# Questions Asked onMarch 28, 2017

1. ## Algebra

An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

2. ## physics

Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as indicated in the figure (Figure 1) . Part A If the radius of curvature of the bump is 52 m, find the apparent weight of a 66-kg

3. ## Math 120

You are dealt one card from a​ 52-card deck. Find the probability that you are not dealt an ace.

4. ## Math ASAP

Which number is irrational A. 3/17 B. 25/ C. 0.6 D. 33/

5. ## hi

Fourteen soccer players want to share nine protein bars after the game. What fraction of a protein bar will each player get?

6. ## chemistry

How many grams of NaHCO3 should be added to one liter of 0.100 M H2CO3 (Ka = 4.2 x 10-7) to prepare a buffer with pH = 7.00? I got molefrom.100/1L equal .100mole. where do I go from here?

7. ## Math- Graphing (check answer)

Determine which ordered pair is a solution of y= -5x + 10. A. (-15,5) B. (2,0) C. (-1, -5) D. (3, 25) My answer is A. Am I correct?

9. ## math

240 people attended a concert.tickets for adults were R60 and for children R40. The concert raied R12800. How many adults and how many children attended???

10. ## Math

During an epidemic, the number of people who have never had the disease and who are not immune (they are susceptible) decreases exponentially according to the function where t is time in days. f(t)=15,000e^-.05t Determine how long it will take for the

11. ## PHYSICS

Two springs, with force constants k1=175N/m and k2=270N/m, are connected in series, as shown in (Figure 1) . Part A: When a mass m=0.50kg is attached to the springs, what is the amount of stretch, x? k1 I k2 I m ? ] x

12. ## calculus

The path of a baseball relative to the ground can be modelled by the function f(t)=−t^2+8t+1, where d(t) represents the height of the ball in metres, and t represents time in seconds. What is the speed of the ball when it hits the ground?

A 2.0kg block of wood starts at rest and slides down a ramp. Its initial height is 12.0m. If the final velocity of the block is 13m/s, determine the energy of this system that has been turned into heat.

14. ## chemistry

Give the IUPAC name of thish hydrocarbon ch3ch2c(ch3)2ch2ch2ch2ch3

15. ## Designing Specialty Areas

The book discusses "creating a sense of place." Amelia, a teacher who lives near Lake Erie, wishes to implement this concept. Which of the following playground structures would help her achieve this goal? A. A rowboat for pretend play B. A wooden

16. ## Chemistry

A 152 g sample of ice at –37 degree C is heated until it turns into liquid water at 0 degree C. How do you find the change in heat content in the system? I've found H(I) [Change in heat of the ice] to be 11416.72 but im still stuck on the change of heat

17. ## Algebra

A rectangle's width is 6 inches less than its length. If it's area is 216 square inches find the dimensions of the rectangle. Write an equation and solve

18. ## Physics

A uniform meter rule is balanced at the 30cm mark when a load of0.8 newtons is hung at the zero mark .at which point is the center of gravity.

19. ## physics help

At a playground, a 20-kg child sits on a spinning merry-go-round, as shown from above in (Figure 1) . The merry-go-round completes one revolution every 6.2 s, and the child sits at a radius of r=1.8m. a) What is the force of static friction acting on the

2.on which of the following lines does the point (7, 1) lie A. y - 5x = 4 B.y = x - 10 C. y=-4x + 3 D. y= -x + 8 Is it B? 3.Find the slope of the line through (-9, -10) & (-2, -5) A -5/7 B 7/5 C 5/7 D -7/5 Is it D? 10. The equation t=0.07c represents tax,

21. ## biology

HELP PLEASE!!!! How does the outcome of a chemical reaction that absorbs energy differ from one that releases energy?

22. ## MATH

Evian's average no five tests were 90%. The average of the four highest test scores was 93%, and the average of the four lowest test scores was 87.75\$. What was the sum of the lowest mark and the highest mark?

23. ## College Math

Michael is a software salesman. Let y represent his total pay (in dollars). Let x represent the number of copies of History is Fun he sells. Suppose that x and y are related by the equation 1700+90x=y .

24. ## geomoetyr

Given: LM || KN , KL || NM , LP = h­1 = 5 cm, MQ = h2 = 6 cm, PKLMN = 42 cm Find: Area of KLMN.

25. ## Mat222

Suppose that the functions S and T are define for all real numbers x as follow. s(x)=x-3 t(x)=3x+1 Write the expressions for (s-t)(x)and (s.t)(x) and evaluate (s+t(-2)

26. ## Social studies

How are capital resources used in production? A:They allow producers better access to world markets B:They make it possible to employ more skilled labor C:They provide tools that make production more efficient D:They purchase raw materials needed for

27. ## chemistry

the half time of a radioisotope is found to be 4.55 minutes. if the decay follow first order kinetics. what percentage of isotope will remain after 2.00 hours?

28. ## Algebra

30 is the product of Chrissy's height and 2.

29. ## Biology

A 2n cell has 23 pairs of chromosomes. At the end of Meiosis 1, how many individual chromosomes will each daughter cell have? ____ IS it 46?

30. ## math

Find the slope of the line through (-9,-10) and (-2,-5) A. -5/7*** B. 7/5 C. 5/7 D. -7/5

31. ## Math

Write an addition equation must have one two and a three digit addend and use all of these digits 662-228-8000

32. ## chemistry

What type of chemical reaction is this equation? CuO (s) + [2H+ + SO4 2-](aq) [Cu2+ + SO4 2-] (aq) + H2O (l)

33. ## definitions

define anti-urban define urban transformations DO NOT link me to any sites thanks

34. ## Math

In a state legislature there were 119 more members in the House of Representatives than in senate. If there were m members in senate, write an expression to represent the totial members in the state legislature. PLZ HELP!!!!!

36. ## Math

You rent x pairs of shoes for \$2 each. You buy the same number of drinks for \$1.50 each. You also pay \$9 for a bowling lane. Write an expression in simplest form.

37. ## Math

2. Estimate the radius of a circle with the circumference of 272.2 inches. Use 3.14 for pi. Round to the nearest tenth. a. 43.3 b. 136.1 c. (86.7) d. 5,887.2

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38. ## Chemistry

a group of grade three students, along with their science teacher, were outside the classroom observing plant species. upon observation, the students recognized that some plant leaves were very pale yellow and weak looking while some looked healthy.

39. ## Math

Solve the missing variable e^(x+6)+5=1

40. ## algebra

A copper conductor 130metrrs long hasa resistance of 4.30ohms. If the resistivity of a copper is 1.42*10ohms determine the cross sectional area of the conductor in mmsquared

41. ## physics

A 2.51 kg particle moves in the xy plane with a velocity of v = ( 4.98 , -3.58 ) m/s. Determine the angular momentum of the particle about the origin when its position vector is r = ( 1.73 , 1.15 ) m.

42. ## physics

A playground merry-go-round of radius R = 1.1 m has a moment of inertia of I = 280 kg*m^2. and is rotating at a rate of ω = 9 rev/min around a frictionless vertical axis. Facing the axle, a 37 kg child hops onto the merry-go-round and manages to sit down

43. ## Physics

A billiard ball 0.62 kg moving at 8.2 m/a elastically strikes a bowling ball, 3.2 kg moving in opposite direction at 1.2 m/s Calculate final velocities The kinetic energy before the collision The kinetic energy after the collision

44. ## Math - calculus

Suppose f(x)=x^p where p>1 and [a,b]=[0,1]. According to the Mean Value Theorem there is at least one number c such that f(b)−f(a)=f′(c)(b−a). In this particular case the number c is unique but it depends on p. c=____ Your answer will be in terms of

45. ## chemistry

Use the table of complex ion formation constants to calculate the molar concentration of free Fe^2+ in 0.510M aqueous solution of potassium hexacyanoferrate(II) K4(Fe(CN)6) at 25 degrees celsius. I know the answer is 1.96*10^-6 m, but I'm at a loss on how

46. ## Mathematics

Which shapes could this pentagon be decomposed into to find its area? Choose all that Apply. A) Three Triangles * B) Two Trapezoids C) Five Triangles ** D) One triangle and One Trapezoid *** (My answers are A,C and D).

47. ## Math

Graph the two functions below, determine if they wre inverses based off the graph. Explain f(x)=x^2-3,g(x)=square root x+3

48. ## Math

I have to estimate the area of a circle and use 22/7. The diameter of the circle is 28 cm.

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49. ## chemistry

How do you rationalize an infrared spectrum of salicylic acid and aspirin? How do you know which is which?

50. ## Social Studies

The Ottoman empire... only allowed Islam. persecuted Christians.

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51. ## Calculus

Harold is in an airplane that is flying at a constant height of 4505 feet away from a fixed observation point. Maude, whose eyes are 5 feet from the ground, is standing at this point and watching the plane; the angle between her line of sight (the line

52. ## Math/Algebra

Explain the composition of an algebraic expression, 3 sentences, an example

53. ## Trigonometric Identities

Triangle ABC is given where angle A=33 degrees, a=15 in., and the height, h, is 9 in. How many distinct triangle can be made with the given measurements. Please explain your answer

54. ## differential equation

i need help understanding this question? can some one tell me what exactly i have to do in it 7. Suppose a student carrying a flu virus returns to an isolated college campus of 1000 students. Determine a differential equation for the number of people x(t)

55. ## History/American Government

Find one difference between the Arizona state constitution and the US Constitution. Explain why you think this difference occurred.

56. ## social studies

what is a corporate farm? its part of a short answer and i cant find a definition that is easy for me to understand.

57. ## Physics

3 particles of masses m1 = 1.5 kg , m2 = 2.5 kg and m3 = 3.5 kg form an equilateral triangle of edge length l= 135 cm. Determine the center of mass of the system.

58. ## maths

a spinner is split into 3, red blue and yellow. you need to land on blue in the next 2 goes to win, what is the probability of losing?

59. ## ALGEBRA

equation in graphing form: f(x)=(x+3)^2+2 original equation: f(x)=x^2+6x+ 11 state the vertex??

60. ## Math

A book on Tameka's shelf weighs 3 (pounds). How many ounces does the book weigh?

61. ## Math

a school bus has 1000 students. on wednesday, 300 students went on a field trip. what percent the students did not go on the field trip.

62. ## Physics

Determine the amount of work required for each of the following: a) to lower a 35kg sack of rice through a height of 3.5m b) to carry the 30kg sack of rice 10m along a corridor c)to crave the sack of rice 15m along the corridor at a constant velocity

63. ## word problem

In 1994 the moose population in a park was measured to be 6400. By 1996, the population was measured again to be 6800. If the population continues to change linearly: Find an equation for the moose population, y,in terms of x, the years since 1994. Ive

Middle School Mathematics How can I write a question In words that could be answered using expression for each and a diagram. 3/4 ÷ 1/2 and vise versa 1/2 ÷ 3/4 OK so I found a sample but I just can't think how would I write it out for my problems.

65. ## maths

write down the first four terms of the following expansion (1+x)^1/4 stating in each case, the values of x for which the expansions are valid

66. ## science discussion

What evidence is there that the human species has been successful so far? Explain. What environmental pressures in the past do you think were most important in shaping the human species as it exists today? What environmental pressures exist now that you

3+√5/2-√5

68. ## Math

In an isosceles triangle,the shorter side is 20% shorter than the long sides.the perimeter is 15.4cm. how long is the shorter side?

69. ## Math

A college football coach wants to know if there is a correlation between his players' leg strength and the speed at which they can sprint 40 yards. He sets up the following test and records the data: Every day for a week, he counts how many times each

70. ## algebra

Isaac was 51cm when he was born. When he was 10, he had grown in length by 174% how tall was he?

71. ## Algebra

I need help with these Algebra problems in which I need to give the square and the cube of each expression in simplified form. 1. -2t^2k 2. 3rs^4 3. 5m^3n 4. -4x^2y^2

72. ## Math

A speed camera recorded 1637 speeders in six months. This represented 3÷1000 of all the cars that passed off the camera. How many cars passed the speed camera per day on average?

73. ## Geography

What was the goal of the philosophes? Did their movement have an impact on our lives today?

74. ## Chemistry

Neutralization of water containing H2SO4 and HNO3 with CaSO3. What is the pH in water if the volume is 1000 liter and the concentration of H2SO4 is 0,0013 M and concentration of H2SO4 is 0,0010 M ? And how much of CaCO3 is needed for neutralization of the

75. ## MATH

Jenny agreed to work for a year for \$9000 plus a motorcycle. At the end of 5 months, she left the job and received \$250 plus the motorcycle for her pay. What was the value of the motorcycle?

76. ## physics

a) a driver of mass 55kg needs to jump to a height of 1.1m above her take off height, at which point her speed needs to be 0.5m/s^. How fast just she be travelling the instant her feet leave the diving board? So we know eg=mgh =9.8*55*1.1 I assumed we're

77. ## Alex

Express x^3-4/x^2(x+2) into partial fractions

78. ## Math

A school has 1200 pupils of 3/4 of the pupils travel to school by bus how many of the pupils travel to school by bus

79. ## Percentage

If Safia have 10 percent more cookies than Rohit, how many percent fewer cookies does Rohit have than Safia?

80. ## Algerba

Solve for x. Round answers to the thousandths place. 3^x=17 5.667 2.579

81. ## Math

30 red socks, 22 gold socks and 14 black socks. How many socks would he have to pick up before getting a matching pair?

82. ## stats

The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today, November 11, 2009). Assume that the number of hours a worker spends doing

83. ## Maths

The difference between the digits of a two digit number is 1.The number itself is 1 more than 5 times the sum of its digits.If the units digits is greater than the tens digit,find the number.

84. ## Algebra

A triangle has a height that is 4 inches less than its base. If the triangle has an area of 86 square inches, set up and resolve an equation to find its base and height.

85. ## math

A rectangular closet is three feet longer than twice the width. The area of the closet is 65 square feet. Find the perimeter of the closet.

86. ## Math

nine kids and two adults are going to the circus. kids tickets are on sale for only half the price of adult tickets. the total cost was \$72. how much is one kids ticket. how much is one adult ticket

87. ## Science

For an experiment, you place 15 g of ice with a temperature of -10 degrees C into a cup and label it A. You also place 25 g of ice at the same temperature into another cup and label it B. Which of the following statements is true? A. The average kinetic

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88. ## Math

Anna is buying 2/5 of a pound of beans for dinner . Mercy is buying 7/4the amount of beans that Anna is buying how many pounds of beans is mercy buying

89. ## math

what is -3.5 + 17? The online calculator says 13.5 and I don't get how that is the answer. I got 14.5 and I am confused. Please help me and explain this to me

90. ## science

How are suspensions and solutions similar? How are they different? (can use a Venn diagram) I do not understand how these are similar.

91. ## English

1. I want to buy a plain bag. (What is a plain bag? Does it mean a bag without patterns?)

92. ## Biology

The p53 enzyme system prevents progression to which stage of the cell cycle? choices are: 1. G1 2.Cytokineses 3.S phase 4. Mitosis 5. G2 * I think it's S phase, It's not G1 right?

93. ## science

DNA is synthesized during which of the following stages of the cell cycle? Choose all that apply A.mitosis B.G2 C.S D.G1 E.interphase F. cytokineses I answered with A,C,E am I missing one? I am pretty sure I am

94. ## bio

Haploid (1n) cells are produced at the end of ___.CHOOSE ALL THAT APPLY A. meiosis 2 B.mitosis C.meiosis D.meiosis 1 I picked A, and D Am I missing one? I think I am

95. ## english

If you are very good with people, you have a high level of __________ intelligence.

96. ## Trig Identities

secx - sinxtanx

97. ## calculus

y' = 2y(1/2) , y(0) = 8 The function starts with y0 = 4 ,what is Euler’s method for computing yk+1 from yk with step size ∆t.

98. ## Geometry

Express answer in exact form. Find the area of the larger segment whose chord is 8" long in a circle with an 8" radius. (Hint: A chord divides a circle into two segments. In problem 1, you found the area of the smaller segment.) I've no idea how to do

99. ## Physics

Using Coulomb's law to solve: Charge A is +2.0x10^-6C and charge B is +3.0x10^-6C. The two changes are 3 m apart. What is the force between them?Is the force attractive or repulsive? Okay so here's what I have so far (2.0x10^-6)(3.0x10^-6)/(3)^2 It is

100. ## Geometry

What is the scale factor of the area 78in2/128in2? I know area is a2/b2. Now I took the square root and would that be my answer? Can you please do the square root because I get a looooong decimal. Thank you!

101. ## Calculus

The point on the parabola y=x^2 that is closest to the point (2,1/2) is (___,___). The distance between the two points is _______.

if m

103. ## Math

When drawing box and whisker plots, how do you know when you no longer need to draw the whiskers? For instance, in the following data points: 3,42,45,55,56,58,and 84, you do not need whiskers. However, in the data points: 12,35,37,41,53,58,59,91, you do

104. ## Science

anatomical differences of humans What possibilities and/or dangers does this difference imply for humans from other animals? Use the arms and hands

105. ## gerund phrases

1. identify the gerund phrase(s) 1.Setting turquoise stones in silver is a common jewelry-making practice. setting turquoise stones

106. ## calculus

in your own words, describe how limits can be used to find the instantaneous rate of change of a function.

107. ## Pre-Cal/Trigonometry

Triangle ABC is given where angle A=64 degrees, a=16 in., and the height, h, is 15.3 in. How many distinct triangles can be made with the given measurements? Please explain your answer to your best ability

108. ## History

What weapon/technology would be the most beneficial during WW1? Trench warfare, machine guns, field guns, rifles, poison gas, flame thrower, aircraft, tanks, U-boats, or battleships? I'm not sure but I eliminated trench warfare, flame throwers, aircraft,

109. ## Algebra 2

What is the intersection of a cone and a plane parallel to a line along the side of the cone? Provide mathematical examples to support your opinions. You may use equations, diagrams, or graphs to organize and present your thoughts. You are encouraged to

110. ## social studies homework

3. What happened as a result of a meeting between A. Phillip Randolph and Franklin Roosevelt? (l point) I truly have no idea what this answer could be, I looked all through the lesson and found nothing. Can someone either help me by steering me in the