# Questions Asked onDecember 4, 2016

1. ## Linear Algebra

For the matrix A below, find a value of k so that A has two basic eigenvectors associated with the eigenvalue λ = 3. A = [−3 −18 54 204 0 3 −18 −54 0 0 −3 k 0 0 0 3] k = ? I'm specifically having troubles reducing this and knowing what it'll

2. ## PreCalc

The initial size of a culture of bacteria is 1500. After 1 hour the bacteria count is 12000. (a) Find a function n(t) = n0e^rt that models the population after t hours. (Round your r value to five decimal places.) n(t) = (b) Find the population after 1.5

3. ## MATH

a man bought a piece of land for rs 15000.he sold 1/3 of the land at loss 5% and what gain % should he sell the remaining to gain 8% on the whole.

4. ## Math

If he arranges the chairs and six years of the same morning he has all the chairs left over if he arranges the chairs and four rows of the same link he has 19 years left over how many chairs does Liam have

5. ## Calculus

A man 1.69 meters tall is walking towards a building at the rate of 1.5 meters per second. If there is a light on the ground 15 meter from the building, how fast is the man's shadow on the building growing shorter when he is 5 meters from the building.

6. ## chemistry

A major component of gasoline is octane (C8H18). When octane is burned in air it chemically reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of oxygen gas is consumed by the reaction of 8.17g of octane?.

7. ## physics

A force is applied to a 3 kg mass and produces 5 m/s 2 acceleration. What acceleration would be produced by the same force applied to a 12.2 kg mass? Answer in units of m/s 2 .

8. ## Maths

The taxi fare in a city is such that rs.50 is the fixed amount for the first two kilometers and rs.10 for the subsequent kilometers is charged.Taking the distance covered as " x"km and total fare as rs ." Y" ,write a linear equation in "x" and "y"

9. ## PreCalc

An earthquake measuring 6.4 on the Richter scale struck Japan in July 2007, causing extensive damage. Earlier that year, a minor earthquake measuring 3.1 on the Richter scale was felt in parts of Pennsylvania. How many times more intense was the Japanese

10. ## Maths

Find the quotient of 4 5 and 6 7 . Give your answer as a fraction in its simplest form.

11. ## Calculus

A car travelling at 50 kilometers per hour crosses a bridge over a river 10 minutes before a boat travelling at 40 kilometers per hour passes under the bridge. The river and the bridge are straight and at right angles to each other. At what rate are the

12. ## Physics

In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 5.0 m away. After a running start, he leaps at an angle of 10◦ with respect to the flat roof while traveling at a speed of 5.6 m/s. The

13. ## Calculus

A man on a wharf is pulling in a boat by means of a rope attached to the bow of the boat 1 meter above water level and passing through a simple pulley located on the dock 8 meters above water level. If he pulls in the rope at the rate of 2 meters per

14. ## Maths

divide 1000 among a,b,c in such a way that a gets 120 more than b and b gets rs 110 more than c .hw much each get

15. ## SS

"We seek no conquest. All we ask it to be left alone According to this quote which statement best summarizes the souths agenda A.to continue their way of life unchanged b to accept changes to the plantation system c. to change the souths borders d. to

16. ## Math

Using his driver on the 7th tee, Chris hits an excellent shot, right down the middle of the fairway. The ball follows the parabolic path shown in the figure, described by the quadratic function: h(x)=0.5x-0.002x^2. This relates the height, h, of the ball

30. ## MATHS

A company is a monopolist. The demand function for its product is as follows: Q = 60 – 0.4P + 6Y + 2A Where Q = quantity sold in units P = Price per unit Y = per capita disposal income (thousands of dollars) A = hundreds of dollars of advertising

31. ## calculus

if f(x) = (x-2)^(1/3) use Tylor's polynomial of degree two about c=3 to estimate the value of (1.36)^(1/3) thanks

32. ## Chemistry

Magnesium metal reacts with HCl(aq) according to the equation: Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) In an experiment to determine the ΔH for this reaction, 0.158 g of Mg metal is combined with an excess of HCl to make 100.0 mL of solution in a coffee

33. ## math

A factory kept increasing it's output by the same percentage every year .find the percentage if it is known that the output is doubled in the last two years.

34. ## Physics

A car of weight 1.4*10^4N is moving up an incline at a constant speed of 6.2 m/s . The incline makes an angle of 5.0 to the horizontal. A frictional force of 600 N acts on the car in opposite direction. State the net force of the car

35. ## Maths

The length and breadth of a rectangular hall are 24m and 18m.what is the largest straight line that can be drawn in the floor of the hall.

36. ## physics

In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 4.4 m away. After a unning start, he leaps at an angle of 17◦ with respect to the flat roof while traveling at a speed of 4.3 m/s. The

37. ## Math

A man weight 72 kg his wife rate is 25% less than his if there's somewhere 10% more than his mother find the son weight

asked by ICSE mathematics for class 6
38. ## Math

A college class with 30 sophomores, 18 juniors, and 12 seniors is divided into project groups where each group has the same number of sophomores, juniors, and seniors. What is the greatest number of groups that can be formed? How many sophomores, juniors,

39. ## Pre-calculus

Convert cartesian equation to polar form 1. x^2+y^2=4x 2. (x^2+y^2)^2=6(x^2-y^2)

40. ## Math

Using his driver on the 7th tee, Chris hits an excellent shot, right down the middle of the fairway. The ball follows the parabolic path shown in the figure, described by the quadratic function: h(x)=0.5x-0.002x^2. This relates the height, h, of the ball

41. ## Artificial Intelligence

Consider a very simpliﬁed model of AES in which there will be only one P box and one S box and an 8 bit key. Use 0xAE as the key. Show, step by step, how one encrypts the string T h e (without any embedded blanks) assuming that each letter is from ISO,

42. ## Math

A basket of flowers weighing 2kg is placed on a flat grassy slope. The coefficient of static friction between the basket and the slope is 0.4, and the basket is on the point of slipping down the slope. Draw a force diagram to indicate forces (including

43. ## maths

Adding 4 to twice a number yields 25/6.Find the number

44. ## Calculus

A ladder 15 meters long leans against a vertical wall. If the foot of the ladder is being pulled away from the wall at the rate of 2 meters per minute. How fast is the top of the ladder sliding down the wall at the instant when the foot of the ladder is 12

45. ## Calculus

A stone is dropped into a still pond sends out a circular ripple whose radius increases at a constant rate of 2 meters per second. How rapidly is the area enclosed by the ripple increasing at the end of 20 seconds?

46. ## Physics!!!!!!

In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 5.0 m away. After a running start, he leaps at an angle of 10◦ with respect to the flat roof while traveling at a speed of 5.6 m/s. The

Eli Orchid has designed a new pharmaceutical product, Orchid Relief, which improves the night sleep. Before initiating mass production of the product, Eli Orchid has been market-testing Orchid Relief in Orange County over the past 9 weeks. Now that the

48. ## ACCOUNTING

On April 1, 10,000 shares of $5 par common stock were issued at$22, and on April 7, 5,000 shares of $50 par preferred stock were issued at$104. On April 20, 5,000 shares of common stock were issued in exchange for land. The stock had a market value of

49. ## Math

The diagonal of a square is 3 feet long. Find its perimeter. My answer: a^2+b^2=c^2 x^2+x^2=3^3 2x^2=9 divide both side by 2 x^2=4.5 x=√4.5 x=2.1 feet Is this right?

50. ## Physics

A 200kg wagon is pushed along a horizontal surface at a constant 10m/s when it is released. After rolling a distance of 45m the wagon comes to a complete stop. Find the coefficient of friction.

51. ## Hyperbolas, comic sections

So I have this equation: 36x^2-121y^2=49 Which I rearranged to 36x^2/49-121y^2/49=1 So I want to go from here and find the eccentricity,foci,asymptotes etc... But I'm getting myself confused. Since my equation is of the form x^2/a^2-y^2/b^2=1 Both a and b

52. ## English

What is one possible theme of I Know Why The Caged Bird Sings? Marguerite did well when her mother sent her to live with her grandmother. There is no sense dreaming about the future when you are unhappy. The author grew up to become a success in several

53. ## math help

What is the smallest number i must multiply 315 in order to make it a perfect cube? Please tell me the method you sed and how you got the answer. I've been doing guess and check and it is time consuming.

54. ## math

The Following Table gives the sales for the Sasquatch Men's Shoe store: Shoe Size , Frequency (number of pairs sold) 4 , 8 5 , 12 6 , 31 7 , 50 8 , 58 9 , 46 10 , 37 11 , 14 12 , 11 1)determine the mean for the distribution, correct to 2 decimal places. 2)

55. ## science

what city goes below sea level first miami or new orleans?

106. ## math

r is no less than 1 unit from 24

107. ## Math

a number n is divided by 4 and the result is divieded by 3 . The final result is 2. What was the original number?

108. ## math

Theresa has a chose of which pack of pencils to buy. At the store 20 pencils cost $4.00, or 12 pencils for$2,70. A) which is the better buy based on its cost per pencil? B) what is the difference of the cost per pencil between each pack?

109. ## algebra

The diagonal and the longer side of a rectangular plot are together three times the length of the shorter side. If the longer side exceeds the shorter side by 140 ​feet, what is the area of the​ plot?

110. ## Algebra

Identify the type of conic section that has the equation 9x^2 + 25y^2 =225 and identify its domain and range.

111. ## MATH

Let F(x) = ∫0 to x e^(t^2)dt a) Compute limx → ∞ (xF(x))/ (e^(x^2)) b) Compute limx → 0 F(x)/(xe^(x^2))

112. ## Algebra

The sum of two numbers equal 25. The second number is 4 times larger than the first number. What are the two numbers

113. ## Physics

A 52.4 kg pole vaulter running at 10.8 m/s vaults over the bar. The acceleration of gravity is 9.81 m/s2 . If the vaulter’s horizontal component of ve- locity over the bar is 0.60 m/s and air resis- tance is disregarded, how high is the jump? Answer in

My question is: Between which two whole integers is -0.5. how do I explain this

115. ## comparing fractions

A third grade class was given a multiplication quiz. The quiz had 10 problems. Any correctly answered 6 problems, Bobby answered 7 problems correctly, Tom answered 9 problems correctly, and Sue only answered 2 problems correctly. A. What fraction of the

116. ## Math

Amman hikes 2 3/4 miles of nature trail in 1 hour and 15 minutes. How many miles of trail does Amman hike per hour?

117. ## science

what makes us cry while chopping the onion?

118. ## Math

Input 48,24,12,6 Output24,12,6,3 Rule?

119. ## Physics

A ball having a weight of 1.5 N is dropped from a height of 4 meters. (Neglect air friction.) How much mechanical energy is "lost" just before it hits the ground?

146. ## English

What is the purpose of the author using flashbacks in the short story 'penny in the dust'?