b. the Aral Sea c. Lake Baikal d. the Black Sea answer: B 2.What occurred after the fall of the Ottoman Empire? a.The Seljuk Turks conquered almost all of ...

### algebra

I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9 c.an=6n-9 d.an=n-3 ...

### algebra

I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9 c.an=6n-9 d.an=n-3 ...

### algebra

I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9 c.an=6n-9 d.an=n-3 ...

### Algebra 1--Please, check my answer!

1. A city map is laid out on a coordinate plane. Elm Street is described by the line x + 2y = -6. Oak street intersects Elm Street at an right angle. Which of the following could be the equation for Oak Street? a. 2x + y = 5 b. -2x + y = 3 c. x + 2y = 4 d. -x - 2y = 8 My ...

### Math Calculous

Q = 16.8*10^-0.22t Give the starting value a, the growth rate r, and the continuous growth rate k. Exact answer for a, Round the answer for r and k to two decimal places a = 16.8 r = 10 k = -22% Can someone check my answer? I do not think the values for r and K are correct. I ...

### Algebra-Please check-I must have done something wr

Please help-What is the equation of the ellipse with foci (0,6), (0,-6) and co-vertices (2,0),(-2,0) My answer and logic is below but it can't be correct I thought the answer would be x^2/4 + y^2/40 = 1 but that can't be because the choices are: x^2/1 + y^2/40 = 1 or x^2/1 + y...

### Math

I don't know if my answer for this question is correct but can you please check? 1.) Between which pair of numbers does the square root of 15 lie? Do without using a calculator. A.) 3.7 and 3.8 B.) 3.8 and 3.9 C.) 3.9 and 4.0 D.) 14 and 16 I think the answer to this might be A...

### math

please check and see if my answers are correct if not let me know so i can redo these and find where i messed up 1. divid by moving the decimal point 27.3 dived 10^5 my answer .000273 2.Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. ...

### Algebra II repost- please check

I posted these a little while ago but this time I have answered them. 1. Does the graph of y = x – 3x2 + 5 have a maximum or minimum? 2. What is the vertex of the graph of y = -2(x - 3)2 + 4? 3. Does the graph of y = -2(x - 3)2+ 4 open up or down? My answers: 1. I cannot ...

### Math/Algebra

Could you also check these to. Thanks. (4x^2 + 9x - 1) - (5 - x^2) Answer: 5x^2+ 9x - 6 (8 + 7a + 10a^2) - (a^2 - 3a - 2) Answer: 10 + 10a + 9a^2

### Math/Calculus

Integrate: (2x^2+5)/((x^2+1)(x^2+4)) I came up with: (tan^-1)(x)-(1/2)((tan^-1)(2/x)) but it keeps coming back the wrong answer even though I integrated correctly. Is there a way to simplify this answer, and if so, how? Your answer is correct, but I think you are supposed to ...

### Physics

A capacitor is made from two 1.2 cm diameter coins separated by a 0.18 mm thick piece of paper (K = 3.7). A 6 V battery is connected to the capacitor. How much charge is on each coin? My solution: C= K * Permitivity * A/d = q/v I solved for q and got 1.2 X 10^-10 But i still ...

### Physics -- check answers please

1. If 31 waves pass by a point in 1.7 s, what's the frequency? my answer: 18.2 Hz 2. if a crest with an amplitude of 7cm interferes with a trough with an amplitude of 10 cm, the resulting wave has an amplitude of: my answer: -3

### Math - Please Check My Answer

Please help me with the following: Find the greatest possible error for each measurement. 4 1/2 oz A. 1/4 oz B. 2 1/2 oz C. 1 oz D. 2 1/4 oz I know it is not B(I got it wrong.), but I think it is A. Is this correct? Please help me by checking my answer. Any help is appreciated...

### French part 2

Could you check these please thanks Directions: Choose the correct verb to complete each phrase. Here are the verbs you can choose: passer, enregistrer, sortir, remplir, servir, choisir, and attacher. 1. -------- une place coté couloir. Answer: Choisir 2. ------- par le ...

### french

Can you check these. Thanks Un petit accident (Fill in the blanks) 1. Il a eu un petit ---------. Answer: accident 2. Qu'est-ce qui lui est -------? Answer: arrivé 3. Il a ------ sur une peau de banane. Answer: glisse 4. Sur une peau de banane? Et il est --------? Answer: ...

### chemistry check my answer

In an acid base titration 32.5 ml of sodium hydroxide were neautralized by 17.6 ml of 0.180 mol/l sulfuric acid. Calculate the concentration of the sodium hydroxide. I asked this question earlier but i wanted to make sure i got the right answer My answer: 0.36 mol/L is this ...

### Spanish-Please check

Could some one please check these-I had to answer them in the past tense which is still confusing me-I think most of them are correct-Thank you 1.¿Comó te sentiste ayer? Yo sentí muy bien. 2. ¿Adonde fuiste ayer? Yo fui al cine. 3. ¿Adonde fue tu mama ayer? Mi mama fue a ...

### Pre-Calc Answer Check

1. Find a polynomial with a zero at 3 and a zero of multiplicity 2 at -1. My answer: x^3 - x^2 - 5x - 3 = 0 2. Find the zeros and multiplicities of f(x) = x^5 - 16x^4 + 64x^3. My answer: x = 0 of multiplicity 3 and x = 8 of multiplicity 2.

### Chemistry

Can you please someone check my answer for me? I don't know how to start thses answer. Chemistry is not my things. Please give me answers. :( a)Determine the number of grams in 0.750 moles of the compound Iron(II)phosphate: Fe3(PO4)2. Answer: ? b)How many atoms of iron are in ...

### Physics-Please check answer

Damon helped me with this calc but I think the answer should be -20, not -22, could someone please check the calculation If a ball is thrown into the wall at 14 m/s and comes off at 6 m/s, what is change of velocity of the ball? I think it would be 14-6 = (-8 m/s) Is that ...

### CALCULUS!! OH DEATH!!!

I need to solve: Lim as x is approaching 1/4, for (4x-1)/(1/ ([square root of x] minus 2)). Help would be greatly appreciated!!! It's trivial using L'Hopital's rule. Answer: -64 Correction, the answer is -1. what is l'hospital rule?

### Pre-calculus

Write the standard form of the equation of the circle that is tangent to x= -2 and has its center at (2,-4). Answer:(x-2)^2+(y+4)^2=16 Is this correct? 2) Find the area of the region between the graph of y=x^3 and the x-axis from x=1 to x=4 Answer: 63 3/4 units Is this correct...

### spanish/check please

choose the best words A ver, ( primer,primero), me diez cosas o mas antes de llegar a la escuella en la manana. answer: primero (seguanda, segundo ) , me levanto answer :seguando la ( tercera, tercer)accion es banarme. answer:tercera ( septimo, septima) , me lavo los dientes. ...

### Math

your aunt gives you a check on your birthday each year. on your first birthday , she gives you a check for one cent. the next year she gives you 3 cents , then 9. each year she triples the amount of the previous year 's check. how old will you be when she gives you a check ...

### please check

(2x)^5 (3x)^2 Answer: 288x^7

### math

Please Check x - 1/4 > 5/8 answer x > 7/8

### math

Please check x + 1/3 > 5/4 answer x > 19/12

### math

please check -2x + 7 < 10 answer x < -3/2

### Math check 3

Simplify: 9/(y+8)-y/(y-2)+(y^2+4)/(y^2+6y-16) IS the answer y-14/(y-2)(y+8)?

### Math check

subtract: 3+5i-(-4+6i) is the answer 7-i?

### math check

subtract: 3+5i-(-4+6i) is the answer 7-i?

### math

can you check if answer is right? a^2b -c when a=4 b=8 and c=12

### beginning algebra-check my answer

[(x^2-1)/(x-3)] / [(x^2-x-2)/(3x-9)] I get (3x-3/x-2)

### math

Check my Answer Ms.Sue

### math

P=2L+2W+L Please check my answer L=P-2w/2

### Math 8 - HW. Qs. Check

12 + v/2 = 17 My Answer - 10 right?????

### Algebra 1

Solve. Check your answer. 1. ((3x-7)/(x-5)) + ((x)/(2)) = ((8)/(x-5)) A: ?

### Algebra 1

Solve. Check your answer. 1. ((d + 2)/(d + 8)) = ((-6)/(d + 8)) A: ?

### Algebra Answer Check

(7x^3 + 2x - 1) + (8x^2 - 6 + 2x - x^3) Ans: 6x^3 + 8x^2 + 4x - 7

### Chemistry

Can you check my answer for the PH question @12:04 11/20?

### tenant relations

check my answer 1-b 2- a 3- b 4- b 5- a

### precalc (check answer)

l(x)=3-x^2 l(x)=7 x=-2 am i correct?

### math

m - 7 <6 m < -1 *** m > 1 m < 13 m < -13 please check my answer!!!!!!

### Math

if p=8 evaluate 4^2/p•3 2 3 6<---- 8 Check my answer

### Calculus (Answer Check)

Are my answers right? If they are wrong you don't have to tell me how to do it its okay =) A particle starts at time t=0 and moves along the x-axis so that its position at any time t(greater or equal to) 0 is given by x(t)=(t-1)^3 (2t-3) 1.find the velocity of the particle at ...

### math.can someone check my answers?

can someone check my math answers its only 5 questions thanks. please check my answers ! 21. Find the unit price for each option shown below. Round to the nearest cent when necessary. Indicate which option is the better buy. Option I: 10 candy bars for $6.75 Option II: 12 ...

### Algebra - please check my answer for me

The population increased 80 percent in 5 years. The current population is 18,000. find five years ago. 18,000 * 0.80 = 14,400 18,000 - 14,400 = 3,600 3,600 is the population five years ago? to check: 3,600 * 5 = 18,000 Is 3,600 the correct answer. Was this problem done correctly?

### Social Studies check my answers please

1. Who invented the sewing machine? A.Elias Howe******* B.Robert Fulton C.Samuel Morse D.John Deere Answer A. 2. By 1860 the Midwest and the east were united by a network of_____? A. Roads B. Railroad tracks**** C. Canals D. Steam-powered ships Answer B 3. Which invention ...

### Spanish-Please help!!

Hi I posted early and got a response but the correction suggested can't be corret. Could someone please check these answers-I had to answer in past tense-- Could some one please check these-I had to answer them in the past tense which is still confusing me-I think most of them...

### Math - Answer Check

Write the composition function and then find the value. f(x) = 2x+3 g(x) = x^2 k(x) = square root(x - 4) 1. g(k(x)) g(k(20)) My answer: Function is x - 4, the value is 16. 2. f(g(x)) f(g(2)) My answer: Function is 2x^2 + 3, the value is 11.

### Algebra

In an interview of 50 math majors, 12 liked calculus and geometry 18 liked calculus but not algebra 4 liked calculus, algebra and geometry 25 liked calculus 15 liked geometry 10 liked algebra but neither calculus nor geometry 2 liked geometry and algebra but not calculus. Of ...

### Calculus, check my answers, please? :)

Okay, so I think these are right, but I would appreciate if someone could check them and tell me if something is wrong and what the right answer is. I'd also appreciate an explanation if possible. :)Thank you! 7. Given that f(x)={x^3 if x ≥ 0 {x if x < 0 which of the ...

### Calculus Check

The region R is bounded by the x-axis, x = 1, x = 3, and y = 1/x^3. Here is what I have so far: Radius = 1/(x^3) Area of Cross Section = pi(1/(x^3))^2 Simplified: pi(1/(x^6)) Volume = (definite integral from 1 to 3) pi(1/(x^6)) dx = pi( -1 / 5(3)^5) - pi(-1 / 5(1)^5) = pi (-1...

### calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not able to figure ...

### Math

Please double check In a bottling company, a machine can fill a 2-liter (l) bottle in 0.5 second (s) and move the next bottle into place in 0.1 s. How many 2-l bottles can be filled by the machine in 2 h? Answer: 1.00 or 0.20 A circular coffee table has a diameter of 5 ft. ...

### Math URGENT!

the roots of a tree are 1/8 of the tree. they are 0.87 m. how tall is the tree? my answer: 0.87 x 7 = 6.09 m please check if my answer is right thanks :)

### Reading plz check my answer!!?

Which words of the singer in "The Weary Blues" show his communication about life? "I's gwine to quit ma frowning" "And put ma troubles on the shelf" <-my answer "And I wish that I had died" "Ain't got nobody but ma self"

### College Algebra~ Check answer please

Can someone check my answers please. The formula for calculating the amount of money returned for an initial deposit into a bank account or CD (certificate of deposit) is given by A=P(a+r/n)^nt A is the amount of the return. P is the principal amount initially deposited. r is ...

### accounting for investments

Can someone check my answers. -For each of the following eight situations, select the best answer concerning accounting for investments: (A.) Increase the investment account. (B.) Decrease the investment account. (C.) Increase dividend revenue. (D.) No adjustment necessary. 1...

### Health care

Please check my answer thank you :) Verifying the accuracy of ICD-9-CM and HCPCS codes is an important function in 1.maintenance of charge masters 2.maintenance of the OASIS data set 3.blended payment I think that the answer is 1.

### Agility Training

Please check my answer thanks:) During a USDAA agility trial, a dog exits the entrance of a tunnel. What is this type of error called? A. Wrong course B. Fly-off C. Run-out D. Refusal My answer is D

### chemistry (Pls Bob check for me)

what mass of 25% ba(n03)2 solution contain 40 grams of ba(n03)2 ? Answer 160g My calculation 40g/261.37g/mol = 0.15305/0.25g = 0.612 This answer is not right Who helps

### Language Arts

The narrator of stolen day says his family often laughs at him.How does he react when they do? A.He wishes he were an orphan. B.He dislikes everyone he knows. C.He appreciates the attention. D.He dislikes being teased. My answer is D. can you please check my answer?

### Calculus, Riemann Sums

Measurements of a lake’s width were taken at 15-foot intervals, as shown: x= 0 15 30 45 60 75 90 105 120 f(x)= 0 15 18 20 19 23 24 22 12 Estimate integral (0,120) f(x) dx with n = 4, using Midpoint approximation. For this question, I ended up with 7200 but compared to the ...

### calculus

If 800 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? Answer to the nearest square foot without commas. For example, if the answer is 1,000, write 1000.

### English

1. You need to check the time. (What kinds of time should be checked acording to the sentence? Does ' check the time' have a lot of meaning according to the context? Does it also mean "Check what time it is now.?"