# Questions Asked onMarch 1, 2011

1. ## physics

Surprisingly, very few athletes can jump more than 2.0 ft (0.62 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.0 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.

2. ## statistics

A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 60 seconds.

3. ## Math: does anyone know how to solve this

1 + tan^2 (5) - csc^2 (85) = ? Would this equal 0 could someone explain this to me and the correct answer?

4. ## precalculas

The doubling period of a baterial population is 20 minutes. At time t=100 minutes, the baterial population was 80000. What was the initial population at time t=0? Find the size of the baterial population after 4 hours.

5. ## SQL

Explain why the following command would create an error, and what changes could be made to fix the error. SELECT V_CODE, SUM(P_QOH) FROM PRODUCT;

6. ## physics

A 77 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 81 cm. What is the speed of the arrow as it leaves the bow?

7. ## physics

a) What is the minimum work needed to push a 900 kg car 410 m up a 17.5° incline with zero friction? If i know this answer is 1.08e6 what equation should i use for the next part because the one i used was wrong (b) What is the minimum work needed if the

8. ## Chem

If you prepared a solution by adding 0.05mL (1drop) of 0.5M HCL to 5 x 10^7 mL of "pure" water. Calc the resultant PH. The answer isn't ph= 9.3. you have to add all the hydronium ions from all sources... but how ?

9. ## Chem molarity

A beaker contains 100 grams of 1.20 M NaCl. If you transfer 50% of the solution to another beaker, what is the molarity of the solution remaining in the first beaker?

10. ## mathematics

write a rule for nth term: 1/10, 3/20, 5/30, 7/40,.... i think the next term is 9/50 but i don't know how i got that

11. ## statistics

How heavy a load (pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Here are data from students doing a laboratory exercise: 22565 28373 25826 26468 27508 23401 24998 32436 25405 29235 29679 33661 27775 28517 30371

12. ## Statistics

The probability that a football game will go into overtime is 20%. What is the probability that two of three football games will go to into overtime? A) 0.384 B) 0.2 C) 0.04 D) 0.096

13. ## chemistry

50ml of water at 46.9 C were mixed with 50ml of water at 25.1 C in a calorimeter also at 25.1 C. The final temperature was 30.1 C Assuming that neither the density of water nor its specific heat capacity change with temperature, calculate the total heat

14. ## chemistry

Write a balanced chemical equation for the overall cell reaction represented as: a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s) c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)

15. ## Statistics

The probability that a house in an urban area will develop a leak is 5%. If 82 houses are randomly selected, what is the probability that none of the houses will develop a leak? A) 0.050 B) 0.001 C) 0.000 D) 0.015

16. ## physics

In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 1.65 m and cross the bar with a

17. ## Preclaculus Help Another

cot(40) - ((sin(50))/(sin(40)) = ? I thought the answer might be 0, but I'm not quite sure. please provide steps, too.

18. ## geometry

A wheelchair ramp has a rise from the ground of 1 foot. The ramp has a length of 14 feet. To the nearest degree, find the angle the ramp makes with the sidewalk.

19. ## science

tori wants to increase the tempreature of 500 grams of water from 20 degrees celcius to 100 degrees celecius if the specific heat of water is 4.18j/g. degrees celcius how much heat is needed ?

20. ## Algebra

I am stuck in exponential growth and decay. Here is an example. Can someone tell me how to do this step-by-step please? Here it is... The population of Mexico has been increasing at an annual rate of 1.7%. If the population of Mexico was 100,350,000 in the

21. ## physics

A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.705 rad/s. The dog does not change his pace when he sees what he has been looking for: a bone resting on the

22. ## Math

The perimeter os a tennis court is 228 feet and the lenght is 42 feet longer than the width. Write a linear system. Let w be the width of the tennis court and let l be the lenght of the tennis court. Graph the linear system.

23. ## Chemistry

HELP! I need to know if I am getting the right equation for the oxidation reaction of cyclohexene and potassium permanganate? I think it would be: C6H10+KMNO4 would become C6H10(OH) + MNO2 + K

24. ## chemistry

A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.0 mL sample of this stock solution is added to50.0 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the

25. ## science

One direction of movement of buildings from earthquake vibrations is? Hint...its a 9 letter word

26. ## math

Chris eats 3 slices of a pizza that is cut into 8 equal slices. What percentage of the pizza does he eat?

27. ## math

Two planes depart from the same airport at the same time. One hour later one of the planes is 480 miles due north of the airport and the other plane is 550 miles due east of the airport. At that time, what is the distance between the two planes?

28. ## chemistry

Determine how many milliliters of 0.102M NaOH solution is needed to neutralize 35.0mL of 0.125M H2 SO4 solution.

29. ## math

a jet flies with wind at 1100 km/h and against the same wind at 750 km/h.Find the rate of the wind and the speed of the jet in still air.

I'm really bad at these, can someone help me PLEASE? 1. Name the property shown by the statement: 9x + 0 = 9x a. Commutative Property of Addition b. Commutative Property of Multiplication c. Identity Property of Addition d. Identity Property of

31. ## Microbilogy

Albert Kluyver "From elephant to...bacteria-it is all the same!" What did he mean?

I lost my paper for the Math Riddle Pizazz page 167 about solving systems of equations and I no longer have the problems. (It is the "did you hear about the farmer who fed his cows birdseed.." page) What are the math problems for it?!?

33. ## physiC

A uniform door (0.81 m wide and 2.1 m high) weighs 150 N and is hung on two hinges that fasten the long left side of the door to a vertical wall. The hinges are 1.9 m apart. Assume that the lower hinge bears all the weight of the door. Determine the

34. ## chemistry

A 1.04L sample of gas at 759 mm Hg pressure is expanded until its volume is 2.24L. what is the pressure in the expanded gas sample (at constant temp.)

35. ## math

Find the rule for 9,16.8, 24.6, 32.4

36. ## science

gold has a specific heat of 0.130j/g. degrees celcuis if 195 joules of heat are added to 15 grans of gold homw much does the tempreature of the gold change

37. ## Physics

A bullet of mass 3.2 g strikes a ballistic pendulum of mass 3.6 kg. The center of mass of the pendulum rises a vertical distance of 13 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

38. ## high school chem 1

Equation: 4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O(g) question: What volume of NH3 is needed to react with 71.6 liters of oxygen?

39. ## MATH probability

A pair of dice is cast. What is the probability that the sum of the two number landing uppermost is less than 5, if it is known that the sum of the numbers falling uppermost is less than 7?

40. ## Geometry

IN rhombus ABCD, measure of angle DAB equals two times the measure of angle ADC and CB equals 6. Find measure of angle ACD

41. ## physics

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 15.5 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick

42. ## Math

a Frog is at the bottom of a 21 foot well. The frog jumps up 4 feet, and then falls back 2 feet. How many jumps will it take for the frong to jump out of the well?

43. ## Math

True or false, A solution of a system of linear equations is an ordered pair that satisfies one of the equations in the system?

44. ## chem

When varsol and iodine in potassium iodide aqueous solution is mixed, two phases form. What are the colours in each of the 2 phases when 2ml of I2/KI aqueous solution plus 2 ml of varsol are mixed in a test tube? What are the colours in each of the 2

45. ## Math

A basketball team scored 48 baskets in 1 game. Each basket was worth one or two points. If the team scored 84 points, how many one- point and two-point baskets did it score?

46. ## physics

a pitcher throws a 0.50kg ball of clay at a block of wood. the clay sticks to the wood on impact, and their joint velocity afterworks in 3.0m/s. what is the original speed of the clay

47. ## physics

At a time when mining asteroids has become feasible, astronauts have connected a line between their 3740-kg space tug and a 6500-kg asteroid. They pull on the asteroid with a force of 470 N. Initially the tug and the asteroid are at rest, 480 m apart. How

48. ## math

Find the rule for the sequence: 4.2, 2.6, 1, -.06, -2.2

49. ## Statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 119, and the standard deviation is about

50. ## Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

51. ## Math

Tennis balls withal diameter of 2.5 in. Are sold in cans of three. The can is a cylinder. What is the volume of the space in the can not occupied by tennis balls? Assume the balls touch the on the sides,top and bottom.

52. ## Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

53. ## Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the tension in the string?

54. ## Chemistry

I need help classifying these as physical and chemical properties! 1. sodium metal in chlorine gas releases luster. 2. sodium metal has a metallic silver luster. 3. sodium metal in water porduces hydrogen gas. 4. sodium metal melts to a liquid at 98

55. ## statistics

A simple random sample of size n = 300 is obtained from a population whose size is and whose population size is n=20,000 ans whose proportion with a specified characteristic is p=0.8. Describe the sampling distribution of P^. A) Approximately normal; ìp =

56. ## Math

For the sequence, describe the pattern, write the next term, and write a rule for the nth term. 2/3,4/4,6/5,8/6,...

66. ## science

a sliver coin and a gold coin each have a mass of exactly 6.6 grams the specific heat of sliver is 0.235j/g.degrees celcius and the specific heat of gold his 0.130j/g. degrees celcius what coin requires more heat to raise its tempreature by 40 degrees

67. ## question

A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 180 degrees

68. ## physics

How much exertion in pounds does it take a woman who weighs 115 pounds to push a cart that weighs 50 pounds?

69. ## chemistry

A 6.0 L flask contains a mixture of methane, argon and helium at 45 degrees C and 1.75 am. If the mole fractions of helium and argon are 0.25 and 0.35, respectively, how many molecules of methane are present?

70. ## physics

a karate chop delivers a force of 3000 N to a aboard that breaks. the force that the baord exerts on the hand during this event is A. Less than 300N B. 3000 N c. Greater than 3000N d. need more info

71. ## grammar

'I might' a thought of that closet. Correct this sentence

72. ## statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about

73. ## sociology

The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Non-acceptance; acceptance B.) Neutrality; non-acceptance C.) Non-acceptance; neutrality D.)

74. ## calculus

Determine the values of a and b for the function f (x) = ax^3 + bx^2 + 3x - 2 given that f (2) = 10 and f ′(-1) = 14. Please help, Thanks!

I have two questions: If a parallelogram is a rhombus, then the diagonals are congruent- I don't think so in all cases-they can bisect each other and are perpendicular, correct but not necessarily congruent so this should be false? Secondly, A kite is a

76. ## chemistry

459 torr is how much in atm, pascals, and mm Hg?

77. ## physics

A merry-go-round starts from rest and accelerates uniformly over 29.0 s to a final angular velocity of 5.35 rev/min. (a) Find the maximum linear speed of a person sitting on the merry-go-round 4.50 m from the center. (b) Find the person's maximum radial

78. ## science

a 100.0 gram metal sample is heated to a temperature of 110 degrees celcius then placed into a calorimeter containing 100.0 r of pure water (at initial temperature of 23 degrees celcius). after the sample and water reach thermal equalibrium, their final

79. ## Algebra 1

using the vertical motion model h=-16t + vt + s You and a frine are playing basketball. you can jump with an initial velocity of 12 feet per secon. You need to jump 2.2 feet to dunk a basketball. your friend can jump with an initial velocity of 14 feet per

80. ## chemistry

Write a balanced chemical equation for the overall cell reaction represented as: a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s) b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s) c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)

81. ## chemistry

You have a 12.01 g sample of carbon. The average mass of a carbon atoms is 1.994 x 1023 g. How many carbon atoms are in the sample?

82. ## Physics

Please help! suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

83. ## statistics

The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about

84. ## Physics

If an 80-kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?

85. ## Physics

Please help! Suppose that a 400 gram copper object (specific heat 0.092 cal/g/degrees Celsius) receives 900 cal. of heat. What is the temperature change? Explain your reasoning. Do not use algebra Thanks!

86. ## chemistry

____ 14. Adding a charged particle common to two solutes decreases solute concentration. This observation demonstrates a. the common-ion effect. c. hydrolysis. b. Le Châtelier's principle. d. buffering.

87. ## Psychics

Bradley, working in his 23 C kitchen, is cooking himself a crepe in an iron skillet that has a circular bottom with a diameter of .30 m. How hot must the skillet be in order for Bradley to make a 710.3 m^2 crepe that just fills the bottom of the pan?

88. ## physics

A 23.0 kg box is released on a 39.0° incline and accelerates down the incline at 0.268 m/s2. Find the friction force impeding its motion.

89. ## bca

____ is the code of acceptable behaviors users should follow while on the Internet; that is, it is the conduct expected of individuals while online.

90. ## physics

Two charges are separated until they are a distance of 191 cm apart, causing the electric force between them to increase by a factor of exactly 5. What was their initial separation distance?

91. ## geometry

Basic Geometry 1. Find the perimeter of a rectangle 19 cm long by 27.8 cm wide. 2. In triangle ABC, angle A = 47°, and angle B = 8°. Find angle C. 3. Find the perimeter of a triangle with sides of length 28 cm, 47 cm and 19 cm. 4. In triangle FGH, angle

92. ## chemistry

100ml solution made up 1.0M NH3 and (NH4)2SO4 have been added with 100ml of 0.1 HCl. how many moles are present in the solution before and after? given the pH of the solution is 9.26

93. ## chemistry

A pair of students performs an experiment in which they collect 27 g CaO from the decomposition of 41 g CaCO3. Are these results reasonable? Explain your answer using percentage yield.

94. ## precalc

Find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

95. ## chemistry

What volume at STP would be required to react with 0.100 mol of hydrogen to produce ammonia?

96. ## chemistry

What are the differences between ionic bonds and covalent bonds?

97. ## math

Tom wrote a two-digit number.He multiplied it by 3, added 18, and divided by 8. His final answer was 9. What number did Tom write?

98. ## chem

I need help classifying these as physical or chemical changes! 1. sodium metal exposed to air turns dark gray. 2. steam in a test tube condenses to moisture. 3. baking soda in vinegar releases bubbles. 4. water dissolves in vinegar to give a solution. 5.

99. ## Algebra 1

a recent 12 year period,, the total government payroll in the US can be modeled by P= 26t^2 + 1629t + 19,958, where P is the payroll in million of dollars and t is the number of years since the beginning of the 12 year period 1) Use the discrimnant to show

The general term for market structures that fall somewhere in-between monopoly and perfect competition is?

101. ## Math algebra

A 120- foot long rope is cut into three pieces the first piece of rope is twice as long as the second piece of rope the third piece of rope is three tines as long as the second piece of rope what is the length of the longest piece of rope?

102. ## science

the specific heat of sliver is 0.235j /g.c. how much heat is neeeded to raise the tempreature of an 8 gram sliver ring be 50 degrees celecius

103. ## science

what is the formula for calcium and oxygen

104. ## English

1. The news about the hurricane is _____ in the newspaper. comparative form of clear) 2. My brother has seen this movie _____ than he has seen any other. (comparative form of often) 1.clearer 2.more often

105. ## cambo

180 ft long board is cut into 3 pieces. The second piece of board is twice as long as the first. The third piece of board is six times as long as the first. What is the length of the first piece of the board?

106. ## chemistry

A sample containing .187 g cl is dissolved in 50.0 mL water. How many moles of cl ion are in the solution? what is the molarity of the cl ion in the solution?

107. ## geometry

Find, to the nearest tenth of a centimeter, the length of a diagonal of a square if the measure of one side is 8.0 centimeters.

108. ## Chemistry

What is the molality of a 0.065M solution of ethyl alcohol in water at 25 degrees Celcius? (Assume the density of the solution at such low conentration is equal to that of water at 25 degrees Celcius, 0.997 g./mL)

109. ## calculus

Determine the equations of two lines that pass through the point (1, -5) and are tangent to the graph of y = x^2 - 2.

Anita says that the plus sign + forms 2 pairs of verticle angles. Charles says it forms two pairs of congruent angles. Who is correct?

111. ## math

The opposite angles of a parallelogram are congruent. The adjacent angles are supplementary. If angle X measures 110 degrees, then what are the measures of angle Y and angle Z?

112. ## math

Hitomi has a total of 30 red and blue bowling balls at her bowling alley. Each red ball weighs 8 lb. each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have???

113. ## Calc

"Consider the surface given by 4x^2-y^2+5z^2-10z=55. a) Find all points on the surface at which the tangent plane is parallel to the plane 8x+y+15z=1. b) Pick one of these points and give the equation of the tangent plane to the surface at that point."

114. ## Physics

conical pendulum is formed by attaching a 0.200 ball to a 1.00 -long. It has a radius of 40.0cm . What is the angular velocity of the ball if the tension in the string is 2.14N?

115. ## math-163

for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

Your team has been hired as consultants by a company and is meeting with the executive boardPrepare a 15- to 20-slide PowerPoint® presentation with detailed speaker’s notes that describes the ISO 14001 certification process. Address the following

¿Cuenta en español? Si, yo cuento en español. ¿Puedes contar en francés? No, no puedo contar en francés.

118. ## Math

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. 6.2 • 107 / 4.15 • 103

119. ## Chemistry

80.0 grams of KBr is mixed with sufficient water to prepare 1865 mL of solution. This solution is then mixed with 46.3 mL of 0.425 M KCl solution. 12 mL of this mixture is subsequently added to 61.0 mL of distilled water. Calculate the molarity of K+ ions

120. ## statistics

A supplier of plastic pellets claims that when the plastic is pressed into wafers of uniform thickness, they will have a mean breaking strength of 165 newtons and a standard deviation of 5 newtons. An engineer at the company randomly selects wafers from 12

121. ## Science

Suppose the partial pressure of one gas in a mixture decreases by 5 kPa. How does this change affect the total prelssure of the mixture?

122. ## Math

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. -14xy / 42x^5y^8

123. ## High School chem 1

2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2) Question: How many molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?

124. ## chemistry

A reaction mixture is in a 5.4 L flask at 25 oC initially contains only 7.64 grams of acetic acid. (CH3COOH). Set up your I.C.E. table and use it to answer the following questions. HINT: You will need to look up the Ka for this equilibrium reaction.

125. ## cal

The circumference of a sphere was measured to be 86.000 cm with a possible error of 0.5 cm. Use linear approximation to estimate the maximum error in the calculated surface area and Estimate the relative error in the calculated surface area.

126. ## chem help urgent!

i only have one submission for these and i dont' really know how to tell which one has the higher boiling point. can you help? Of each pair of solids, which one has the higher melting point? Kr(s) or Cu(s) and.. CCl4(s) or SiCl4(s)

127. ## math

Perform the indicated operation and, if possible simplify. 7/12+(-3/5)

128. ## sociology

The general trend of American's attitudes toward the unmarried has been from an attitude of _____ in the 1950s to an attitude of ______ in the 2000s A.) Non-acceptance; acceptance B.) Neutrality; non-acceptance C.) Non-acceptance; neutrality D.)

129. ## Chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

asked by i dont know how to set it up!
130. ## Math

Anita says the plus sign + forms 2 pairs of vetical angles. Charles says it forms 2 pairs of congruent angles? Who is correct, and why? Wouldn't it be both, because there are 2 pairs of opposite angles with the same measure, and 4 congruent angles.

131. ## biology

A question in Campbell's 8th edition study guide for AP Biology says: A multifactorial disorder _. Answer: has a collection of symptoms traceable to an epistatic gene. There is another answer choice which says : has both genetic and environmental causes.

132. ## physicssssss

In a cargo plane, the center of gravity must be between the front and rear landing gears in order to maintain a torque equilibrium. The front landing gears help counteract the torque provided by the rear landing gears in this case. A jet transport has a

133. ## math

Ashley can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?

134. ## pre calc

find the exact values of the six trigonometric functions of theta if the terminal side of theta in standard position contains the given point: 1. (8, 4) 2. (4, 4√3) 3. (0, -4) 4. (6, 2)

135. ## bio

You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl

136. ## calculus

PLEASE HELP! Transform polar equation to an equation in Cartesian (rectangular) coordinates. Then identify where it locate on the graph. r sin θ = 4

137. ## Math

Barbara is playing a game. She jumps forward 5 feet, and then steps backward 2 feet. How many jumps will it take her to reach the finish line, which is 20 feet from where she started? Make a table to show Barbara's position. Barbara will reach 20 feet on

138. ## IT/210

Assignment: Currency Conversion Design · Complete the hierarchy chart in Appendix H and the flowcharts in Appendix I, based on the Currency Conversion requirements and Input-Process-Output table you generated in Week Two. · Develop the pseudocode for the

139. ## Physics

The force on an object is described as a function of time equation: F(t) = 3t^2+7t What is the impulse delievered by the force over a period of time from 0 to 5.0s? What is the average force exerted on an object over this time period? If the object has a

140. ## economics today

Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following:

141. ## statistics

The distribution of the heights of men in the U.S. is normally distributed with a mean of 70 inches and a standard deviation of 5 inches. a) What is the probability of an american male being less than 60 inches tall? b) What is the probability of an

142. ## Science

A new organism is found that is multicellular, does not have a backbone, and has six legs. How would you classify this organism?

143. ## physics

formulation of hypothesis for the prepation of a standard solution of oxalic acid with a concentration of 0.05mol.dm3. very desperate

156. ## Algebra

Explain the advantages of the vertical and horizontal methods of multiplying a binomial and a trinomial.

157. ## Algebra

Can you write a binomial in standard form with a degree of 0? Can you write a binomial with a degree of 3? Explain.

158. ## statistics

The income of college students is normally distributed with a mean income per year is $12,000 and a standard deviation of$6,000. a)If we randomly sample 25 college students, what is the probability that the average income of our sample is less than

159. ## sociology

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

160. ## sociology

The general trend of American's attitudes toward the unmarried had been from an attitude of _________ in the 1950s to and attitude of _________ in the 2000s

161. ## math

You are playing a card game with a deck of 52 cards.You win if you draw a red card that is a multiple of 5.What are your chances of winning on your first draw?

162. ## English

When is Diego's school's anniversary? 1. It will be next month. 2. It is next month. (Which answer is correct? Are both correct? Which one is commonly used?)

163. ## physics

A door starts from rest and swings with an angular acceleration, alpha, α = 6 rad/s2, where t is in seconds. Determine the angle in radians through which the door turns in the first 3 s. Hint: kinematics equation for angular position (i.e., angle) is

164. ## High school chem 1

4NH3(g) + 5O2(g) -> 4NO(g) + 6H20(g) what mass of H2O can be produced from 350 liters of NH3?

165. ## chemistry

a tank contains 2.6 mol of nitrogen and 1.3 mol of oxygen. If 0.65 mol of oxygen were added to the tank, what effect would this have on the pressure in the tank?

166. ## Science

What can you conclude about the reverse change Cr2O7 to 2 CrO4 and its dependence on hydroxide ions? Produce a balanced equation bu adding the proper number of OH- ions and H2O molecules to the appropriate sides of the equation.

167. ## math

a circular coin has a radius of 8.2 mm. What is its circumference ,rounded to the nearest tenth?

168. ## Math - Arithmetic

Qn: Given that 3, b, c and 18 are an Arithmetic Progression. Find the value of b and c.

169. ## calculus

Find the volume of the solid whose base is the region bounded between the curve y=sec x and the x-axis from x=pi/4 to x=pi/3 and whose cross sections taken perpendicular to the x-axis are squares.

170. ## trigonometry repost .

This is an outline that i have to use to find the solution of the question. It involves logarithms and half-angle formulas.I have worked though it but got stuck on some parts. I'd like if you look over my work. solve the triangle for which given parts are

171. ## Chemistry

If you react 55g of hydrazine and 55g of oxygen gas, what is the maximum moles of nitrogen dioxide gas that can be made and what is the limiting reagent?

I have two questions If a parallelogram is a rhombus, then the diagonals are congruent- I don't think so-they can bisect each other and are perpendicular, correct but not congruent Secondly, A kite is a quadrilateral that has exactly 2 pairs of consecutive

173. ## science

A golf ball and a ping-pong ball are dropped in a vacuum chamber. When they have fallen halfway down, they have the same?

174. ## physics

A baseball mass of 150.0g, is thrown by the pitcher toward the home plate with a velocity of 45.0 m/s. it is hit back at the pitcher with a velocity of 60.0 m/s, what is the average force on the bat, if the ball and bat are in contat for a time of 100.0

175. ## math 117

multiply and simplify 10b^6/3r^2 x 9r^7/100b

176. ## Physics

A gunman shoots from a riffle in a horizontal direction without correcting for gravity. How much below the intended target, at a horizontal distance, will the bullet strike if its initial speed is Vo??

Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus

178. ## rounding fractions

Round 10 2/3 to the nearest whole number?

179. ## Math

24x - 10 = 18x - 4. Please I need operations for this equation

when a disaster hit an area, the costof everything, food, water, housing, gas, and so forth, seems to go up immediately. Explain why this phenomenon say be a good thing using the laws of supply and demand?

181. ## Organic Chemistry

what is the major product if 2,3,3-trimethylpentane was mixed with IBr?

182. ## physics

The table shows the power ratings of four electrical appliances. Fan heater 2 kW Oven 3 kW Kettle 2 kW Microwave oven 0.75 kW The kettle is used for a total of 30 minutes a day. It has an efficiency of 0.9 What is the cost of the energy wasted by the

183. ## Physics

Suppose equal volumes of iron and water interact thermally. Which will change temperature more? If they are initially 30 Celsius degrees apart in temperature, how much will the temperature of each change? Explain your reasoning. Thanks!

184. ## Statistics

A typist at a constant speed of 65 words per minute makes a mistake in any particular word with probability 0.06, independently from word to word. Each incorrect word must be corrected, a task which takes 14 seconds per word. Find the mean of the time (in

185. ## Chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia?

asked by i dont know how to set it up!
186. ## Calculus

Find the derivative of F(z)=3+cos(2z-1)

187. ## chemistry

What volume at nitrogen would be required to react with 0.100g of hydrogen to produce ammomia? I need help setting it up!

asked by i dont know how to set it up!
188. ## pre-calculus

please help me with thisone thanks solve the inequality algebraically. Express the solution in interval notation. (x-8)^2/x^2-36 > 0

189. ## Calculus

1. Use cylindrical shells to compute the volume of the solid formed by revolving the region bounded by y= 2x and y = x^2 -3 about x= 6. 2. Find the volume of the solid formed by revolving the region bounded by y= e^x , y= e^-x, and y= 3 about y= 5.

190. ## college math

Find the distance of the shotcut and the distance of the long way for two locations. find the number of seconds saved ( 2.1 and 5.8) Approximate the are of the affected region (24 and 248 Sq Ft). find the average amount of oxgen saved per second saved

191. ## Biology

Name the intermediates of the Calvin cycle... I am thinking it is 1) Carbon fixation 2) Reduction 3) Regeneration But I believe it is wrong because they are stages... :S help anybody?

192. ## statistics

there are 80 students in a math class.20% of the students in the class scored above 50 marks in the test. what is the average of those students who scored below 50 marks

193. ## math163

Please i need all the process.. thank you.. for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

194. ## physics

if |A|=2, |B| =4, |C| =5, find the vector sum a+b+c in ordered pair notation, also find the angle theta

231. ## algebra

a truck has a diameter of 25 inches. a tack is stuck on the bottom of the tire. if the truck travels one mile, how many times will the tack touch the road?

232. ## psychology

If you had to argue that either genetics (nature) or environment (nurture) has the greater impact on human development, which would you pick and why?

233. ## chemistry

why is hydrogen bonding inly possible with hydrogen?

234. ## Statistics

In the harper valley subdivision, 79% of the houses have a deck while 49% of the houses have both a deck and a garage. Find the probability that the home has a garage given that it has a deck

235. ## accounting

I need help with Intermediate Accounting 303 on-line

236. ## english

In the sentence: Then within two years, King Uther fell sick of a great malady. The word within is a/an: A. verb B. preposition C. pronoun D. adverb I'm stuck between B and D. help? Thanks!

237. ## Religion

What is the best definition of the Belief perspective? My book does not define it just relates Ultimate Reality existance to it. Thank you for bring a clear understanding to me.

238. ## math

i still don't get it ms sue for 3.14 x 16.4 it will equal .376 not 51.996

239. ## chemistry

How much heat is required to convert 0.4 kilograms of ice at 0 degrees celsius to water at the same temperature?

240. ## French - Help :(

Hi all. I'm trying to write a paragraph in french. These are my instructions: Décrivez vos activités habituelles pendant les vacances dernières en utilisant au moins sex verbes réfléchis à l'imparfait. This is what I want to say: Last winter, I did

241. ## math

a rectangle has length which is twice the width. if the diagonal is the 5 times the square root of 5 meters long, find the perimeter of the rectangle.

242. ## Trig

Use Trig identities to verify that sec^4(x)-tan^4(x)=1+2tan^2(x), Only work with one side of the equation

243. ## math

There are nine equally likely outcomes if you spin this spinner twice (x,y,z) 1) Three of the 9 equally likely outcomes are xx,yy and zz. List the other six outcomes. 2) If you spin the spinner three times, what is the probability of getting yyy? Explain

244. ## SraJMcGin

Thanks a lot for your previous help with my assignments, and I have Windows. I don't know how to make accent marks:\

245. ## science

what is the human life cycle

246. ## COM / 220

I need help with the DQ 2 week 2. Could someone help me please?

247. ## Math Check

the angle with 60 degrees has a reference angle of 60 degrees?

248. ## Measurment

What is the area of this triangle with 22,16,28 And a nine in the middle?

249. ## health

Define incidence rate and incidence proportion. Identify the differences

250. ## physics

if |A|=2, |B| =4, |C| =5, find the vector sum a+b+c in ordered pair notation, also find the angle theta

251. ## Math repost

I posted this question before at 7:14 I think the answer to it is 0. cot(40) - ((sin(50))/(sin(40)) = ? these are also degrees steps too please. I thought since 50+40= 90 then that part would be 1, but then how would cot 40 turn out to be 1

what are the 10 most critical issues challenging human services agencies today?

253. ## math

if a octagon has a perimeter of 88 centimeters, what is the measure of each of its sides?

254. ## cal

Let f(x)=-5e^(x+1)+e^8 . find f'(0)

255. ## Inter algebra

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. (10x-5)-5

256. ## physical science

At the bottom of a well one quarter of radius of the earth deep your weight compare to your normal weight would be

257. ## Physics

A car is traveling a road that makes quarter of a circle with a constant speed. What is the magnitude of the average velocity of the car?

258. ## math

how do i rename mixed nimber in simplest form.15/8

259. ## German

which preposition is most suitable 1)Mraias Zimmer ist______ Dritten Stock 2)Die Wohnung ist_____einem Hochhaus ------------------------------------------ a)Im Kleiderschrank _____meine Kleider(HANGS)

260. ## chemistry

why is hydrogen bonding only possible with hydrogen?

261. ## Calc

"Let f(x,y)=2(x^2)y-(y^3)+x-4. a) Find the local linearization of f at (3,1) b) Compute the directional derivative of f at (3,1) in the direction towards the point (-2,3). At (3,1), is the function f increasing or decreasing in the direction towards the

262. ## Physics

Two stones are thrown vertically up with initial velocity Vo, second stone with a time delay To with respect to the first one. At which time after the beginning of the motion the two stones will collide? Is this scenario possible for any Vo and To? What

263. ## geography

Can you check my answer. What is the capital of the nation that is located at the southern tip of Africa? My answer is Tshwane(Pretoria) Is this correct?

264. ## Inter algebra

help, I am stuck on this one. -ã(7c)^2

265. ## algebra

what is an example of a function that you might encounter in everyday life and describe its domain and range.

266. ## agebra

simplify -14xy / 42x^5y^8

267. ## Math

Confused on permutation or combination on this question: A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow? I know the formulas but I am having a hard time determining which one to use.

268. ## math

what is dimensions of an acre? and size of football field?

269. ## IT/210

Design a program that models the worms behavior in the following scenario: A worm is moving toward an apple. Each time it moves, the worm cuts the distance between itself and the apple by its own body length until the worm is close enough to enter the

1 + tan^2 (5) - csc^2 (85) = ? Would this equal 0 could someone explain this to me and the correct answer?

271. ## Math

tan(-120)= sqrt 3 OR - sqrt 3 (Helper stated that it was sqrt 3) But, I'm just confused over this part: for even vs. odd functions it saids that tan(-angle) = - tan(angle) so the even vs. odd doesn't matter since tan is positive in the QIII?

272. ## algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = X²- 1

273. ## medical billing

which health nsuane program is designed to complement the retiremet survivor and disabiity insurance enacted under title 11 of the social security act

274. ## Math

What answers this definition: A polynomial, you would write the polynomial as a product of factors.

275. ## Math

I'm doing a proportion for a problem. Would it be $/ft = ft/x or$/ft= x/ft

276. ## mth

PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

277. ## geometry

what is the angle of inclination for 7x + 3y = 9?

278. ## math

if 65% of students are wearing t shirts and 48% are wearing jeans is this possible? Please explain.

279. ## math

can 25% of something be greater than 50% of something else? Please explain.

280. ## physics

If a 9800kg train car traveling at 15m/s impacts another train car at rest and after the impact the 2 are going 6m/s. What is the mass of the second train car?

281. ## hardware

Hi i'm just stuck on this question. can please someone help me. Three cortrect ones are: A) A 9-bit word represents twice as many code words as an 8-bit word. B) mp4, mpg and bmp are all examples of video file extensions. C) A data rate of 4 gigabits per

282. ## French

I'm supposed to come up with something in the imparfait that begins with "Quand j'étais petite, ... but my vocabulary is very limited so I don't really know what to write. Any suggestions?

283. ## hum176

can u help me get a better understanding of why freedom of speech allows a variety of pop culture media to be released.

284. ## math

how do I solve (.5x?)-1.4=.85

285. ## math

a percan pie 40 ft in diameter was baked in oklahoma,in 1989. What was the pie circumference ,rounded to the nearest foot? plz shoe work

286. ## algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = x² - 1

asked by bianca, pleeease help i'm lost
287. ## Science

how do oxidation-reduction and phosphorylation reactions drive the glycolytic pathway?

288. ## english

why are string puppets harder to make &use than finger puppets?

289. ## English

How Did Patria Mirabal foreshadow in the book " In the time of a butterflies" ?

290. ## science

when a liquid wax is turned into a solid is it a chemical reaction?

291. ## Fractions

Maria played with her dolls for 45 minutes.this coima also be written as?

292. ## algebra 2

What is the quotient: (–3x3 + 16x2 + 13x – 6) ÷ (3x – 1) ?

293. ## psychology

I need an example of how one domain of development impacts the other two.

294. ## algebra

Find the functional values f(-2), f(0), and f(1) for the function. ƒ(x) = x² - 1

asked by bianca, pleeease help i'm lost
295. ## English

where can i find help about direct and indirect objects

296. ## Math

blank is a polynomial, you would write the polynomial as a product of factors?

298. ## biology

what forms between the other two primary tissue layers

300. ## Pre-Algebra:HELPPP

Factor: y^3-3y the ^ is an exponent is the answer y(y^2-3)

301. ## Francais

Je pense que vous cachiez quelque chose dans tes estomacs: is the subjunctive in cachiez correct? (I think that you are hiding something in your stomachs).

302. ## math

PLEASE I NEED HELPPPPP.. i have many exercises like that, just want to know where to start thanks. f(x)= x^3+2x^2-x-2 / x^2+x-6 find: 1. domain 2. symmetry or not 3. determine if f(x)is: a)in lowest trem b)proper/improper 4. x-intercepts, y-intercepts 5.

304. ## Algebra 2

I am totally lost! (3x^4--8x^2 -3x-3) / (x^2-3)

305. ## Medical Office Asst

On the ADA for Keith Konklin, the number 333-2589 should be placed in block A( #7 B) # 18 C0 # 19 D) #31

306. ## Physics

An object moves from the position (1,3,-5) to position (-1,4,8) during time 8 s. what is the average velocity?

307. ## Math

Subtract $259.60 from$300 can you work it out for me, im having a hard time.

308. ## Math

Solve: 3x-2(3x-1)+4(x+1)=0

309. ## French

I think that you are hiding something in your stomachs. Je pense que vous cachiez quelque chose dans tes estomacs. ^did I use the subjunctive correctly?

310. ## helppppp :)

how can we help african people who is having a hard time with poverty? :)

311. ## Science

How does the movement of electrons and protons create large amounts of energy in oxidative phosphorylation?

312. ## Microbiology

The ability of farmers around the world to produce crops such as corn, wheat, and rice is often limited by the lack of nitrogen-based fertilizer. How might scientists use Beijerinck's discovery to increase world supplies of grain?

313. ## algebra

what is the slope of a line parallel to y=1/2x+2.3

314. ## math

would a banana way a gram or a kilogram?

how does the salinity of a solution affect osmosis in an onion cell?

316. ## math

determine limit √3, √(3√3), √(3√(3√3))

317. ## Stoichiometry

How man liters of hydrogen should have been collected by reacting .045 grams of magnesium?

318. ## math

x/4-4=3x/4-6 plz show step by step

319. ## Math

I have no idea how to do this problem: Select the expression below that is equal to 4(9-m). A. 4m-36 B. 13-m C. 36-m D. 36-4m

320. ## math

find the length width and area of an object where the perimeter is fixed at 20 meters

321. ## bio

what are the two structural components of a chromosome

322. ## denominators

v/3 +v/v+5 = -4/v+5

what are some examples of everyday kid ritual?

x/2-4=-5