# Posts by Amanda

Total # Posts: 2,621

1. ### physics

A uniform disk with mass m = 9.42 kg and radius R = 1.31 m lies in the x-y plane and centered at the origin. Three forces act in the +y-direction on the disk: 1) a force 315 N at the edge of the disk on the +x-axis, 2) a force 315 N at the edge of the disk on the –y-axis...
2. ### Math

A park has a rectangular playground area that has a length of 66 feet and a width of 42 feet. the park departmen material to enclose the playground area?
3. ### Math

Roman saves \$500 each year in an account earning interest at an annual rate of 4% compounded annually. How much interest will the account earn at the END OF THE FIRST THREE YEARS? I think I am confusing simple and compounded interest. The answer I got was \$123.23 Am I waaaaaay...
4. ### MATH- APR of a loan

The owner of an automobile repair center purchased new electronic diagnostic equipment for \$12,000. He paid down and then paid 60 monthly payments of \$242.81. Determine the APR of the loan to the nearest one-half of a percent.
5. ### physics

4. A train car with mass m1 = 684 kg is moving to the right with a speed of v1 = 7.2 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at vf = 4.4 m/s. b) Now the same two cars are involved in a second ...
6. ### physics

A mass m = 17 kg is pulled along a horizontal floor with NO friction for a distance d =5.4 m. Then the mass is pulled up an incline that makes an angle ? = 32° with the horizontal and has a coefficient of kinetic friction ?k = 0.36. The entire time the massless rope used ...
7. ### physics

A mass m = 88 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 15.5 m and finally a flat straight section at the same height as the center of the loop (15.5 m off the ground). Since the mass would not make it around the loop if ...
8. ### physics

A block with mass m = 17 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4201 N/m after being compressed a distance x1 = 0.556 m from the spring’s unstretched length. The floor is frictionless except for a rough patch a distance d...
9. ### physics

A mass m = 14 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4884 N/m. The floor is frictionless except for a rough patch. For this rough path, the coefficient of friction is ?k = 0.52. The mass leaves the spring at a speed v = 2.9 m/s. 1...
10. ### Algebra

Thank you very much
11. ### Algebra

Find the exact value of sin(u/2), cos(u/2), and tan(u/2) using the half-angle formula, given that cscu = -5/3 and ? < u < 3?/2
12. ### physics

You spot a plane that is 1.63 km north, 2.3 km east, and at an altitude 5.2 km above your position. 1) At what angle from due north (in the horizontal plane) are you looking? ( ) °E of N 2) Determine the plane's position vector (from your location) in terms of the unit...
13. ### physics

You spot a plane that is 1.63 km north, 2.3 km east, and at an altitude 5.2 km above your position. 1) How far from you is the plane? 2) At what angle from due north (in the horizontal plane) are you looking? 3) Determine the plane's position vector (from your location) in...
14. ### physics

Rewrite the following vectors in terms of their magnitude and angle (counterclockwise from the +x direction). 1) A displacement vector with an x component of +9.5 m and a y component of -9.6 m. magnitude: 2) angle: 3) A velocity vector with an x component of -96 m/s and a y ...
15. ### Honors English 11 (PLEASE HELP!)

I would give you the answers, but it is cheating, and plus if your in honors you should know this, perhaps you should go back to standard english now?
16. ### pre-calculus

A pilot wishes to fly on course 290 with an air speed of 300 knots when the wind blows from 224 at 18 knots. Find the drift angle to the nearest hundredth of a degree.
17. ### physics

A blue ball is thrown upward with an initial speed of 21.0 m/s, from a height of 0.8 meters above the ground. 2.6 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.3 m/s from a height of 24.6 meters above the ground. The force of ...
18. ### physics

1) The figure below shows the position of a particle versus time, with each line on the vertical axis representing 4.6 m. Find the average velocities for the time intervals a, b, c, and d indicated in the figure. 1. ___________ m/s (time interval a) 2) __________ m/s (time ...
19. ### SCIENCE

SOME ONE PLEAS HELPPPP MEEE The breaking down or disintegration of substances such as rocks and minerals by physical, chemical, or biological processes is called- * 1 point A Erosion C Climate D Deposition 2. When particles carried by water, ice, or wind are dropped in ...
20. ### algebra 1

Soda is on sale for \$0.75 a can, and you have a coupon for \$0.50 off your total purchase. write a function rule for the cost of n sodas, how much would 10 sodas cost? A.C(n)=0.5n-0.75;\$4.25 B. C(n)=0.75n-0.5;\$7.00** C C(n)0.5n-0.5;\$4.50 D C(n)=0.75n;\$7.50
21. ### algebra 1

thank you so much Damon !!!
22. ### algebra 1

Suppose that the function f(x)=6x+4 represents the number of cars that drive by in x minutes. how many cars will drive by in 10 minutes? A. 60 B. 100** C.46 D.64
23. ### U.S history

There wasn’t a text for me to go by .? If that’s what your asking I’m confused a little ? Sorry
24. ### U.S history

I need help fast it’d supposed to be done today but no one has been able to tell me the answer. I’d really appreciate it . Thanks you guys . So much !
25. ### U.S history

Which of he following was an effect of the Missouri compromise ? A. Western Territories could only enter the union if they permitted slavery B. There were more senators in Congress from Free states then slave states C. Missouri enter the union as a slave state and Maine ...

thank you!
27. ### PreAlgebra

A square playground has an area of 1500 ft.² Find the length of one side of the playground to the nearest 10th of a foot
28. ### Maths set

There 70 women in a club. 20 play volley ball only ,10 play basketball only , 6 play tennis ball only. 4 play all the games and an equal number play two games only. Illustrate this information in a Venn diagram. Find the number of women who play volleyball.
29. ### Science

Why does pressure change with elevation and depth
30. ### math

\$4600 at 6% annual interest for a year. How much would he pay
31. ### math

hat is the range of the scores for Craig? _____ Team | Bowling Scores Member | Game 1 | Game 2 | Game 3 Bob | 92 | 118 | 105 Craig | 127 | 101 | 96 Kim | 131 | 128 | 122 Nancy | 127 | 109 | 115 Phillip| 113 | 109 | 122

Thank you!
33. ### math

Hi again. I don't understand these two questions so um please help me. Also explain me how to do it. Please 1. An electrician charges \$40 to come to your house. She also charges \$55 for each hour that she works. The electrician charges you a total of \$190. How many hours ...

kk thanks
35. ### math

THANKS YOU ARE A LIFE SAVER question: how did you get the number 4? I understood how you got 10x but how did you get the number 4? Help me
36. ### math

Also it's 7x minus 4 and an 1/2 If you are confused about the other equation
37. ### math

Simplify this expression. (3x+1/2) + (7x-4 1/2) How do you this? Thanks.
38. ### English

Is this sentence complex compound or simple? The question is, when water evaporates from the sea it becomes fresh water
39. ### Algebra

What is 4-y in a algebraic expression
40. ### Algebra

Ann sleeps 8 hours per night. Wrote an expression for the number of hours Ann sleeps in n nights
41. ### Algebra

Ann sleeps 8 hours per night. Write an expression for the number of hours Ann sleeps in n nights
42. ### Calculus

The prompt for all of these question is "consider the function f(x) = sin^2(x)". Part A: Write the first four terms of the Maclaurin series for f(x). I assumed this implied non-zero terms, so I found x^2-(1/3)x^4+(2/45)x^6-1/315(x^8). I am fairly confident about this...
43. ### English

which of the following terms best describes the actions of the husband in the short story "another evening at the club?" *violent** *supportive *confused *patronizing
44. ### Math

A soccer team won three fourths of its games. The team won 18 games. How many games did the team play?
45. ### Psychology

Miranda is a 23 year-old female who presents with symptoms of anxiety. She is dressed in baggy clothes and appears to be very thin. Miranda states that she worries a lot about her weight. Her father is obese, and she says that she does not want “to end up like him.” ...
46. ### Math

You have a phone plan where mins are 25cents a piece you have a balance of 13.67 how many mins can you talk on the phone
47. ### Physics 1401

An ideal meter stick is balanced on a pencil which is at the 60 cm mark. A 6 gram mass sits at the 90 cm mark. What is the mass of the meter stick? Again, I have the answer and it is 18g. I have no clue where to even begin with this questions. Thank you in advance.
48. ### Physics 1401

An ideal meter stick is balanced on a pencil which is at the 60 cm mark. A 6 gram mass sits at the 90 cm mark. What is the mass of the meter stick? Again, I have the answer and it is 18g. I have no clue where to even begin with this questions. Thank you in advance.
49. ### Physic sucks 1401

An Atwood's machine is built from m1=1kg and m2=2kg. The massless string is passed over a frictionless massless pulley. When the system is released from rest, what is the tension in the string? The answer is 68, this is for my finals review And my professor said the ...
50. ### Physics 1401

A 30 N object I a hung from a scale and dunked in water (density of 1000 kg/m^3), the measurement on the scale is only 20 N. what is the density of the object? Answer is 3000 kg/m^3, can someone show me how? Would be very appreciated.
51. ### Precalculus - check answer

The rate of U.S. per capita sales of bottled water for the period 2000-2010 could be approximated by s(t) = ?0.18t2 + 3t + 15 gallons per year (0 ? t ? 10), where t is time in years since the start of 2000. Use a Riemann sum with n = 5 to estimate the total U.S. per capita ...
52. ### Precalculus

The rate of U.S. per capita sales of bottled water for the period 2000-2010 could be approximated by s(t) = ?0.18t2 + 3t + 15 gallons per year (0 ? t ? 10), where t is time in years since the start of 2000. Use a Riemann sum with n = 5 to estimate the total U.S. per capita ...
53. ### Precalculus

Thank you so much, especially for that website!!
54. ### Precalculus

Find the area of the indicated region: Between y = x2 ? 5x + 3 and y = ?x2 + 5x ? 5 for x in [0, 4]. I keep ending up with 16/3, but this is incorrect.
55. ### Pre-Calculus

Annual sales of fountain pens in Littleville are 2,000 per year and are increasing by 10% per year. How many fountain pens will be sold over the next five years? Use an integral to solve this problem. I just need help setting the problem up - thank you!
56. ### Physics 1401

An Atwood's machine is built from m1=1kg and m2=2kg. The mass less string is passed over a friction less, mass less pulley. When the system is released from rest, what is the tension in the string?
57. ### chemistry

If you titrated 50 mL of HCl and 50 mL H2SO4, each of the same molarity, with NaOH. What is the numerical ratio of the volume of NaOH required for HCl compared to that for H2SO4?
58. ### Chemistry

Oxalic acid , HOOCCOOH (aq) , is a diprotic acid with Ka1= 0.0560 and Ka2=0.0145. Determine the [-OOCCOO-] in a solution with an initial concentration of 0.139 M oxalic acid. HOOCCOOH(aq) = HOOCCOO-(aq) + H+(aq) HOOCCOO-(aq) = -OOCCOO-(aq) + H+(aq) I have tried a ICE diagram: ...
59. ### Chemistry

Oxalic acid , HOOCCOOH (aq) , is a diprotic acid with Ka1= 0.0560 and Ka2=0.0145. Determine the [-OOCCOO-] in a solution with an initial concentration of 0.139 M oxalic acid. HOOCCOOH(aq) = HOOCCOO-(aq) + H+(aq) HOOCCOO-(aq) = -OOCCOO-(aq) + H+(aq) I have tried a ICE diagram: ...
60. ### Math ASAP

Yea I think it's c as well .
61. ### Chemistry

Please help. I have tried this a few different times and have come up with the same answer. What is the pH of the solution if 0.01 of HCl is added to a buffer containing 0.013 mol of RCOOH and 0.035 mol of RCOONa (source of RCOO-)? Ka = 2.7E-5 so far i have tried the following...
62. ### Precalculus - check

Yes, that's what I meant. :) Thank you both!
63. ### Precalculus - check

Find the derivative of the function. r(t) = log_4(t + sqrt(t)) My answer (sorry, it's messy): (1+(1/2sqrt(t)))(1/tln(4)+sqrt(t)ln(4))

Thank you!
65. ### Precalculus

An offshore oil well is leaking oil and creating a circular oil slick. If the radius of the slick is growing at a rate of 4 miles/hour, find the rate at which the area is increasing when the radius is 7 miles. (The area of a disc of radius r is A = ?r2.)
66. ### Precalculus

If f and g are functions of time, and at time t = 3, f equals 8 and is rising at a rate of 3 units per second, and g equals 5 and is rising at a rate of 8 units per second, then the product fg equals __ and is rising at a rate of __ units per second. I got 40 for the first ...
67. ### Statistics

Consider the population (1,3). Suppose you take all possible samples of size n=3 with replacement. What is the sampling distribution of the sample total?
68. ### Statistics

The weight of a randomly selected shipping container follows an unknown distribution with mean 12 tons and standard deviation 2 tons. Your cargo ship always carries a load of 100 randomly selected shipping containers. a. What is the probability the load weighs more than 1,231 ...
69. ### Statistics

LED light bulbs are manufactured with an average life span of 16 years and the bulb lifespans are known to follow an exponential distribution. a. What is the probability that a bulb will last longer than 14 years? b. What is the 50th percentile (or median) of bulb lifespans?
70. ### Precalculus

Johnny's Tumblers sells plastic cups in bulk for start-up restaurants. Their cost for producing these is modeled by: c(x) = 0.02x^2 + 0.5x + 40 a) Since the marginal cost is found by taking the derivative, the formula for c'(x)= ? (My answer: 0.04x + 0.5) b) The ...

Thank you!
72. ### Precalculus

Evaluate the given expression: d/dx[5(x^2 + 3|x|)] Any help with this is appreciated!
73. ### Chemistry

I am having trouble getting the right answer for this question please help. Calculate Kc for the FeSCN2+ formation equilibrium [FeSCN2+] = 3.49x10^-5 M [Fe3+] = 4.39x10^-4 M [SCN-] = 1.93x10^-4 Kc = [FeSCN2+] / ([Fe3+]-[FeSCN2+]) * ([SCN-] - [FeSCN2+]) I keep getting 546.266 M...
74. ### Chemistry

what mass of h2o is formed when h2 reacts with 384g of o2?
75. ### Chemistry

Use the concentrations and volumes of hydrogen peroxide and KI before mixing (Table 1), calculate the post-mixing concentrations. Before mixing: [H2O2] = 0.88M [KI] = 0.500M Table 1: before mixing 1. Vol H2O2 = 4.0 mL, [H2O2] = 0.88M 2. Vol KI = 1.0 mL, [KI] = 0.500 M units: M...
76. ### 8th Social studies

They have helped me very much.
77. ### 8th Social studies

I can see you guys are not very helpful that's why jisksha sucks. If you want some help you go to quizlet or brainly these are really helpful websites they are way better that jiskha.
78. ### SS

I just took the test and the correct answer is A.
79. ### Chemistry

Calculate the expected freezing point of a solution of 0.579 g pelargonic acid in 4.225 g of lauric acid, if the melting point of pure lauric acid was measured to be 43.20*C. (MM pelargonic acid = 158.2 g/mol; MM laruic acid = 200.32 g/mol). Kf for lauric acid is 3.90*C/Mc; ...
80. ### Chemistry

Element X has a face-centered cubic unit cell structure. If the density of the element is measured to be 12.4 g/cm^3, what is the atomic radius of X? units are in pm (picometers) I can't seem to find how to get the atomic radius with only the density given for an unknown ...
81. ### physics

How did Damon get 9.81 meters/second?
82. ### Science

If one sound registers one decibel more than another, then it is ____ times as intense? Round your answer to three decimal places.
83. ### Math

I have 100 bucks to buy 100 fruits. The fruits which I need to buy are- mango; which is 20 piece for 1 buck, lichi; which is 1 piece for 1 bucks and coconut; which is 1 piece for 5 bucks. How many each of those fruits do I have to buy to get this result-100 fruits for 100 bucks?
84. ### Math

I have 100 bucks to buy 100 fruits. The fruits which I need to buy are- mango; which is 20 piece for 1 buck, lichi; which is 1 piece for 1 buchan and coconut; which is 1 piece for 5 bucks. How many each of6the fruits do I have to buy to get this result-100 fruits for 100 bucks?
85. ### History

J answers are correct thanks so much !
86. ### math

Richard is 6 years older than Lisa, and in 5 years the sum of their ages will be twice as much as the sum of their ages 4 years ago. Find their present ages.
87. ### Math

Oh reiny this was such a big help you have no idea thank you so much
88. ### Math

Can someone please help me with my open needed question Solve the system by substitution -X-y-z= -8 -4+4y+5z =7 2X+2z= 4
89. ### maths trigonometry

Expand the following using compound angle formulae Sin(m-n) Cos(p-55)
90. ### Government

I know that the protesters often at military funerals protested however
91. ### Government

I need help on these two questions these are my answers. The U.S Congress is a bicameral branch of government in which each state A) Is represented based on population in the House of Representatives and is equally represented in the Senate B) Elects members of the Senate and ...
92. ### Math parallel lines and angles

1.Find the mesure of <s A. 63 B.153 C. 68 D.148 2. If a and b are parallel m<3=128 what is the measure of <8 A.134 B.52 C.54. D.49 3. Select the measures of complement or supplement of an angle. If there is no compliment or supplements select no complement or ...
93. ### math

The angle of an elevation of the top of a radio mart from a point 53meter from its base on ground level is 61degrees ,find the height of the mart to the nearest whole number.
94. ### English

Are these the answers to the test in the correct order or in the listed order?
95. ### Maths fractions

41/2 x ?=111/4 They're mix numbers.
96. ### English

Who is miss Lucas and Mrs Hurst in pride and prejudice?
97. ### Maths algebra

I wrote 47.235 as my answer then it asked me to use the calculator to find a complete answer.How I'm I suppose to do this. please I need help I got a test tomorrow. Thank-you.
98. ### Maths

I wrote 47.235 as my answer then it asked me to use the calculator to find a complete answer.How I'm I suppose to do this. please I need help I got a test tomorrow.Thankyou
99. ### Maths

A median of a number is 5. A mean is 5. They're five different numbers. They're not integers. Workout the numbers. Please help me I got a test tomorrow please!:)
100. ### Reading

Answer D it should always be intended to your audience
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