# Alice

Newest questions and responses by Alice
1. ## Math

Ty received test grades of 73%,82%,73%,77%, and 77%. a) what grade would he need to make on the sixth test to get a "C" if a "C" is at least 75% but less than 80%? b) Is it possible for Ty to get a B or better for his test average (at least 80%)? ANSWERS:

2. ## Math

four times the sum of three consecutives odd integers is the same as 221 more than 5 times the largest integer. Find the integers

3. ## Calculus

Find the value of f on the top "9" on the bottom "1" x^2dx using four rectangles of equal width, with each left end-point used to find the height of each rectangle. a) 2(1+9+25+49) b) 2(9+25+49+81) c) 0.5(1+9+25+49) d) 0.5(9+25+49+81)

4. ## Calculus

Use two rectangles of equal width to estimate the area between the graph of f(x) = x - cos(πx) and the x-axis on the interval [1, 5]. Evaluate the function at the mid-point of each rectangle to find each height. a) 8 b) 12 c) 16 d) 20 thank you in

5. ## Calculus

The position equation for a particle is s(t)=√t^3+1 where "s" is measured in feet and "t" is measured in seconds. Find the acceleration of the particle at 2 seconds A) 1ft/sec^2 B) 2/3 ft/sec^2 C) - 1/108 ft/sec^2 D) None of these

6. ## math

On Saturday, the fruit and juice bar was selling 25 glasses of fruit punch an hour. By 3 p.m., they had sold 125 glasses. If their goal was to sell more than 300 glasses of fruit punch, find the number of hours, h, they must stay open to make their goal.

7. ## Calculus

Use a graphing calculator to graph f(x)=(2x^2-8)/(x^2-6) and then select the response which is true a) f increases without bound b) f has no tangent line c) f has a horizontal tangent line d) none of these responses

8. ## Calculus

If f(x) is a continuous function defined for all real numbers, f(-1)=1, f(-5)=-10, and f(x)=0 for one and only one value of x, then which of the following could be that x value? a) -6 b) -5 c) -4 d) 0

9. ## Calculus

the local linear approximation of a function f will always be greater than or equal to the function's value if, for all x in an interval containing the point of tangency, f'(x)

10. ## Calculus

Which of the following is the best linear approximation for f(x)=cos(x) near x= π/2 ? a) y= x - π/2 b) y= -x + π/2 c) y= -x + π/2 + 1 d) y= x - π/2 +1

11. ## Calculus

If f is continuous at x=c, then f is differentiable at x=c True False

12. ## Calculus

Which of the following is the best linear approximation for f(x)=cos(x) near x= π/2 ? a) y= x - π/2 b) y= -x + π/2 c) y= -x + π/2 + 1 d) y= x - π/2 +1

13. ## Calculus

If f is continuous at x=c, then f is differentiable at x=c True False

14. ## Calculus

If f(-1)=-3 and f'(x)=(4x^2)/(x^3+3), which of the following is the best approximation for f(-1.1) using local linearization? a) -7.2 b) 2.8 c) -1.2 d) -3.2

15. ## Calculus

A particle moves along the x-axis so that at time t its position is given by s(t)=(t+3)(t-1)^3,t>0. For what values of t is the velocity of the particle decreasing? a) 00 d) The velocity is never decreasing. Thanks in advance.

16. ## Calculus

If the space below, provide the smaller of the two positive integers that add 30 and have the largest possible product. Numerical Answers Expected!

17. ## Physics

A person of weight 820 N stands on one leg. The area of the foot in contact with the floor is 1.4 X 10^-2 m^2 a. Calculate the pressure exerted by the foot on the ground. b. Explain what would happen to the pressure exerted on the floor if the person

18. ## Science

At which position does the diver have the most gravitational potential energy? A.) 1 ( in diving board about to jump off, in a squatting position with hands above head) B.) 2 (In air, just after jumping off. Hands above head) C.) 3 ( About to head into the

19. ## Calculus

Select the best answer below: lim x→∞ [ln(|x|-1)] / (cos(x))^x a) does not exist b) 1 c) -1 d) 0 Thank you very much for your helppppp in advance

20. ## Calculus

Evaluate lim x→1 f(x) for f(x)= 5x-10,x1 Possible answers: a) 3 b) -5 c) 1 d) does not exist

21. ## Calculus

Which of the following must be true for the graph of the function f(x)= (x^2-25)/5x-25) There is: I. a removable discontinuity at x=5 II. a vertical asymptote at x=5 III. an infinite discontinuity at x=5 possibles answers: a) I only b) II only c) III only

22. ## Calculus

If lim x→0 f(x)=3 and lim x→0 g(x)=1, then find lim x→0 (f(x)+g(x))^2 a) 40 b) -4 c) 16 d) 28

23. ## Calculus

which of the following are continuous for all real values of x? I. f(x)= (x^2+5)/x^2+1 II. g(x)= 3/x^2 III. h(x)=|x| a) I only b) II only c) I and II only d) I and III only

24. ## math

The sum of Lisa's age and Myra's age is 19. In 10 years, Lisa will be 5 years older than Myra. How old is each girl now?

25. ## Physics

a stone is release from a catapult with a speed of 50m/s attain a height of 100m/s .Calculate the time of flight

26. ## Social Studies

“Do not put such unlimited power into the hands of the husbands. Remember, all men would be tyrants if they could. If particular care and attention is not paid to the ladies, we are determined to foment a rebellion, and will not hold ourselves bound by

27. ## Chemistry

Describe how a mixture of acetanilide and sand can be separated

28. ## Chemistry

In recrystalization of acetanilide if your percentage yield is greater than 100% how would this occur?

29. ## Chemistry

During recrystalization of acetanilide, an orange solution of a compound in hot alcohol was treated in activated carbon and then filtered through a filter paper. On cooling the filtrate gave gray crystals, although the compound was reported to be

30. ## Maths

Of 20 girls 16 plays hockey,12 plays tennis and 4playsbusket every girl plays at least one game and 2plays all the three games how many plays 2and only 2games

31. ## Algebra

Find the solutions to the system. y=x^2+5x+6 y=4x+12 A. (2,20) and (-3,0) B. (2,20) and (-3,-18) C. (-2,-20) and (-3,-18) D. no solutions Find the solutions to the system. y=x^2-3x-1 y=8x-1 A. (0,-1) and (11,388) B. (0,-1) and (11,87) C. (-1,0) and (87,11)

32. ## math

A car travels 56km using 8litres of petrol. What distance will it travels with 13litres of petrol.

33. ## Math/Calculus

The region R is bounded by the x-axis, x = 2, and y = x^2. What expression represents the volume of the solid formed by revolving R around the line x = 2? It seems that I'm not allowed to post images, so I will try to type out my answer: ∫[0, 4] π *

34. ## Algebra

this isn't the same question as my last post!! it's the second out of three. Hello! I'm looking over one of my tests and trying to see how to do things I got wrong, but I'm having trouble with three of the questions. Here's one of them: Find the simplified

35. ## Algebra

Hello! I'm looking over one of my tests and trying to see how to do things I got wrong, but I'm having trouble with three of the questions. Here's one of them: A \$1,600.00 principle earns 7% interest, compounded semiannually twice per year. After 33 years,

36. ## math

Melissa has 1/2 as much money as Paul. Tom has 3/5 as much money as Melissa. If Paul has \$42 more than Tom, how much do the three children have altogether?

37. ## Chemistry

When one mole of CH3OH (l) forms from its elements at 1 atm and 25 degrees C, 238.6 kJ of heat are released, and 35.2 kJ are released when one mole of the gas condenses. How much heat is released when one mole of CH3OH (g) forms from its elements at these

38. ## government

i need to write a research paper on healthcare. Ive been looking for two (at most two week old) reliable sources that really grasps the current status of the issue. any help?

39. ## A B C order

Does "brother's" come before "brothers' " in A B C order?

40. ## chemistry

If delta G (Gibbs) is positive and you are trying to find at what temperature the reaction is spontaneous would the formula be: T< H/S ? G=H-TS H-TS>0 T< H/S then the temperature found would be the temp at which the reaction is spontaneous?

41. ## Science

Hi, I need help with 2 questions!  Which type of underground magma formation is usually dome shaped? dike laccolith sill batholith Laccolith is my answer. Scientists want to protect a beach from erosion. What can they do? I don't know this one. I am not

42. ## Chemistry

PART A) Suppose that 6.9 mL of 2.5 M KOH(aq) is transferred to a 250 mL volumetric flask and diluted to the mark. It was found that 32.8 mL of this diluted solution was needed to reach the stoichiometric point in a titration of 6.9 mL of a phosphoric acid

43. ## Physics

A projectile is propelled along the x-axis. During 5.2 s it moves from position 64 m to position −40 m. Find its average velocity.

44. ## Algebra

Find all complex solutions (real and non-real) x^4+2x³+22x²+50x-75=0

45. ## physics

A motor car of mass 30kg,moving with a velocity of 10m/s. by the application of brakes,it was brought to rest at a distance of 25meters. Find the average force.

46. ## Calculus

Suppose the height of an object fired straight up from the level ground is given by s(t)=300t-4.9t where s is measured in meters and t is measured in seconds. how fast is the object moving up as it leaves the ground after 2 seconds? find the average

47. ## Math

if you play soccer in a street 9 meters wide and you put the goals 12 meters apart what is the lenght of a soccer pitch if the street is a 1:10 scale of a normal soccer pitch.

48. ## Math

If a boat in a bottle is an exact replica and has a sail height of 2 inch,while the real version of the boat has a sail height of 48 ft.What is the scale of the replica to the real boat?

49. ## Math-Ratio and Proportion

The scale of a die cast model car is 4:13.If the real car has a length of 177 inches and a height of 59 inches.How tall is the die cast model?

50. ## Chemistry

Convert 9.45 μm to inches.

51. ## Chemistry

The men\'s world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.450 miles? (1 mi = 1609 m.)

52. ## Chemistry

The speed of light in a vacuum is 2.998 × 10^8 m/s. What is its speed in miles per minute (mi/min)? Please explain the steps you used.

53. ## Chemistry

If your front lawn is 25.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1150 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour? Assume an average snow flake has a mass of 1.90 mg. Please

54. ## Algebra

For the Function f(x)=2x²−2x+6, simplify problems A) & B) A) f(x+h) B) (f(x+h)−f(x))/h Please explain the steps you used.

55. ## Algebra

Find the average rate of change of f(x)=6x²−3 on the interval [2,a]. Your answer will be an expression involving a What I did so far: I found f(2) which is 21 and that would make the function (2,21) Then, I found f(a) which is 6a^2-3 and that would make

56. ## Psychology

Would this be a better example of spotlight theory of attention or attenuation theory? I was focusing on asking someone an important question. When I asked the question, I failed to noticed that a dog was barking. I later realized the dog was barking. I

57. ## Psychology

Would this be an example of top-down processing? I am at home, and I have left a room where a family member is sitting. I come back to this room awhile later and start having a conversation because I expect the family member to still be there because I did

58. ## Psych

Is this an example of top-down processing? I heard a noise that sounded like a door opening and assumed my parent was home. I made this assumption based on the fact that it was the time of day that they would usually come home and that they sent me a text

59. ## Multiplevariable calculus

Hello, I have to find the volume of the region enclosed by the paraboloid z=(x^2)+(y^2) and the planes z=1 and z=3 , so well i am struggling about the limits of each integral. I know that I can use cylindrical coordinates, but what about the limits in z? I

60. ## social studies is this correct?

how was the roman republic's goverment set up? people elected representatives to make decisions for them. the emperor chose leaders to run the government for him people voted directly on laws and issues****** voters chose the emperor from former government

61. ## History

How have the lives of African Americans changed over the last 150 years and how has that transition mirrored broader shifts in American society?

62. ## Math

Frank bought supplies for school. In the first store, he spent half of his money plus \$10. In the second store, he spent half of what he had left, plus \$10. In the third store, he spent 80% of what he had left. He came home with \$5. How much did he start

63. ## Physics

Hello, I am wondering if someone can answer me this question: In an Atwood machine why do the tensions that handle both bodies are the same? (English is not my native language)

64. ## Math

A lemonade machine with a cash price of \$4000.00 is purchased on an installment plan with a\$460.00 down payment and 13 monthly payments of 272.31. What is the amount financed

65. ## Ms. Sue

how old are you Ms. Sue?

Tom, Dick, and Harry are three brothers and have \$107.60 together. Tom feels sorry for hairy because he has less money than Tom. So Tom gives harry \$2.10 so they both will have the same amount after the transfer. Dick doesn't know about Tom's gift and he

67. ## Math

A jar contains 5 blue marble, 8 red marbles, 4 white marbles,and purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Choosing a blue marble, putting it back, then choosing a purple? (Simplest form)

Hello! I am struggling with this problem: Find the Taylor Series for sin(x-2) centered at c=3. My work so far: sin(1)+(x-3)cos(1)-(1/2)(x-3)^2sin(1)-(1/6)(x-3)^3cos(1)+(1/24)(x-3)^4sin(1)... I know that the Taylor series for sign is typically: the

69. ## Pre-Algebra

Which equation models the linear relationship in the table below? x y -4 10 1 -5 6 -20

70. ## Pre-Algebra

Given a cylinder and a cone with the same base and the same height Cylinder: r=4 ft and h=3 ft Cone: r=4 ft and h=3 ft What is the volume of the cone in cubic feet? A. 12 π B. 16 π C. 36 π D. 48 π

71. ## Pre-Algebra

There are about 3x10^20 gallons of salt water on the earth, while there are about 6x10^18 gallons of fresh water. About how many times the amount of fresh water is the amount of salt water? A. 2 TIMES B. 50 TIMES C. 200 TIMES D. 500 TIMES

72. ## Pre-Algebra

Martha is in a hot air balloon that has risen straight up from the launch point. Matthew is standing on the ground, 16 meters away from the launch point. If Martha and Matthew are 20 meters apart, how high has the balloon risen? A. 4 meters B. 12 meters C.

73. ## Statistics

Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from \$2.85 to \$3.84. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample

74. ## calculus

Evaluate the integral. (Remember to use absolute values where appropriate. Use C for the constant of integration.) (x^2−x+12)/(x^3+3x) dx

75. ## Calc

The figure (which is not pictured, sorry) shows the slope field for y =.2(9-y^2). Make a sketch of the solution using the initial value y(-4)=-2. Find the function f(x) that this solution curve is approaching as x-->infinity. I need help with finding the

76. ## Calc

The time interval T, in minutes, between patient arrivals in an emergency room is a random variable with exponential density function p(t) = 0:125e^-.125t. What is the average time between patient arrivals? What is the probability of two patients arriving

77. ## calculus

Evaluate the integral. from 0 to π/2 sin^3(θ)cos^5(θ) dθ

78. ## Chemistry

indicate whether the following would increase decrease or have no effect on the solubility of copper (ii) carbonate (ksp - 2.5 x 10^-10) when compared to the solubility of water 1. dissolve it in an acidic solution 2. dissolve it in ammonia, forming a

79. ## AP chem

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H an explanation/step by step would be nice because i keep getting wrong answer from the H+ & H2O (they are both suppose to be 12 according to

80. ## Physics

A square-shaped loop carries current I. What is the magnitude and the direction of the magnetic field at point P, which is located on the bottom segment of the loop? Each side of the square loop has length d. The answer should be given in terms of d, I,

81. ## Maths

The scale on a map is 1:200 000. Work out the number of kilometres represented by 2.5 cm on the map. I've never done a question like this before. If you can help I would be really grateful.

82. ## Calc

Use a comparison test to determine if the integral from 8 to infinity of sin^10(x)e^(-x) converges or diverges? I am stuck on what to use to compare. Any help is appreciated! Thank you! I was thinking -1

83. ## Math

The fruit plants in my garden do not bear fruit during their first summer. The fruits are picked for the next two years and then the plants become too woody and need to be pulled up. Occasionally some of the die over winter. The last five years I had fruit

84. ## Math

The fruit plants in my garden do not bear fruit during their first summer. The fruits are picked for the next two years and then the plants become too woody and need to be pulled up. Occasionally some of the die over winter. The last five years I had fruit

85. ## Math

Find the fifth term in the expansion of (4-1/5x)^9 in ascending powers of x

86. ## Aice Math

The binomial expansion of (5-x/2)^6 is 15625 + px+qx^2+... Find the value of "p" and the value of "q"

87. ## Math

In the expansion of (x^2-b/x)^4, the coefficient of x^2 is 294. Find the value of the constant "b"

88. ## Calc

The base of a solid is the unit circle x^2 + y^2 = 4, and its cross-sections perpendicular to the x-axis are rectangles of height 10. Find its volume. Here's my work: A for rectangle=lw A=10*sq(4-x) V= the integral from -4 to 4 of sq(4-x^2)*10dx But that

89. ## Algebra

Moshe would like to get tickets for President inauguration. It will take him 20 years. He decides to pay \$200 the first year and the increase his payment by \$60 each year. a) How much did he pay in the last year? b) How much did he pay altogether for the

90. ## Algebra

Scholmo reads 7 pages of his book on the first day and his rate of reading then goes up by 3 pages each day. a) How many pages will he have read on the 8th day? b) After how many days will he have read more than 425 pages?

91. ## Algebra

Factor each: f(x)= x^3 + 7x^2 + 10x f(x)= 5x^3 -19x^2 - 4x

92. ## Math

Mary has a third of the money Erin has. Erin has \$8 less than John. Together they have \$267. How much money does each of them have?

93. ## Physics

Capacitor c1 and c2 are 4f and 2f respectively are charged as series combination across 100v battery. The two capacitors are disconnected from each other.They are connected +ve plate to +ve plate and -ve plate to -ve plate.calculate the resulting charge on

94. ## math

four times a number plus three times the sum of a number and four is equal to negative nine

95. ## precalculus

Can you please check these answers. In exercises 10-13 , find (a)2v+u, (b)u-3v), and (c)5u-v. 10.u=, v= a) 2v+u =

96. ## precalculus

Is this correct if not could you explain how to make it correct? find (a)2v+u, (b)u-3v), and (c)5u-v. u=i-j v=6i+9i a. 2v+u u=i-j, v=6i+9i =(12i+18j) + (i-j) =13i+ 17j b. u-3v (i-j)-(18i+27i) -17i - -26j c. 5u-v (5i-5j)-(30i+54j) -25i - -59j

97. ## Spanish Linguistics

Explique la ambigüedad y dibuje los diagramas correspondientes a cada posible interpretación de cada oración. 1.Juan trajo un mapa de Italia. 2.Un hombre alto golpeo a una mujer con un bolso.

98. ## Organic Chemistry 2

The typical % yield for the reduction of 9-fluorenone using NaBH4 to obtain 9-fluorenol is 80%. In my experiment I obtained 89 %. Can you explain the reasons why my yield is higher? Is it better to obtain a higher yield or a lower yield than the expected