# Questions Asked onMarch 30, 2013

1. ## Statistics

39% of adults say cashews are their favorite kind of nut. You randomly select 12 adults and ask each to name their favvorite kind of nut. Find the probability that the number who say cashews are thrie favorite nutis (a)exactly three, (b) at least four, (c)

2. ## chemistry

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?

3. ## maths

prove that : 3^-3 * 6^2 * root 98 / 5^2 * cube root 1/25 * 15^-4/3 *3^1/3 is equal to 28 root 2

4. ## electronic,physical,science

A circuit that combines two or more signals is called a mixer. In this lab, your goal is to build a mixer that combines the signals generated by two voltage sources, V1 and V2, where: V1 is a 1 kHz square wave that varies between 0V and +1V, and V2 is a 5

5. ## Analytical Chemistry

Current is applied to an aqueous solution of calcium sulfide. Multiple choice help please??! What is produced at the cathode? A) H2(g) B) S(s) C) O2(g) D) Ca(s) What is produced at the anode? A) O2(g) B) H2(g) C) Ca(s) D) S(s)

6. ## statistics

A simple random sample size of n = 150 is obtained from a population whose size is N = 20,000 and whose population proportion with a specified characteristic is p = 0.6. What is the probability of obtaining x = 96 or more individuals with the

7. ## Physics

Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (B = 4q and C = 6.5q. Let the +x-axis be pointing

8. ## 7th Grade Social Studies!!

Quick question- 1) All of the following contributed to the Spanish victory over the Aztecs except (1 point) disease wiped out many of the Aztecs. native Americans in the region resented paying tribute to the Aztecs. the Spanish had horses and superior

9. ## 7th Grade Social Studies

1. Mexico's Central Plateau is an important region because (1 point) it is a mountainous region where few people live, but minerals are mined. most of the country's people live there. it is a place where active volcanoes and earthquakes make life

10. ## Physics

Three point charges are placed at the following points on the x- axis;+2uc at x=0,-3uc at x=40cm,-5uc at x=120cm.find the force on the -5uc charge.

11. ## Electronics

Two electronics technicians are discussing electronic components. Technician A says that electronic components are color-coded to indicate their electrical values. Technician B says that electronic components are color-coded to indicate their power

12. ## cHEMISTY

If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate

13. ## english

Speech criticism is a simpler form of: A. speech evaluation. B. rhetorical criticism. C. panel judging. D. communication process. is it B 2. You are evaluating this when you are looking for a clear, compelling message. A. Use of quotes B. Structure C.

14. ## calculus optimization problem

A farmer has 460 feet of fencing with which to enclose a rectangular grazing pen next to a barn. The farmer will use the barn as one side of the pen, and will use the fencing for the other three sides. find the dimension of the pen with the maximum area?

15. ## Chemistry

10.0 mL of a 0.300M NH3 solution is titrated with a 0.100M HCl solution. Calculate the pH after the following additions of HCl. 0.00mL 10.00mL 30.00mL 40.00mL

16. ## chemistry

why is the head temperature kept below 90 c in the initial step of the dehydration reaction?

17. ## math

the total length of 4 blue banners and 5 yellow banners is 49 meters. the total length of 2 blue banners and 1 yellow banner is 17 meters all banners of the same color have the same length. find the length of each blue banner.

18. ## Physics

The caber toss is a traditional Scottish sport that involves hurling a caber, which is essentially a large piece of a tree: a caber is a 6 m long, 80 kg tree trunk. Large strong people hurl these and the goal is to get the caber to land as far away as

19. ## Physics

Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (B = 4q and C = 6.5q. Let the +x-axis be pointing

20. ## maths

what is the answer of add 2/3 and the reciprocal of 4/5

21. ## Math

Ray wanted to put his tomato plants in rows with the same numbers of plants in each row. He knew that if he planted 5,6, or 7 rows of tomatoes, he would have at least one plant left over. However, his plants could be placed evenly in 8 rows. Which of the

22. ## CHM1045

NH4NO3(s) right arrow NH4+(aq) + NO3−(aq) In order to measure the enthalpy change for this reaction, 1.21 g of NH4NO3 is dissolved in enough water to make 25.0 mL of solution. The initial temperature is 25.8°C and the final temperature (after the solid

23. ## chemistry

LP gas burns according to the exothermic reaction: C3H8(g) + 5 O2(g) right arrow 3 CO2(g) + 4 H2O(g) ΔHrxn° = −2044 kJ What mass of LP gas is necessary to heat 1.2 L of water from room temperature (25.0°C) to boiling (100.0°C)? Assume that during

24. ## math

the actual sales for the last four years have been 24 units,30units,23units and 27 units what is the average number of units you can expect to sell next month?

25. ## math

the total length of 4 blue banners and 5 yellow banners is 49 meters. the total length of 2 blue banners and 1 yellow banner is 17 meters all banners of the same color have the same length. find the length of each blue banner.

26. ## mathematics

In how many ways can the letters of MAHABHARAT be arranged so that i) B n T are never together ii) M,A,T n H occurs at first four places

27. ## math

A(4,7) and B(-3,2) are points on a coordinate plane.Find the coordinates of a point C on the x-axis such that AC=BC .

28. ## English Holiday

I'd like to know about Red Nose Day in the UK. 1. Do only British people have Red Nose Day? 2. Do all students go to school wearing a red nose? 3. Is Red Nose Day held every other year? 4. Some more information related Red Nose Day and related websites are

29. ## Chemistry

What are some equilibrium expressions that chemists use for weak acid equilibrium?

30. ## Managerail Economics

After Iraq invaded Kuwait gasoline prices rose dramatically – up to 50%. These were many effects of the increased price of gasoline. Explain the following effects in terms of the income effect, or the substitution effect, or both effects. a)People drove

31. ## Grade 12 Life orientation

Critically discuss 5 ways in which lifestyle/behaviour substance of both legal and illegal drugs impact on the teenagers?

32. ## math

estimate of 6/10 + 7/12

33. ## Physics

The load-bearing piston in a certain hydraulic system has an area 35 times as large as the input piston. If the larger piston supports a load of 9000 N, how large a force must be applied to the input piston?

34. ## chem

Check the correct statements for the above reaction. Choose at least one answer. a. The reaction is exothermic. b. The reaction is endothermic. c. The change in entropy is positive. d. The change in entropy is negative. e. The reaction is at equilibrium.

35. ## Quantitative Analysis

Using Equations Word-process the following five equations: Using Drawing Tool

36. ## Calculus 3

The following parametric equations describe a portion of a shperical surface: x=4cosusinv y=4sinusinv z=4cosv where 0

37. ## math

howard has 3 m of ribbon. how many centimeters is that

38. ## Math

53 baskets were scored at the game. Jimmy scored 5 less than Trent. Trent and Justin scored the same amount. Evan scored ten more baskets than Trent. How many baskets did each boy get? Use algebra. please help, thanx:)

1. Which of the following is an example of a dependent event? (1 point) flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream choosing a cookie at random, eating it, and then choosing another at random 2. Which of

40. ## Math 112 Help hard one

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? There are many answers. See if you can find more than one.

41. ## English

A type of selective listening that tunes out communication that is different from our views or does not interest us is selective: A. perception. B. focusing. C. screening. D. responding. im confused between b and C

42. ## Math

A circle has a radius that increases at a rate of 10cm/s. Find the eaaquation of the outermost circle 6 seconds after it starts to expand.

43. ## Math

A circle has a radius that increases at a rate of 10cm/s. Find the equation of the outermost circle 6 seconds after it starts to expand. Using x2 +y2=r2

44. ## Math

A circle has a radius that increases at a rate of 10cm/s. Find the equation of the outermost circle 6 seconds after it starts to expand. Using x2 +y2=r2

45. ## Algebra

Linear equation x in - solve for x in the following equation : [(6x-7)/4] + [(3x-5)/7]

46. ## statistics

Want to find if students who are musicians have higher Iq test scores than the general population. the researcher predicts that playing music is associated with higher IQ scores. the researcher selects a sample of 75 musicians from area and gives them an

47. ## t-test

For a single-sample t-test the t(17) = 2.90, p

1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?

49. ## math

the library has a total collection of 2630 books. the number of non-fiction books is 240 fewer than the number of fiction books but 190 more than the number of picture books. how many books of each type are there in the library?

50. ## math

the total length of 4 blue banners and 5 yellow banners is 49 meters. the total length of 2 blue banners and 1 yellow banner is 17 meters all banners of the same color have the same length. find the length of each blue banner.

51. ## Livingston High

\$287.44 APR 12% FINANCE CHARGE \$2.87 WHATS THE ACCOUNT BALANCE?

52. ## math

anne, ryan and joel collect empty cans for recycling. they collect a total of 1925 cans. anne collects half as many cans as ryan. joel collects twice as many cans as ryan. how many cans does joel collect?

53. ## Physocology

From chapter 9 "the Humanities through the Arts" use the three different criticisms on one of the key perceptions.

54. ## English

I have to write an essay, so I chose to write about "The Big Bang Theory" or explosion that formed the universe. I don't know what should I put for my body paragraphs or what should I talk about. Please help! I need at least three body paragraphs what

55. ## MATH

anne, ryan and joel collect empty cans for recycling. they collect a total of 1925 cans. anne collects half as many cans as ryan. joel collects twice as many cans as ryan. how many cans does joel collect?

56. ## Chemistry

Calculate the molar mass of a diprotic acid. It reaches the endpoint of the titration with NaOH at 28ml. The initial concentration of NaOH is 0.09792. and the initial mass of the diprotic acid is 0.685g. I keep getting a molar mass of 500g/mol. but the

57. ## Chemistry

Calculate the molar mass of a diprotic acid. It reaches the endpoint of the titration with NaOH at 28ml. The initial concentration of NaOH is 0.09792. and the initial mass of the diprotic acid is 0.685g. I keep getting a molar mass of 500g/mol. but the

58. ## Algebra

Matt ate a total of 100 raisins over a five day period. Each day he ate six more raisins than the previous day. How many did he eat the first day?

an attempt to minimize the problem of wage-rate compression, organizations may incorporate all of the following ideas except: Answer giving larger increases to high-performance employees. preparing high-performance employees for promotion to high- salary

60. ## math

How do you solve systems of inequalities in two variables?

61. ## math

You and a friend go biking. You bike 12 miles north and 2 miles east. What is the straight-line distance from your starting point? Round answer to the nearest hundredths

62. ## algebra

directions Write a system of inequalities for the shaded region described. The shaded region is a rectangle with vertices at (2,1)(2,4)(6,4)

63. ## math

A company had sales of 500,000 in 1996 and sales of 720,000 in 1998. Use the midpoint formula to to find the company's sales in 1997.

64. ## math

the library has a total collection of 2630 books. the number of non-fiction books is 240 fewer than the number of fiction books but 190 more than the number of picture books. how many books of each type are there in the library?

65. ## math

if the perimeter of rectangle is 50cm and its length is 5 cm greater than its breadth find its area please give answers with method

66. ## math

A company had sales of 500,000 in 1996 and sales of 720,000 in 1998. Use the midpoint formula to to find the company's sales in 1997.

67. ## Biochemistry

Amylase is secreted by your pancreas into your small intestine where amylase helps you digest the starches in your diet. Amylase does this because it is an enzyme, a protein that catalyzes a chemical reaction. In this case, amylase catalyzes the breakdown,

68. ## Math

If a scale has a 1.5% margin of error and the scale shows a weight of 40, What is the range of possible actual weights of the object measured? I did 1.5 over 100 = x over 40 and got .6 so my answer is 39.4lbs to 40.6lbs.

69. ## physics

A pail with water (mass = 15 kg) is raised using a pulley system, if the pail accelerates upward at a rate of 1.45 m/s2, how much is the tension on the rope?

70. ## paralegal

what should you do in writing a memorandum?

71. ## Physics

A particle P of mass m kg is attached to two fixed points A and B by two identical model springs, each of stiffness k and natural length lo. The point A is at a height 1/4lo above the point B. The particle is free to oscillate vertically under gravity. The

The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s)|H2(g,1atm)|H+(aq,?M)||Cu^2+(aq,1.0M)|Cu(s) what is the pH of the solution if Ecell is 375 mV? I first got .65 as my pH, but it said

73. ## math

If I need \$25,000 in 4 years. Waht amount must i invest today if the investment earns 12% compounded semiannualy?

74. ## math

If a company issues bonds with a face value of \$1000, a coupon rate of 7%, and that will mature in 10 years. The current market yield is 10%. if the bonds pay interest semiannually, what is the value of the bonds? please he;p with the formula?

75. ## Intro to Logic

10. A strongly supported claim in science should be regarded as

76. ## math

Mr. Jacob is 55 years old and Tony is7 years old. in how many years will mr. Jacob be 4 times as old as tony?

77. ## math

theta is a first quadrant angle in standard position and cos theta = 1/(sqrt10) . Find the exact value of sin theta,

78. ## life orientation

critically discuss 10 ways in which the environmental health hazard can impact negatively on one's health

79. ## math

At a dinner 1/6 of an apple pie is severed each time it is ordered. How many total apple pies would be served if apple pie was ordered 30 times in one day? A.5

80. ## math

The line segment joining P(-6,7) and Q(5,-2) intersects the y-axis at the point R.Find the coordinates of R.

81. ## math

That is not the only option it is A.5 B.6 C.10 D.180

82. ## math

the library has a total collection of 2630 books. the number of non-fiction books is 240 fewer than the number of fiction books but 190 more than the number of picture books. how many books of each type are there in the library?

83. ## math

Mr. Jacob is 55 years old and Tony is 7 years old. in how many years will mr. Jacob be 4 times as old as tony?

84. ## Physics

An electron is accelerated through 2300 V from rest and then enters a uniform 1.90 T magnetic field. (a) What is the maximum value of the magnetic force this charge can experience? (b) What is the minimum value this charge can experience?

85. ## math

Another: theta is a second quadrant angle in standard position and tan theta = - (sqrt5)/(2) . Find the exact value of cos theta.

86. ## Chemistry

What are some equilibrium expressions that chemists use for weak acid equilibrium?

87. ## math

theta is an angle in standard position with a domain of 0 degrees < theta < 350 degrees and cot theta = -(24)/(7). Find all possible values of theta (accurate to 0.1 degree if necessary).

88. ## math

there were 7 times as many marbles in box a as in box b. after joyce transferred 294 marbles from box a to box b, both boxes had the same number of marbles. how many marbles were there in box a at first?

89. ## maths

ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?

90. ## physics

Two parallel wires carry 1-A currents in unknown directions. The distance between the wires is 10-cm. What is the magnitude of the magnetic field B in Teslas at a point P located 6-cm away from the axis of one of the wires and 8-cm away from the axis of

91. ## math

Here is the height, in inches, of 10 randomly selected members of the girls' dance team and 10 randomly selected of the girls' volleyball team Based on the interquartile ranges of the two sets of data, which is a reasonable conclusion concerning heights of

92. ## physics

A current I=1A flows along a thin-walled cylinder of radius R=4cm. What pressure in Pascals do the walls of the cylinder experience? Assume that the current is uniformly distributed. Bonus thing to think about: Is this pressure directed inwards or

93. ## math

A family refers to a group of two or more people related by birth, marriage, or adoption who reside together. In 2000, in Country A, the average family net worth was \$230,000, and there were about 7.2*10 to the seventh power families. Calculate the total

94. ## Chemistry

What are ways in which pka values for weak acids can be experimentally determined?

95. ## western illinois

102 = 3.14 x 42.25 x h solve for h

96. ## physics

What is the average speed of the car during the first 105?

97. ## Science

What pumps blood

98. ## Chemistry

Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.

99. ## maths

ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?

100. ## Chemistry

Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.

101. ## Physics

In a typical living cell, the electric potential inside the cell is 0.070 V lower than the electric potential outside the cell. The thickness of the cell membrane is 0.10µm. What is the magnitude and direction of the electric field (E) within the cell

102. ## math

Which of the following is a formula for finding the volume of a cube? A. v=e^3, where e= the edge length B. v=(lwh)^3, wherel= length,w=width andh=height C.v=6e^2, where e=the edge length D. v=b*b, where b= the area of the base I picked A since V=s^3 or

103. ## analytical chemistry

a 0.120 ml portion of a 50.0% (w/w) KOH solution having a density of 1.50*10^3 g/l is diluted to 250 ml. What is the pH of the resulting solution?

104. ## math

The graph of y=|2x+c| passes through the points (1,2) and (0,4) . Find the value of the constant c . Sketch the graph of y=|2x+c| .

105. ## Physics

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?

106. ## math

Sketch y=|(x-1)(x-3)| and y=|x^2-4x| . I don't know how to sketch the graphs :(

107. ## Physics

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?

108. ## Information Literacy

What is the call number of the oldest copy of Ellison's Shadow and Act?

109. ## Chemistry

What are some of the equilibrium expressions that chemists use for weak acid equilibrium?

110. ## physics

A current I travels counterclockwise through a closed copper wire loop which has the shape of a rectangle with sides 'a' and 'b'. What is the magnitude of the magnetic field at the center, C, of the rectangle? Express your answer in terms of a, b, I and mu

111. ## algebra

A 120-foot-long rope is cut into 3 pieces. The first piece of rope is twice as long as the second piece of rope. The third piece of rope is three times as long as the second piece of rope. What is the length of the longest piece of rope?

112. ## life orientation

What are the two orgainizatoins that are involved in supporting noise pollution

113. ## south al

For a hypothetical normal distribution of test scores, approximately 95% fall between 38 and 62, 2.5% are below 38, and 2.5% are above 62. Given this information, (a) the mode=_____ and (b) the standard deviation=_____.

114. ## algebra

\$3100 invested on July 19,1991 at 15% interest. What is the value in this account on March 30, 2013?

115. ## algebra

\$3100 invested on July 19,1991 at 15% interest compounded semi-annually. What is the value in this account on March 30, 2013?

116. ## Math

Susan owns a chocolate store. She sells her chocolate by the gram and needs to compare the weights of two chocolate batches. She randomly selects 100 pieces from each batch. The distrubition of both samples are normal. Batch 1 - (Mean Weight) 56 grams

117. ## Math

Gertrude and Ernest received their typing results. The results are normal and are shown below. Types Of Errors per Page Gertude - (Mean) 10 Standard Deviation- 1 Ernest - (Mean) 10 Standard Deviation- 4 Which statement is true? A. Gertrude probably has

118. ## math

Many scholars have set some standards to judge a system for taxation for its validity. How can you decide if a tax is good or bad

119. ## maths

prove that : 3^-3 * 6^2 * root 98 divided by 5 ^2 * cube root 1/25 * 15 ^-4/3 * 3^1/3 equals to 28 root 2

120. ## early childhood education

Need help on wrting a final paper on a combination of philosiphies, theories, and concepts and demostrate how they apply to the earlychildhood classroom. The primary focus will be on the comprehensiveness of the many components that are neccassry to

121. ## Did I do this right?-Calculus

y' and y'' for x^2- xy + y^2 = 3 y'= (y-2x)/(2y-x) y'' = [(y'-2)(2y-x)] - [(2yy' - x)(y- 2x)]/ ((2x-y)^2) final answer for second derivative is: [2y^2- 5xy + 2x^2 - 2y^3 + 8xy^2 - 8x^2y/ ((2x-y)^3)] - [(4y + 2x + xy - 2x^2)/((2y-x)^2)] is this right. thank

122. ## Physics

Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 0.70 µC charge. (A = 0.70 µC, B = 6.50 µC, and C = -3.90 µC.)

123. ## Physics

A molecule of DNA (deoxyribonucleic acid) is 2.01 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.75% upon becoming charged. Determine the

124. ## MAT221

2.Use the following algebraic expressions for parts 4-6 of the discussion: a3 - b3 (a-b) (a2 +ab + b2) (b-c) ------ (2b-a)

125. ## math

evaluate the expressions below and leave them in radical form. 1. sin(pie symbol/6)csc(pie symbol/6) 2. sec(pie symbol/3)cos(pie symbol/3)+tan(pie symbol/3)cot(pie symbol/3)

126. ## algebra

a bank gives away 1 out of 5 cards evry time a client deposits. there is an equal chance of getting one of the cards. predict the number of times a client will have to make a deposit to get all five cars. which can NOT be considered a trial for the

127. ## programming

Design a class named Book that holds a stock number, author, title, price, and number of pages for a book. Include methods to set and get the values for each data ﬁeld. Also include a displayInfo() method that displays each of the Book’s data ﬁelds

128. ## grade 12 life orientation

identify and describe 3 environmental health hazards that cause ill health,crises,and disasters within your community or any other community within south africa and globally

129. ## Chemistry

Find the Qsp when 9 drops of 0.014 M Na2CO3(aq) are added to 25 mL of 0.003 M AgNO3(aq). The solubility product of Ag2CO3 is 6.2 × 10−12. Assume 20 drops per milliliter.

130. ## human body

a friend has been taking over-the-counter vitamins and minerals because he heard that some of them can boost energy levels and immune system function. he begins experiencing fever, nausea, and recurrent kidney stones. based on these symptoms, what might

131. ## College Statistics

A random variable X has a Gamma distribution with (alpha = a, beta = b). Show that P(X > 2ab) < (2/e)^a. hint: X > c is equivalent to e^Xt > e^ct

132. ## Chemistry

Solve an equilibrium problem (using an ICE table) to calculate the of each of the following solutions. .16M CH3NH3Cl

133. ## elementary stats

A binomial random variable is based on n = 28 and p = 0.7. Find x2P(x). (Give your answer correct to two decimal places.) 1

134. ## psychology

I am trying to find a good topic question and hypothesis for addiction. In my class we were asked to pick any topic related to psychology and find research to back it up. Addiction is a wide range of different behaviors and I can't seem to find a concrete

at what rate of interest compunded quaterly for 2.5 years will RS2500 amount to RS 3900