# Elise

Popular questions and responses by Elise

The temperature in Toronto at noon during a winter day measured 4°C. The temperature started dropping 2° every hour. Which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°C? Can you please check

2. ## Physics

The anode (positive terminal) of an X-ray tube is at a potential of +125000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? (b) If

3. ## Statistics

A study of generator related carbon monoxide deaths showed that a sample of 6 recent years had a variance of 16.8 deaths per year. Find the 99% confidence interval of the true variance

4. ## Statistics

Among first year students at a certain university, scores on the Verbal SAT follow the normal curve; the average is around 550 and the SD is about 100. a) what percentage of these students have scores in the range 400 to 700? b) There were about 1000

5. ## physics

A box having a mass of 50kg is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be

6. ## science

were doing simple machines and on my paper it shows a door knob What simple machine is that ( lever,wedge etc.) And my sec que it also shows scissors what simple machine is that?

7. ## Biology

Brown eyes in humans are dominant to blue eyes. A brown-eyed man, whose mother was blue-eyed, marries a brown-eyed woman whose father had blue eyes. What is the probability that this couple will have a blue-eyed child?

9. ## Maths

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second. I

10. ## algebra

Johnny has \$147 dollars in ten, five and one dollar bills. He has 38 bills. He has twice as many fives as tens. He has three more ones than fives. How many of each bill does he have?

11. ## physics

What force must be exerted to prevent a truck weighing 15 tons from rolling down an inclined plane which makes an angle of 3 degrees with the horizontal.

12. ## physics

A ball is thrown with a speed of 20 m/sec at an angle of 60 degrees below the horizontal from a bridge whisch is 30 m above the water. Where does the ball hit the water? How long is it in the air?

13. ## algebra

The square that I am supposed to complete is x^2+15x, and the answer is (x+15/2)^2. How does this answer account for the 15 separate from the 15^2? I am confuzzled. Same thing goes for x^2-7x the answer is (x-7/2)^2, but I don't see what happened to the

14. ## Science

What is part of the mantle that can bend like plastic?

How do you generate the average variable function (AVC) given the estimated marginal cost function (SMC)?

16. ## Chemistry

At 25 degrees Celsius Ksp for CaSO4 is 2.5 x 10^-5 suppose 100mL of 0.5M Na2SO4 is mixed with 100mL of 1.65 M Ca(NO3)2 find the initial concentrations of Ca^2+ and SO4^2-

17. ## math

Find the sum of the infinite geometric series below, or indicate that the sum does not exist. 15+6+12/5+24/25+...

18. ## math

A ferry boat departed from port and traveled at a rate of ten miles per hour at an angle of 30 degrees north of east across a large river. If the current is flowing at a rate of 4 miles per hour straight south, what is the speed and direction of the boat

19. ## Math

If tan(-a)=-5, find cot a

20. ## Calculus

Find the magnitude and direction angle of p=42i+35j

21. ## Math

A cart full of packages weighing 180 pounds is rolling down a ramp 12 feet long at an incline of 25° (the force applied by gravity is equal to the weight of the package). Find the work done by gravity as the cart moves the length of the ramp. Assume that

22. ## Math

Wei-Men make a square quilt that has an area of 100 square feet. It has twenty five square blocks each the same size. What is the length of each side of a block?

23. ## amth

Solve the multiple-angle equation. cos x/2 = - squareroot 3/2

24. ## maths

Use the cofunction identities to evaluate the expression below sin^2 21° + sin^2 61° + sin^2 69° + sin^2 29°

25. ## maths

Find all solutions of the given equation in the interval Í0, 2π) cos x/2 − s i n x = 0

26. ## maths

Use the product-to-sum formula to write the given product as a sum or difference. 6sin π/10 cos π/ 10

27. ## stoichiometry

When aluminum is mixed with iron(III) oxide, iron metal and aluminum oxide are produced along with a large quantity of heat. Fe2O3(s) + 2 Al(s) 2 Fe(s) + Al2O3(s) + heat What mole ratio would you use to determine moles Fe if moles Fe2O3 is known?

The temperature in Toronto at noon during a winter day measured 4°C. The temperature started dropping 2° every hour. Which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°C?

29. ## Physical Science

A hot iron ball is dropped into 200.0 g of cooler water. The water temperature increases by +2.0°C and the temperature of the ball decreases by -18.6°C. What is the mass of the iron ball?

REED: THANKS

31. ## JUSTIFYING UNETHICAL BEHAVIOUR

SUE: SORRY IF I DID NOT EXPLAIN CLEARLY BUT HELP WAS GIVEN OTHERWISE.

32. ## JUSTIFYING UNETHICAL BEHAVIOUR

A belief that an actiity is within resonable ethical and moral limits. a belief that an actiity is in the inividual or the companys best interest,is sfe because it will not be found pout or be publisized. A belief that an actiity helpsn the company, it

33. ## chemistry

what volume of a 0.247 M perchloric acid solution is required to neutralize 23.8 mL of a 0.156 M calcium hydroxide solution? _titration problem of acids/bases

34. ## math

Serena paid \$20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost \$0.50 more than each ruler, how much did each folder cost?

35. ## ENGLISH

IDENTIFY THE DEGREE OF COMPARISON USED IN THE FOLLOWING SENTENCE.THE AIR IS MORE HUMID SINCE THE THUNDERSTORM PASSED THROUGH TOWN

36. ## history

in 1893, the cleveland administration;s repeal of the sherman silver purchase act

37. ## Coolio

If a baseball player has 18 hits in 50 at bat,what is the probability that he will get a hit in his next at bat? Express your answer as a decimal number in the thousandths place.

38. ## math

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.37 cross 10−5 ( to the 5th power) watts/cm2 ( cm squared)

39. ## Biology

Im stumped... These answers I cannot find, please and thank you :) 1) In males, the primary target of FSH is the ______. 2)Testosterone and other androgens are secreted by the______. 3)During meiosis, when synapsis occurs, corresponding maternal and

40. ## Math

A study of generator related carbon monoxide deaths showed that a sample of 6 recent years had a variance of 16.8 deaths per year. Find the 99% confidence interval of the true variance

41. ## Math

What expression is equivalent to 16+ 56

42. ## Maths

How do you figure out the diameter of the base of a truncated cone with the measurement of the leaning side and the diameter of the top circle face?

43. ## Math

If Anna leaves her house at 11:00am and walks to her friends house located 1.34 miles away at 5 miles an hour walking speed, approximately what time will she get there?‎

44. ## pre calculus

How do you solve c + 70 + 12c = 196 - 5c

45. ## Spanish III Portfolio

Hello, I am completing a written assignment for my final portfolio and I just wanted to make sure this is grammatically correct and makes sense. Prompt: Think of where you live in relation to the nearest airport. Write down directions on how to arrive at

46. ## English 11

when writing a summary of an article what are other ways to let others know that you are talking about the article besides saying the article says this______ or the article is this______?

47. ## Math

A manufacturer of an anti-inflammatory drug claims that the drug will be effective for 6 hours. An independent testing service determined that the drug was effective for only 80% of the length of time claimed by the manufacturer. Find the length of time

48. ## Math

I have a challenge of drawing as many rectangles as I can but using only 8 squares on a grid that's only 4 across and 4 up. I can only draw two....

49. ## Math

I have a challenge of drawing as many rectangles as I can but using only 8 squares on a grid that's only 4 across and 4 up. I can only draw two....

50. ## calculus

A hunter at a distance dx from a coconut tree points the nuzzle of his gun directly at a monkey sitting on the tree at a height dy. The monkey sees the hunters and drops vertically from the tree at the very instant of firing. Will it be hit by the bullet?

51. ## physics

What does it mean when they say that action equals reaction?

52. ## physics

a cannon fire a bullet into a castle. leave the gun with velocity of 110 with an angle of 20. the bullet reaches highest point at P when it is 1 m above the castle. What is the height of the top of the castle? and waht is the horizontal distamce between

53. ## calculus

identify the type of curve and sketch the graph of y2-2x+6y+5=0

54. ## Math

Shawna thinks that 8 x 2 = 17. What number pattern shows that she is not correct?

55. ## physics

A car is moving along with a velocity of 88ft/sec and has a weight of 2000lbs. The engine suddenly stops. If the coefficient of frictgion between the car and road is .2.(a) Find the acceleration. (b) How long will it take to come to rest? (c) How far will

56. ## physics

An object has a mass of 2kg and rests on a surface where the coefficient of friction is .2. (a) Find the acceleration of 10 m/sec squared (b) Assume Vi=0, how long does it take to travel 100m? (c) What is the velocity at this time?

57. ## math

how many pieces of ribbon each 4.5 cm long can be cut from alength of 4 and a half metres?

58. ## physics

The rafters of a roof meet at an angle of 120 degrees. What force is exerted along the rafters by an object weighing 6000nt suspended from the peak?

59. ## Physics

Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?

60. ## physics

what is the coefficient of sliding friction between a 3.2kg sled and snow when the sled, carrying a 25kg boy, can be pulled with a force of 35nt?

61. ## physics

What is the force required to move a 22kg ccrate up an incline of 35 degrees, if the coefficient between the two surfaces is .30?

62. ## physics

A boy exerts a horizontal force of 2nt to pull his 2kg sled over the snow. If he gives someone a ride on his sled and he has to exert a 12nt force to pull the sled, how much does that person weigh and what is their mass?

63. ## physics

(a)If a crate slides down a 10 degree incline at uniform speed, what is the coefficient of friction between the crate and the incline?(b)What is the coeffiecient of friction using a 20 degree incline?(c)What is the coefficient of friction using an n degree

64. ## Human Physiology

How do low plasma protein levels produce edema?

65. ## Human Physiology

What would be the effect of low blood protein levels on the colloidal pressure?

66. ## Physics

The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?

67. ## Physics

A car goes through a curve with a constant velocity of 60mph and experiances a centripital acceleration of 77.4 ft/secsquared. Find the radius of the curve.

68. ## Physics

The frequency of an electon orbiting a nyclear is 1000000000 cps and the radius is 5 * 10 to the -12m. Find the velocity of the electron.

69. ## physics

a satellite orbits the earth at an altitude of 5000 m above the surface of the earth. Assuming that acceleration due to gravity is still 9.8 m/s/s, find the time for 1 revolution.

70. ## Physics

If radius = 1.25 when i am swinging a bucket around and around what is the slowest possible speed i can go without it spilling?

71. ## physics

the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.

72. ## physics

a body is projected at an angle with the horizontal with an initial of 500 m/s. 4 seconds later it hits the ground. find theta and the horizontal range.

73. ## physics

If a bomber travels horizontally at a speed of 250 km/hr and at a height of 5000 m how far away (measured horizontally) from the target must a bomb be released?

74. ## chemistry

1 liter of a 1 M lithium hydroxide solution is added to 1 liter of a 1 M barium chloride solution, and a precipitate forms. What ions are left in solution after the reaction is complete? What ions are left in solution after the reaction is complete?

75. ## physics

two tall buildings are 80 m apart. A ball is thrown at 100 m/sec from one building toward the other but at an angle of 37 degrees below the horizontal. Find the vertical distance through which the ball falls before it hits the other building.

76. ## algebra

Kayla wants to buy snack that weigh 1 kilogram How much she'll have to pay if she buy food in bulk. t=total price p=price per kilogram

77. ## Algebra

what is the equivalent expression of g+x

78. ## geography

what makes a town a town a village a village and a city a city

79. ## Science

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct?

80. ## science

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct?

81. ## science

Is milk a homogenous mixture? Thanks-Elise

82. ## Algebra

How do you factor c^2+3c-1? Thanks for your help -Elise

83. ## French

Can anyone find a French dictionary online with spoken pronounciations, where you click, and a voice pronounces the word? Thanks ~Elise

84. ## Math

How do you do long division with polynomials? EX: x-2 divided by x^3 + x^2 +4x ???

85. ## Algebra

Below is a "complete the square problem" from a math help site on the internet. This is the original problem. 4x2 – 2x – 5 = 0 Move the loose number over to the other side. 4x2 – 2x = 5 Divide through by whatever is multiplied on the squared term.

86. ## Algebra

How does 3x(4x+5)-5(4x+5) factor out to be (4x+5)(3x-5) ? This may be wrong, because I wrote this answer in my notes, but could some one please explain this to me? Also, do you have any tips on factoring? I understand the concept when I see an

87. ## biology

My teacher asked quite a few questions, but these are the ones with which I am having trouble...I have re-worded them somewhat for clarity. Can anyone please help me! Thank you! _____________________________________ Methotrexate is a cancer drug that

88. ## American History

How did the Navigation Acts help colonial development?

89. ## english-creative writing

I really want a list of strong words; nouns, adjectives, and verbs. For my creative writing class I really want strong, concrete words to place emphasis on the right spots in my writing. Thanks. P.S.I'm in high school so please keep that in mind when

90. ## science

what spacifc web site can we look on to do the theory orf evolution on darwin??? (:

1. ## Math (Unit 7) 6th grade

I figures out the mean but i couldnt figure out the distancie and the M.A.D

posted on October 8, 2019
2. ## PE/Health

i did the same thing boo! :/

posted on June 6, 2019
3. ## English

thanks Duck

posted on June 5, 2019
4. ## Social Studies

Thank you Anon

posted on June 4, 2019

what is 52 rounded to the nearest hundred

posted on January 28, 2019
6. ## Accounting

Currently, the unit selling price is \$50, the variable cost, \$34, and the total fixed costs, \$106,000. A proposal is being evaluated to increase the selling price to \$54.

posted on November 9, 2018
7. ## statistics

.249 .0303

posted on May 10, 2018
8. ## Biology

Sexually, and asexually

posted on January 10, 2018
9. ## math

10/7

posted on March 6, 2017
10. ## Math

Thank you. I wasn't sure how to put the information given into equations.

posted on January 17, 2017