# Questions Asked onJanuary 22, 2017

1. ## Chemistry

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?

2. ## Finite math

A theater has a seating capacity of 900 and charges \$5 for children, \$7 for students, and \$9 for adults. At a certain screening with full attendance, there were half as many adults as children and students combined. The receipts totaled \$6100. How many

3. ## math

Find each product mentally show the steps you use 9 x 44

4. ## Physics

A farmer builds three sections of a fence as shown in the figure where L = 10.00 m, and gets tired. Walking straight back to where he started, how far did he go. d=? Vector on Y-axis going to origin, L/2 vector going on Positive X Axis, vector going up L

5. ## math

An investment of 25,000 earns interest at an annual rate of 8.4% compounded continuosly a. find the instantaneous rate of change of the amount in the account after years b. find the instantaneous rate of change of the amount in the account at the time the

6. ## math

Mr brown gives his class a test. The 10 girls in the class get a mean mark of 70 percent. The 15 boys in the class get a mean mark of 80 percent. Nick says that because the mean of 70 and 80 is 75 then the mean mark for the whole class in the test is 75

7. ## Chemistry

Determine the mass of CaCO3 in your TUMS tablet? The weight of the tablet was 0.013g Concentration of HCl was 0.1494 M Volume of HCl was 95 mL Concentration of NaOH was 0.1422 M The average amount it took to titrate was 2.13 mL I have determined that moles

8. ## American Government

Why do presidents prefer federal judges who tend to agree with their views?

9. ## Mathematics

Bharati borrows amount of 12,500 at 12% per annum for 3 years at SI and madhuri borrows same amount for same time period at 10% per annum compounded annually.who pays more and by how much?

10. ## chemistry

The density of diamond is 3.51g/cm^3,and the density of platinum is 21.43g/cm^3.If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders,which graduated cylinder would have the greatest volume

11. ## Math

Steven is moving to another city next weekend and wants to rent a moving truck. The rental rates for two companies in his area are shown below. Each company charges an initial fee for renting the truck, plus an additional amount per mile. Company 1: Miles:

12. ## math

Jared is scheduled to work for mc008-1.jpg of an hour at the school fair. He has already worked mc008-2.jpg of an hour. How much longer does he have to work?

13. ## behavior health

According to classical test theory, if the observed variance of a test is 50 and the true variance is 40, what is the estimated reliability of the test? a. 0.40 b. 0.50 c. 0.80 d. 0.90 I selected C for my answer 40/50 is the .80 If the correlation between

14. ## Math

1 tenth can be exchanged for ______ hundredths. I think 0 cause 1 hundredth can exchanged in to 10 tenths but 1 tenth can not go in to 100

15. ## Psychology

Projective techniques, as distinguished from other personality instruments, have usually been designed to measure the: a. Level of aggression in terms of psychodynamic theory b. More typical and superficial aspects of personality c. Client’s level of

16. ## Science

Consider the following reaction, 4 PH3(g) + 8 O2(g) → P4O10(s) + 6 H2O(g) If a container were to have 32 molecules of PH3 and 32 molecules of O2 initially, how many total molecules (reactants plus products) would be present in the container after this

17. ## Math

if two fair dice are rolled what is the probability that the total showing is more than four? Will you please explain how to do this problem? Thank you

18. ## Basic math

if tan alpha =1/3 and tan beta =1/7 prove that tan(2 alpha+beta)=45 degrees

19. ## AP Chemistry Help!!

When you light a candle, the paraffin wax soon begins to melt. Paraffin wax is a covalent compound. Can you classify the melting of the wax as a chemical change or a physical change? If so, which is it? If you cannot classify it as chemical or physical,

20. ## Social Studies

Brazil's culture reflects what unique aspect of its colonial history? A) its Roman Catholic missionary roots B) its ties to the West African slave trade C) its rule and settlement by the Portuguese D) its peaceful blending of native and European peoples

21. ## Math

How many five-card hands chosen from a standard deck contain two hearts and three spades?

22. ## chemistry

The density of diamond is 3.51 g/cm^3 and the density of platinum is 21.43g/cm^3. If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders, which graduated cylinder would have the greatest volume

23. ## science

I need to make a acrostic poem of prokaryote.

24. ## science (physic)

An expansible ballon filled with air floats on the surface of a lake with 2/3 of its volume submerged .How deep must it be sunk in the water so that it is just inequilibrium neither sinking further nor rising? It is assumed that the temperature of the

26. ## calculus

A 17- foot ladder is leaning against a wall, and begins to slide. The top of the ladder is falling at a rate of 2 feet per second at the instant that the bottom of the ladder is 8 feet from the wall. What is the rate of change of the distance between the

27. ## math

translate this sentence 44is the difference of Rita's age and 12 in an equation .

28. ## math

the signal to a speaker causes 5 amps of current .the signal level is increased to 2.5 amps. what is the gain rounded to the nearest decibel ?

29. ## Psychology

If a client has a personality disorder, it: a. Will be readily apparent in the first session b. Can be readily assessed with the NEO-PI-3 c. Will become slowly evident through recurrent themes (e.g., relationship difficulties) and through the client’s

30. ## Trigonometry

2x is a 2nd quadrant angle. In which quadrant does x/2 lie?

31. ## CHEMISTRY!!

What intermolecular forces are responsible for neoprene's stretchiness?

32. ## calculus

The mechanics at lincoln automotive are reboring a 6-in. deep cylinder to fit a new piston. The machine they are using increases the cylinder's radius 0.02 inches each second. How rapidly is the cylinder volume increasing when the bore (diameter) is 3.8

33. ## Physis

Figure (a) shows a red car and a green car that move toward each other. Figure (b) is a graph of their motion, showing the positions xg0 = 270 m and xr0 = -35 m at time t = 0. The green car has a constant speed of 24 m/s and the red car begins from rest.

34. ## chem

Assuming complete dissociation, what is the molality of an aqueous solution of KBr whose freezing point is -2.95 ∘C? The molal freezing-point-depression constant of water is 1.86 (∘C⋅kg)/mol. Molality = m

35. ## calculus

Melissa wants to make a rectangular box with a square base and cover its top and bottom faces with velvet, which will cost her \$3 per square inch, and the sides with silk, which will cost her \$5 per square inch. The box should have a volume of 1600 cubic

36. ## Social Studies

You work for President Lula's government. You are most likely to support A) tax cuts for corporations.**** B) privatization of industry C) redirection of oil wealth to provide social services. D) budget cuts to education and health care

37. ## Math

A tennis racket is marked up 50% to \$36.75 what is the original price?

38. ## Math

At the beginning of soccer practice a water cooler contained 5 gallons of water. At the end of practice the water cooler is only 1/4 full. How many gallons of water are in the cooler at the end of practice? Explain

39. ## Chemistry

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr? I am coming out with 443torr, but the listed options are 80.0

40. ## algebra

Enter the ratio as a fraction in lowest terms 5 ft. to 26 inches

41. ## chemistry

if you burned 3.0 g of magnesium and produced 5.0 g of product how much oxygen gas was used ?

42. ## Chemistry

Need help with my last question! Given the following reaction: 2NH3 (g) + 5F2 (g) ---> N2F4 (g) + 6HF (g) If 4.00 g of NH3 and 14.0 g of F2 are allowed to react, how many grams of HF can be produced?

43. ## Math

the area of a rectangle is given by the expression (x^3+7x^2+11x+2) in^2. The length of the rectangle is given by the expression (x+2) in. What is an expression for the width of the rectangle?

44. ## Physics

Two alpha particles (helium nuclei), each consisting of two protons and two neu- trons, have an electrical potential energy of 6.08×10−19 J. What is the distance between these par- ticles at this time? The Coulomb constant is 8.98755 × 109 N · m2/C2,

45. ## science

A bullet of mass 40g strikes a stationary wooden block of mass 6kg horizontally at 500m/s the bullet goes through the block,and emerges from from the other side at 200m/s.calculate the velocity of the block once the bullet emerges from it

46. ## Chem 112

Consider the following reaction: Zn (s) + 2HCl (aq) ---> ZnCl2 (g) + H2 (g) If the reaction has a 68.4% yield, how many grams of zinc are needed to obtain an actual yield of 1.00 g of zinc chloride? Stuck on how to figure this out!

47. ## mtap

Rose has 45 foreign stamps.she has7 less than twice as many philippine stamps.How many stamps has she?

48. ## Math

There is an error in the student work shown below: Question: Divide (x^3-8)/(x-2) The student did long division and the got x^2 remainder -6+2x^2

49. ## Chem

How many sulfur atoms are present in 0.25 mol of Al2S3?

50. ## Math

A board 26 3/8 inches long must be cut into three pieces of equal length. Find the length of each piece.

51. ## math

The data shows the total number of employee medical leave days taken for​ on-the-job accidents in the first six months of the​ year:19​, 10, 26​, 12​, 28​, 19. Find the mean number of days taken for medical leave each month

52. ## Mental Health

If the correlation between one’s interest in statistics and being a “fun date” was –0.70, it would mean that: a. The higher someone’s interest was in statistics, the more likely it would be that he or she is a fun date b. The higher someone’s

53. ## math

A hotdog costs \$1.27 more than twice the price of a sod. Write an expression that shows the price of a hot dog in relation to the price of a soda. Then evaluate where the soda costs \$99.

54. ## maths

plane leave jammu at 5 am and reached patna at 7.20 am flying at a speed of 600 km/h what will distance coveredby plane

56. ## calculus

An open box having a square base is to be constructed from 32 square inches of material. What should be the dimensions of the box to obtain a max volume?

57. ## Science

Suppose some natural disaster iccured and a dpecies of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with fewer cacti but iverabundance if orchids. What would be the immediate consequences to

58. ## chemistry

a certain volume of a gas 298k is heated such that its volume and pressure are now four times their original values. what is the new temperature

59. ## Math

Ava's dog weighs 52 kilograms. Marty's dog weighs 3/4 as much. How much does Marty's dog weigh?

60. ## Statistic Psychology

Joe had a score of 72 on the Counseling Aptitude Scale, and the standard error of measurement of the scale is 3. Where would we expect Tom’s true score to fall 99.5 percent of the time? a. 71 to 73 b. 69 to 75 c. 66 to 78 d. 63 to 81 I selected A because

61. ## Chemistry

A piece of metal has a mass of 0.010107 kg. When it was placed into a 100-mL graduated cylinder containing 30.0 mL of water, the volume of water increased to 32.3 mL. What is the density of the metal (g/mL)?

62. ## Chemistry

If 26.4 grams of nitrogen and 30.1 grams of oxygen combine to form nitrogen monoxide, how many grams of nitrogen monoxide must form? I am confused on how to do the math.

63. ## pre algebra

Juan rides his motorcycle 168 miles in 3 hours 30 minutes. What is his average speed in miles per hour?

64. ## phyisics

A 0.5kg object is given an initial velocityof 3m/s after when it slides a distance of 8m across a level floor whatis the coefficient of kinetic friction between the object and the floor

65. ## Mathematics

Marsha has \$60.00 . 2/3 of marsha's money is equal to 1/2 of Joanne's money .how much money does Joanne have ?

66. ## calculus

An open box having a square base is to be constructed from 32 square inches of material. What should be the dimensions of the box to obtain a maximum volume?

67. ## physics

A pendulum bob has its maximum speed as 5m/s at lowest position o. Calculate the height of the Bob above o,where its velocity is zero.

68. ## Chemistry

A 0.446-gram sample of iron ore is dissolved in HCl and the iron (Fe solid) is reduced to Fe2+. The solution is then titrated by 38.6mL of 0.105 N KMn)4. Calculate the percentage of Fe in the iron ore sample.

69. ## calculus

My brother wants to make an open-topped box out of a 4x 6 square foot piece of card board by cutting identical squares from the corners and folding up the sides. What is the dimension of each square he will cut out of each corner in order to max the volume

70. ## Physics

Three vessels have different shapes, but the area of their bottom surface is the same, and all three are filled with water with the same depth (1.|_| 2.\_/ 3./_\ ). Rank the magnitudes of the net forces exerted by the water on the bottom surface.

71. ## Physics

I am really struggling with these 2 questions. Please help! 1)Mars has a mass of about 6.91 × 1023 kg, and its moon Phobos has a mass of about 9.8 × 1015 kg. If the magnitude of the gravitational force between the two bodies is 4.87 × 1015 N, how far

72. ## 6th

Approximately 2% percent of the people in the world have red hair. There are about 7,000,000, people in the world.About how many people have red hair?

73. ## Math

As the candle burns,its length decreases at a rate of 2cm every 20minutes. Write down the equation to calculate the length of the candle

74. ## Physics!!!!!!

At some distance from a point charge, the electric potential is 566.0 V and the magni- tude of the electric field is 246.0 N/C. Find the distance from the charge. The value of the Coulomb constant is 8.98755 × 109 N · m2/C2 and the acceleration due to

75. ## college algebra

It is 473,000,000 miles from Jupiter to the sun. Light travels 186,000 miles per second. How long does it take light to travel from the sun to Jupiter? (Express your answer in minutes. Round your answer to two decimal places.)

76. ## random

this website is so helpful but i am confused on some things 1) the people who answer questions is this their job or are they volunteering to for free and what do they gain out of this 2)do the tutors who answer questions sit at home and answer or at some

77. ## calculus

use the derivative f'(x)= x^4-1 to find the local extrema and inflection points of f.

78. ## Statistics

If the standard deviation of a sample is 12 inches, then the variance is 144 sq. inches. Do you agree? Can you try?

80. ## Math

the measure of pair of adjacent sides of a parallelogram are 15cm and 20cm.if the length of one diagonals is 25cm find the area of the parallelogram.

81. ## Chem

Consider the following generic equation: 3A + B ---> 2C + D 2.0 mol A and 1.0 mol B react to form 1.0 mol C. What is the percent yield of this reaction? Please help! thanks!

82. ## Calculus

Does F(x)=9-x^2 satisfy the hypothesis of the mean value theorem on the interval [0,3]? if it does, then find the exact values of all Ce(0,3) that satisfy the conclusion of the Mean Value Theorem.

83. ## calculus

Find the point(s) on the curve y=x^2 that is/are closest to the point (0,3). If you use your calculator to do this (instead of taking a derivative), Sketch the graph that you use.

84. ## math

the adjacent sides of parallelogram are 15 cm and 8cm. if the distance between the longer sides is 4 cm ,find the distance between the shorter sides.

85. ## Maths

In triangle ABC ,D and E are the mid points of BC and AC respectively prove that the area of triangle ABC is 4 times than triangle ABE

86. ## Math

Tom has 5 times as many comic books as Deborah. Deborah has 40% of the number of comic books that George has. if the total number of comics owned by the three friends is 204, how many are owned by Tom?

87. ## Math

The volume of a sphere is increasing at the rate of 5 cm.cm.per second .Find the rate of increase of the radious and surface area when the radious is 6cm.

88. ## Chemistry

Density is an important property of matter. The density of 25oC dry air at sea level is 1.29 g/L. What is the mass unit for dry air? What is the volume unit for dry air?

89. ## Math

A basket ball team scored a total of 160 points. they made 74 baskets. how many 2 point and how many 3 point shots?

90. ## Physics

Two point charges each have a value of 3 μC and are 10 cm apart. What is the electric field at the midpoint between the two charges?

91. ## Calculus

Consider the function f(x) = -3x+2. Notice the limit of f(x) as x approaches 1 is -1. Find a value for delta such that is the distance x is from 1 is less than delta, then the distance from f(x) to -1 is less than 0.05

92. ## Chemistry

An isotope, X, of a particular element has an atomic number of 15 and a mass number of 31. Which of the following statements are true? I. X is an isotope of phosphorus. II. X has 16 neutrons per atom. III. X has an atomic mass of 30.973

93. ## Chemistry

In my upcoming lab we are extracting caffeine from tea through distillation. I was wondering why adding CaCO3 helps this process? Is it due to the basic nature of CaCO3 which decreases the polarity of the caffeine, making it less reactive with water?

94. ## calculus

Use a sign chart to determine the intervals on which f(x)=4x^3-x^4 is concave up and concave down, and identify the locations of any inflection points.

95. ## calculus

Determine the intervals on which f(x)= x+(4/x) is increasing and decreasing. Find the coordinates of any max or min points.

96. ## calculus

Find the locations and values of any global extrema of f(x)=1-x^2 on the interval [2,2]

97. ## Calculus

Find inverse equation of y= 3e^(x-1)^5 Answer I got is (ln(x/3))^(1/5) +5 =y But I think it's wrong because the domain and range is really different from the original equation

98. ## Math

A room has dimensions 10 feet by22 feet and needs wall to wall carpeting. The store charges \$61 per square yard to install the rug. How much will it cost to install the rug?

99. ## Physics

1.A Speed Of A Bullet Of Mass 20g Is 200km/h. What Is The Kinectic Energy.

100. ## Physics

a 50 kg block is being pulled up a 37 degree incline with a force of 450 N applied parallel to the incline. The block moves at a constant velocity. What is the kinetic friction? power if the velocity is 1.5 m/s? acceleration if the applied force increases

101. ## math

Tylenol 3 has 16 mg of Codeine per 11 ml of liquid. A safe dose of Codeine is 4.8 mg/Kg/Day. A patient who weighs 215 pounds needs a Tylenol 3 prescription. There are 2.2 pounds for every 1 kilogram. How many kilograms is this person's mass? How many

102. ## math

Janie is making fruit bars for the bake sale. She uses 1/4 cup of sugar for each batch she makes. She uses 8 cups of sugar to make all the batches. How many batches of fruit bars does Janie make?

103. ## calculus

Determine the intervals on which f(x)=x+(4/x) is increasing and decreasing. Find the coordinates of any max or min points.

104. ## calculus

Use a sign chart to determine the intervals on which f(x)=4x^3-x^4 is concave up and concave up and concave down, and identify the locations of any inflection points.

105. ## Precalculus

Find all xx such that [x6x6 = (x+1)6(x+1)6]. So far, I have found the real solution x= -1212, and the complex solution x = -−1‾‾‾√3−13. Are there more, and if so what/how would be the most efficient find all the solutions to this problem? I am

106. ## math

kelly spend 2/3 of her money on books and from the remaining money, kelly spent 1/4 on food how much money did kelly spend on food from here total amount of money?

107. ## math

Tylenol 3 has 16 mg of Codeine per 11 ml of liquid. A safe dose of Codeine is 4.8 mg/Kg/Day. A patient who weighs 215 pounds needs a Tylenol 3 prescription. There are 2.2 pounds for every 1 kilogram. How many kilograms is this person's mass? How many

108. ## Matha

At what rate of compound interest will a sum of money become 2.25of itself in 2 years?

109. ## math question

An aeroplane flies at 800km/h for one third of its flight time and averages 700 km/h for the entire trip. What is the average speed, in kilometres per hour, over the remaining part of the journey? A. 600 B.750 C.650 D.500 E.625 Could you please explain in

110. ## Linear Algebra

(a) Use the triangle inequality: ||u + v||

111. ## Math

is x^2-3x+28 factorable

112. ## calculus

Use the derivative f'(x0= x^4-1 to find the local extrema and inflection points of f.

113. ## French (HELP!)

1. Traveling around the world is a huge part of me. Voyager dans le monde est une grande partie de moi. 2. Traveling opens my eyes and I've (taken) that (chance). Voyager ouvre mes yeux et j'ai (pris) que (chance). 3. Traveling helps me learn who I am.

114. ## college algebra

The sum of two positive numbers is 34. When the smaller number is subtracted from twice the larger, the result is 26. Find the two numbers,

115. ## Math

Karen wanted to find out how much waster was used when taking a bath and when taking a show. Karen found the dimensions of the tub filled with enough water to take a bath was 1.7 meters x 1 meters x 0.46meters and that the shower uses 5075 liters per

117. ## Math

An article states that gas cost \$122 Canadian dollars per litter in Canada. To be able to compare this price to the US, convert this to Dollars per gallon (\$1 US + 1.18 Canandian Dollar and 1 gallon + 3.78 L

118. ## Physics

Two point charges each have a value of 3 μC and are 10 cm apart. What is the electric field at the midpoint between the two charges?

119. ## Chemistry

Sarin is a nerve gas with a chemical formula of C4H10FO2P. What is the mass of one molecule of sarin?

120. ## Math

16x^2+4x^x-1-12=0

121. ## calculus

Find the location of values of any global extrema of f(x)=1-x^2 on the interval {-2,2].

122. ## math

The perimeter of the isosceles triangle is 28 cm.and side a is equal to (x+2y) while side b is equal to (6y-2x+1) and side c is equal to 4y all in cm.find x and y and hence state the lengths of the side of the triangle

123. ## Math

Construct A triangle Abc Such That Ab Is 6cm Abc 90degree

124. ## English

What is the direct and indirect object in the sentence. Ana gave me a two pesos today.

125. ## Math

Use long division to determine if the divisor is a factor of the dividend. (-x^2-94x+600)/(x+100)

126. ## Math

If I have 12 yards of ribbon, how many 3/4 strips can I cut from it?

127. ## Chem

If test tube 1: 2 grams KNO3 test tube 2: 4 grams KNO3 test tube 3: 6 grams KNO3 test tube 4: 8 grams KNO3 Why would test test tube #1 take longer to recrystallize?

128. ## Linear Algebra

Find the matrix of the following transformations: (a) Multiplication of the point (x, y, z) in ℝ^3 to give the point (x - y, y + 2z, x + z) (b) Reflection of points in ℝ^2 across the line in y = x.

129. ## math

p;2p+2;5p+3 arithmetic sequence determine the next three terms

130. ## Math

Julie wants to find out how much water was used when taking a bath and when taking a shower. Julie found the dimensions of the tub filled with enough water to take a bath was 48 inches x 38 inches x 16 inches and that the shower uses 8.25 gallons per

131. ## Math

Students measure the velocity of a car as it races along a track in a clockwise direction. Their measurements are detailed below: Time (sec) | Velocity (in/sec) 0 | 4 1 | 8 2 | 10 3 | 6 4 | 9 5 | 12 6 | 5 7 | 8 8 | 10 9 | 6 10 | 12 Estimate the distance

132. ## wh

mummification was to???

133. ## math

find the sum of each arithmetic series (a)5+8+11+....to 20 terms

134. ## Grammar

What's the main rule of subject-verb agreement? I need a simple explanation for this because I have an English final exam tomorrow. Thanks.

135. ## Science

What Is Enzymes

Define Rocks

137. ## Algebra 1

So, I need to solve these two problems, graph them on a map and determine the coordinates. x+2y=-6 2x-4y=-4 A. (4,-4) B. (-3,4) C. (-4,-1) D. (-2,9) E. No solution

138. ## Math

-1/2x-3greater than 8