# EJ

Most popular questions and responses by EJ
1. ## chemistry

Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate

2. ## Science

An energy pyramid illustrates that energy in the form of ________ is lost to the surroundings as it is passed from one organism to the next? (The real question provides a list of possible answers but it's wayy too long to type but on that list there's

3. ## calculus

a right triangle is formed in the first quadrant by the x- and y- axes and a line through the point (1,2). write the length of the hypotenuse as a function of x. find the vertices of the triangle such that its area is a minimum.

4. ## physics

How much heat must be removed from 456 g of water at 25.0°C to change it into ice at -10.0°C? The specific heat of ice is 2090 J/kg ∙ K, the latent heat of fusion of water is 33.5 × 104 J/kg, and the specific heat of water is 4186 J/kg ∙ K.

5. ## Math

In Beloy's fish ball factory, it costs 25 pesos to make 15 pieces of fishball while it costs 40 pesos to make 27 pieces. Assuming that the total cost is described by a linear function, how much does it cost to make 19 pieces of fishball?

6. ## chemistry prt 2

What is the net ionic equation of the reaction of MgCl2 with NaOH

7. ## geometry

Two sides of an equilateral triangle are 3x +15 and x + 21. Which of the following could be the measure of the third side?

8. ## Chem

In acidic solution MnO4- oxidizes H3AsO3, a weak acid, to H3AsO4, a weak acid, and is reduced to Mn2+. Write the balanced net ionic equation for this reaction. How many H+ are there in the balanced equation? Question 8 answers

9. ## Math

A 90 N boy is hanging on a rope that extends between two poles. Find the tension of the 2 ropes. The angles were 5 and 10 degrees

10. ## math

an insurance company reported that 55% of all automobile damage claims were made by people under age 25. If six automobile damage claims were selected at random, determine the probility that exactly four of them were made by someone under ager 25.

11. ## chemistry prt 3

What is the net ionic equation of the reaction of MgSO4 with NaOH

12. ## Statistics

in a medical examination, 300 people undergo a height measurement and was found out that the average height of all are 150cm. if the standard deviation is 19, find the number of people that fall under the given conditions: a)with the height less than

13. ## geometry

What is the perimeter of the isosceles triangle shown below? If necessary, round to the nearest hundredth.

14. ## Economics

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 -

15. ## trigonometry

a yardstick, held vertically on a level surface, cast a shadow 1 foot 8 inch long. Find the tangent of the angles that the rays of the sun make with the horizontal.

16. ## physics

A sports car accelerates from rest to 100 km/h in 6.25. What is the acceleration in m/s^2?

17. ## Engineering

I am doing a science engineering project, and I have to write a proposal. Which person should I write it in? Is first person ok?

18. ## Pre - Algebra

(4x^2-2x-1)-(-3x^3+2) I already know the answer is 3x^3+4x^2-2x-3 but I need someone to explain how to get to the solution. It would be greatly appreciated.

19. ## physics

a sprinter accelerates from rest to 10 m/s in 1.3s. What is her acceleration a) in m/s^2> b) km/n^2?

20. ## ELA

Pablo is writing a research paper about Roald Dahl, a famous children's book author. His teacher told him to include at least one primary source in his research. Which of the following is an example of a primary source? A. an interview with Roald Dahl by a

21. ## Economics

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 -

22. ## chemistry

If you used 0.155 mL of acetic anhydride, and 0.169 g of p-aminophenol what was the limiting reagent? Choice is either: 1. acetic anhydride or 2. p-aminophenol ________mol? How many moles of the non-limiting reageant remained after the reaction was

23. ## chemistry

If you used 0.155 mL of acetic anhydride, and 0.165 g of p-aminophenol what was your theoretical yield of acetaminophen? ___________g If you recovered 0.173 g of acetaminophen, what was your percent yield? ________%

24. ## physics

When the mover pushes the box, two equal forces result. Explain why the box moves even though the forces are equal and opposite

25. ## science energy

A stone held above the ground has potential energy. When the stone is dropped, potential energy is converted to _________ energy. A. kinetic B. thermal C. chemical D. electrical

26. ## Math

Kyla has 20 more 10-cent coins as he does 5-cent coins. He has half as many 1-peso coins than 10-cent coins. If he has a total of 38 pesos how many 5-cent coins does he have?

27. ## calculus

find the differentiate y=cscx/ãx

28. ## physics

If you travel 10 m [E], 25 m [S], 12 m [W] and 25 m [N], your displacement is

29. ## Statistics

The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.

30. ## science

Darren the astronaut traveled to Planet U-427, a planet that is as big as Earth but is half the mass of Earth. What can you say about Darren's weight in this planet?

31. ## logic and design

You have been contracted by a local antique store to design an algorithm determining the total purchases and sales tax. According to the store owner, the user will need to see the subtotal, the sales tax amount, and the total purchase amount. A customer is

32. ## science

Darren the astronaut traveled to Planet U-427, a planet that is as big as Earth but is half the mass of Earth. What can you say about Darren's weight in this planet?

33. ## math

what is 9y to the 18 power divided by15y to the2 power

34. ## Applied Physics

The velocity of an object is +47 meters per second at 3.0 seconds and is +65 meters per second at 12.0 seconds. The average acceleration of the object is 2.0 m/s to the fourth power

35. ## Math

A right triangle has legs measuring 35.4 and 47.2 inches. What is the measurement of its hypotenuse?

36. ## Managerial Economics

Since dry cleaning produces air pollution, a small town with two dry cleaning companies has decided to regulate the dry cleaning industry. The two dry cleaning companies, Company A and Company B, currently produce 350 units of air pollution, which the town

37. ## algebra

sue nees to find the length & width of a room. the room is 4 meters longer then it is wide. its perimeter is 24 meters. what is the width?

38. ## Applied Physics

A 10 kilogram object subjected to a 20 Newton force moves across a horizontal frictionless surface in the direction of the force. Before the force was applied, the speed of the object was 2.0 meters/second. When the force is removed the object is traveling

39. ## math

ratio in simplest form 400 centimeters to 1 meter 1 400:1 cm/m

40. ## Analytic Geometry

Find the coordinates of the foci, the ends of major and minor axis, the ends of latus rectum then sketch the graph of y^2/169 + x^2/144 =1 (i need the anwers to that i will have an idea on how to solve the remaining !@#\$%^&.)

41. ## organic chemistry

is 2-pentene a cis or trans? and why? Cis- atleast 2 bulky grps.. Trans-3-4 bulky grps.. cis and trans must contain a double bond. i don't know if its a cis or trans so please enlighten me

42. ## Managerial Economics

Two competing hospitals in small city can choose whether to offer only basic health care, all- purpose care, or specialized care. The following payoff table denotes profits for each hospital: Hospital B's Services Hospital A's Services Basic All-Purpose

43. ## Managerial Economics

Problem 1 (50 points) The city of San Diego is considering extending the trolley (the downtown mass transit train) 11 miles from Old Town up to La Jolla. The cost of construction would be \$1.7 billion. The estimated ridership along the new section is 18

44. ## CHEMISTRY

how many grams of glucose, C6H12O6 and water are in 600g of 5.5% by mass glucose solution? please indicate the general formula to use to solve this problem.

45. ## Chemistry

Consider the following hypothetical nuclear breakdown: Fermium-258 (Fm-258) loses three alpha particles and two neutrons. What is the new element that is formed (in terms of chemical symbol, atomic number and atomic mass)? I'm not sure how to express this

46. ## CHEMISTRY

HOW MUCH 1 MOLE HCL IS REQUIRED TO MAKE 250ML OF 0.1 MOLE HCL

47. ## chs

If a pitcher threw a baseball straight up at 32 meters per second, what was the ball's velocity after 2.5 seconds?

48. ## trig

csc^2x secx/sec^2x+csc^2x

49. ## Applied Physics

A car is traveling at 20 meters per second. The driver steps on the brake. The car is in equilibrium

50. ## Applied Physics

An object is dropped from a height of 49 meters. The object takes 3.2s to hit the ground. The final velocity of the object when it hits the ground is -31 m/s

51. ## Math

1. In this problem, we analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open market.

52. ## Algebra

Explain the process after Thx 2(2-2x)=-3x

53. ## Math

Mary scored 89 on her first test and 92 on her second test, 98 on the third, and 95 on the fourth. She has one more test to take. If she wants to have an average of 100 on all five sets, what score should she get on her removal test?

54. ## math

Wha is a vertex, a focus, an eccentricity, and a latus rectum

55. ## Economics

A city must decide whether to build a downtown parking garage and what rate to charge. It is considering two rates: a flat \$1.50-per-hour rate or an all-day rate averaging \$1 per hour (based on a \$10 daily rate and an average 10-hour stay). Parking demand

56. ## Quantitative Methods

7) President’s job approval rating is frequently reported in news programs. You will hear statements such as: “Among likely voters, the President’s job approval rating is 46% with a margin of error of 6%.” a) What percent confidence interval do you

57. ## chemistry

Which of the isotopes of hydrogen is radioactive

58. ## math

How much interest would a person have to pay on a \$3250 loan at 5% for three years??

59. ## physics

At highway speed, a particular car is capable of an acceleration of about 1.7m/s^2.At this rate how long does it take to accelerate from 90 km/h to 110 km/h? (in seconds)

60. ## english

in this sentence is on a verb (new sleds raced on the hill.)

1. ## Chemistry

WRONG. You don't even know how to compute for the number of moles of KMnO4 solution. It's not: (.02mol)/(.023L) It's: (.02mol)/(1L) X (.023L) The Molarity of KMnO4 is 0.02M, hence it's (0.02mol KMnO4/1Liter) then you multiply the given volume to get the

posted on August 19, 2018
2. ## Pre - Algebra

Thank you!

posted on June 5, 2018
3. ## L.A

Roasted toaster is actually correct lol

posted on May 20, 2018
4. ## History

primavera

posted on March 29, 2018
5. ## science energy

i think kenetic

posted on January 31, 2018
6. ## math

47

posted on December 3, 2017
7. ## Math

THANK YOU REINY :))

posted on October 13, 2017

Stlemoiet

posted on December 22, 2016
9. ## Geometry

hmm

posted on October 5, 2016
10. ## math

Its on the ellipse. Google isn't helping.

posted on April 20, 2016
11. ## College Algebra

40 peanuts and 60 walnuts

posted on September 15, 2015