# Questions Asked onNovember 30, 2014

1. ## Chemistry

Calculate the standard entropy, ΔS°rxn, of the following reaction at 25.0 °C using the data in this table. The standard enthalpy of the reaction, ΔH°rxn, is –44.2 kJ·mol–1. C2H4(G)+H20 ---> C5H5OH ΔS°rxn= ______ J*K^-1*mol^-1 Then, calculate

asked by Patrick Panasko
2. ## math

The ratio of cups of water to cups of milk in a recipe is 1 to 3. Write three ratios equivalent to the ratio?

asked by jordon
3. ## SIXTH GRADE MATH

The ratio of wins to losses for a basketball team is 2:3. Which of the following is a possible total number of games? A. 7 games B. 14 games C. 25 games D. 26 games Can someone show me how to solve this problem please?

asked by Stephon
4. ## Math Stats

The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. 52, 30, 44, 35, 47, 37, 56, 26, 35, 35, 52, 52 __________________________________________________________________________ Construct a 95%

asked by STATS 4
5. ## Chemistry (Titrations)

In order to standardize a KMnO4 solution, 0.2848 g Fe(NH4)2(SO4)2·6H2O was dissolved in 25 mL 0.18 M H2SO4. The KMnO4 solution was added to the Fe(NH4)2(SO4)2·6H2O solution until a pale pink color persisted. The titration took 24.2 mL of KMnO4 solution.

asked by Bill
6. ## Math PLEASE HELP ME

A man has \$210,000 invested in three properties. One earns 12%, one 10% and one 8%. His annual income from the properties is \$20,100 and the amount invested at 8% is twice that invested at 12%. How much is invested in each property? at 12% 10% and 8% What

asked by James
7. ## Solid Mensuration

A circle having an area of 452 square inches is cut into two segments by a chord, which is 6 inches from the center of the circle. Find the area of the bigger segment.

asked by Sol
8. ## math

Tina says that 6:8 is equivalent to 36:64. What did Tina do wrong?

asked by eugene
9. ## Math

Which of the expressions is not equivalent to 1/25? A. 5^3×5^-5 B. 5^-1×5^-1 C. 5^-3×5 D. 5^-2×5^4

asked by Anon
10. ## English (Reunion by John Cheever)

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does

asked by Aly
11. ## Calculus,Reaction rates

A man walks across a bridge at the rate of 5 ft/s as a boat passes directly beneath him at 10 ft/s. If the bridge is 10 ft above the boat, how fast are the man and the boat separating 1 second later?

asked by ray
12. ## Statistics

A popular resort hotel has 300 rooms and is usually fully booked. About 4% of the time a reservation is cancelled before 6:00 PM deadline with no penalty. What is the probability that at least 280 rooms will be occupied? Use binomial distribution to find

asked by Richa
13. ## Physics

The surface area of an adult human is about 1.8m2 . Suppose a person with a skin temperature of 34 ∘C is standing nude in a room where the air is 25∘C but the walls are 17 ∘C. A) There is a "dead-air" layer next to your skin that acts as insulation.

asked by Drew
14. ## AP Calculus

Find all points on the graph of f(x)=-x^3+3x^2-2 where there is a horizontal tangent line.

asked by Sarah
15. ## Chemistry

Consider the reaction for the production of NO2 from NO: 2 NO(g) + O2(g) = 2 NO2(g) a)If 84.8L of O2(g), measured at 35 degrees Celsius and 632mm Hg, is allowed to react with 158.2g of NO, find the limiting reagent. b) If 97.3L of NO2 forms, measured at 35

asked by Kirsty
16. ## STATS MATH 1

A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1065 people age 15 or older, the mean amount of time spent eating or drinking per day is 1.62 hours with a standard deviation of

asked by LADO
17. ## Algebra

A confectioner sells two types of nut mixtures. The standard-mixture package contains 100 g of cashews and 200 g of peanuts and sells for \$1.85. The deluxe-mixture package contains 150 g of cashews and 50 g of peanuts and sells for \$2.45. The confectioner

asked by Jessica
18. ## science

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

asked by Jason
19. ## physics

Two boys stand on the surface of a frozen lake where μs = 0.15 and μk = 0.10. The 30.0 kg boy shoves the 40.0 kg boy with a horizontal force of 50.0 N, 0.0°. Find the resulting acceleration of each boy.

asked by Mush
20. ## MATH

The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:

asked by LADO
21. ## Physics

The acceleration of gravity is 9.8 m/s^2 . What is the magnitude of the total force on a(n) 72 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 61 m/s in 7.8 s? Answer in units of kN

asked by Jackie
22. ## Differential equations in Calculus...plsssss help?

Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0)

asked by Bridget
23. ## Algebra word problem

Mary is two years older than Robert. The sum of their ages is 28. Write an expression for each person, write the equation for the situation and find out how old each person is.

asked by Lee Ann
24. ## math

Sinea and Ren are going to the carnival next \$8, souvenirs - \$20 Sinea wants to spend money using the same ratios as on her last trip to the carnival. If she spends \$26 on games, how much will she spend on souvenirs? Ren wants to spend money using the same

asked by jordon
25. ## Please answer

An agricultural researcher is interested in estimating the mean length of the growing season in a region. Treating the last 10 years as a simple random sample, he obtains the following data, which represent the number of days of the growing season. 153 164

asked by STATS 2
26. ## physics

a force of 10n cause a spring to extened by 20 mm find? the extension of the spring when 25n is applied

asked by mubarak
27. ## Math please help!

A glass of skim milk supplies 0.1 mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4 mg of iron, 22 g of protein, and 20 g of carbohydrates. Two slices of whole-grain bread supply 2.2 mg of iron, 10 g of

asked by Steve
28. ## statistics

A simple random sample of students is selected, and the students are asked how much time they spent preparing for a test. The times (in hours) are as follows: 1.3 7.2 4.2 12.5 6.6 2.5 5.5 Based on these results, a confidence interval for the population

asked by Brian
29. ## Chemistry

I need chemistry help. I think 1. c, 2.b, & 3.a (please tell me why or why not and help me set up the problems if possible) 1.) The following half reaction has been balanced except for the electrons. How many and where should the electrons be included? 14

asked by Tyler
30. ## Gowng

The speen of a bullet of mass 20g in 216km/s what is kinetic energy

asked by Shedrack
31. ## Calculus,reaction rates

A car starting at 12:00 noon travels west at a speed of 30 kph. Another car starting from the same point at 2:00 PM travels north at 45 kph. Find how fast the two are separating at 4:00 PM?

asked by @jayr
32. ## Solid Mensuration

The area of a regular hexagon inscribed in a circle is equal to 166.28 square cm. If the circle is inscribed in a square, find the difference between the area of the square and the hexagon.

asked by Sol
33. ## maths

April has 3 pounds of trail mix. She puts equal of amounts in each of 8 bags. How much trail mix is in each bag?

asked by ann
34. ## English

1. If it rains tomorrow, I will not start. 2. If it should rain tomorrow, I will not start. 3. If it rained tomorrow, I would not start. 4. If it rained yesterday, he didn't go to work. ------------ Are they all grammatical? Which ones are not grammatical?

asked by rfvv
35. ## math

Sean has 8-inch pieces of toy train track and Ruth has 18-inches of train track. How many of each piece would each child need to build tracks that are equal in length?

asked by Anonymous
36. ## Social studies

-Athens does not live up to Pericles ideal democracy because Athenians use of ostracism contradicts Pericles statement that all have equal participation - Athens somewhat lives up to Pericles ideal democracy because it only allowed native born, male

asked by Nicole
37. ## Physics

A child of mass m is playing on a merry-go-round which has mass 6m and radius r. Assume the merry-go-round is a uniform disk. The child is standing on the edge of the merry-go-round, which is spinning with an angular speed ω1. a) What is the moment of

asked by Alex
38. ## art

why would an artist chose to use harmony in a piece of artwork?

asked by elizabeth
39. ## statistics

An air gap exists between fluids in a bottle and the cap of the bottle. At a firm producing olive oil, the gap is critical to the shelf life of their product. If the recent information reveals that the average gap is 9.46 mm with a standard deviation of

asked by Deeptimaan
40. ## check my science hw please.

25. All of the following factors affect an area's biodiversity EXCEPT A. areas B.number of endangered species C. climate D. diversity of niches. I got C for my answer.

asked by Sam
41. ## physics

Atoms in a solid are not stationary, but vibrate about their equilibrium positions. Typically, the frequency of vibration is about f = 4.55 x 1012 Hz, and the amplitude is about 2.69 x 10-11 m. For a typical atom, what is its (a) maximum speed and (b)

asked by Nick
42. ## physics

a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the

asked by jhon
43. ## Calculus (Cross Section) again

A half of a pepperoni stick is 10 cm long. Assume that a cross section perpendicular to the axis of the pepperoni at a distance x from the end if a circle of radius rad(3x). What is the volume of the pepperoni

asked by Trinh
44. ## English (Urgent)

In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does

asked by Aly
45. ## Math

In a math contest of 10 problems, 5 points was given for each correct answer and 2 points was deducted for each incorrect answer. If Nancy did all 10 problems ad scored 29 points, how many correct answers did she have?

asked by M
46. ## algebra

You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the

asked by darlene
47. ## Calculus

Find the derivative of x^2f(x) A. x[xf'(x)+2f(x)] B. 2xf'(x) C. x[xf'(x) +2f'(x)] D. x^2f'(x) E. None of these

asked by Anonymous
48. ## math

Kendra has a painting canvas that is 27 inches wide by 33 inches high. She painted a red rose, which covered 40% of the canvas. What was the area of the canvas which was covered by the red rose?

asked by jamie
49. ## chemistry

If you place 10.0 L of propanol (C3H8O) in a sealed room that is 3 m long, 2.75 m wide, and 2.5 m high, will all the propanol evaporate? If some liquid remains, how much will there be? The vapor pressure of propanol is 10.7 torr at 25 °C, and the density

asked by chris
50. ## Calculus

Find an equation of the tangent line to the graph of x^2+3y^2=4 at the point (1,1) A. y+1=-1/3(x+1) B. y-1=-x/3y(x-1) C. x+3y=2 D. y-1=-1/3(x-1) E. None of these

asked by Anonymous
51. ## SIXTH GRADE MATH

The ratio of boys to girls at a day care cent is 5 to 4. Which of the following cannot be the total number of children at the center? A. 27 children B. 54 children C. 60 children D. 72 children Is the answer 60. The reason I chose 60 children is because

asked by Stephon
52. ## AB Calculus

I figured out that part "A" is -3/8, but i can't figure out part 2, a or b. please explain and help. thanks. Sand is falling from a rectangular box container whose base measures 40 inches by 20 inches at a constant rate of 300 cubic inches per minute. a)

asked by Jake
53. ## chemical equations

How do I write the chemical equation for Copper(II)nitrate + sodium hydroxide -> Copper(II)hydroxide + sodium nitrate? CuNO3 + NaOH-> CuOH + Na(NO3) is that right? Copper(II)hydroxide -> Copper(II)oxide + water CuOH -> CuO + H2O?

asked by Anonymous
54. ## Physics

A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 5.20-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum

asked by Ana
55. ## check my science hw please.

18. Which of the following would be a cost of drilling for oil in Antarctica? A. The supply of heating fuel would be increased. B.There would be a greater opportunity to study wildlife there. C. An oil spill could harm food sources for penguins. D. Many

asked by Sam
56. ## Calculus (cross section)

A solid has a base bounded by x^2_y^2=36. Find the volume of the solid if every plane section perpendicular to the diameter is an isosceles triangle whose base is on the circle and whose height is 4 units

asked by Trinh
57. ## @Vanessa: Re: Comm/215

I deleted your original questions and answers. Here are my responses. Comm/215 - Ms. Sue, Sunday, November 30, 2014 at 4:45pm I've checked the first 10 and they are all right. Is # 11 a comma splice? If I have time, I'll come back and check more of your

asked by Ms. Sue
58. ## Math Stats

The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:

asked by STATS 3
59. ## English

similarities and differences between lady macbeth and juliet

asked by Rais
60. ## chemistry-chemical equations

How do I write the balanced chemical equation for Copper +nitric acid -> copper(II)nitrate+ nitrogen dioxide + water

asked by Anonymous
61. ## check my science hw please.

26. In the last few centuries, the number of species becoming extinct on Earth has A.decreased dramatically B. decreased slightly. C. increased slightly. D.increased dramatically I think it should be C.

asked by Sam
62. ## math

the ratio of boys to girls on the bus is 20/15. what are three ratio equivalents.

asked by jordon
63. ## English

Comparisons between Lady Macbeth and Juliet + some quotes to explain the comparisons

asked by Hifza
64. ## MATH

The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:

asked by LADO
65. ## Sixth Grade Math

A car driving cross-country traveled 180 miles in 4 hours. At this rate of speed, how many miles further will the car travel in the next 3 hours? My answer is 135 miles. Is my answer correct?

asked by Stephon
66. ## Physical Education

What traditions have grown around baseball?

asked by Just Wondering
67. ## Calculus with Diffrential Equations: Pleease help?

Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0)

asked by Bridget
68. ## physics

A 35kg lawnmower starts from rest. Its pushed with a force of 127N at an angle 40 degrees below horizontal. After 12s it reaches speed of 0.37m/s. Find acceleration and force of friction. Attempts: Well I figured out Fnormal=343 my multiplying mass by

asked by jamie
69. ## chem 200

669 cal of heat is added to 5.00 g ice at –20.0 °C. What is the final temperature of the water?

asked by k
70. ## CHEM

1.) What is the correct net cell reaction for the electrochemical cell diagramed below? Ni(s) ∣ Ni2+(aq) || Ag+(aq) ∣ Ag(s) a.) Ag+(aq) + Ni(s) ---> Ag(s) + Ni2+(aq) b.) Ag(s) + Ni2+(aq) ---> Ag+(aq) + Ni(s) c.) 2Ag+(aq) + Ni(s) ---> 2 Ag(s) + Ni2+(aq)

asked by Amber
71. ## business

New Orleans’s Mt. Sinai Hospital is a large, private, 600-bed facility complete with laboratories, operating rooms, and X-ray equipment. In seeking to increase revenues, Mt.Sinai’s administration has decided to make a 90-bedadditiononaportionofadjacent

asked by business
72. ## Algebra

A woman wishes to invest \$12,500 in three types of bonds: municipal bonds paying 8% interest per year, bank investment certificates paying 9%, and high-risk bonds paying 12%. For tax reasons she wants the amount invested in municipal bonds to be at least

asked by Jessica
73. ## trig

Two circles of radii 5 and 3 cm, respectively, intersect at two points. At either point of intersection, the tangent lines to the circles form a 60◦ angle, as in Figure 2.2.4 above. Find the distance between the centers of the circles

asked by Anonymous
74. ## math

the ratio of girls to boys in the chorus is 3:2. If there are 50 students in chorus, how many boys are there and how many girls?

asked by terry
75. ## Help with differential eqs problem???? (Calculus)

Consider the differential equation dy/dt=y-t a) Determine whether the following functions are solutions to the given differential equation. y(t) = t + 1 + 2e^t y(t) = t + 1 y(t) = t + 2 b) When you weigh bananas in a scale at the grocery store, the height

asked by Stacey
76. ## check my science hw please.

31. Which of the following is an example of a global environmental choice? A. a student deciding to ride a bicycle to school B. a family deciding to recycle their newspapers C. a town meeting about a new nature refuge. D. nations meeting to discuss the

asked by Sam
77. ## Physics

A 4.26 kg block starts up a 33.0 degree incline at 7.81 m/s. How far will it slide if the coefficient of kinetic friction is 0.23?

asked by Jennifer
78. ## Chemistry

What volume of H2 gas (in liters), measured at 23 °C and 678 torr, can be obtained by reacting 7.59 g of zinc metal with 124 mL of 0.302 M HCl? Zn + 2HCl --> ZnCl2 + H2

asked by KJ
79. ## science

10. One group of gases that is responsible for destroying ozone in the ozone layer is A.car exhaust fumes B.CFCs C.nitrogen oxides and sulfur oxides D. Carbon monoxide and carbon dioxide I got B for my answer.

asked by Sam
80. ## Calculus

Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = -1/15T+5 15T + 5. a) Supposes that T(0)

asked by Bridget
81. ## ps316

There 112 seats there 7 seats in each row and 70 people are seated how many rows are empty

asked by janice
82. ## calculus

The number of U.S. citizens 65 and older from 1990 through 2050 is estimated to be growing at the rate of, R(t)=0.063t^2 -0.48t+3.87, (0 less than or = t less than or = 15) million people/decade, where t is measured in decades and t = 0 corresponds to

asked by mar
83. ## statistics

A company has been studying the performance of their sales department. The measure of performance used is: average monthly sales amount in dollars. For the past 12 months, the average monthly sales amount has been \$4,532 with a standard deviation of \$386.

asked by Deeptimaan
84. ## Spanish Help

Si yo _________ (omitir) algo en esta carta, lo siento. a.omitimos b.omiten c.omito d.omites I know omitir means skip, and I know what the sentence says. I wanted to know if anyone could find me anything helpful when it comes to -IR verbs? I do not get the

asked by Katt<3Bobby
85. ## Chemistry

1. Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may

asked by Mcmaster university
86. ## Chemistry

Bromine has two naturally occurring isotopes, the first of which is 79Br with a mass of 78.904 amu and an abundance of 50.54%. Calculate the mass of the other isotope.

asked by Louise
87. ## Chemistry

To 1.0 ml of 1.5%NaCl, water is added to a final volume of 100ml. What is the molarity NaCl of this final solution? 1.5g/100ml I do not know where to go from here?

asked by Samantha
88. ## Math

ABC *AA Ans: AC6C Find ABC values?

asked by Kamalakshi
89. ## Physical Science

Complete and balance the equation for the following single-replacement reactions. (Use the lowest possible coefficients. Omit states-of-matter from your answer.) Ni + Cu(NO3)2(aq)-->

asked by Darrel
90. ## physics

An unknown mass of a certain solid, initially at 60⁰C, is heated at a uniform at a uniform rate. After 4.0 min the solid reaches its melting point of 80⁰C, and it remains at that temperature for 3.0 min until completely melted. After a further 6.0 min

asked by Alicia
91. ## physics

How much work is required to extend an exercise spring 15cm if the spring constant is 800N/m?

asked by Leah
92. ## physics

A simple harmonic oscillator consists of a block of mass 1.20 kg attached to a spring of spring constant 190 N/m. When t = 1.80 s, the position and velocity of the block are x = 0.124 m and v = 3.190 m/s. (a) What is the amplitude of the oscillations? What

asked by kelly
93. ## Calculus

Find dy/dx for y=sin(x+y) A. 0 B. (cos(x+y))/(1-cos(x+y) C. cos(x+y) D. 1 E. None of these I know I'm supposed to use implicit differentiation but I'm not sure how to go about it with sin

asked by Anonymous
94. ## Physics

A puck (uniform disk) of mass m and radius r is travelingat a speed v on frictionless ice. It strikes a second identical puck a glancing blow (at point P) and sticks to it (using VelcroTM). After the collision, the two-puck-object rotates with angular

asked by Alex
95. ## physics

A river is flowing along the east direction with a velocity of 10km/hr. A person heads towards north with a velocity of 2km/hr. what is the velocity of the person with respect to ground?

asked by shreya
96. ## math

Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if five cards are selected from a set of nine Tarot cards?

asked by libby
97. ## band essay?

I have to write an essay on why I deserve a scholarship for our band class trip to Puerto Rico, I was wondering what English teachers would be looking at/for in this essay and how long it should roughly be

asked by Anonymous
98. ## Chemistry

5.) Which of the following is the strongest oxidizing agent? a.) Zn(s) b.) Mg(s) c.) Al3+(aq) d.) Mg2+(aq)

asked by Anonymous
99. ## English Poetry(response to writeacher)

The theme is the theme is thoughts of elderly? And that there is only one life to live so live it well? This poem seems confusing.. it is either really easy and literal or metaphoric.. I need to write a paper on the atmosphere of this poem and I think the

asked by Bethany
100. ## Chemistry

A) if you added 8g of ammonium nitrate to 25mL of room temperature water, what would be the temperature in °C?

asked by J
101. ## physics

a car is running at 50 mph when the driver starts to step at the breaks. if the car decelerates at the rate of 7 ms^2, how long does it take the car stop?

asked by ynah
102. ## Chemistry

The addition of a crystal of sodium chlorate to a sodium chlorate solution containing no undissolved solute causes additional crystals of sodium chlorate to precipitate. The original solution was supersaturated or unsaturated

asked by Ang
103. ## introductory chemistry essentials

A 3.5 Liter sample of 5.8 M NaCL solution is diluted to 55 Liter. What is the molarity of the new solution?

asked by Anonymous
104. ## physics

When a 1.50 kg block is 3.96 m above the base of the hill, the mass has a speed of 1.71 m/s. When the block reaches a point 0.750 m above the base of the hill, what is its kinetic energy?

asked by Steve
105. ## math

Find the height of a ball after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet.

asked by Anonymous
106. ## physics

Ben uses a parachute, to fall to the ground at a safe, steady speed. Discuss the energy transfers, which allow ben and his parachute, to drop at a steady speed.

asked by olivia
107. ## Math

Carl needs estimate the quotient 547 divideted by 92 explain how Carl could use compatible numbers to make a reasonable estimate

asked by Estimate quotients
108. ## Physics

A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?

asked by Mike
109. ## physics

with what speed does a hammer dropped from a height of 23 m strike the ground?

asked by Leah
110. ## Calc

Find the linearization of f(x)=cos(x)-sin(2x) at x = 0.

asked by Fred
111. ## physics

A dude is spinning a 1.0 kg mass on the end of a 1.5 meter string. He gets it spinning at a constant rate of 4.0 rev/sec. The string breaks such that the mass is thrown into projectile motion with an initial angle of 45° to the ground (assume that it is

asked by hicham
112. ## Physics

A 50 kg cart rests on frictionless surface. A net force of 75 N acts on the carts over a distance of 2m. What maximum speed does the cart reach? Work: I can figure that the acceleration is 1.5m/s/s, Vi= 0. I was thinking maybe if I found time through the

asked by Sam
113. ## PROPORTION - MATHS

In a Map a distance of 50KM between two places A and B represented by 4m. What will be the actual distance between A and C, represented on the map considered as 7cm? 50:4 :: 7:x 50x : 4 X 7 x = 4 X 7 / 50 = 7/12.5 Please varify this question.

asked by niya
114. ## Chemistry

how many grams of ammonium nitrate would you have to add to 25mL of room temperature water to get 36°F?

asked by Jay
115. ## Calculus

For which of these functions f(x) does limit as x approaches negative infinity f(x)=2 A. (x-2)/(3x-5) B. 2x/sqrt(x-2) C. (2x^2-6x+1)/(1+x^2) D. (2x-1)/(x^2+1) E. None of these

asked by Anonymous
116. ## Calculus

Which of the following describes the graph of y=|2x+6|? A. Only continuous B. Only differentiable C. Both A and B D. Not continuous, not differentiable E. Constant

asked by Anon
117. ## marketing

The types of companies compete in the global marketplace: (1) international firms, (2) multinational firms, and (3) transnational firms. All three employ people in different countries, and many have administrative, marketing, and manufacturing operations

asked by nafees
118. ## Math

if f(x) = 2x^2+4 and g(x)=x-3 which number satisfies f(x)= (f o g)(x) A) 3/2 B) 3/4 C) 5 D) 4 I am positive that answer A is correct, i just cant get the work to prove it, i can disprove all other answers and my teacher has assured me i am on the right

asked by Katie
119. ## statistics

A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours aday? b) In a random sample of 10 babies of

asked by adriana
120. ## social studies

in Greek education why is it beneficial to educate all children in a civilization? why is it important to educate the population in a democracy?

asked by Daniela
121. ## chem

A weak acid, HA, has an ionization constant of 9.29 x 10-6. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?

asked by jess
122. ## Trigononometry and plaine sperical

Find the exact values of the six trigonometric functions for each of the following angles.draw the angles in standard position 1.300 degree

asked by Jomar castillo
123. ## physics

A robot arm expends 15J of work to extend a spring 10cm from its equilibrium position. How much force is required?

asked by Leah
124. ## Biology

Genome A 5-GCAGGCCATATAAAATAGCGCCATACTAGATACGGG CCATATTATTGCATATCCGCCGATTACAGGATTTAATTT GGGAATTCCCCGATTAACGCGATCGATCGGGCCATATC GATATGCATCGTAATCCGGTAGATTCACAGGTAG -3 Genome B 5-GCATACCCAAATTAATAACGGCGGTAGGCGACTCATT CTGATATACGCATCGGCATTTACCTACGGCCGGCCGGC

asked by Jessica
125. ## pre-cal

Find the height of a ball after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet.

asked by Anonymous
126. ## Biochem

I did a titiration expriment and I need to work out how much Hcl is in the sample (NaOH). The expriment was testing the rate of ester hydrolysis . I was wondering if the the amount of Hcl present is the same as NaOH added due to the equivalence of the acid

asked by annnnnnnnnnnnnnnnnn
127. ## SIXTH GRADE MATH

The staff of the Westpoint Public Library signed up 6 volunteers in the last 21 days. If the library staff continues to sign up volunteers at this rate, how many new volunteers will they get in the next 7-day week? 2 volunteers is my answer. Is my answer

asked by Stephon
128. ## ApWorld history

How did religion stay the same throughout the spread of islam in west Africa in circa 800 C.E. and circa 1750

asked by Anonymous
129. ## chemistry

A 0.205 g sample of impure NaOH requires 17.5 mL of 0.2180 M HCl for neutralization. What is the percent of NaOH in the sample, by weight?

asked by Kate
130. ## Calculus

Find the derivative: f(x)=1/cubed root(3-x^3) A. -1/3(3-x^3)^4/3 B. x^2/(3-x^3)^4/3 C. -x^2/(3-x^3)^2/3 D. -x^2/(3-x^3)^4/3 E. None of these

asked by Anonymous
131. ## Chemistry

I'm looking for a video of a chemical reaction that can help me answer these questions What are the names of the reactants and products and their states @ room temperature? What type of reaction is it?

asked by Anonymous
132. ## falaq

Assalamualaikum Muslim experts in falaq have produced salat timetables for the convenience of the ummah. a.Naturally they would have certain error margins.If, say for example the error is about 2 minutes. The time for asr is 430 pm. Is it then possible to

asked by nadira
133. ## physics

The acceleration of gravity is 9.8 m/s 2 . What is the magnitude of the total force on a(n) 87 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 41 m/s in 5.3 s? Answer in units of kN

asked by jo
134. ## Calculus

Find limit as x approaches 1 5/(x-1)^2 A. 0 B. Negative infinity C. 5/4 D. Infinity If I use limit as h approaches 0 f(x+h)-f(x)/h , will I get an x in the answer?

asked by Anonymous
135. ## physics

a body moving at 40 m/s accelerates at the rate of 8m/s^2. what is the distance it transverses in 15 seconds?

asked by ynah
136. ## Math

1. If 100 is saved on October 1, 150 on October 2, 200 on October 3, and so on, how much is saved during October? 2. A Ping-Pong ball is dropped from a height of 16 ft and always rebounds 1/4 of the distance of the previous fall. a. What distance does it

asked by Hershey
137. ## math

A prism has a base which is a right triangle with legs, 16mm and 12 mm

asked by sawsdas
138. ## What is the best estimate of the population mean?

The Jolliebee hamburger chain specializes in half-pound hamburgers. The sales follow a normal distribution. The standard deviation of the distribution for daily sakes is \$3000. A sample of 40 showed the mean daily sale to be \$20,000. What is the best

asked by Jennifer
139. ## percentages

a tree is 1.5 m tall after a year it increase its height by 12% after another year it by a further 14% what is the percentage change

asked by anyomonous
140. ## Statistics

A recent study of US children under 11 years old found that they spend on average 142 minutes a day watching tv. Assuming normal distribution with the standard deviation of 44 minutes, answer the following. A) what percent of children of this age spends

asked by Junior
141. ## chemistry

Sodium vapor lamps are used in Chicago to light city streets. The light emitted (given off) by these lamps has a λ of 5.9 x 10-7 m. What is the λ in cm? What is the λ in nanometers (nm) [1 meter = 1 x 109 nm]? What is the ν of this radiation? In what

asked by mathew
142. ## chemistry

chemical reactions type?

asked by jose
143. ## government

. In Griswold v. Connecticut, the Supreme Court was considered an activist court because... I know that it has everything to do with the privacy law. I am stuck between two answer from the multiple choice. please help.

asked by Sunflower
144. ## AP Calculus

Let f(7)=0, f'(7)=14, g(7)=1, g'(7)=1/7. Find h'(7) if h(x)=f(x)/g(x)

asked by Sarah
145. ## Math

1. A town has a population of 100,000 now and the population is increasing 10% every year. What will be the population in 5 years? 2. How many poles will be in a pile of telephone poles if there are 30 in the bottom layer, 29 in the second, and so on,

asked by Hershey
146. ## Math

A town has 4900 registered voters, each of whom is either a Republican, a Democrat or an Independent. In the last primary election, 1150 people voted, and the number of Republicans who voted was 720 fewer than 30% of the total number of Democrats plus

asked by Kyle
147. ## English

1. If he be brave, he will try it again. 2. If he is brave, he will try it again. 3. If it rain tomorrow, I will not start. 4. If it rains tomorrow, I will not start. ------------- Are they all grammcatical?

asked by rfvv
148. ## Math

A game is played by throwing darts at a target. A player can choose to throw two or three darts. Darcy plays two games. In Game 1, he chooses to throw two darts, and wins if he hits the target at least once. In Game 2, he chooses to throw three darts, and

asked by Anonymous
149. ## trigo

a peak is sighted at an angle of 27 degree 45 min. 1000ft nearer its angle of elevation is 31 degree 30 min.find the height of the peak

asked by chel
150. ## English

How to find a keywords of the quote our deepest fear

asked by Anonymous
151. ## physics

a projectile has a maximum range R=150m.find its initial velocity and the corresponding maximum height it reaches. at what angle should it be aimed to hit a target at the same level that is located at a distance x=100m from it?

asked by ali
152. ## chemistry

Determine how many milliliters of 0.310 M HClO4 will be required to neutralize 52.37g Ca(OH)2 according to the reaction: 2HClO4 + Ca(OH)2 ---> Ca(ClO4)2 + 2 H2O

asked by B
153. ## math

Evaluate the expression. 11! 6! 4! 2! 3! 1!

asked by libby
154. ## Calculus

Find the equation of the line that passes through (1,3) and is perpendicular to the line 2x+3y+5=0 A. 3x-2y+3=0 B. 2x+3y-11=0 C. 2x+3y-9=0 D. 3x-2y-7=0 E. None of these I got E?

asked by Anonymous
155. ## Calculus

Find the limit as x approaches 0 [(sqrt(x+9))-3]/x A. 0 B. 1 C. Infinity D. 1/3 E. None of these

asked by Anonymous
156. ## statistics

A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours a day? b) In a random sample of 10 babies of

asked by adriana
157. ## Math

1. If 100 is saved on October 1, 150 on October 2, 200 on October 3, and so on, how much is saved during October? 2. A Ping-Pong ball is dropped from a height of 16 ft and always rebounds 1/4 of the distance of the previous fall. a. What distance does it

asked by Hershey
158. ## CALC 1

Suppose that h is a function with h'(x) = xe^x. Find all intervals where the function h is concave up. Now, I understand that concavity is determined by the second derivative, so what my question here is, is it just taking the first derivative and then

asked by Brian
159. ## Math

A triangular region is bound by the three lines 2x+y-12=0, y=3x-3, and y=1/7x-81/7. What is the circumcentre of this triangle? I can find the answer using a graph, but I don't know the formula to find the mid segments of the lines.

asked by Annabeth
160. ## calc

evaluate the surface integral double integral (y dS) z= 2/3 (x^3/2 + y^3/2) 0 ≤ x ≤ 5, 0 ≤ y ≤ 2

asked by sara
161. ## science

what is pollution

asked by Anonymous
162. ## geometry

Having a very hard time. Can someone please help. Im trying to find how many sides a polygon has if, the difference of the interior and exterior angles is 100 degrees?

asked by Brandi
163. ## Calculus

Find dy/dx if x^2+y^2=2xy A. x/(x-y) B. (y+x)/(y-x) C. 1 D. -x/y E. None of these

asked by Anon
164. ## Algebra

What is the probability of obtaining tails and a sis?

asked by Maxine
165. ## Calculus

If f(x)=sin(2x), find f"(x) A. 2cos(2x) B. -4sin(2x) C. -2sin(2x) D. -4sinx E. None of these Is it B from using chain rules?

asked by Anonymous
166. ## AP calculus

Find values for x and/or y on the graph of x^2-2y^2+9x+8y-276=0 for which there is a vertical tangent line

asked by DJjazzyjazz
167. ## ApWorld history

Would Arabic becoming an important language count as a change to the spread of islam in a ccot essay

asked by Anonymous
168. ## Algebra

(7.8*10 to the 12th power)*800=(7.8*10 to the 10th power)*80,000 Directions:tell whether each equation is true or false. if false, write the inequality in like terms I don't remember how to start multiplying.

asked by Bob
169. ## Calculus

Find f'(x) if f(x)=sin^3(4x) A. 4cos^3(4x) B. 3sin^2(4x)cos(4x) C. cos^3(4x) D. 12sin^2(4x)cos(4x) E. None of these I got D using the chain rule?

asked by Anonymous
170. ## Physics

You may have observed that a car with windows closed sitting under the sun on a hot day, can get extremely hot in the interior, even hotter than the outside air. Explain this in terms of heat and temperature concepts. How is this similar to greenhouse

asked by Hershey
171. ## Religion/ Social Studies/ Science

Please, someone tell me who was it that made the world. Thank you.

asked by sharkeesha
172. ## Calculus

Find limit as x approaches 5 (x^2-3x-10)/(x-5)

asked by Anonymous
173. ## Chemistry Correction

Hi, I'm trying to solve for the radius of the sphere. This is the correct steps: 8.27*10^-29 = 4/3 pi * r^3 r^3 = 2.0225 * 10^-29 cu meters When I do 8.27x10^-29 / 4/3 pi, I don't get the answer 2.0225x10^-29 Can you tell me what I'm doing wrong?

asked by Nancy
174. ## English

1. I heard the news at first hand. 2. I heard the news at second hand. 1-1. I heard the news directly. 2-2. I heard the news indirectly. --------------- Are they interchangeable? What is the meaning of 'hand' in the sentences?

asked by rfvv
175. ## CHEMISTRY HELP

what are the diff b/in: 12. Dilute to and dilute with 13. Warm, boil 14. Heat almost to boiling 15. Heat just to boiling 16. Evaporate to 17. Evaporate to almost dryness 18. Concentrate the volume to 12. I know the meaning of dilute its reducing the

asked by Yeng
176. ## Calculus

If f(x)=x^2+1 and g(x)=2x-1, find d/dx[f'(g(x))] at x=1 A. 2 B. 6 C. 4 D. 0 E. None of these

asked by Anon
177. ## physics

How much heat (in kJ) will it take to bring 56 kg of ice at -8°C to dry steam? Answer to 3 significant figures

asked by Anonymous
178. ## trigonometry

calculate the linear velocity of an object rotating at an angular velocity "w" at distance "r" from the center . express the answer in centimeter per second. 1.r=10cm; w=20πrad/second 2.r=5cm; w=20πrad/second 3.r=12cm; w=25πrad/second 4.r=30cm;

asked by deyanz
179. ## Calculus

Find f'(x) for f(x)=(2x^2+5)^7 A. 7(4x)^6 B. 7(4x)^7 C. 28x(2x^2+5)^7 D. 7(2x^2+5)^6 E. None of these Would it be none of these because of the 4x in the chain rule?

asked by Anonymous
180. ## Calculus

Find limit as x approaches -1 (x^2+2x+3)/(x^2+1) A. 0 B. 1 C. Infinity D. DNE E. None of these

asked by Anonymous
181. ## Calculus

Find the derivative for f(x)=-x^2+x Do I put the -x^2 as a denominator? How would I solve it if that's what I'm supposed to do?

asked by Anonymous
182. ## Calculus

Find the limit as x approaches 1 5/(x-1)^2 I don't understand how to solve it because there would be a 0 on the denominator.

asked by Anonymous
183. ## Calculus

Find limit as x approaches 5 (x^2-3x-10)/(x-5) A. 2 B. DNE C. 0 D. 7 E. None of these

asked by Anonymous
184. ## Calculus

Find an equation of the tangent line to the graph of f(x)=xsinx when x=0. A. y=0 B. f'(x)=0 C. y=xcosx+sinx D. y=x E. None of these

asked by Anonymous
185. ## Geometry

Draw a pentagon shaped courthouse, it must be painted. Each wall of the courthouse is 80ft by 18ft. Problem:

asked by Kiara
186. ## ENGLISH 9 hunger games

How was recreation in the capital and the district different from each other full sentences please!!

asked by Billo
187. ## algebra

Develop a tree diagram for tossing two, eight-sided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.

asked by larry
188. ## english

can you please continue this sentence.. "Love is like a cinema" i needed this to write a good theme for my project in literature..

asked by Yeng
189. ## Calculus

Determine the limit as x approaches 1 f(x) if f(x)={3-x, x does not equal 1 and 1, x=1 A. 2 B. 1 C. 3/2 D. DNE E. None of these

asked by Anonymous
190. ## Calculus

Find dy/dx if x^2+y^2=2xy A. x/(x-y) B. (y+x)/(y-x) C. 1 D. -x/y E. None of these Do I equal it to 0 and use implicit rule?

asked by Anonymous
191. ## check my science hw please.

30. Laws can help endangered species by prohibiting A. Captive breeding B.habitat preservation C diversity of genes D. products made from the species I got D, I have a feeling that this may be wrong.

asked by Sam
192. ## Calculus

If f(x) = {x^2+3x-1, x

asked by Anonymous
193. ## biochem

How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .

asked by becky
194. ## Calculus

Find d^2y/dx^2 for y=(x+3)/(x-1) A. 0 B. y=-8/(x-1)3 C. y=-4/(x-1)^3 D. y=8/(x-1)^3 E. None of these I got a positive number but am not sure about the denominator in the second derivative.

asked by Anonymous
195. ## Calculus

If f(1)=4 and f'(1)=2, find an equation of the tangent line at x=1 A. y=2x+2 B. y=2x-2 C. y=4x-7 D. y=4x-2 E. None of these

asked by Anonymous
196. ## Calculus

Find limit as x approaches -1 (x^2+2x+3)/(x^2+1) A. 0 B. 1 C. Infinity D. DNE E. None of these

asked by Anonymous
197. ## AP Calculus

Find the derivative for f(x)=-x^2+x Do I put -x^2 on the denominator? How would I solve it if that's the case?

asked by Sarah
198. ## physics

an object moves horizontally with a velocity v=20m/s with constant acceleration a=2m/ss.how faar does it move before its velocity is doubled?

asked by ali
199. ## Math

Robyn and Shruti both run on the cross country team. Robyn runs 2 miles every day. Shruti starts her week with a 3-mile run and runs 1 mile every day, even on the day she runs the 3 miles. If M is the number of miles run during the week, and d id the

asked by Jamar
200. ## AP Calculus

For which of these functions f(x) does limit as x approaches negative infinity f(x)=2 A. (x-2)/(3x-5) B. 2x/sqrt(x-2) C. (2x^2-6x+1)/(1+x^2) D. (2x-1)/(x^2+1) E. None of these

asked by Sarah
201. ## geography

How did the geographers decide the 6main cultures

asked by Christal
202. ## Calculus

The slope of the line tangent to the curve xy+(y+1)^2=6 at the point (2, 1) is

asked by James
203. ## biochem

How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .

asked by Becky
204. ## check my science hw please.

24. can provide an economic benefit to A. drug companies B. tourists C.hikers D.endangered species I got A for my answer.

asked by Sam
205. ## trigonometry

please help me to solve this problem: calculate the angular velocity of a point for the given number of revolutions and time. express the answer on in radians per minute. 1.θ=1/2;t=2min. 2.θ=1/4;t=5min. 3.θ=2/3;t=10min. 4.θ=3/5;t=12min.

asked by deyanz
206. ## algerbra

logarithmic form of: 4y=64

asked by darlene
207. ## Calulus

Find f'(x): f(x)=(x^2-3x)/x^2 A. 2x-3/x^2 B. 2x-3/2x C. 1-(3/x) D. 3/x^2 E. None of these I can put it into the division rule for the derivative but get confused when I'm simplifying.

asked by Anonymous
208. ## Calculus

If f(x) = {x^2+3x-1, x

asked by Anonymous
209. ## AP Calculus

Find f'(x): f(x)=(x^2-3x)/x^2 A. 2x-3/x^2 B. 2x-3/2x C. 1-(3/x) D. 3/x^2 E. None of these I get confused on the simplifying part.

asked by Anon
210. ## biochem

How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab write up for tomorrow .

asked by Becky
211. ## AP Calculus

Find limit as x approaches 1 5/(x-1)^2 A. 0 B. Negative infinity C. 5/4 D. Infinity E. None of these

asked by Anon
212. ## AP calc

. If f(x) = {x^2+3x-1, x

asked by Anon
213. ## chem

The Ka of an acid is 6.3 x 10-8. To the nearest one hundredth, what is its pKa

asked by jess
214. ## Math

b_n=(-2)^(n-1)

asked by Edward

what is 2+2

asked by Bro