# 1.3 /73.814 In significant digit notation, divid, and the answer to two significant digits. I will be happy to critique your work

71,152 questions, page 520
1. ## meteorolgy

On a clear and calm day, the air temperature at sunrise is 0 °C (32 °F) with a relative humidity of 85%. The air temperature reaches a maximum of 10 °C (50 °F) at 3 p.m. Assuming that no water vapor is added to or removed from the air, predict the

asked by Anonymous on June 15, 2011
2. ## Math

A manufacturer decides to build a half-pipe with a parabolic cross section modelled by the relation y=0.2x^2-1.6x+4.2, where x is the horizontal distance, in metres, from the platform, and y is the height, in metres, above the ground. Complete the square

asked by Anonymous on November 25, 2012
3. ## Physics

A quarterback takes the ball from the line of scrimmage, runs backward for 19.0 yards, then runs sideways parallel to the line of scrimmage for 12.0 yards. At this point, he throws a 43.0-yard forward pass straight down the ﬁeld. What is the magnitude of

asked by Anna on October 22, 2017
4. ## physics

Water falls without splashing at a rate of 0.220 L/s from a height of 2.20 m into a 0.720 kg bucket on a scale. If the bucket is originally empty, what does the scale read 3.20 s after water starts to accumulate in it? The answer is supposed to be in

asked by jessi on March 22, 2009
5. ## Calculus II

Fed loves polynomials with rational coefficients and only such polynomials.Suppose f(x)=square root of x. Find a polynomial P(x) that Fred will adore so that, for any x in the interval [3,5], the difference between P(x) and f(x) is less than .01 Hint: The

asked by Lauren on October 17, 2012
6. ## Chemistry

I've seen the posts on solving this particular equation, and I know the answer is right in front of me. I'm still having trouble understanding why... a 42g piece of ice at 0.0 degrees C is added to a sample of water at 7.8 degrees C. All the ice melts and

asked by Elliott on September 22, 2012
7. ## physics

Calculate the work required to be done to stop a car of 250 kg moving at a speed of 18km/hr? answer is right or not please check Mass =250 kg Velocity = 18kg = 18 x 1000/60 x 60 = 5 m/s KE = ½ mv x v = ½ x 250 x 5 = 125 x 5 = 625 J Therefore the counter

asked by Evangelin Lenin on December 31, 2015
8. ## Trigonometry

A billiard ball is struck by a cue. It travels 100 centimeters before ricocheting off a rail forming a 45 degree angle and traveling another 120 centimeters into a corner pocket. how far is the initial position of the ball from the corner pocket the ball

asked by Hailey Lepire on May 15, 2017
9. ## Chemsitry

When 3.75 g of a nonelectrolyte solute is dissolved in 405 mL of water at 25 °C, the resulting solution exerts an osmotic pressure of 897 torr. What is molarity? I found molarity to be 0.048. What is the number of moles of solute? to find moles, I

asked by Anonymous on March 1, 2013
10. ## Physics

A player strikes a hockey puck giving it a velocity of 47.673 m/s. The puck slides across the ice for 0.175 s after which time its velocity is 46.473 m/s. The acceleration of gravity is 9.8 m/s2 . If the puck strikes the goalie’s pads and stops in a

asked by Chris on January 8, 2011
11. ## Statistics

. Suppose that about 20% of those called will find an excuse (work, poor health, travel out of town, etc.) to avoid jury duty. If 14 people are called for jury duty, what is the probability that all 14 will be available to serve on the jury? Round your

asked by Jacob on June 25, 2010
12. ## Trigonometry

A billiard ball is struck by a cue. it travels 100 centimeters before ricocheting off a rail forming a 45 degree angle and traveling another 120 centimeters into a corner pocket. How far apart is the initial position of the ball from the corner pocket the

asked by Hailey Lepire on May 15, 2017
13. ## math

The total distance the plane flies from Chicago to New York City is 792 miles. The flight is 2 hours and 5 minutes long. The plane flies at about the same speed during the trip.• Round the flight time to the nearest hour. About how far will the plane fly

asked by snoyu on March 16, 2017
14. ## physics

A quarterback takes the ball from the line of scrimmage, runs backward for 18.0 yards, then runs sideways parallel to the line of scrimmage for 16.0 yards. At this point, he throws a 49.0-yard forward pass straight down the field. What is the magnitude of

asked by james on September 16, 2015
15. ## Introduction to Physical Science

A rule of thumb for estimating the distance in kilometers between an observer and a lightning stroke is to divide the number of seconds in the interval between the flash and the sound by 3. Discuss whether or not this rule is correct. I say it is correct

asked by Tyrone on August 22, 2013
16. ## English expression

Look at the sun which is shining brightly in the middle of the sky. A dog is running on the field. There are three trees in this picture. A: When do you see these things? B: In the afternoon. (The partner says.) This is also a simple activity. There are

asked by John on February 12, 2008

I believe I have the correct answer for this one, but just want to make sure. According to theories of French and Raven, Martin Luther King Jr exemplified which style of power in his leadership of the civil rights movement? A. Referent power B. Coercive

asked by Keith on December 15, 2007
18. ## physics

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 µV. The thickness of the probe in the direction of B is 2.00 mm. Find the density of the

asked by Rachel on April 8, 2011
19. ## physics

A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 µV. The thickness of the probe in the direction of B is 2.00 mm. Find the density of the

asked by Rachel on April 8, 2011

Her are the data on \$1000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008, Assume you are thinking about buying these bonds as of January 2009. Answer the following questions. a. Calculate the values of the bonds if your required

asked by Chris on June 7, 2012
21. ## Science Help

Which of the following is not a goal of the clean water act? A. Controlling water pollution from point sources B. Encouraging voluntary cooperation by citizens related to nonpoint sources of pollution. C. Educating citizens about the importance of reducing

asked by callie on November 21, 2014
22. ## Physics

Imagine that if you drop an apple from a certain height, its final speed is 20 m/s when it reaches the ground. If you throw the apple vertically downward from the same height with an initial speed of 20 m/s, what will be its final speed? I tried

23. ## Language Arts

Write a short essay in which you examine the figurative language in “Concrete Mixers.” Explain what the concrete mixers are compared to, what the parts of the mixers are compared to, and what the drivers of the mixers are compared to. Then, show how

asked by <3 on April 6, 2016
24. ## Physics

A ball is projected horizontally from the edge of a table that is 0.465 m high, and it strikes the floor at a point 1.04 m from the base of the table. gravity is 9.8 m/s the initial speed of the ball is 3.376042 m/s ~How high is the ball above the floor

asked by Anonymous on November 3, 2015
25. ## Physics

35 of copper pellets are removed from a 300 oven and immediately dropped into 120 of water at 20 in an insulated cup.What will the new water temperature be? I'm stuck on this problem and could use some help. I used q pellets = m · Cp · ΔT and q water =

asked by Liz on April 5, 2011
26. ## Meteorology

On a clear and calm day, the air temperature at sunrise is 5 °C (41 °F) with a relative humidity of 90%. The air temperature reaches a maximum of 15 °C (59 °F) at 3 p.m. Assuming that no water vapor is added to or removed from the air, predict the

asked by Anonymous on March 17, 2016
27. ## Algebra 2 A Conic Section

Franco is adjusting a satellite because he finds it is not focusing the incoming radio waves perfectly. The shape of his satellite can be modeled by y^2+6y-3x+3=0, where x and y are modeled in inches. He realizes that the static is a result of the feed

asked by Nino on April 12, 2015
28. ## physic

A circus performer stands on a platform and throws an apple from a height of 49 m above the ground with an initial velocity v0 as shown in the figure below. A second, blindfolded performer must catch the apple. If v0 = 30 m/s, how far from the end of the

asked by joy on January 30, 2018
29. ## math

Given: f(closure(A)) subset of closure(f(A)) Prove: For any closed set A in Y, f^-1(A) is closed in X (AKA f is continuous) X and Y are metric spaces f: X -> Y f^-1 is f inverse. closure(A) = A U limit points of A The first line is Let C be a closed subset

asked by gemma on April 14, 2013
30. ## math

ennifer runs a restaurant that offers a children's menu. This past week, 24 children ate at her restaurant, and 8 of them ordered macaroni and cheese. What is the experimental probability that the next child to eat in Jennifer's restaurant will order

asked by Anonymous on March 7, 2016
31. ## English

I have to write a 300-500 word essay answering the following questions What benefits do you expect to achieve from career exploration? What do you expect to be the most challenging parts of your career planning process? Why? What questions do you hope to

asked by Learner on November 23, 2015
32. ## P.E

Dominique is helping her friend Kaley learn to do a handstand on the gymnastics mat. To help her friend master this skill, Dominique helps her maintain her balance. Over Kaley’s base of support, Dominique needs to guide her A.Center of gravity B.fulcrum

asked by Eugene on January 8, 2014
33. ## Finance

Calculate, to the nearest cent, the future value FV of an investment of \$10,000 at the stated interest rate after the stated amount of time. HINT [See Example 1.] 5% per year, compounded daily (assume 365 days/year), after 11 years

asked by Amber on February 24, 2015
34. ## Physics

A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the

asked by Colby on November 19, 2012
35. ## Physics

A plane drops a hamper of medical supplies from a height of 2960m during a practice run over the ocean. The planes horizontal velocity was 108m/s at the instant the hamper was dropped. What is the magnitude of the overall velocity at the hamper at the

asked by Laney on November 19, 2012
36. ## math

The total price of a mobile and a watch is rs8000. If 10% discount and 10% VAT IS imposed on both, their selling price becomes rs7920, find the marked price of mobile and watch separately. Well I did this question and every time I get to a point where the

asked by A GOODSTUDENT on August 31, 2016
37. ## STATISTICS

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its

asked by LT on October 30, 2007
38. ## English

I hope you could answer some of my questions this time Can you say: I use the Internet to do my homework researches or is it better to say for doing my homework research/for homowork research? After a little period OR after a short time OR after a while

asked by Franco on December 30, 2009
39. ## Chemistry - Answer Check

Gaseous hydrogen and iodine are placed in a closed container at 425 degrees Celsius. The reactants react to produce the gaseous compound hydrogen iodide, which partially decomposes back into hydrogen and iodine gas as shown below. H2 (g) + I2 (g) 2HI (g)

asked by Anonymous on May 17, 2016
40. ## Physics

A race car starts from rest on a circular track of radius 500 m. The car's speed increases at the constant rate of 0.520 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following. a)speed of the

asked by Karrine on October 18, 2012
41. ## Elementary Statistics help

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its

asked by LT on October 29, 2007
42. ## Literature

Can someone please check if my answer is correct? 1.Which of the following statements best describes how General Zaroff [from the short story 'The Most Dangerous Game' by Richard Conell]justifies his hunting of human beings? a. Animal life is more valuable

asked by mysterychicken on August 29, 2009
43. ## english

A good writer makes events in a story occur plausibly. The action should be consistent with the characters; if the author forces them into uncharacteristic behavior in order to advance the plot, the story will seem artificial. In "Thank You, M'am, " by

asked by crystal on August 6, 2010
44. ## chem11

Suppose you have a large supply of sponge balls with weights in the centre, so that when the balls are piled on each other the bottom ones are flattened. Sketch a graph that generally describes mass vs. volume for these sponge balls. Also, would weighted

asked by girl on February 22, 2012
45. ## Physics

A 0.340 kg particle moves in an xy plane according to x(t) = -15.00 + 2.00t - 4.00t3 and yet) = 25.00 + 7.00t - 9.00t2, with x and y in meters and t in seconds. At t = 0.700 s, what are (a) the magnitude and (b) the angle (relative to the positive

46. ## Check - History.

Is this a good answer? Ethnic groups are similar because many are of the same ethnicity. According to a teacher/tutor, "Canada prides itself on being like a stew with each ethnic group contributing separate and identifiable cultures. The U.S. likes to

asked by Random Girl on February 6, 2018
47. ## English

A good writer makes events in a story occur plausibly. The action should be consistent with the characters; if the author forces them into uncharacteristic behavior in order to advance the plot, the story will seem artificial. In "Thank You, M'am, " by

asked by Dylan on November 9, 2011
48. ## Physics

A pair of constant forces of magnitude F = 11.1 N is applied to opposite sides of the axle of a top, as shown in the figure. The diameter of the axle is d = 8.67 mm. The angle è, which has a value of 36.1°, describes the steepness of the top's sloping

asked by Physics on December 10, 2013
49. ## Physics

The innerspring mattress on your grand- mother’s bed is held up by 23 vertical springs, each having a spring constant of 6000 N/m. A 43 kg person jumps from a 1.93 m platform onto the innersprings. The acceleration of gravity is 9.8 m/s2 . Assume: The

asked by Katie on December 16, 2013
50. ## geography

1. Which country is the smallest in land area in Central America? largest? El Salvador has the smallest area. Mexico has the largest area. 2. What do Finland, Poland, Czechoslovakia, Hungary and Romania all have in common? The countries are all in Europe.

asked by Reed on November 27, 2011
51. ## Grammar

1.Which of the following sentences have (unreduced) compound clauses? Briefly explain your answer. a.I like cities with parks and public sculptures. b.Everyday he either burns the toast or overcooks the eggs. c.Neither does he drink nor does he swear.

asked by Nora on April 7, 2009
52. ## algebra

im trying to help my son i have no ida about this stuff any help would be great When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v”

asked by joni on January 12, 2010
53. ## Algebra

Sorry, it didn't paste the first time, I was wondering if I got these correct; especially number 2 at the bottom. 1. Suppose that a market research company finds that at a price of p = \$20, they would sell x = 42 tiles each month. If they lower the price

asked by Ashli on June 5, 2008
54. ## Language Arts

Imagine the plot of the story in which two characters are lost in the mountain's as darkness falls. Which of the following events would intensify the suspense in this story. A. The characters hear a bird singing in the distance. B. One of the characters

asked by beau on September 16, 2014
55. ## Math

Dvd cases are 9/16 inch wide . A. If Juan has 60 DVD how many of them will fit on one shelf? How wide would a DVD case have to be in order for 60 of them to fit on one shelf? Give the answer in feet

asked by Hassan on September 26, 2016
56. ## Calculus - Hooke's Law , Spring Constant

Hi could someone please help me answer this question: It requires 0.05 joule of work to stretch a spring from a length of 8 cm to 9 cm and another 0.10 joule to stretch it from 9 cm to 10 cm. Determine the spring constant and find the natural length of the

asked by janet on September 15, 2008
57. ## Math

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours? A. About 25% B. About 50% C. About 75% D. About 68% Answer B

asked by angela on May 4, 2016
58. ## Maths

Using the exact trigonometric ratios of 45 degree,30 degree and 60 degree,evaluate the following,leaving where necessary your answer in surd form. (a) 3 sin 30 degree-2 cos 60 degree (b)(tan 45 degree)(4 cos 60 degree-2 cos 60 degree)

asked by Shane on April 5, 2013
59. ## Chemistry

Which is the electrophilic site in the molecule (CH3)2C=O? A. CH3 carbon B. CH3 hydrogen C. C=O carbon D. C=O oxygen I think the answer is D. because oxygen is electronegative and wants electrons thus making it electrophilic. Is this correct?

asked by Anonymous on October 11, 2016
60. ## math

Sean bought 8 slurpees at \$1.50 each and 6 Popsicles. He gave the cashier \$25.00 and received \$4.00 change. How much did each Popsicle cost? my answer: each slurpees for \$1.50 the total will be = 8x \$1.50= \$12 for all slurpees. so, \$25-12= 13 13-4 (the

asked by bandar on September 4, 2015
61. ## Pre-cal

What is the probability of getting an even number on a single roll of a number cube if you roll a 3 or greater. My answer: is 1/3 because there are only two numbers that are even and greater than 3 on the number cube. Teacher marked this as wrong. How did

asked by Lucy on January 3, 2009
62. ## Calculus 2 - springs

Hi could someone please help me answer this question: It requires 0.05 joule of work to stretch a spring from a length of 8 cm to 9 cm and another 0.10 joule to stretch it from 9 cm to 10 cm. Determine the spring constant and find the natural length of the

asked by janet on September 15, 2008
63. ## Math ---HELP!!!!!

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours? A. About 25% B. About 50% C. About 75% D. About 68% Answer B

asked by angela on May 5, 2016
64. ## Geometry

The equation (x + 5) + (y + 3) = 169 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals. ???? Would the answer be (5,3) is the center and 13 is the range of signals..??

asked by Alexa on October 2, 2015
65. ## Physics

A 5.2 kg bucket of water is raised from a well by a rope. The acceleration of gravity is 9.81 m/s^2.If the upward acceleration of the bucket is 4.0 m/s^2, find the force exerted by the rope on the bucket of water. Answer in units of N.

asked by Kenneth on January 7, 2016
66. ## Geometry

Consider the following figure. A number line with point A at negative 2, point B at negative 1, point C at 1, point D at 3, point F at 4.5, and point G at 6. Find AD, CG, and BD. Enter your answer as three numbers. Separate the numbers by commas, like

asked by Sergio on March 6, 2019
67. ## juvenile justice

What are the major differences between the contemporary criminal (adult) justice system and the juvenile justice system? Are the major differences appropriate, given the differences between adults and children? Explain your answer.

asked by susan on February 12, 2009
68. ## math

Sean bought 8 slurpees at \$1.50 each and 6 Popsicles. He gave the cashier \$25.00 and received \$4.00 change. How much did each Popsicle cost? my answer: each slurpees for \$1.50 the total will be = 8x \$1.50= \$12 for all slurpees. so, \$25-12= 13 13-4 (the

asked by bandar on September 3, 2015
69. ## Science

Which chemical equation shows that no atoms are lost during a chemical reaction? A. 8Fe+s8-->Fe5 B. 8Fe+8S8--> 8FeS C. Fe+8S8--->FeS D. 8Fe+S8--->8FeS Is the answer A?

asked by Kelly on April 16, 2015
70. ## math

1. The x-intercept of a line is -3. The y-intercept of a line is 6. What is the slope of the line? 2. What is the equation in slope-intercept form of the line described in Exercise 1? can you please explain and answer it?? im having lots of trouble with

asked by xxx on May 3, 2009
71. ## MATH

if line segment AC =120ft and the ratio of line AB:line BC=3:5, what is the length of line AB ? I set up the equation as x:120,3:5 x/120=3/5 3/120=360, 360 divided by 5=72 the answer in the book is 45, need help

asked by Rose on October 27, 2008
72. ## Math

I need help to set the equation up to solve a system to ensure that I get the answer of (-2, 4)? I also need tosolve two problems in the quadratic equation method, the two problems are x to the second power - 2x - 13 = 0 then the other is x to the second

asked by Dona on April 29, 2013

____ kg = 440 g ((Help Please)) ____ kg 1,006,000 ((Help Please)) 8.6 kg = ____ g ((8600/0.0086??)) 800 g = ____ mg ((800.000??)) 1.7 kg = ____ ((1700/0.0017??)) ____ mg = 6.2 kg ((Help please)) (((((I understand it it's just I can't get a correct answer

asked by Cheyenne on September 16, 2009
74. ## MATH

Am I correct? A suit that normally sells for \$300 is on sale for \$225. By what percent has the price of the suit been lowered? 300-225=75, 75 x 100=7500, 7500/300=25 Answer 25%

asked by Amie on March 20, 2016
75. ## to Ms. Sue

thank you for answering the question. My answer is that the Assyrian Empire is closer in location to the kingdom of Israel than the Kingdom of Judah that makes Kingdom of Israel vulnerable to Assyrian Empire. is this right? thank you.

asked by rx on September 28, 2009
76. ## Physics

Part A of this question asks for the sum of vector A = 3x+5y and vector B = 1x-3y. I did this and got the vector A + vector B = 4x+2y. Part B then asks what the magnitude and direction of vector A + vector B? The answer in the back of the textbook says

asked by Kendall on September 22, 2015
77. ## geography

Can you check my answer please? 1. To what hemispheres do the following countries belong? Soviet Union: Northern and Eastern Hemispheres, Canada: Northern and Western Hemispheres, China: Northern and Eastern Hemispheres.

asked by Reed on October 29, 2012
78. ## physics

A 68 g ice cube at −23◦C is dropped into a container of water at 0◦ C. How much water freezes onto the ice? The specific heat of ice is 0.5 cal/g ·◦ C and its heat of fusion of is 80 cal/g. Answer in units of g.

asked by Reese on April 4, 2019
79. ## math

Adelyn and Hudson each have a canvas that is the same size. Adelyn paints 3 8 of her canvas. Hudson paints 5 8 of his canvas. Who painted a fraction that is closer to 0 than to 1? Use the drop-down menu to show your answer

asked by Yeremiyah on April 14, 2019
80. ## physics

A 3.3 kg ball strikes a wall with a velocity of 8.4 m/s to the left. The ball bounces oﬀ with a velocity of 6.8 m/s to the right. If the ball is in contact with the wall for 0.27 s, what is the constant force exerted on the ball by the wall? Answer in

asked by michael on February 23, 2014
81. ## Math

I'm having trouble understanding equivalent fractions. I'm getting frustated with myself, I feel so stupid for not understanding it. Here's the 2 questions I have to answer: 1. Find a number for x in 18/27 = x/3 so that the fractions are equivalent. 2.

asked by Robin on November 5, 2007
82. ## Pre-Algebra

A 5-foot parking meter has a 4-foot shadow from a nearby streetlight. The streetlight is 15 feet tall. How far is the streetlight from the parking meter? Don't want answer, just want formula for figuring out

asked by Lorri on February 15, 2015
83. ## 8 th grade math

each side of square is 6 in. long . a scale factor of 2/3 is used to draw a similar square. how long is each side of similar square . choices are 4in. ,6 in., 8in. ,answer not here i chose 8 in. is that right

asked by Anonymous on May 14, 2012
84. ## chem

The total pressure in a flask containing air and ethanol at 257C is 800 mm Hg. If the pressure of the air in the flask is 762 mm Hg, the vapor pressure of ethanol is? I tried doing a relationship of P1 over t1 etc but i don't get the right answer.

asked by Anonymous on April 28, 2008

A matte of uniform width is to be placed around a painting so that the area of the matted surface is equal to the area of the painting. If the dimensions of the painting are 15 cm and 10 cm, find the width of the matte. The answer is supposed to be 2.5 cm

asked by Isabelle on November 5, 2014
86. ## English-Ms. Sue

What is the purpose of this essay? How can you tell? - Second part how can I tell? - I can tell by, well this essay talks only about puns, there are a variety of different types of puns in here. Ms. Sue I want to take the well out of my answer, but if I do

asked by Sara on February 1, 2010
87. ## math

The volume of ice-cream in the cone is half the volume of the cone. The cone has a 3 cm radius and height of 14 cm. What is the depth of the ice-cream, correct to 2 decimal places? Answer = 11.11

asked by anonymous on February 22, 2018
88. ## MATH

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.2 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 8 cm? (Note the answer is a positive number). Rate =? d ?

asked by Jia on March 6, 2007
89. ## algebra

Find the slope of any line perpendicular to the line through the points (0,5) and (-3,-4) Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (-1,3) and (4,-2)

asked by anonymous on December 8, 2007
90. ## Math integrals

What is the indefinite integral of ∫ [sin (π/x)]/ x^2] dx ? This is what I did: Let u = π/x (to get the derivative and du:) π*1/x π(-1/x^2)dx = du π(1/x^2)dx = (-1)du so, 1/x^2 = -1/πdu then ∫ [sin (π/x)]/ x^2] dx = ∫ sin(u) (-1/π)du = -1/π

asked by Marissa on August 15, 2008
91. ## Riddle

There is one pond in which one lotus gets doubled everyday. In 20 days pond is half filled. so how many days it will take to get full completely? Thx the answer is 21?? yes. Double of half-full is full.

asked by Veronica on June 4, 2007
92. ## chemistry

consider the balanced chemical equation 2H2O2 ---> 2H2) + )O2 A) given 20.0 g of H2O2 how many grams of water will be produced? B) how many grams of H2O2 will you need to get 20.0 g of water ? C) how many grams of H2O2 will you need to get 20.0 g of O2 D)

asked by Sofia on July 19, 2018
93. ## math HELP FAST PLEASE

bella baked 6 dozen cookies. she wants to keep 1 dozen and give the rest to 20 friends. she wants to give an equal number of cookies to each friend. how many cookies does each friend get? justify your answer.

asked by Anon on November 9, 2011
94. ## Trig

Solve in terms of sine and cosine: sec(x) csc(x)- sec(x) sin(x) so far I have: 1/cos(x) 1/sin(x) - 1/cos(x) sin(x) I am not sure where to go to from there. The book says the answer is cot(x) or cos(x)/sin(x) Thank you in advance.

asked by Dennis on April 9, 2008
95. ## Algebra

A pawn shop is selling gold for \$12.00 an ounce and platinum for \$9.00 an ounce. How much of each should be used to make a gold-platinum mixture of x pounds selling for \$y an ounce? Please explain to do the problem with an answer. :)

asked by ja17 on January 22, 2013
96. ## physics

A 27 g ice cube at −25◦C is dropped into a container of water at 0◦C. How much water freezes onto the ice? The specific heat of ice is 0.5 cal/g · ◦ C and its heat of fusion of is 80 cal/g. Answer in units of g.

asked by Ion on February 9, 2015
97. ## Math

Rita's baby brother weighed 7 5/16 pounds when he was born. Since then, her brother has gained 3 3/4 pounds. How much does Rita's baby brother weigh now? Express your answer as a fraction and as a decimal.

asked by Amy on March 7, 2017
98. ## Math

Lucas says that since 40x70 and 60x50 both have factors with a total of two zeros, they will both have products with a total of two zeros. Is this correct? Explain. 40x70=2800 and 60x50=3000. They both have zeros in the answer. Right

asked by Amari on October 2, 2014