# Questions Asked onSeptember 18, 2016

1. ## stats

Find the​ z-scores for which 92 ​% of the​ distribution's area lies between minus z and z.

2. ## Math

You roll two fair dice. Let E be the event that an even total shows on the dice. Let F be the event that a three shows on at least one die. Find P(F) and P(F∣E).

3. ## Math

A 14 inch board is to be cut into 3 pieces so that the second piece is twice as long as the first piece and the third piece is 4 times as long as the first piece. If x represents the length of the first piece find the lengths of all three pieces

4. ## Math

What are the odds of drawing a 5 from these cards? 1,2,3,4,5 I do not understand how to solve this. Thanks

5. ## Statistics

From a sample with n equals=24​, the mean number of televisions per household is 3 with a standard deviation of 1 television. Using​ Chebychev's Theorem, determine at least how many of the households have between 1 and 5 televisions.

6. ## Maths

Boy lost 0.3 of his marbles . He has 77 left . How many did he start with?

7. ## Math

Your long distance telephone providers offers two plans.Plan A has monthly fee of \$15 and \$0.25 per minute. Plan B has a monthly fee of \$20 and \$0.05 per minute.Write and solve an equation to find the number of minuts that you must talk to have the same

8. ## Science

A piece of unknown metal with a mass of 68.6 grams is heated to an initial temperature of 100 Celsius and dropped into 42 grams of water with an initial temperature of 20 Celsius in a calorimeter the final temperature of the system is 52.1 Celsius the

9. ## Science

Which of these choices do both sustainable and organic agriculture avoid? A. Artificial hormones B. Pesticides C. USDA certification D. Antibiotics

10. ## maths

A boat sails 50km on a bearing of 070degrees. How far east does the boat travel?

11. ## physics

A public transportation bus travels back and forth along a road, following the position-time graph over the time period shown below. There are five points labeled on the graph. What is the average speed and velocity (magnitude and direction) of the bus

12. ## Calculus 2

A culture of bacteria is growing at the rate of 20e^0.8t cells per day, where t is the number of days since the culture was started. Suppose that the culture began with 50 cells. (a) Find a formula for the total number of cells in the culture after t days.

13. ## math

find the image (0,0) after two reflections first across y=3 and then across X-axis

14. ## Math

If we toss four fair coins, what is the probability that we get more heads than tails? HHHH TTTT HHTT TTHH HTHT THTH HHHT TTTH HTTH THHT Would the answer be 2/10? I am a little confused. Thanks for the help!

15. ## Pre-Algebra

A chess club with 40 members is electing a new president. Lisa received 16 votes. What percentage of the club members voted for Lisa?

16. ## physics

Calculate the resultant force when four forces of 30N due east 20N due north 50N due West and 40N due south are acted upon a body

17. ## Language Arts

Can you help me unscramble to make a sentence Canoes called Inuit go frail in skin the kayaks fishing

18. ## physics

A WEATHER BALLOON IS TO OPERATE WHERE THE DENSITY OF AIR IS 0.9Kg/m3. THE BALLOON HAS A VOLUME OF 20cm3 AND IS FILLED WITH NITROGEN WITH DENSITY 0.09Kg/m3. IF THE BALLOON BAG WEIGHS 118N, WHAT LOAD CAN IT SUPPORT AT THIS ALTITUDE?

19. ## Math

Last month a store sold 4 times as many tapes as CDs. If the total quantity of these two items sold was 360, how many tapes did the store sell?

20. ## Culturel Diversity

Talking the talk emphasizes the use of lableing individuals positivly

21. ## physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C?

22. ## math

A farmer planted 3 2/3 acres of oats, 5 3/4 acres of wheat, and 2 5/6 acres of barley. Compute the total number of acres planted?

23. ## physics

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 6.5 min to heat on full power. If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?

24. ## Math

The price of a small cabin is ​\$45,000. The bank requires a​ 5% down payment. The buyer is offered two mortgage​ options: 20-year fixed at 6.56.5​% or​ 30-year fixed at 6.56.5​%. Calculate the amount of interest paid for each option. How much

25. ## math

The length of the room is 9 meter, its floor is tiled by using 96 square tiles of 0.75m x0.75m each. What is breadth of the room?

26. ## Chemistry

You are required to prepare 100g of potassium nitrate crystals from its saturated solution at 75 degree Celsius. If the solubility of potassium nitrate at 75 degree Celsius is 155g and 20 degree Celsius is 31g, find the weight of potassium nitrate solution

27. ## Math

The maximum horizontal range of a projectile is given by the formula R=u^2/g, where u is the initial velocity and g is the acceleration due to gravity. Find the velocity with which a ball can be thrown to have a maximum range of 20 meters when the

28. ## physics

How much heat is necessary to change 345 g of ice at -11°C to water at 20°C

29. ## Chemistry

pH indicators change color at their _____. The pH at which the color change happens for a particular indicator molecule depends on its: A. pKa; concentration. B. pKa; Ka or Kb. C. equivalence point; Ka or Kb. D. equivalence point; concentration. Is the

30. ## Math

Belinda borrowed \$20,500 at simple interest rate of 4.30% p.a. from her parents to start a business. At the end of 3 months, she paid them \$7,100 and \$6,900 at the end of 8 months. How much would she have to pay them at the end of 18 months to clear the

31. ## English

3. The organizational pattern of the Gettysburg Address is (1 point) Problem and solution, because Lincoln explains what is necessary to win the Civil War. Compare and contrast, because Lincoln compares the soldiers at war with the ones who died.

32. ## psychology

when groupthink is at play, the ability to______is compromised.

33. ## English

1. Mina uploaded Yujin's photo on the school website without her permission. 2. She uploaded her photo imitating monkeys. 3. She didn't ask Yujin if she could upload her photo. 4. She didn't delete the photo right away. --------------------------- Would

34. ## Maths

X Y & Z are 3 whole numbers that in total add up to 1750. X + Y and Z = 1750 X is 4 times greater than Y. Z is 2 times greater than Y. Calculate the 3 numbers X Y & Z?

35. ## Math

Nathan plants equal sized square of sod in his front yard each square has An area of 6 square feet Nathan plants a total of 1,000 squares in his yard what is the total area of the square sod

36. ## math

What equation is equivalent to 24=ax+4y-10, when solving for y? A: y=7/2-ax/4 B: y=17/2-ax/4 C: y=17- ax/4 D: y=34- ax

37. ## Physics

Starting from rest at 10m to the left of the origin (the starting line of a race), a go-kart undergoes constant acceleration of 2.46 m/s2. Make a table calculating the karts position and velocity at 10 second intervals from t=0 to 60 seconds. I have

38. ## science

Maximize value Z = 15x + 10y subject to the constraints 3x + 2y ¡Ü ¡Ü 12, 2x + 3y ¡Ü ¡Ü 15, x ¡Ý ¡Ý 0, y ¡Ý ¡Ý 0 is

39. ## Physical Science

While rearranging a dorm room, a student does 310 J of work in moving a desk 1.5 m. What was the magnitude of the applied horizontal force?

40. ## Math

mrs sharma spends 5/8 of his income which is 5000 on food what is his income

41. ## English

What is the Rhyme Scheme to the following Anne Bradstreet Poem To her father with some verses

42. ## PHYSICS

What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

43. ## Maths

A water tap fills at the rate of 25 litre per minute into a water tank another water tap can fill water in the same tank at the rate of 15 litres per minute if both the water taps are opened then the water tank is filled in 15 minutes find the volume of

44. ## mathematical physics

Using Green's Theorem evaluate the integral ∮c(xydx + x^2y^2 dy) where C is the triangle with vertices (0 ,0), (1, 0) and (1, 2).

45. ## physics

The energy released by a heater which draws a current of 5A at 220V for 1min. E ~ V × I× t( hrs)÷1000 220×5×0.0167÷60000 Is equal to 0.00030 Kwh

46. ## Biostatstics

Question: The New York State Health Department reports a 10% rate of the HIV virus for the “at-risk” population. Under certain conditions, a preliminary screening test for the HIV virus is correct 95% of the time. (Subjects are not told that they are

47. ## Physics

A diver jumps off of a diving board. She leaves the board with a velocity of 3.70 m/sec in the upward direction. How far will she rise above the diving board before she reverses her motion and starts to fall downward?

48. ## Math

In the square, x represents a positive whole number. find the value of x such that the area is equal to half the perimeter of the square.

49. ## Math

Benjamin had to make payments of \$1,500.00 and \$2,600.00 in 12 months and 14 months, respectively, to a raw material supplier. What single payment in 3 months would settle both these payments? Assume a simple interest rate of 7.90% p.a. and use 3 months

50. ## Math

Parmesan cheese was on sale for \$13.60 per pound. Wesley bought a piece of the parmesan cheese that weighed 1 1/8 pounds. How much did he pay? Answer ASAP..

51. ## math

Which choice is equivalent to the equation -4(x+b)=p+8b A: x=p+7b-4 B: x=-4p-28b C: x=-1/4p+b D: x=-1/4p-3b

52. ## Math

Solve the equation. 1. y-5/3 =1 A -2 *** B 8 C 18 D 6 2. 6x + 29 =5 A -4 B -18 ** C 204 D -144

53. ## PHYSICS

Two objects are tied together and placed on a frictionless table. One is pushed off the edge of the table so it falls, dragging the second along the surface of the table. The magnitude of the acceleration of the falling object is _______.

54. ## Physics

The Earth is about 81 times more massive than the moon. During the gravitational interation of the Earth and the Moon, the magnitude of the gravitational force acting on the Earth _______ the gravitational force acting on the Moon. A) is greater than B) is

55. ## Chemistry

How do i calculate these and express the answers in significant digits? 2.865 x 10^4m x 1.47 x 10^3 8.071 cm^2/ 4.216 1.142 x 10^-8 mm^2 / 8.5 x 10^-4 mm i tried the first one and got 4212. but i don't know if it's right

56. ## math

Ben deposits \$400 into an account that earns 5% interest compounded annually. Sam deposits the same amount into an account that earns 5% simple interest. Compare the account balances after 2 years.

57. ## Integrated Math

If (c) were f(x)=-4/(k+7) what value of k would be excluded from the domain? I know that we cant have 0 in the denominator. I solved the following: k+7=0 Value cannot be -7

58. ## Physics

A truck of mass 2 tonnes moving at a speed of 25 m/s is brought to rest suddenly in 5 seconds. Calculate the power exerted by the brakes

59. ## Maths

In a circle of diameter 40 cm the length of a chord is 20 cm find length of minor arc of chord

60. ## calculus and chemistry

A container of hot liquid is placed in a freezer that is kept at a constant temperature of 10°F. The initial temperature of the liquid is 160°F. After 5 minutes, the liquid's temperature is 60°F. How much longer will it take for its temperature to

61. ## Chemistry

a. Write and balance the equation for the reaction of calcium carbonate with hydrochloric acid, then answer the following questions. b. What mass of calcium carbonate is required to neutralize 83.5mL of 6.00M HCl? does the balanced equation have any

62. ## Math

Combine like terms: 1. -21a + 16a A -5a B 5a C 37a D -37a** 2. 5 (x + 10) + x A 6x + 15 ** B 5x + 15 C 6x + 50 D 4x - 50

63. ## math

In the square, x represents a positive whole number. find the value of x much that the area is equal to half the perimeter of the square.

64. ## Math

Remember each team has to have same number of boys and thr same number of girls. There are 12 boys and 15girls. How many teames can be formed?

65. ## science

what mass of CO2 can be formed when 14.17g of C4H10 are burned in excess oxygen I do not even know where to start

66. ## math

The formula for the area of a trapezoid is A=1/2h(b1+b2) were h is the height of the trapezoid, and b1 and b2 are the base lengths of the trapezoid. Which formula can be used to find the length of b1?

67. ## Math

In a fruit basket there are nine apples 18 bananas and 15 oranges what is the ratio of bananas to the total number of fruit in the fruit basket

68. ## physics

On a banked race track, the smallest circular path on which cars can move has a radius of 101 m, while the largest has a radius of 163 m, as the drawing illustrates. The height of the outer wall is 19.0 m. Find (a) the smallest and (b) the largest speed at

70. ## Math

Please help me. You work every Sunday in the yard from 8:00 A.M. To 11:30 A.M. Draw a diagram that shows the rotation completed by the hour hand of a clock during this time. Find the measure of the angle generated by the hour hand in both degrees and

71. ## Chemistry

If you had dehydrated 1.00g of the hydrate CaCl2 ∙6H2O how many grams of anhydrous CaCl2 would you expect to be produced? Show calculations. I really am having a hard time with this question. I don't know where to start and how to perform it.

72. ## Math

270 tickets were sold at a school event. The total money collected is \$1700, if the adults cost \$10 and the student section cost \$5. How many adult tickets were sold? My teacher gave this to us but he didn't explain it how. Can you help me answer this

73. ## Math

Suppose a fair four-sided die is tossed 22 times. What is the probability of getting at most 6 fours?

74. ## Algebra

A department store is offering a coupon for 26% off for any purchases over \$100. How much would you spend for a \$100 purchase? You would spend \$____. Construct a formula a piecewise functiom for the actual cost, C, of the purchase as a function of the

75. ## Math

If a have half a quart of hot chocolate and each mug holds 1/8 a quart of hot chocolate how many mugs will I fill

76. ## chemistry

How many grams of FeBr 3 would be present in 150.0 mL of a 0.435 M FeBr 3 solution?

77. ## English

What does this sentence mean from the Scarlet Letter? Yet the taste of the age, demanding whatever was elaborate in compositions of this kind, did not fail to extend its influence over our stern progenitors, who had cast behind them so many fashions which

78. ## Math Algebra

A brand cookie mix calls for baking cookies at a temperature of 350°F. However, for high altitues (3500-6500 ft. above sea level) l, baking at 37t°F is suggested. a. Construct a piecewise linear function for the recommended baking temperature, T (s), as

79. ## Geometry

E = hc/y , solve for the variable h

81. ## Chemistry

How many grams of CO2 is produced from 855 grams of C6H12O6 in the process of cell respiration?

82. ## English

1. What will you do if you visit one of the four cities? Write a short passage about your trip. 2. What would you like to do if you visit one among the four cities in this passage? Write a short essay related to the trip with more than 10 sentences. 3. If

83. ## math

The cans manufactured at a factory must have a capacity of 355 mL, with a maximum variation of less than 2mL.Cans with capacities outside this limit are rejected. Which inequality best represents the capacity, v, in ml, of a can that will be rejected?

84. ## SS

Ming Moved to toronto 10 years ago when he was three. He still Speaks Chinese but has learned english and some french. he celebrates both chinesse and canadaian holidays.ming best reflects that canada is a____________.

85. ## Math

What symbols will go in the numbers in this form 81 11 8 4 and 1 and equals 60.

86. ## Math

Factorise x^3+1/1/x^3 (i.e x cubed plus 1 and 1 over x cubed) how is it done? Thanks

87. ## language arts

Unscrable the word bssmyale.at a dance

88. ## Math

1/4 + 2/7 + 11/12 subtract 3/4

89. ## Math

Show that the sum of 3 consecutive odd integers is a multiple of 3? I'm not so sure on how to answer this question, can you please help and show me on how to find it?

90. ## scince

If the intensity is increased by a factor 20,by how many decibel is the sound level increased

91. ## Math

How do I show that the sum of 3 consecutive odd integers is a multiple of 3? Can you please help me answer this question? My teacher didn't explain on how to solve it very well.

92. ## physics

What is the acceleration of a 10-N freely falling object with no air resistance?

93. ## Physics

If you apply a changing force, will either the velocity or the acceleration change in the same way as the force?

94. ## Math

The sum of 5 consecutive even integers is 50. What is the middle one? Can you show the equation and how you solved it please?

95. ## Math 115

Create a piecewise function of the following scenario where D(t) is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 6 miles per hour for 25 minutes. You rest for 15 minutes,

96. ## mathematical physics

Using Stokes' theorem evaluate ∫c F.dl where F = yi^+ xz^3 j^-z y^3 k^ and C is the circle x^2+ y^2 = 4; z = -3.

97. ## Math

During summer vacation, Sanjay writes letters and postcards to his friends at home. A letter costs \$0.41 to mail and a postcard costs \$0.21 to mail. Sanjay writes to 8 friends and spends \$2.08. How many letters and postcards he sends.

98. ## Math

How do I show that the sum of 2 consecutive integers is always odd? I'm stuck on this question. Can you explain and show how to solve this? Thank you! :)

99. ## Science

A transformer has 60 turns in the primary and 1200 turns in secondary.if the primary voltage is 500 V what will be the secondary voltage be? What will the current be if the primary if the secondary carries 2.0 A

100. ## Maths

Mrs .Smith walk 3/8 of a journey and took a taxi for a further half of the journey and walk the remaining 2 kilometers A)how long was the entire journey? B)what was the total distance walked? C)how far did she travel by taxi?

101. ## Math

How will you add,subtract,multiply, and divide 14,2,7,3,and 9 in that form to get to the answer 10.

102. ## chemistry

a graduated cylinder containing 75.0 mL of water has a mass of 149.86 g. A piece of metal is added to the cylinder and the volume of the water changes to 86.3 mL. The mass of the graduated cylinder, water and metal rises to 218.90 g.

103. ## Camestry

Calculate the mass of 0.250 L of ethyl acetate , if the density of ethyl acetate is 0.90g / ml .

104. ## Physics

If a ball is launched straight upwards from the ground with an initial velocity of 20.0 m/s, how long does the ball take to reach a height of 15.0 m on the way up? For the same situation, at what time does the ball reach 15.0 m on the way back down?

105. ## Chemistry

At a high temperature, the equilibrium constant for the decomposition of hydrogen iodide is 65.0. If the initial concentration of HI is 1.60 M, what is the concentration of hydrogen at equilibrium? 2Hl(g) H2(g) + I2(g) A. 1.42 M B. 0.753 M C. 0.240 M D.

106. ## College Algebra

Consider the amount of gas in your car during a road trip. You start out with 40 gallons and drive for 4 hours, leaving you with 24 gallons in the tank. You stop for lunch for 2 hours and then drive for 2 more hours, leaving you with 16 gallons. t= time C

107. ## Chemistry

Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D.

108. ## Math

Jason has 20 coins that are only dimes and quarters. The total value is \$2.75. How many of these are quarters? I tried answering it but I got 5 quarters. I'm not so sure if that's the right answer. Can you show me the equation and the right answer to see

109. ## Physics

If a ball is dropped from a height of 100.0 m, what is it's height above the ground (in meters) after 3.0 s? If a ball is dropped from a height of 100.0 m, what is it's velocity (in m/s) after 3.00 s? You may treat downward velocity as positive.

110. ## Math

it is possible x square minus 2x ?

111. ## Economics

14. The life-cycle hypothesis and Permanent Income Hypothesis theories of consumption: A) are attempts to discredit the Keynesian consumption theory. B) believe that consumers do not have any autonomous consumption. C) assert that consumption is a

112. ## math

hello, I am to calculate a model length of a boat and a car. The boat's true length is 17 feet and the car's true length is 20 feet. The model will be on a 1:16 scale. Could you tell me how I get started with this please?

113. ## Economics

15. Helen’s consumption function may be stated as \$1,000 + 0.75 × YD . Her autonomous consumption is: A) 0.75. B) 0.25. C) \$750 D) \$1000. My answer is letter D, i just want someone to check if it's correct.

How do i solve this. Atomic Theory Date (year) Name of Scientist(s) Contribution to the Theory Source 5th century BC Leucippus and Democritus They proposed that all matter is composed of tiny particles called atoms that can’t be split into smaller pieces

115. ## Economics

16. Helen’s consumption function may be stated as \$1,000 + 0.75 × YD. If her income is \$50,000, her consumption will be: A) 37,500. B) \$51,000. C) \$1,000. D) \$38,500. E) none of the above. My answer is A, i just want to double check if my answer is

116. ## English

1. Will you summarize the passage? 2. Will you tell us summary of the passage? 3. Will you make a summary of the passage and say it to us? 4. Will you tell us about the summary of the reading text? 5. Will you summarize the passage and say it out loud in

117. ## Algebra

In an automobile race, the rate of one car was 120 mi/hr and the rate of another was 105 mi/hr. If the faster car finished the race 20 minutes before the slower one, what was the distance of the race?

118. ## Calculus III

Topic: Quadric surfaces. I have two homework problems, and they are quite a doozy for me. So the point is, I am given details of a quadric surface on the Cartesian coordinate system, and thus have to use the data to construct an equation through it.

119. ## Algebra

Find the value of r so the line that passes through each pair of points has the given slope. (r, -5), (3, 13)

120. ## math

The ratio of two angles is 3:1 find the larger angle if the smaller is 180

121. ## English

Converting common noun into abstract noun

122. ## algebra

the perimeter of one square exceeds that of another by 16 and its area is 14 less than 4 times the area of the other .what is the length of the side each square

123. ## AP CHEM

A bar of strontium metal is immersed in a 1.0 M copper(ll) nitrate solution. write the net ionic. I have the molecular formula written out but im not sure how to write the net ionic for this single displacement reaction

124. ## PHYSICS

In an archery practice an arrow was realesed from a bow with a velocity of 20m/s it strikes and slopes find at what rate the aarrow was aaccelarated

explain intel Core 2 duo T667(2.2 GHz ,2MB L2 cache )

126. ## Chemistry

There have been two ways on making transuranium elements: neutron bombardment and a)beta bombardment b)gamma bombardment c)positron bombardment d)photon bombardment e)heavy atom bombardment

127. ## English

when taking an online test, be sure to do all of the following EXCEPT:

128. ## Math

Suppose two cards are drawn from a well-shuffled deck of 52-cards. What is the probability that both cards are face cards? What formula would I use?

129. ## Math

The equation of the motion of a body suspended by a spring is T=2π√m/k, where T is the time period, m is the mass of the body, and k is the force constant of spring. use this information to find the time period if a body of mass 10 kg is suspended by a

130. ## MATHS

1) For how long must an investment be left at 5.5% p.a compounded yearly for the initial amount to double?

131. ## Maths

Dave takes out a 27-year mortgage of 200000 dollars for his new house. Dave gets an interest rate of 14.4 percent compounded monthly. He agrees to make equal monthly payments, the first coming in one month. After making the 70th payment, Dave wants to buy

132. ## physics

A 4.6 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.45 m above the counter

133. ## Physics

In mud buggy driving, people attempt to drive an off road vehicle over a deep mud puddle. If the buggy stops before the end, it sinks into the mud and needs to be pulled out with a tow truck. A racer is driving his mud buggy in a straight line . when he

134. ## Math

The average of four numbers is 33. Three of the numbers are 21, 42 and 32. Find the fourth number.

135. ## math

Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at \$19.50 per month, plus a one-time registration fee of \$59. Joe plans to join Wacky Workout World because Wacky Workout World only charges \$9.50 per

136. ## Algebra2

Solve the system by elimination. -2x+2y+3z=0 -2x-y+z=-3 2x+3y+3z=5

137. ## math

Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at \$19.50 per month, plus a one-time registration fee of \$59. Joe plans to join Wacky Workout World because Wacky Workout World only charges \$9.50 per

138. ## Algebra2

Solve the system by substitution -x-y-z=-8 -4z+4y+5z=7 2x+2z=4

139. ## math

Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at \$19.50 per month, plus a one-time registration fee of \$59. Joe plans to join Wacky Workout World because Wacky Workout World only charges \$9.50 per

140. ## Math

One number is 5 more than another. The quotient of the larger divided by the smaller is 4/3. Find the number

141. ## math

Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at \$19.50 per month, plus a one-time registration fee of \$59. Joe plans to join Wacky Workout World because Wacky Workout World only charges \$9.50 per

142. ## Math

the Pythagorean theorem a square + b square = c square a square + x square = 4 square how to find x square?

143. ## CHEMISTRY

As a technician in a large pharmaceutical research firm, you need to produce 450. mL of 1.00 M a phosphate buffer solution of pH = 7.20. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

144. ## physics

While in Europe, a tourist hears on the radio that the temperature that day will reach a high of 22°C. What is this temperature on the Fahrenheit scale?

145. ## chemistry

suppose that you have a micro pipet which delivers 100 drops per cubic centimeter, and a solution of 5.0% by volume of oil in alcohol. if you had used 10 drops of this solution, how many cubic centimeters of pure oil would be left after evaporation of the

146. ## physics

A microwave oven has a power requirement of 1250 W. A frozen dinner requires 6.5 min to heat on full power. How much electrical energy (in kWh) is used?

147. ## math

If a, b and c share a bag of mangoes in the ration 7:5:14 and b receives 18 mangoes less than c, how many mangoes does c receive.

148. ## Mathamatics

If it has been determined that the probability of an earthquake occurring on a certain day in a certain area is 1 over 20 , what are the odds against an earthquake? Would the answer be 19:1?

149. ## Maths

Simone wants to estimate the number of deer in a forest . She catches 60 deer and puts an orange mark on each one of them . She then releases them back into the forest . A week later she catches 30 deer and finds that 9 of them have an orange mark .

150. ## Chemistry

KMnO4 + H2SO4 + H2S will give K2SO4 + MnSo4 + H20 + S

151. ## Algebra

120t = 105 (t+1/3) Find the disrance

152. ## math

A box filled with 38 identical balls had a mass of 2.13kg.When 26 balls were removed,the total mass of box and the remaining balls was 0.96 kg.Find the mass of the box when it was empty

153. ## Geometry

Help! I need a 7 step proof of 4 triangles cut by two intersecting transversals. E IS THE MIDPOINT OF Ac. And two lines are parallel . Prove E is also the midpoint of something else

154. ## math

MR Zheng sold a total of 576 muffins and cookies the ratio of the number of muffins sold to the number of muffin sold to the number of cookies sold was 4:5> how many muffin were sold and how many more cookies that muffins were sold

155. ## scince

Mars=750N the value of g is 38% of that of earth what is the mass of the men on the earth and his weight of mars

156. ## Math

In aclass of 100 students the average mark in math paper is 60.the average mark for the top 30 students is 80.find the average mark for the remainning 70 students.

157. ## physics

23. Two identical balls each have an excess charge of 5.0 x 10-7 C, and they are attached to the ceiling by light string 0.80 m long as shown in the figure below. If the angle that the threads make with respect to each other is 300, determine the force

158. ## Physics

In mud buggy driving, people attempt to drive an off road vehicle over a deep mud puddle. If the buggy stops before the end, it sinks into the mud and needs to be pulled out with a tow truck. A racer is driving his mud buggy in a straight line . when he

159. ## Equivalent Payments

Belinda borrowed \$20,500 at simple interest rate of 4.30% p.a. from her parents to start a business. At the end of 3 months, she paid them \$7,100 and \$6,900 at the end of 8 months. How much would she have to pay them at the end of 18 months to clear the

160. ## Math

The area of a plot of land on map A is 800cm^2. Calculate the area of the same plot of land on map B which has a scale of 1:5000. (Scale of map A is 1:3400)

161. ## Math

S = 2πr2 + 2πrh

162. ## Computer Science

What is the rule for this function? input 1 output 2 input 2 output 5 Input 3 output 12 Input 4 output 34 Input 5 output 135 Input 6 output 741

163. ## math

The orbital velocity of a satellite is given by v=√GM/R+h, where G= 6.67*10^-11 Nm^2kg^2, is the Universal Gravitational Constant, M=6*10^24 kg, is the mass of Earth, R=6.38*10^3 km, the orbit of the satellite, and h is artificial satellite above the

164. ## Math

In class 3 there are 30 pupils. There are 20 girls and 10 boys. A.What fraction of the pupils are girls? B. What fraction of the pupils are boys?

165. ## math

What is the rule for this function? input 1 output 2 input 2 output 5 Input 3 output 12 Input 4 output 34 Input 5 output 135 Input 6 output 741

166. ## Chemistry

The mineral dolomite has the formula caco3.mgco3. When dolomite is heated for an extended period of time at elevated temperature it decomposed to give carbon dioxide and a mixture of calcium oxide and magnesium oxide. If a 5.424 g sample of the mineral is

167. ## Math

How do you do this problem its a literal equation problem. S = 2πr2 + 2πrh

168. ## English

A fundamental theme of the Gettysburg address is A. The condemnation of unnecessary violence B. The description of the impact of the Civil War C. The appeal for preservation of democracy in the United States D. The appeal for democracy within the union I'm

169. ## Math

Ritz plumbing company charges a service fee of \$75 and charges \$50 per hour to fix your plumbing.

170. ## Physics

A 20 kg block is placed on a 35 degree ramp. What is its true metric weight?

171. ## Chemistry

Calculate the number of moles of Cl atoms in 6.28 mg CuCl2.

172. ## math

The base of a prism is a right angled triangle with its two shorter sides are equal to 4cm and 8cm.The prism is 10cm long.

173. ## Math 2

Solve for x (√3)sinx - cosx = 2 X is smaller than 360 degrees Help

174. ## math

Write the following formula (for any triangle abc): - The minimum perimeter value of any triangle (abc) known heights corresponding to the sides a and b. x = side a height (known) y = side b height (known) p = perimeter (unknown) Note: You don't have the

175. ## Physics

A skydiver is falling to earth. When he is traveling at 51.3 m/sec, he opens his parachute, and after 3.00 seconds he reaches the speed of 4.30 m/sec. The remaining 60 seconds before landing is spent traveling downward at the speed of 4.30 m/sec. What is

176. ## math

what is the answer please its my last question: S = 2πr2 + 2πrh

177. ## Chemistry

1.0 x 10^5 mL=m^3

178. ## Physics

A rock perched on the edge of a cliff falls off. It starts from rest, and falls freely for 1.48 seconds before reaching the ground at the base of the cliff. What is the speed of the stone just before it hits the ground?

179. ## Math

Farmer has a field 1 square mile wide and 1 square mile wide. He divides it into fields 1/3 mile wide and 1/3 mile long how many fields will he have

180. ## Chemistry

Calculate the concentration of chloride ions in the following solution. 73.28g of sodium chloride in 862. mL of solution. would it be 73.28g x 2 / 58.44g NaCl = 2.50 mol of Cl 2.50 mol Cl / .862 L = 2.91 M Cl

181. ## Math

Solve each equation. Write each equation in simplest form. 7x/8 +21 A 24*** B 18.375 C 1.857 D 19

182. ## Physics

A person takes a trip, driving with a constant speed of 94.0 km/h except for a 22.0 min rest stop. If the person's average speed is 60.1 km/h, how much time is spent on the trip and how far does the person travel?

183. ## Math

a triangle is 6 cm wider that it is tall. The area is 56 cm². Find the height and the base.

184. ## Physics

A student walking home at a steady rate of 4.80 m/s suddenly decides to start running. She can accelerate at 7.50 m/s22, and runs for 1.70 s before stopping. What distance did the student cover while running?

185. ## math

K=3gy/5f solve for g

186. ## Zean

Rewrite the following sentence and provide correct capitalization wherever needed. I love mama Liberia and am very proud to be a Liberian

187. ## math

What is the rule for this function? input 1 output 2 input 2 output 5 Input 3 output 12 Input 4 output 34 Input 5 output 135 Input 6 output 741

188. ## College Math

One manufacturer needs to calculate the net price of an order with a list price of ​\$800 and a trade discount series of 12​/9​/4. Use the net decimal equivalent to find the net price.

189. ## math

The orbital velocity of a satellite is given by v=√GM/R+h, where G= 6.67*10^-11 Nm^2kg^2, is the Universal Gravitational Constant, M=6*10^24 kg, is the mass of Earth, R=6.38*10^3 km, the orbit of the satellite, and h is artificial satellite above the

190. ## mathematical physics

An unbiased coin is tossed three times. If A is the event that a head appears on each of the first two tosses,B is the event that a tail occurs on the third toss and C is the event that exactly two tails appear in the three tosses,show that: i) Events A

191. ## HISTORY

1. Scientists classify native people living in the Americas as having lived during one of four time periods. Which shows the correct order in which these time periods occurred? (1 point) Woodland, Mississippian, Paleo-Indian, Archaic Mississippian,

asked by FAM I NEED HELP
192. ## Math

Solve each equation. Write each equation in simplest form. -6q + 5.8 = 23.8 A q = 3 B q = -3** C q = 1.83 D q = 4.93

193. ## MGT450

How is strategic planning different from a strategic analysis? 1) requires a lot of research about the external environment 2) requires buy-in and commitment from the participants 3) ends with short-and long-term recommendations 4) is designed to choose

194. ## math

r=½x+y Solve for y

195. ## value

what are the branches of home economics

196. ## physics

In Mud buggy driving, people attempt to drive an off-road vehicle over a deep mud puddle. If the buggy stops before the end , it sinks into the mud and needs to be pulled out with a tow truck. A racer is driving his mud buggy in a straight line. when he

197. ## French

This is the edited verson after Mme helped. Can you check this again Mme? 1. La plupart des gens se demandent ce que est mon origine ethnique ... 2. Je suis heureuse de vous expliquer. 3. Mes parents sont nés au Vietnam. 4. Il y a des siècles, avant

198. ## Math

The minute hand of a colck is 10cm long.How far does the minute hand move in 1 hour?

199. ## Math

Lester jogs 5 3/4 miles each day that he jogs. Last month, he jogged a total of 115 miles. How many days did he jog Last month? Plz answer ASAP!!