# Questions Asked onApril 5, 2013

1. ## physics

If a body weight 10N is lifted from the floor to a table 2m above the floor ,calculate the potential energy gained.What happens to the energy if the body falls of the table and hits the floor?

2. ## Trigonometry

How do I prove that sin(x+y)-sin(x-y)=2cosx siny

3. ## Physics

A figure skater rotates about a vertical axis through her center with both arms and one leg extended. Her rotation rate is 0.65 rev/s. She then pulls her arms and leg closer to her body and begins to spin at a 1.85 rev/s. What is the ratio of her new

4. ## Math

1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)

5. ## STATISTICS

A particular cell phone company offers 4 models o phones, each in 6 different colors and each available with any one of 5 calling plans. How many combinations are possible?

6. ## Algebra

A box with no top is to be constructed from a piece of cardboard whose length measures 6 inch more than its width. The box is to be formed by cutting squares that measure 2 inches on each side from the four corners an then folding up the sides. If the

7. ## Spanish 2

Fill the blank with the correct object pronoun. A nosotros ___________ aburre ir de compras.

8. ## Biology

Explain the role of white blood cells in the body's defense against foreign substances.

9. ## Biology

What are some of the treatments for coronary artery disease?

10. ## PHYSICS

A truck has a momentum of 5.8x10^4 Ns [S]. An average force of 2.2x10^3 N [S] increases the truck's momentum for the next 8.8s. What is the impulse and final speed of the truck?

11. ## MAth

the measurement on one side of a right triangle is found to be 9.5 inches inches, and the angle opposite that side is 27 degrees,45' with a possible error of 15'. (round answers to two decimal places) a) Approximate the percent error in computing the

12. ## Grammar

Which verb completes the sentence below correctly? Each of the players ______ given a small trophy. was *(my answer) were Thanks for the help!

13. ## World Geography

REVIEW 1.How do lines of latitude and longitude help geographers study Earth? A. These lines show geographers the direction of Earth’s rotation around the sun. B. These lines help geographers see the difference between oceans and landforms on Earth’s

14. ## math

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. No there is no common side (lets say.) Thanks

15. ## Physics

if a toy car's motor propelled it 1.905m in 7.1 seconds and it kept rolling .38m for 8.6 seconds what is the coefficient of friction between the wheels and the floor assuming that is the only source of friction. i know accel=.08m/s2 and -.12m/s2 but after

16. ## Algaebra

A rectangular swimming pool is 5 feet longer than it is wide. If a concrete walk 2 feet wide is placed around the pool, the area covered by the pool and the walk is 156 square feet greater than the area covered by the pool alone. What are the dimensions of

17. ## Physics

Determine the electric potential energy for the array of three charges shown in the drawing, relative to its value when the charges are infinitely far away. (Let q1 = 8.48 µC, q2 = 19.2 µC, and q3 = -16.1 µC.)

18. ## chemistry

What is molarity of propanol, C3H7OH, when 60. mL propanol is mixed with enough H2O to make a final volume of 100. mL? The MW of propanol = 60.11 g/mol and the density of propanol = 0.804 g/mL.

19. ## Calc

Find the present value of \$14000 due in 9 years at the given rate of interest. (a) 2%/year compounded semiannually? (b) 5%/year compounded semiannually?

20. ## English

Mandy interviewed a source who told about how she was illegally treated by the police. Using her information in the speech is an example of: A. facts and statistics. B. narrative. C. testimony. D. hypothetical example. i'm confused between B & C 2. An

21. ## Calculus

the measurement on one side of a right triangle is found to be 9.5 inches inches, and the angle opposite that side is 27 degrees,45' with a possible error of 15'. (round answers to two decimal places) a) Approximate the percent error in computing the

22. ## UNDERSTANDING OBSERVATION AND BEHAVIOR

The Child Development Checklist is an observation tool that A. includes space to record non-objective data. B. omits references to children's emotions. C. focuses on sequences of child development. D. can only be used by one observer for the same child.

23. ## Math

Henry is a quality control inspector. He is watching the production line for Barb's Raisin Cookie. Henry will reject a cookie with less than 8 raisins. In the past, one out of every 100 cookies had less than 8 raisins. Find the probability that the first

24. ## math

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension.

25. ## Physics

A 35kg child is swinging on a swing with length 2.8m to the bottom of the seat. At the highest point of the swing, the rope makes an angle of 42 degrees from vertical. Calculate the speed of the child at the bottom of the swing. Assume no thermal energy is

26. ## math

n is a digit such that the 5-digit number n878n is divisible by 9. What is the value of n?

27. ## World Geography

REVIEW 1.Which of the following is an abundant natural resource found in Canada? A. Gold B. Timber C. Soybeans

28. ## geometry

LMNO is a parallelogram. If NM = x + 15 and OL = 3x + 5, find the value of x, then find NM and OL

29. ## algebra 1

What is the speed, in miles per hour, of a toy car that runs 40 feet in 8 seconds? Round your answer to the nearest whole number. (1 hour = 3600; 1 mile = 5280 ft)

30. ## Physics

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.44 mm (4.40 10-4 m). A screen is located 2.1 m from the double slit. At what distance from the center of the screen will the second dark fringe beyond the

31. ## Chemistry

Consider the salt FeSO4.7H20. What quantity in grams of salt could be produced from 1g of iron, assuming the overall reaction yield is 75% ? :) Thanks in advance!

32. ## math

The square yard you are mowing has an area of 9600 ft^2. What is the side length of the yard? Round your answer to the nearest tenth of a foot if necessary. Please solve and explain

33. ## English

1. When researching for supporting materials about the impact of violence in the media, it is a good idea to get assistance from this resource. A. Television B. Call-in radio C. Librarian D. Personal interview is it D 2. An advantage of using media

34. ## English

1. In conducting a personal interview, setting limits on what will be covered should occur: A. at the beginning of the interview. B. in the middle of the interview. C. at the end of the interview. D. during the strategy stage. i'm confused between A & D 2.

35. ## Math

How do you get the big number on a runaway math puzzle worksheet

36. ## Medical Transcription

The patient obtained records in order to save the nurse a phone call to her previous doctor and she made sure to ask right away for this to be done to save time. Is this sentence a run-on, usable, or correct as is?

37. ## physics

A police offer may warn that “speed kills.” In video games, high-speed crashes are common. Suppose a particular scene in a game required the following elements: • a high performance motorcycle must crash into a barrier and be stopped • a small

38. ## math

in how many different orders can 4 children be arranged in a line,if john and julie refuse to stand next to one another ?

39. ## math

john is the age that sally was 3 years ago,13 year old elissa is 3 years older than sally,how old will john be on his next birthday?

40. ## AP CHEM

Aspirin has the structural formula below. Which functional groups does this molecule contain? I. Acid II. Alcohol III. Ester IV. Ether I have no way of posting the structure, but it is on google images! If you type in aspirin structural formula, it's the

41. ## health

After ejaculation, the sperm can live for about ____ in the female reproductive tract

42. ## Biology - URGENT Enzyme Lab

Did a catalase producing hydrogen peroxide lab, used manganese dioxide, fresh frozen liver, potato, ice, fine clean sand, etc. Basically just added hydrogen peroxide to the catalysts under diff conditions and stuff. Just don't get this question which is :

43. ## algebra

An investor invested a total of \$2200 in two mutual funds. One earned 5% profit while the other earned a 3% profit. If the investor's total profit was \$86, how much was invested in each mutual fund?

44. ## World Geography

REVIEW 1.What type of information does a physical map show? A. Natural features

45. ## Physics 1

A mass m1 = 4.9 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.7 kg which hangs freely from the string. When released, the hanging mass falls a distance d = 0.8 m.

46. ## World Geography

REVIEW 1.Where is Canada’s population density highest? A. In the cities of Northern Canada B. In cities in central Canada

47. ## math

The three terms x+12, 3x+5 and 2x+25 are the first three terms of an arithmetic progression. What is the value of x?

48. ## math

Find a positive integer N, such that when N is added to 98, it gives the same result as N multiplied to 98.

49. ## Algebra

A room is shaped like a trapezoid. There are windows on the walls that are parallel. The distance between the windows is x. The length of one windowed wall is 3 less than the x, and the length of the other windowed wall is 3 more than x. The area of the

50. ## Chemistry

a)Would you expect the empirical formula you determine for magnesium oxide to be the same as the one determined by another student? b) Would you expectan empirical formulato be the same even though different masses of Mg were used? Briefly explain. c) If

51. ## physics

A flying bat emits squeaks at a frequency of 80 kHz. If a stationary observer picks up the frequency of the squeaks as 78 kHz, determine the speed at which the bat is flying

52. ## Biology

Explain what happens when a person with AB+ donates blood to a patient with A+ blood type?

53. ## Chemistry

Calculate the enthalpy change when 45 g of ice at -40.0 oC is heated to completely melt to liquid water at 0.0oC. (The heat of fusion for water is 333 J/g.)

54. ## physical geography

in the northern hemisphere the weather map showing isobars and the positions of cold and warm fronts

55. ## college math

I posted this problem earlier, but I still can't figure it out. It is for extra credit. I was hoping if someone could please solve it. I would greatly appreciate it. A bourbon that is 51 proof is 25.5% alcohol by vol. while one that is 82 proof is 41%

56. ## Physics

The diameter of the atom is proportional to n2, where n = 1 labels the lowest, or "ground" state, n = 2 is the second state, n = 3 is the third state, and so on. If the atom's diameter is 1 multiplied by 10-10 m in its lowest energy state, what is its

1. Ann Hamilton's "Indigo Blue" is an example of what kind of art? Feminist Art Action Painting x Installation Art Video Art 2 The events in contemporary Iran give this artist context for films and videos by this artist: Wemda Gu x Shirin Neshat Zaha Hadid

58. ## World History

How has the nature and technology of warfare evolved,from earliest times to 1500CE?

59. ## Physics

A force (in this case, water) is applied to a waterwheel that turns and lifts a small weight that is attached to a string that is attached to the waterwheel's axle. How do Newton's 3 laws of motion describe this event?

60. ## Science

What are the responsibilities of humans toward natural resources? Describe three of the environmental challenges humans face today.

61. ## History/English

I have two separate questions that I am having trouble answering... Why is Roman law often considered to be the greatest contribution of the Romans to the modern world? Also, I have to find image, style, tone, setting, and theme within the book The Hunger

62. ## Math

If the floor plan of a new building is shown the building cost \$35.00 a saqure foot to construct you need to obtain insurance for the new building .how much insure?

63. ## Science

What do the hairlike structures on a cell do? Please don't give me a link to another website. Thank you!

64. ## MATHS

Class A and Class B have the same number of pupils. The ratio of the number of boys in Class A to the number of boys in class B is 3:2. The ratio of the number of girls in Class A to the number in Class B is 3:5. Find the ratio of the number of boys to the

65. ## science

how might the shape of the hairlike structures relate to their function? Thanks.

66. ## Medical Transcription

PUNCTUATION AND CAPITALIZATION The patient has had recurring episodes of paroxysmal nocturnal dyspnea and 3 pillow orthopnea. Associated symptoms such as lightheadedness, breathlessness, and exertional dyspnea occur during daytime hours. Is this statement

find p(9,4)

68. ## writing a paragraph

how to apply for a spcific job

69. ## MATHs

The three terms x+12, 3x+5 and 2x+25 are the first three terms of an arithmetic progression. What is the value of x?

70. ## Maths

What is the sum of all real solutions to the equation x−6/4=−2/x?

71. ## English

A hypothetical example is: A. a false example. B. not real but can happen. C. an example used to prove a hypothesis. D. has no place in a speech. is it B

72. ## chemistry

what is the mass of sodium nitrate (85.00g/mol) that releases 2.55L of gas at STP?

73. ## Discrete Math

For sets A, B, C is a subset of U, prove or disprove (with a counter-example) the following: If A is a subset of B, B is not a subset of C, then A is not a subset of C,

74. ## Chemistry

What kind of energy is primarily used to bring electricity to remote areas that are far from power lines? A. Kerosene B. Batteries C.Solar electric units D. Electrical network

75. ## Maths

Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|

76. ## science

Calculate the work done by lifting a stack of books 0.5 m onto a table. The force you exerted eas 150N. Please help I am lost as how to do this

78. ## Maths

Let f(x)=2x^2+40x+25. Given that f(x) leaves the same remainder when divided by x−a as when divided by x+2a for a positive integer a, what is the value of a?

79. ## math

Ricky is 5 years older than Sara. Three years ago he was twice her age. How old is Ricky? Thanks for the help!

80. ## computer

create a QBASIC program using DO WHILE LOOP

81. ## Algebra Binomial Theorem

Hi, can somebody help me with this math problem I am stuck on? How do I use binomial theorem to expand(2x – 5y)^3. I need to show my word so any help you can provide would be greatly appreciated.

82. ## computer

the meanings of this QBASIC WORD • FOR- • DO - • SELECT- • MID\$- • ASC- • SQR- • LEN- • LEFT\$- • TIME\$- • INT-

83. ## college math

A quantity, W, is directly proportional to X and the square Y, and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and Z= 6? Give answer to 3 decimal places. Thanks in advance! I appreciate all the

84. ## physics

For a long straight wire, carrying a current of 20 A. A rectangular coil 5 x 10 cm2 is 2 cm apart. The coil carries a current of 5 A. a) determining the force acting on each segment of the rectangular coil. b) What is the net force on the coil?

85. ## Science

How do the oceans support life? How have the oceans and their marine life changed through time?

86. ## Life Orientation

What are the Three (3) enviromental health hazards that cause ill health,crises, and or disasters within south africa and globally

87. ## english/writing

how can i reword this sentence differently and better? it sounds wrong to me. In conclusion, The Scarlet Letter is a transcendentalist novel of the strength of individual character.

88. ## Statistics

If you draw two clubs on two consecutive draws from a standard deck of cards you win \$660 otherwise you pay me \$40

89. ## science

What are the large- and small- scale causes of climate and weather?

90. ## chemistry

draw particle diagrams that account for the fact that 2 volumes of nitric oxide gas react with 1 volume of oxygen gas to form 2 volumes of product with no leftover gas

91. ## History pls help

Which of the following nineteenth-century inventors is associated with Menlo park in New jersey A. Alexander Graham Bell B. Thomas Alva Edison C. Cyrus W. Field D. Gustavus F. Swift

92. ## algebra

one inch is about 2.254 centimeters .A puzzle has a length of 28 centimeters .What is the length of the puzzle in inches ,rounded to the nearest tenth of an inch

93. ## chemistry

If your equation of the line for you SAM analysis is y=1x+0.3980, what is the concentration of Mg in ppm in your unknown solution?

94. ## math

A backery makes loaves of bread for \$1.40 and sells them for \$1.75 per loaf. What is the percent markup on each loaf based on cost?

95. ## physics

If a body weight 10N is lifted from the floor to a table 2m above the floor ,calculate the potential energy gained.What happens to the energy if the body falls of the table and hits the floor?

96. ## maths

5 seamstresses can make 3 shirts in 3 days so how many can 7 make in 10 days??

97. ## chemistry

If your equation of the line for you SAM analysis is y=1x+0.3436, what is the concentration of MgO in W/w% in your unknown with a mass of 0.1018?

98. ## Psychology

Professor Webb is interested in conducting a study on gender differences and coping with stress. He should begin his research by examining:

99. ## algebra

One car travels 105 miles in the same amount of time it takes a second car traveling 6 miles per hour slower than the first to go 87 miles. What are the speeds of the cars?

100. ## History

in 1866 Chief cloud ambushed and massacre Union soldiers the massacre was named what A. Little big horn B.Wounded Knee C.Fetterman D. Chivrington

101. ## math

it takes 7 men 10 days to build a garage.Halfway through building the garage they get some help from 3 people and continue to work at the same rate a)How long will it take to finish of the garage b)How long did it take

102. ## math

Jose, Paul,and Dan went fishing. It was a good day, and all three of them caught a fish. Dan's fish weighed four times as much as Paul's fish, and Jose's fish weighed half as much as Dan's fish. Altogether, the three fish weighed 21 pounds. How much did

103. ## Geometry

How many three digit numbers have three distinct digits?

104. ## Math

Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?

105. ## Simple Math

Please explain to me what I need to do . A cable 35 feet long runs from the top of a utility pole to a point on the ground 30 feet from the base of the pole. How tall is the utility pole ?

106. ## ap calculus

a particle moves along the x axis in such a way that its acceleration at time t, t>0 , is given by x(t)= (ln x)^2. at what value of t does the velocity of the particle attain its maximum

107. ## maths-

In parabola, give any example of a quadratic equation which doesnot touches the x-axis and y-axis

108. ## Psychology

The weather person on the evening news reports that the average daily rainfall for the last six months is 10 inches. A farmer is trying to determine how the rain might affect his crops.

109. ## math

tom,jack and joe are the fastest runners in the school.if they race one another,without dead heats,how many combinations can they finish in if they occupy the first 3 places ?

110. ## Geometry

ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?

111. ## college math

It takes Mike 8 minutes to walk to the store from his house. The return trip takes 13 minutes because he walks 1mph slower due to the bags he is carrying. How fast did Mike walk on his way to the store? Carry out one decimal place. Thanks in advance!

112. ## chemistry

Calculate the concentrations of all species present C6H5N2, C6H5NH3+ OH^-, and H3O^+}) in a 0.14 M solution of aniline.

113. ## science

What may be some long-term effects of human interactions with the oceanic environments?

114. ## math

row a;1,2,3,4,5............................rowb;1,2,4,8,16...........................row c;2,4,7,12,21.........................what is the first entry in row c which is greater than 100 is most likely to be ?

115. ## FINANCE

Pls explain and prodive a resource to fine equation. Computing interest tax savings.Dharma Supply has earnings before interest and taxes (EBIT) of \$500,000, interest expenses of \$300,000, and faces a corporate tax rate of 35%. a. What is Dharma Supply’s

116. ## physics

A 2.10 m diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of 7.90 µV/m. (a) What is the intensity of this wave? W/m2? (b) What is the power received by the antenna? W? (c)

117. ## Algebra II

What is the simplified form of (1/2x^-2)^3 X^7?

118. ## History

If u were a immigrant in America at 1880 its most likely u were a- german N Lutheran b Italin N Catholic C Irish N protestant Or D Swedish n protestant

119. ## Algebra II

Given x(x) = 2x^3 - 6x^2 + 8 Rewrite the given equatin in factored form.

120. ## physics

On its highest power setting, a microwave oven increases the temperature of 0.350 kg of spaghetti by 45.0°C in 100 s. (a) What was the rate of power absorption by the spaghetti, given its specific heat is 0.900 kcal/kg·°C? W (b) Find the average

121. ## Psychology

One way to measure the validity of test would be to:

122. ## physics

A boat is traveling on a bearing of 25 degrees East of North at a speed of 4 knots (a knot is 1.852 km/h). After traveling for 3 hours, the boats heading is changed to due South and it travels for an additional 2 hours at 5 knots. Using a Vector diagram,

123. ## Algebra II

simplify (2x^-4 y^-2 / 3x^-6 y^-8)^3

124. ## chemistry

I'm trying to figure out what went wrong during my freshman chem lab. We were figuring out the enthalpy of formation of MgO(s). MgO(s) + 2H+(aq) -> Mg2+(aq) + H2O(l) dHrxn = -334.83kJ/mol Mg(s) + 2H+(aq) -> Mg2+(aq) + H2(g) dHxrn = -1105kJ/mol H2(g)+

125. ## Algebra II

Write a quartic funciton that has 2 real and 2 imaginary roots and rewrite the polynomialin standard form.

126. ## AP CHEM

A secondary alcohol results from the attachment of a hydroxy group to which carbon atom? C |

127. ## Algebra II

write a fourth degree polynomial function a leading coefficient o 1 given three of its zeros are -1, 3 and 2i, then re-write it in simplified form.

128. ## Algebra 1

A certain United States flag has a perimeter of 58 feet . The length of the flag is 9 feet longer than the width. What are the dimensions of this flag ?

129. ## Art

1.With late 20th c. sculpture a new attitude developed around the use of 'ordinary' materials. Some said that this was merely "Dadaist revival." The work may involve moving parts (kinetic sculpture), or 'combines' of seeming unrelated objects, or popular

130. ## Physics

(a) In the diagram above the small semi-circle in the wire above R_1 indicates that it is not in contact with the horizontal wire which it appears to intersect due to the 2-dimensional projection. Additionally, the horizontal wire is continuous, not

131. ## grade 6 honors math

Of 150 sixth graders choosing electives for next year, 50 signed up for theater, 65 signed up for art and 70 signed up for band. Some students did not choose an elective. Represent this information using Venn Diagrams.

132. ## cultural diversity

a speaker you over heard saying____was employing litrate style oral language.

133. ## Chemistry

A mixture of 1.39 g H2 and 1.60 g He is placed in a 1.00-L container at 27°C. Calculate the partial pressure of each gas and the total pressure. PH2 = ? atm PHe = ? atm Ptotal = ? atm Please put answer so i can compare to my answer

134. ## college math

A quantity, W, is directly proportional to x and the square of y and inversely proportional to the cube of z. W-3 when x=4,y=2 and z=4. What is the value of w, when x=5, y=5 and z=4. Give answer to three decimal places. Thanks so much!

135. ## help with chemistry

Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 67°C at 759 torr. ___g/L I got 12.7 i do not know if this is correct. Please help

136. ## Chem HW!! Difficult! HELP!

Urea (H2NCONH2) is used extensively as a nitrogen source in fertilizers. It is produced commercially from the reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g) ---Heat pressure---> H2NCONH2(s) + H2O(g) Ammonia gas at 223°C and 90. atm flows into a

137. ## early chlhood

Ms. Sue you do not know me and I do not know you. I am not a cheater because I have a lot going on in my life. My husband has stage four cancer and I am trying to finish school and also take care of my two small children. I watching my husband die in front

138. ## physics

A box is being lowered down a wall at constant speed by a girl, as shown. Her hand is pushing on the edge of the box with 50 N of force at a 45◦ angle with respect to the horizontal. The box weighs 40 N. Find the coefficient of kinetic friction between

139. ## physics

A box is being lowered down a wall at constant speed by a girl, as shown. Her hand is pushing on the edge of the box with 50 N of force at a 45◦ angle with respect to the horizontal. The box weighs 40 N. Find the coefficient of kinetic friction between

140. ## physics

A person pushes with force F on a box which remains at rest on a rough floor as shown in the top figure. The bottom figures illustrates all the force acting on the box. a) What condition must be satisfied by all the force acting on the box so that it

141. ## World Geography

REVIEW Which ecosystem usually supports thick forests of deciduous trees? A. Tropical forest B. Temperate forest C. Savanna

142. ## Math

Justin rides his bike in a rectangular route. He knows the total distance is 6,188 yards and the length of the shorter side of the route is 741 yards. What is the length of the longer side ?

143. ## World Geography

REVIWE 1.Using up resources is one of the negative effects of A. the birth rate. B. the death rate.

144. ## Math

A certain United States flag has a perimeter of 58 feet . The length of the flag is 9 feet longer than the width . What are the dimensions of this flag?

145. ## World Geography

REVIEW 1.____________ spread cultural traits because they bring cultural traditions with them to their new homeland. A. Traders B. Explorers

146. ## FRM 121 Fashion History II

How can I find Fashion Period Report Victorian and Bustle Era Society and Fashion?

147. ## chemistry

A solution is made by dissolving 0.10 mole of Na2SO4 in water to a final volume of 1.00 L. What is the molar concentration of Na+ ions in the solution?

148. ## Math

Solve 3cosx+1=2secx

149. ## World Geography

REVIEW 1.An area in which a single culture or cultural trait is dominant is called a ____________. A. culture B. cultural landscape

150. ## building science

how do we calculate the equilibrant if the upward force is 450N and the downward force is 750N acting on the same line?

151. ## math

a railway train 100 m long is runing at the speed of 50km/hour in what time will it pass pole near the line?

152. ## World Geography

REVIEW 1.Demographers are scientists who study A. weather and climate. B. pollution.

153. ## math

a railway train 100 m long is runing at the speed of 50km/hour in what time will it pass pole near the line?

154. ## math

a railway train 100m long is runing at the speed of 50km/hour in what time will it pass pole near the line

155. ## math

make out a bill for 4 new car tyres at k54.75 each?

156. ## Math

I need 120 pieces of wire that are 18 inches long. How much wire should I buy? Thanks!

157. ## physics

a circular plastic dish of radious 2 cm is floating in a bucket of water. A small iron block is placed gently in it. It sink by 1cm find the mass of the block

158. ## Chem

Use a chemical equation to help explain why the pH of an aqueous solution changes after HCl solution has been added This is what I got HCL + H2O = H30+ plus CL- Hope that makes since (those are a positive and negative signs at the right side of the

159. ## economics

the south African government is not providing enough welfare or subsidies to the poor and underpriviledged. what are the cost and consequences of providing the subsidies and welfare?

160. ## math

PROCESSING CLAIMS. Joe takes x hours on the average to process a claim. whereas Ellen's average is 1 hour longer. a) write a rational function C(x) that gives the number of claims that they process while working for an 8-hour shift. b) Find C(c)

161. ## Math

I have some white and black marbles in a box. There are 30 white marbles. There are 14 more white marbles than black marbles. How many black marbles do I have?

162. ## Physics

A long coaxial cable consists of two concentric conductors. The inner conductor is a cylinder with radius R_1, and it carries a current I_0 uniformly distributed over its cross section. The outer conductor is a cylindrical shell with inner radius R_2 and

163. ## World Geography

REVIEW 1.Which of the following statements about the natural resources of the United States is most accurate? A. The many agricultural resources of the United States have made up for its lack of other resources.

164. ## Life orientation

Identify and discribe 3 environmental health hazards that cause ill health

165. ## History

Who was the first president

166. ## Algebra II

I do not understand what this is asking me to do. I've several different ways and I do not feel comfortable with my answer. n^3 -5n^2 -2n +24 =0 Any guidance would be so helpful

167. ## World Geography

REVIEW 1.Canada currently ranks first in the world in which category? A. Total number of Internet users B. Percentage of college and university graduates

168. ## Government senior college ikoyi

An equilateral triangle of side 20cm is inscribed in a circle.calculate the distances of a side of the triangle from the centre of the circle.

169. ## Maths

How many ordered quadruples of distinct positive integers (a,b,c,d) are there such that 1/a+1/b+1/c+1/d=1?

170. ## World Geography

REVIEW 1.Which of the following has made American culture more accessible to the rest of the world? A. Scientific Research B. Imports C. The Internet D. Immigration

171. ## chemistry

a certain a digestive reaction, performed at optimum temperature and pH takes 10 minutes to reach completion when performed in the absence of the associated catalyst. How many minutes would the same reaction require if an enzyme that increase the reaction

172. ## Discrete Math

Let n be positive integer greater than 1. We call n prime if the only positive integers that (exactly) divide n are 1 and n itself. For example, the first seven primes are 2, 3, 5, 7, 11, 13 and 17. (We should learn more about primes in Chapter 4.) Use the

173. ## Math

I am having trouble finding an article that incorporates research of confidence intervals to market a new product. I will need to Summarize the information and suggest if is it wise to go ahead and market the product. Do you any suggestions on a article I

174. ## math

Able starts off counting at 13, and counts by 7. What is the 11th number that Able will say?

175. ## World Geography

REVIEW 1.Which of the following was one cause of the Civil War in the United States? A. The South wanted new states to allow slavery and the North did not. B. The North wanted new states to allow slavery and the South did not. C. The North opposed signing

176. ## World Geography

REVIEW 1.What natural resource most attracted European traders to Canada? A. Timber

177. ## World Geography

REVIEW 1.Which of Canada’s regions has limited vegetation and freezing temperatures most of the year? A. Maritime B. Subarctic C. Tundra

178. ## MATH

a baseball team has 15 members, 3 of whom always play and bat at the top of the batting order. For the game Sunday, the starting lineup of nine players will be filed out from the remaining members and a batting order will be set. How many possible betting

179. ## math

What is the largest possible integer that can be chosen as one of five distinct positive integers whose average is 10?

180. ## World Geography

REVIEW 1.The forests of the Pacific Northwest are just one of the many different ______________ in the United States where many people work in the same industry. A. elevation regions B. political regions C. climate regions

181. ## math

Let f(x)=2x2+40x+25. Given that f(x) leaves the same remainder when divided by x−a as when divided by x+2a for a positive integer a, what is the value of a?

182. ## math

Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|

183. ## World Geography

REVIEW 1.Where is the majority of Canada’s oil found? A. Along the Atlantic Coast B. Along the border with the United States C. In western Canada

184. ## World Geography

REVIEW 1.In what ways did immigrants contribute to American society in the early 1900s? A. They increased the defensive power of the United States. B. They worked in factories, built railroads, and opened businesses. C. The took political power in most

185. ## Math

Please help me with this problem: A bourbon that is 51 proof is 25.5% alcohol by volume while one that is 82 proof is 41% alcohol. How many liters of 51 proof bourbon must be mixed with 1.0 L of 82 proof bourbon to produce a 66 proof bourbon? Give answer

186. ## Chemistry

What is the theoretical mass of the products in the double displacement reaction: CaCl2 (aq) + Na2CO3 (aq) → 2NaCl (aq) +CaCO3 (aq)

187. ## PHYSICS

A baseball of mass 148g is travelling at 35.0m/s [E] collides with a baseball bat. the collision lasts for 1.10ms. After the collision, the baseball travels at 52m/s [W]. What is the force of the bat on the baseball

188. ## PHYSICS

Max is throwing a 57g tennis ball upward and hitting it (with a racket) when it reaches the top of its flight. If the racket exerts an average force of 440N on the ball, find the speed of the ball after the collision (if they are in contact for 4.5ms)

189. ## Algebra

The area of a square is 40 in². If the length of each side of the square is 2x in., what is the value of x?

190. ## FINANCE

Pls explain and prodive a resource to fine equation. Computing interest tax savings.Dharma Supply has earnings before interest and taxes (EBIT) of \$500,000, interest expenses of \$300,000, and faces a corporate tax rate of 35%. a. What is Dharma Supply’s

191. ## Math

please help!!!!Apply newtons method to approximate the x-values of the indicated points of intersection of the 2 graphs. continue the process until 2 successive approximations differ by less than 0.001. (Hint: Let h(x)=f(x)-g(x)) f(x)=x^6 g(x)=cos(x) 1)x=

192. ## Quantative Reasoning College Freshman

Using the formula y=-16t^2+vt+h help me with this word problem : A firework rocket is fired straight up into the air with an initial velocity of v=192ft/sec From the top of an apartment building h=48ft off the ground. The firework will explode when it

193. ## Quantitative Reasoning ( College Freshman)

For the quadratic function : y=-0.25(x+8)(x-6) write the function in the vertex form y=a(x-h)^2+k by completing the square. Show all work.

194. ## maths-

Find the area of triangle . in a right-angled triangle, the length of the hypotenuse is 65 cm

195. ## math

i am less than a hundred the sum of my digits is seventeen i am an even number

196. ## Maths

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

197. ## maths

In parabola, give any example of a quadratic equation which doesnot touches the x-axis only.

198. ## Maths

An aeroplane flies due north for 200 km and then turns due east and flies for a further distance of 325km. Find the bearing,to the nearest degree,of the aeroplane from its starting point.

199. ## maths-

The remainder obtained by dividing x^2 -3kx +2 by ( x+2) is twice the remainder obtained by dividing x^2 +3x –k by ( x+3). Find the value of k

200. ## physics

A 50kg gun mounted on wheels shoots a 3kg missile directed at an angle of 30 with a horizontal.if the muzzle velocity of missile is 550m/s what is the horizontal recoil velocity of the gun.

201. ## maths

An airplane is flying at an altitude of 10,000m. The pilot sees two ships A and B. Ship A is due south of P and 22.5km away (in a direct line).Likewise ship B is due East and 40.8km from P. Find the distance between the two ships.

202. ## maths

Using the complementary angle ratio results,find the value of x for the following. (a) cos(x+35)degree=sin x degree (b) sec x degree=cosec(x+20)degree

203. ## social studies

19. Identify two problems resulting from urban sprawl in the western region of the United States. If these problems are not solved, what will the outcome likely be? (5 points) I don't want the answer, my question is what was the Urban Sprawl?

204. ## Electrochemistry

Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

205. ## Math

A scientist is mixing a chemical solution for an experiment. The solution contains 3/8 ounce of a chemical and 1/6 ounce saline solution. What is the unit rate of chemical to saline solution?

206. ## maths

From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The base is 200m. Find the height of the flag pole.

207. ## maths

From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The base is 200m. Find the height of the flag pole.

208. ## Maths

How many ordered quadruples of distinct positive integers (a,b,c,d) are there such that 1/a+1/b+1/c+1/d=1?

209. ## computer science

draw a level 0 diagram as well as a context diagram for the following scenario When renting a car from Banz Car Rental Agency, persons renting a car from the agency will be given a brochure of the type of vehicle, insurance on vehicle and the rental

210. ## Calculus 3

Let G be the region in the first octant that is inside both the cylinders x^2+y^2=1 and y^2+z^2=1. Use a triple integral to evaluate the volume of G.

211. ## epidemiology

) In a recently published article authors reported on their research examining the effectiveness of compound C-4277, an anti-viral agent. This agent was tested to determine its impact on rhinoviruses, which are the leading cause of common colds. The

212. ## Maths

Find all the values of theta between 0 degree and 360 degree, and state the quadrants in which they exist. (a)cos theta=-0.71 (b)tan theta=1.732

213. ## math

what is 25.515 rounded to the nearest cent?

214. ## algebra 1

suppose xitlali can paint 6 rooms in 12 hours and alicia takes eight hours. how long would it take the two painters together to paint the 6 rooms?

215. ## Accounting

How would the journal entry look if you sold a 8% bond with a face value of \$11,000 for \$9,500? Bond will mature in 10 years.

216. ## epidemiology

In a study examining associations between level of education and response to the Philadelphia Public Health Department’s emergency messages to “shelter in place” (meaning stay in your home) following an accidental release of chemicals from the Sunoco

217. ## math

If Deborah ate five pieces of a pizza that was cut into 16 pieces, what percentage of the pizza did she eat?

218. ## Life orantation

Discuss 5 ways in which the human or environmental problem impacts on the community.provide relevant sources to support your claims

219. ## Physic

How much work W is required to accelerat a 1000kg object from initial velocity of 100m/s to a final velocity of 200m/s?

220. ## Physics

Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.28 mm (2.80 10-4 m). A screen is located 2.7 m from the double slit. At what distance from the center of the screen will the first bright fringe beyond the

221. ## pre-calc

one to one property, 3^x-4=1/27 Need help do not understand

222. ## math

If gasoline costs \$0.42 a liter, approximately how much will it cost to fill a 40 gallon tank?

223. ## math

1) A rancher wants to enclose two rectangular areas near a river, one for sheep and one for cattle. There is 240m of fencing available. Express the area of the enclosures as a function of its dimension. 2) A container company is designing on open-top,

224. ## Math

Tom has some baseball cards and football cards. He had four times as many football cards than baseball cards. He has 12 football cards. How many baseball cards does Tom have?

225. ## Math

Mike had some pieces of wood to build a doghouse. He cut each piece in fourths. Then he had 24 pieces of wood. How many whole pieces of wood did Mike have to start with?

f(x)= X-5 +2

227. ## mathematics

the cross section of a solid in the form of a cone of height h, and a hemispherical bowl of radius r. the volume of the hemispherical portion is half that of the conical portion. calculate: 1)the ratio r:h 2)the vertical angle of the cone, correct to the

228. ## math

what sum will amount to rs 1116 in 4 years at 6%p.a.?

229. ## chemistry

how do I determine the total charge of Asn-Tyr-Asp with a pH 7.4

230. ## math

in what time a certain sum will become 3 1/4 time at 5%?

231. ## epidemiology

Let’s say you are a health policy expert and you are sitting in your office and you receive a phone call from a news reporter. The reporter asks you to comment for a story she is writing. She has learned from the chief of neurosurgery at Cooper

232. ## math

at what rate of interest a certain sum will be doubled in 8 year?

233. ## math

a man walks a distance 2 1/2 km in 30 minutes what is his speed in km/hours?

234. ## math

Factor the following polynomials. (1 point each) 9. 3x2 – 12 10. 5x3y + 35x2y + 45xy