Calculus (Answer Check)
88,703 results, page 40

chemrepost
I ddin't know if anybody would look far down to page to help me answer my question but this is what was said so far. Posted by rebekah on Sunday, October 24, 2010 at 4:48pm. Give the general formula for any dialkene; that is, a straightchain hydrocarbon with two double bonds ... 
English
Ethan Frome test please check my answers and correct if they are wrong 4. Which word best describes the atmosphere, or mood, of the Prologue and Chapter I? A. jolly B. comfortable C. severe D. superstitious B is wrong Answer c 11. What kind of conflict describes the struggle ... 
Java Programming
Hi! ____ 6. Which of the following shows a valid header for a method that accepts any number of double values and returns an array of double values? (1 point) a) public static double... convert(double... d) b) public static double... convert(double[] d) c) public static double... 
BUS 101
Please check my answers. 1. According to the influential economist Milton Friedman, corporate social responsibility is primarily based on A. meticulous care of the environment. B. making money for shareholders. C. repudiating insider trading. D. making safe, highquality ... 
Economics
1. The employees of Abs "R" Us, which includes 12 fitness parlors in and around the metro area, feel they can improve the performance of the company. This would be called a ______ buyout. A. Leveraged C. Negotiated B. hostile D. Management Answer: A 2. According to the ... 
Economics
1. The employees of Abs "R" Us, which includes 12 fitness parlors in and around the metro area, feel they can improve the performance of the company. This would be called a ______ buyout. A. Leveraged C. Negotiated B. hostile D. Management Answer: A 2. According to the ... 
Math
What is the percent increase in the population for all six inhabited continents from 1950  2000? 1950 2000 N.America 221,000,000 305,000,000 S.America 111,000,000 515,000,000 Europe 392,000,000 510,000,000 Africa 229,000,000 889,000,000 Oceana 12,000,000 32,000,000 Antarct. 2... 
Business Finance  Check/Help
Smith Manufacturing is considering the sale of two non depreciable assets, A and B. Asset A was purchased for $2000 and will be sold today for $2250. Asset B was purchased for $30,000 and will be sold today for $35000. The firm is subject to a 40% tax rate on capital gains. 1... 
calculus
The maker of an automobile advertises that it takes 10 seconds to accelerate from 30 kilometers per hour to 90 kilometers per hour. Assuming constant acceleration, compute the following. (a) The acceleration in meters per second per second (Round your answer to three decimal ... 
history
To find new territory for a growing population, the Song rulers A. purchased lands from neighboring peoples. B. colonized underpopulated areas to the southwest. C. sent people to unpopulated regions to the north. D. conquered territories by military force can someone check my ... 
Calculus (area of base and volume of solid)
Can you check my work and see if I did the problem correctly? Thanks! A solid with a base formed by intersecting sine and cosine curves and built up with semicircular crosssections perpendicular to the xaxis. Find the area of the base and the volume of the solid. Integral... 
Math ; please please help.
1. Explain in detail how to determine the value of the independent variable in a quadratic relation if the value of the dependent variable is known. Please check my answer  You would substitute the value for the dependent variable, then you would solve for the independent ... 
History
4) The Roosevelt Corollary says: A) That Europe could no longer expand and colonize North America. B) That America would support Latin American countries economically. C) That America could intervene in Latin American countries to prevent further European involvement. D) ... 
Math
Zack orders a box of 80 sweaters manufactured from a factory. He needs to check the quality of 30% of the sweaters. Select all of the equations that Zack could use to find x, the number of sweaters he needs to check. 
math
Zack orders a box of 80 sweaters manufactured from a factory. He needs to check the quality of 30% of the sweaters. Select all of the equations that Zack could use to find x, the number of sweaters he needs to check. 
Math/Calculus
Please check my work and correct any errors/point out any errors. Thanks. Solve the initialvalue problem using the method of undetermined coefficients. y''4y=e^xcos(x), y(0)=1, y'(0)=2 r^24=0, r1=2, r2=2 yc(x)=c1*e^2x+c2*e^2x yp(x)=e^x[Acos(x)+Bsin(x)] y'p(x)=e^x[Asin(x... 
english grammar check please
parts of speech 1.Mason is fantastic at gossamer billowing. my answer: Mason=noun, is=verb fantastic=adjective at=preposition gossamer=adjective billowing=noun We get to go home early on Wednesday. my answer: We=pronoun get to go=verb home=noun early=adverb on=preposition ... 
Health/ Basic Clinical Procedures
please check my answer thanks True or False The purpose of OSHA Bloodborne pathogens Standards is to prevent exposure of employees to bloodborne pathogens I said True 
V A Hospital
please check my answer thanks so much for your help True of False The V A hospital is most likely to use the Social Security Number as a medical record number in its filing system I said True 
Applied Dog Behavior
please check my answer thanks You're using punishment to get rid of a particular behavior. You should keep using the same punishment for three to five tries I said True 
Applied Dog Behavior
Please check my answer thanks Fearfulness as a trait appears to be A. more common in females. B. hereditary and a dominant trait. C. more common in males. D. random and rare. I picked B 
College Algebra
Find all solutions of the equation. Check your solutions in the original equation. (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) 16t^2/3 + 40t^1/3 + 25 = 0 
Algebra 1 check answers
If you were solving a system of equations and you came to a statement like 1 = 3, what do you know about the solution to the system? The solution is (1, 3). The solution is x = 1 and y = 3. There is no solution. There are infinitely many solutions. I think the answer is D or B... 
calculus
find the function that is finally graphed after the following transformations are applied to y=square root x in the order listed. a. reflected about the xaxis b. shift up 7 units c. shift right 5 units y=? would the answer be: y=sqrt(x5)7 
calculus
Using an uppercase "C" for any arbitrary constants, find the general indefinite integral ∫ (2t)(9t^2) dt Now I multiplied both parentheses to get: ∫ (18 + 2t^2 + 9t + t^3) dt now I integrated and got: 18t + 2t^3/3 + 9t^2/2 + t^4/4 + C but I'm told this answer ... 
Calculus
Two people start from the same point. One walks east at 5 mi/h and the other walks northeast at 7 mi/h. How fast is the distance between the people changing after 15 minutes? (Round your answer to three decimal places.) 
Calculus
A deposit of $5,000 at 4% interest compounded continuously will grow to V(t) = 5000e^0.04t dollars after t years. Find the average value during the first 20 years (that is, from time 0 to time 20). (Round your answer to the nearest cent.) 
Calculus
A spring has a natural length of 18 cm. If a 22N force is required to keep it stretched to a length of 24 cm, how much work W is required to stretch it from 18 cm to 21 cm? (Round your answer to two decimal places.) Arg, another question that has me stumped! Would love some ... 
dog behavior
please check my answer thanks In Pavlov's experiment with the bell and the food, what is the dependent variable A. Pairing the food and the bell B. giving the food C. ringing of the bell D. salivation I picked B 
childcare
plz check theses When parents ask for advice that you aren’t capable of giving, you should refer them to a A. parent discussion group. C. resource file. B. guest speaker. D. parent handbook. answer(c) Parents should view a parentcaregiver conference as a time to be used ... 
calc check: euler's method
Given the differential equation: dy/dx = y(1+x), y(0)=1, Use Euler's method with step size .1 to approximate y(.3). y' = y(1+x), y'(0) = 1(1+0)=1 >the solution has slope 1 at the point (0,1); x0=0, y0=1, h=0.1, F(x,y)=y(1+x) y1=y0+h*F(x0,y0) y1=1 + 0.1(1(1+0)) y1=1.01 y2=1... 
math please check and help!!!!
what is the vertex and line symmetry for f(x)=1/2(x+8)^2+4 and what is the max/min value of f(x)? Is the answer for the vertex (8,4) is the min value of f(x) (8,4) 
Math  Answer Check
Prove that circle A with center (–1, 1) and radius 1 is similar to circle B with center (–3, 2) and radius 2. From A to B: (x  2, y + 1), scale factor 2? 
Math
Please check my answer.. Find a point E on segment CD such that the ratio of segment CE is 5/8 C is placed on (9) and point D is placed on 7. A. 8 B.1~~~ C. 1 D. 3 
geometry (check answer)
Determine whether the line through (0, 4) and (2, 0) and the line through (−2, 3) and (−4, 2) are parallel, perpendicular, or neither. neither? 
calculus
Approximate the area in the first quadrant between the xaxis, the yaxis, the line x = 3, and the function f(x) = x^2+1 For this approximation, you must use 6 rectangles of equal width, and this must be a lower sum. In your answer, you must include letters ad below: a. The ... 
behavior problems (dogs)
please check my answer thanks An unwanted behavior persists because the A. behavior elicits a reward. B. dog has a temperament fault. C. trainer doesn't use treats as rewards. D. owner doesn't know how to punish the dog effectively. I picked A 
Physics
Could someone please check another one of my answer for me? Thank you! A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what is her ... 
calculus book
sorry i am new to this website. Do any of you know any website that offer free or cheap online book. Calculus Early Transcendentals, 10th Edition NEW! Howard Anton, Irl C. Bivens, Stephen Davis THANK U. 
Public Speaking Please Check
1. (TCO1) The route used to transmit messages is known as: my answer:decoding encoding decoding feedback noise channel 2. (TCO1) As Claire tells about her trip to the museum, she notices Emma and Brian yawning. The information that Claire is receiving is known as: My answer: ... 
Math ~ CHECK ANSWER
Below are two sets of student quiz scores on a 30point quiz. Which of the following can you conclude by comparing their boxandwhisker plots? Class A: 5, 10, 13, 18, 19, 25, 29 Class B: 1, 3, 5, 7, 9, 9, 13 a) The first quartile of class B is greater than the third quartile ... 
Calculus
Find derivative: (write answer as single fraction) y=ln((4x1)/x^3) So far I have: y'=(4/(4x1))3/x How do I write as single fraction let u= (4x1) v= x^3 dy/dx= d y/d(uv) * d(uv)/dx dy/duv= 1/uv d(uv)/dx= udv/dx + v du/dx put it together. 
calculus
Solve for x: S(0 to x) (t^32t+3)dt=4 I got a different answer from the back of the book. The back of the book said that x=1.63052 or x=3.09131. How am I suppose to solve this using a calculator? 
calculus
Find parametric equations for the line through the point P(2, 9, 4) that is parallel to the plane x + y + z = 6 and perpendicular to the line x = 5 + t , y = 5 − t , z = 5t . Answer Choices: 1. x = 2 + 6t, y = 9 + 4t, z = 4 + t 2. x = 2 + t, y = a + t, z = 4 − 2t 3... 
AP Calculus AB
Which integral gives the area of the region in the first quadrant bounded by the axes, y = e^x, x = e^y, and the line x = 4? The answer is an integral. I know y=e^x has no area bounded, but I don't know how to incorporate it all. 
Calculus
A square is inscribed in a circle. If the area of the circle is 144(pi)cm*squared* sorry the square root thing isnt showing up. Then the exact perimeter of the square is... I really don't get how to solve this, but the answer is supposed to somehow be 48V2 cm 
Calculus
A rectangle has area 64 m2. Express the perimeter of the rectangle as a function of the length L of one of its sides. State the domain of P. (Assume the length of the rectangle is larger than its width. Enter your answer using interval notation.) 
calculus
if a snowball melts so that its surface area decreases at a rate of 1 cm^2/min, find the rate at which the diameter decreases when the diameter is 43cm. Leave pi in your answer please. 
calculus
Let f(x) = (x − 3)−2. Find all values of c in (2, 5) such that f(5) − f(2) = f'(c)(5 − 2). (Enter your answers as a commaseparated list. If an answer does not exist, enter DNE.) C=? 
PreCalculus
What is the equation of the line passing through (4, 2) and perpendicular to the line passing through the points (9,7) and (11,4)? Here's what I did: (74)/(911) = 3/2 y2= (2/3)(x4) y2=(2x/3) + (8/3) y = (2x/3) + 14/3 but the answer key says that it's y=(2x/3)  (2/3) ... 
Calculus III
Use symmetry to evaluate the double integral ∫∫R(10+x^2⋅y^5) dA, R=[0, 6]×[−4, 4]. (Give your answer as an exact number.) ∫∫R(10+x^2⋅y^5) dA= 
Calculus
Use Euler's method with step size 0.2 to estimate y(1.4), where y(x) is the solution of the initialvalue problem below. Give your answer correct to 4 decimal places. y' = x  xy y(1) = 0 h = 0.2 Since I am at y(1) = 0 and not y(0) = 0 would I just do this twice? As in: y1 = 0... 
Calculus
Let 5x^2  3xy + 58 = 2y^3 Use implicit differentiation to find y' for the above equation. The first thing I did was move 2y^3 over to that everything is equal to 0. With the 3xy I used the product rule and expanded that. After solving I got.... 10x(3 * y + 3x * 1dy/dx) 6y^... 
math calculus
The concentration C (in milligrams per milliliter) of a drug in a patient's bloodstream t hours after injection into muscle tissue is modeled by C = 3t/26 + t^3 Use differentials to approximate the change in the concentration when t changes from t = 1 to t = 1.5. (Round your ... 
math calculus
The concentration C (in milligrams per milliliter) of a drug in a patient's bloodstream t hours after injection into muscle tissue is modeled by C = 3t/26 + t^3 Use differentials to approximate the change in the concentration when t changes from t = 1 to t = 1.5. (Round your ... 
English
Can you please check if these sentences are OK? Thank you. 1)Forensic science adopts different scientific methods to catch criminals. 2)In particular, scientists can examine a suspect’s fingerprints or check blood type. 3) They can also check teeth and look at dental records... 
Calculus
For the decomposition of Carbon 14, find the age of a prehistoric cave painting discovered in the Lascaux Caves in southern France if the amount of Carbon 14 has decayed to 14.29%...again using calculus formulas. Not sure how to use this equation (content section of course ... 
Introduction to Graphic Design
Hello! Thanks for checking my question out! ____ 8. Which of the following is one of the ways in which graphic design has become safer through technology? (1 point) a) New technologies, such as computer equipment and smartphones, can be discarded easily in landfills. b) New ... 
Calculus
Given the differential equation: dy/dx = y(1+x), y(0)=1, Use Euler's method with step size .1 to approximate y(.3). y' = y(1+x), y'(0) = 1(1+0)=1 >the solution has slope 1 at the point (0,1); x0=0, y0=1, h=0.1, F(x,y)=y(1+x) y1=y0+h*F(x0,y0) y1=1 + 0.1(1(1+0)) y1=1.01 y2=1... 
calculus
Given the differential equation: dy/dx = y(1+x), y(0)=1, Use Euler's method with step size .1 to approximate y(.3). y' = y(1+x), y'(0) = 1(1+0)=1 >the solution has slope 1 at the point (0,1); x0=0, y0=1, h=0.1, F(x,y)=y(1+x) y1=y0+h*F(x0,y0) y1=1 + 0.1(1(1+0)) y1=1.01 y2=1... 
calculus
What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the origin and ending at a point a,b b  /  /   /   /   /   r /   /   /   /   /   /  _____________a 
Calculus
Find the xcoordinates of any relative extrema and inflection point(s) for the function f(x)=9x^1/3+9/2x^4/3. I've gotten 0.5 as the relative minimum and x=1 for the inflection points. Is this correct? If not, can you show me how to get the correct answer please 
Calculus
Thank you  (Enter your answers using interval notation. If an answer does not exist, enter DNE.) y = 4x + [5/sin x], (−π, π) concave upward (x,y) concave downward (x,y) 
Health care
Please check my answer tahnks :) You are Doctor who wans to join together wth other HMO doctors but not give up your individual practice what would be your best choice for doing that I think it might be primary care physicain practice 
Chemistry
Mr.drwls help me to check if my answer is c0rrect,tnx anyways, what is the mass of calcium carbonate is required to react with sulfur dioxide produced by burning 1000 kgs of coal that contain 5% sulfur by mass? (0.781 kmole)(100kg/mole)=78.1 kg 
PreCalcPlease check answer
1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence 1/5,1/20,1/80 this was a geometric sequence so I said a(subscript10) = 1/5*1/4^(101) =1/5*(1/4)^9... 
PreCalcPlease check answer
1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence 1/5,1/20,1/80 this was a geometric sequence so I said a(subscript10) = 1/5*1/4^(101) =1/5*(1/4)^9... 
English
The main disadvantage of relying on a computer spell checker is that it A.takes too long to make the corrections B. can't distinguish between homonyms C.highlights all words that aren't in it's dictionary. D. may have too few words in it's dictionary. Ichose (C) can someone ... 
Math check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 10.025=0.975/2=.4875 looked up on z chart and got 2.... 
Statistic check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 10.025=0.975/2=.4875 looked up on z chart and got 2.... 
Child Development
A/an is a chracteristic of children at age five A. understanding of ramifications of one's action B. desire to play with children of different ages C. awardness with emerging motor skills D. slowing down of growth and development my answer is (D) can someone check this ... 
Physics  please check my answer
A man tosses a ball upward. It reaches its highest point after 25 seconds. Find its initial velocity. Alright, so I tried solving this. I used the equations (let v = initial velocity): h = v^2 / 2g , and h = (v*t)  (1/2)(g)(t^2) and I got 101.48 m/s. Is this correct? 
Calculus (can someone please verify this?)
Gravel is being dumped from a conveyor belt at a rate of 30 ft^3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 19 feet high? Vol = (1/3)pi (h^2/4)(h... 
calculus
find the equation of the tangent line to the curve y=5xcosx at the point (pi,5pi) the equation of this tangent line can be written in the form y=mx+b where m= and b= what is the answer to m and b? 
Calculus
How would I set this up in my calculator? Let F(x)=∫ ln(t^2) dt where a= 1 and b=3x . Use your calculator to find F"(1). I set it up and I got way the wrong answer. I got 2ln(1)=0 
cal
1. Given the function f(x) and g(x) below determine the following: A) f o g(3) ANSWER: B) f o g(4) ANSWER: C) g o f(0) ANSWER: D) f o f(1) ANSWER: E) g o g(2) ANSWER: 
Science(check answers)
I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldn't figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees. What is this an ... 
Diversity
1. Books such as The Three Little Pigs, Green Eggs & Ham or Good night moon promote children's cognitive & linguistic skills through the ___ strategy. a. reprtition b.eventcasts c. referential language d. recasting I chose "c"referential language can sme one please check it. ... 
Mathdue today, need a check
Please help me with this, below is a question I have to answer…below that is my answer…did I do, or answer this correctly? Post a response of at least 50 words to the following: Explain how to graph linear equations using the x and yintercepts. Provide an example to ... 
calculus I integral
Is this correct? Evaluate 2x∫1 3t(t^2 + 1)^2 dt u= t^2 + 1 du= 2t dt 1/2du=tdt 2x∫1 3u^2 1/2du 3/2 2x∫1 1/3u^3 + c 3/2 [1/3 u^3] 3/2(1/3(2x)^3)  3/2(1/3(1)^3) Answer= 4x  1/2 
Math calculus
The altitude of a triangle is increasing at a rate of 1000 centimeters/minute while the area of the triangle is increasing at a rate of 1500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters and the area is 89000... 
math
24= 2(b3)+8 I suppose you want to solve 24= 2(b3)+8 for b, am I right? If so, subtract 8 from both sides to get 16 = 2(b3) divide both sides by 2 to get 8 = b3 then add 3 to both sides to get 5 = b then check the answer 24 = 2(53) + 8 = 16 + 8 
math (calculus)
you have 704m of fencing to enclose 3 adjacent plots(not the same size) you must use calculus to fine the dimensions for which the total area is as large as possible. Find the largest possible total area. 
Math check answer
Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number? 
Math check answer
Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number? 
Math check answer
Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number? 
Math check answer
Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a spade if the first card was not a spade ? 13/51 is that correct, do I need to reduce this number? 
Algebra check+help?
What percent of 225 is 99? So then I wrote out 225 Over X and then I wrote = To 99/100? Is that what you would do? Because if you add up all percents, you should always get 100? Could someone correct me and help me get the right answer? THANK YOU! Allyson 
SpanishPlease check my answer
This is true or false A possessive adjective is a descriptive word that tells whose something is I think this is false because the possessive adjective describes the noun and not the person who has possession of the item. 
math(urgent)
$1000 was invested for two years at 10% simple interest .calculate the effective rate was earned. pls check my solve (1+0.1/2)^21 = 0.1025 but the true answer is 9.54% pls help me to get the formula of effective rate 
languge arts a
8. What form, or principal part, of the boldface verb is used? Everyone is leaving Sarajevo. present present participle***** past past participle **** marks my answer please check need help 
L.A.
A story’s resolution is its _____. A. rising action, or the most intense part B. ending, when the conflict is resolved C. beginning, when the conflict is introduced D. climax, or the most exciting part my answer is b. but im not sure could you check my answers 
Math/Algebra HELP
Can you please check these answers: 1. If the first Now= 9, which equation represents this sequence? 9, 4, 1, 6, 11 A. Next= Now 5 B. Next= Now + 5 C. Next= 5* Now 1 D. Next= 5* Now + 1 Answer: A 2. Which inequality statement is true? A. 8 < (a square root sign with 78... 
PreCalculus (Check)
Please tell me what I'm doing wrong... The side lengths of tops of three squares tables can be described as three consecutive integers. The combined area of the table tops is 677 sq in. Algebraically, determine the roots of the quadratic equation. (I'll use quadratic, but if ... 
Chemistry please check my work
Question: The following equilibrium was studied by analyzing the equilibrium mixture for the amount of HCL produced. LaCl3(s)+ H2O(g) goes to LaOCl(s)+2HCl(g). A vessel whose volume was 1.25L was filled with 0.0125 mol of lanthanum (III)chloride and 0.0250 mol H2O. After the ... 
Poem: Beware do not read this poem by Ishmeal Reed
Could someone please check these ASAP! 1. What story does the poem tell in the first three stanzas? Answer: The story that the poem is telling is a women who lived amoungst mirrors had locked herself in her house, and two villagers broke in, and she escaped into her mirror. ... 
FINANCE
Direct sendSingle. Ocean Research of San Diego, California, just received a check in the amount of $800,000 from a customer in Bangor, Maine. If the firm processes the check in the normal manner, the funds will become available in 6 days. To speed up this process, the firm ... 
Finance
Direct sendSingle. Ocean Research of San Diego, California, just received a check in the amount of $800,000 from a customer in Bangor, Maine. If the firm processes the check in the normal manner, the funds will become available in 6 days. To speed up this process, the firm ... 
calculus
If a snowball melts so that its surface area decreases at a rate of 3 cm2/min, find the rate at which the diameter decreases when the diameter is 9 cm. (Give your answer correct to 4 decimal places.) 
Calculus
If the function f is defined by f(x)=0 if x is rational f(x)=1 if x is irrational prove that lim x>0 f(x) does not exist. Can someone help me answer this question step by step so I would know how to prove a question like this next time? Thank you.