Questions Asked on
December 9, 2017

  1. Calculus

    The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2, v(0) = −3, 0 ≤ t ≤ 5 (a) Find the velocity at time t. v(t) = ______ m/s (b) Find the distance traveled during the given

  2. Physics

    A 67.5 kg sprinter exerts a force of 775 N on the starting block which makes a 20 degree angle to the ground. a) What was the horizontal acceleration of the sprinter? b) If the force was exerted for 0.340s, with what speed did the sprinter leave the

  3. Calculus

    The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2, v(0) = −3, 0 ≤ t ≤ 5 (a) Find the velocity at time t. v(t) = t^2+2t-3 m/s (b) Find the distance traveled during the given

  4. science

    Question: Why are "apparently" small changes in pH so important in Biology? Answer: pH levels are each a 10-fold change so a change by 2 is actually a change by 1000. pH determines certain characteristics in organisms that allow them to live in certain

  5. Physics

    A 58.7-kg lead ball is dropped from the Leaning Tower of Pisa. The tower is 55.0 m high. A) How far does the ball fall in the first 3.08 seconds of flight? = 46.5 m B) What is the speed of the ball after it has traveled 2.10 m downward? = 6.42 m/s C) What

  6. finance

    Suppose you obtain a $3,000 T-note with a 3% annual rate, paid quarterly, with maturity in 5 years. How much interest will you earn?

  7. Geometry (check answer)

    Prove that the triangles with the given vertices are congruent. A(3, 1), B(4, 5), C(2, 3) D(-1, -3), E(-5, -4), F(-3, -2) a The triangle are congruent because triangle ABC can be mapped to triangle DEF by a rotation. (x,y)--->(y, -x) Followed by a

  8. Math

    30 coins consisting of nickels and dimes are worth $2.40. How many of each kind are there?

  9. Math

    Solve the equation. Explain each step and identify the property used to reach each step 0.6x+0.8=1.4 Please help me with this question.

  10. Pre-algebra

    Use a proportion to solve the problem. 34% of 83 x/100=34/83;40.96 x/100=34/83;2.822 x/83=34/100;28.22 x/83=34/100;56.44 I think it's either c or d because a and b arn't set up correctly according to how you're supposed to set up a porportion.

  11. math

    Find x so that QS || PT PQ = 8, QR = 5, RS = 15, ST = x + 3

  12. linear algebra

    Suppose that the sequence x0, x1, x2... is defined by x0 = 1, x1 = 4, and xk+2 = −6xk+1−8xk for k≥0. Find a general formula for xk. Be sure to include parentheses where necessary, e.g. to distinguish 1/(2k) from 1/2k. . No idea how to go about this,

  13. math help g

    Chris has a square garden with an area of 38.4m^2. He decreases the length of each side by 1.7m to make a smaller garden. What is the closet to the perimeter of the smaller garden?

  14. Riddle

    Who makes it has no need for it. Who buys it has no use for it.who usesitcan neither see it or feel it. What is it?

  15. English

    What tone does Henry Gilbert create in lines 8-11 of the excerpt of King Arthur’s Knights? horror and alarm excitement and anticipation peace and joy resignation and defeat C? Text Then, when the queen came unto King Arthur, there was great feasting and

  16. Sociology

    Please check my answers. 1. Population growth is an issue because A. sociologists cannot track all the social groups that arise. B. infrastructure within cities is insufficient. C. it goes hand in hand with lowered life expectancy. D. natural resources are

  17. Criminal justice

    As interpreted by the US Supreme Court which of the following individual rights is not guaranteed by the bill of rights? A right to have an attorney A right to an appeal A right to a trial by jury*** A right to due process I believe it is a right to a

  18. Biology question pH

    pH levels are each a 10-fold change so a change by 2 is actually a change by 1000. pH determines certain characteristics in organisms that allow them to live in certain areas so an alteration in pH changes their adaption skills. why is a change by 2 =

  19. math

    Find the perimeter of the given triangle. Round your answer to the nearest tenth if necessary. ∆ADF, if ∆ADF ∼ ∆BCE, given BC = 17, BE = 9, CE = 12, and DF = 15. ∆BCE is inside of ∆ADF

  20. statistics

    The distribution of grades of 50 students in a certain subject is normally distributed with a mean of 86 and a standard deviation of 12. 6. 7. If the passing grade is 75, how many failed in the subject?

  21. Physics

    An electron is accelerated from rest through a potential difference of 1.40*10^5 V. What is its speed? So there were also two parts before to this question: the relativistic kinetic energy in eV (which I correctly found to be just 1.40*10^5 eV) and its

  22. stats

    A certain disease has an incidence rate of 0.7%. If the false negative rate is 7% and the false positive rate is 1%, compute the probability that a person who tests positive actually has the disease.

  23. English Help Re-wording

    Help with re-wording my sentences Please: After September 11th the issue of racial profiling has expanded to more directly affect South Asian Americans, Arab Americans, Muslim Americans, and those identified as foreigners or immigrants. These communities

  24. Stats

    The Corporate Lawyer, a magazine for corporate lawyers, would like to report the mean amount earned by lawyers in their area of specialization. How large a sample is required if the 99 percent level of confidence is used and the estimate is to be within

  25. Pre-Algebra

    Find the regular price. Round the nearest cent. Sale Price:$56.78 Percent Discount: 40% $141.95 $96.78. $79.49 $94.63

  26. Riddle

    You are dead. In a room with two doors. One leads to heaven. One leads to Hell. Infront of each door stands a man. One man tells only the truth. The other only tells lies. You have one question to ask one of the men. What would that question be and to

  27. Math

    A bathtub is filled with 100 gallons of water. A cup of milk is then poured in and mixed thoroughly with the 100 gallons of water. A cup of liquid is then taken out and placed in a bowl. What fraction of the liquid in the bowl is milk? What is the ratio of

  28. accounting

    Martin is married, but did not live with or have contact with his spouse in 2017. He does not know where she is. He indicated on the intake sheet that he is not legally separated. • Martin does not have children or any other dependents. • Martin worked

  29. accounting

    10. Head of Household is the most advantageous allowable filing status Samantha can use. a. True b. False 11. How many qualifying persons does Samantha have for the earned income credit? a. 0 b. 1 c. 2 d. 3 12. What is the credit for child and dependent

  30. criminology

    I am writing an argument of why there shouldn't be greater punishment for hate crimes vs. not done out of "hate." and am trying to find some stats and sources to back it up. I tried searching the recidivism rate of hate crimes vs. non hate crimes but can't

  31. Math (Please help!)

    Are the ratios Start Fraction 25 over 45 End Fraction and Start Fraction 15 over 27 End Fraction proportional?

  32. Physics

    A submarine of mass 2.55 × 106 kg and initially at rest fires a torpedo of mass 254 kg. The torpedo has an initial speed of 100 m/s. What is the initial recoil speed of the submarine? Neglect the drag force of the water.

  33. Feedback Control

    The goal of this project is to model the longitudinal motion of a Segway and design a PID controller for it. The model must include the dynamics of the inverted pendulum on two wheels, as shown on Figure 1 (left), and the model of the DC motors (same as )

  34. computer

    // This program counts how many sales are made // in each of five categories of products start Declarations num category num SIZE = 5 num QUIT = 9 num sales[SIZE] = 0, 0, 0, 0, 0 string HEAD1 = "Sales" string HEAD2 = "Category Number of Sales" output

  35. Georgia State

    It’s good to eat less than 100 grams of carbs per day because it rejuvenates your body. And we know it rejuvenates your body because people who eat fewer carbs live longer than those who don’t. And 100 grams of carbs per day is relatively few carbs.

  36. geography

    Which continents includes the South Pole? Just Antarctica right?

  37. geography

    What do you have to cross to fo from Zimbabwe to Zambia? Victoria Falls Bridge? What direction do the beaches of Bombay face? No idea?

  38. History

    The most common argument of pro-slavery radical "fire eaters" was A. That the US should declare war on Britain for allowing runaway slaves haven in Canada B. Those slaves are property and thus the "peculiar institution" is protected by the Constitution C.

  39. Chemistry

    Will a precipitate of CaSO4 form if 40.0mL of 2.0 x 10^3M CaCl2 is mixed with 60.0mL of 3.0 x 10^-2 Na2SO4?

  40. Chemistry

    Will a precipitate form when 20.0mL of 1.8 x 10^-3M Pb(NO32 is added to 30.0mL of 5.0 x 10^-4M Na2SO4? The Ksp of (PbSO4) is 6.3 x 10^-7.

  41. Chemistry

    Caluculate the molar solubility of PbCl2 in 0.0040 M KI solution. The Ksp of PbI2 - 7.2 x 10^-9. The answer should be 3.29 x 10^-4. This is my work so far PbI2Pb^+2 + I- PbKI2----->Pb^+2 + KI^-1 7.2 x 10^-9=(s)(s+0.0040M) Assume s

  42. Math

    If it took you 16.30 seconds to run 100m, how long would it take for you to run 60m?

  43. Physics

    A block is in the shape of a cube with side 10 cm. What is the density of the block?

  44. h

    Which o

  45. maths

    find all possible pairs of two natural no whose sum is 77 and their gcd is 7

  46. English

    Identify the sentence with a verb usage error. (A) Everyone on the baseball team has drank all of the water bottles by the end of the game. (B)That is the silliest thing I have ever seen. (C)Their school choir had sung with gusto for each competition.

  47. Bio

    What trysin

  48. Algebra

    Invest $2800 @ 4.7% a year (compound). How long it will take to double the amount invested to the nearest tenth of the year?

  49. Math transformations

    A parallelogram has vertices at A(-2,-1), B(-2,1), C(1,2),and D(1,0). If it is translated 1 unit right and 1 unit up, what are the vertices of the image?

  50. Business

    What job enrichment practices does Nestle follow regarding: task identity task significance autonomy

  51. math

    Determine whether QS || PT . Justify your answer. PQ = 18, QR = 6, RS = 12, ST = 36