# karla

Popular questions and responses by karla
1. ## chemistry

In a 1.0x10^-4 M solution of HClO(aq), identify the relative molar amounts of these species:HClO, OH-, H3O+, OCl-, H2O

2. ## algebra 2

f(x)={2x,x1} Given the piecewise functions shown below, select all of the statements that are true. A.f(5)=1 B.f(2)=4 C.f(-2)=4 D.f(1)=5

3. ## Algebra

in what form is the following linear equation written? 3x-2y=4 A.rise-run B.standard C.slope-intercept D.point-slope

4. ## English

In Marigolds how does the author use of tone help describe Elizabeth's perception of her childhood? -her tone sounds solemn at first showing that she was reflecting over her sad or hard childhood. Then it switches to matter of fact because she realizes she

5. ## Physics

A hollow, spherical shell with mass 2.00 kg rolls without slipping down a slope angled at 38.0 degrees. (a) Find the acceleration, the friction force, and the minimum coefficient of fricition needed to prevent slipping. You will find the moment of inertia

Assume a bank loan requires a interest payment of \$85 per year and a principal payment of \$1,000 at the end of the loan's eight-year life. a) How much could this loan be sold for to another bank if loans of similar quality carried a 8.5 percent interest

7. ## Physics

One end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle, theta, with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.390. A. what

8. ## math

Greg has a dollar bill, quarters, and dimes. how many ways can he make \$1.75?

9. ## Algebra

Solve the given polynomial equation. Use the Rational Zero Theorem and​ Descartes's Rule of Signs as an aid in obtaining the first root. 2 x cubed minus 5 x squared minus 5 x minus 1 equals 02x3−5x2−5x−1=0

10. ## CHE1

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2(l) → 2H2O(l) + O2(g) ΔH = -196 kJ Calculate the value of q (kJ) in this exothermic reaction when 4.60 g of hydrogen peroxide decomposes at constant

11. ## Physics

A woman with a mass of 50kg is standing on the rim of a large disk that is rotating at an angular velocity of .50 rev/s about an axis through its center. The disk has a mass of 110kg and a radius of 4.0m. Calculate the magnitude of the total angular

12. ## Physics

A cord is wrapped around the rim of a wheel .250 m in radius, and a steady pull of 40.0 N is exerted on the cord. The wheel is mounted on frictionless bearings on a horizontal shaft through its center. The moment of inertia of the wheel about this shaft is

13. ## physics

in a vessel of 40 cm3 of water at 4 ° C is introduced aluminum over 80g to 8 º C. neglecting the effect of the vessel, calculate final temperature

14. ## Chemistry

Find the pH during the titration of 20.00 mL of 0.2380 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54 10-5), with 0.2380 M NaOH solution after the following additions of titrant. (a) 0 mL Ive got the answer of 2.72 (b) 10.00 mL Ive got the answer of 4.81 I'm

15. ## college chemistry

When a solution containing 8.00 g NaOH in 50.0 g of water at 25 °C is added to a solution of 8.00 g of HCl in 250.0 g of water at 25 °C in a calorimeter, the temperature of the solution increases to 33.5 °C. Assuming that the specific heat heat of the

16. ## algebra2

how many solution are there to the equation below? 3x-10(x+2)=13-7x A.1 B.0 C.Infinitely many

17. ## Chemistry - Solubility

Calculate the solubility of copper(II) sulfide in a solution that is 0.150 mol L^-1 in NaCN. I am very confused on what to do. Since there are no common ions, I know that this is not the common ion effect. Also I do not believe this is a pH effect

18. ## algebra

The sqrt of 12x^4 sqrt12= sqrt(4*3)= sqrt4 * sqrt3 what is the sqrt4, and what is the sqrt x4 ? sqrt12= sqrt(4*3)= sqrt4 * sqrt3 what is the sqrt4, and what is the sqrt x4 ?

19. ## Physics

Forces F1=7.50N and F2=5.30N are applied tangentially to a wheel with radius 0.330 m. What is the net torque on the wheel due to these two forces for an axis perpendicular to the wheel and passing through its center? It depends upon whether or not the

20. ## math

Suppose you take out a loan for 180 days in the amount of \$13,500 at 11% ordinary interest. After 50 days, you make a partial payment of \$1,000. What is the final amount due on the loan?

21. ## geonetry

What is the area of sector CED when DE = 15 yd?

22. ## algebra2

How many solutions are there to the equation below? 145=10x-8x

23. ## Math

A bus is traveling at 79.7 kilometers Er hour east, how far does the bus travel 1.45 hours?

24. ## math homework

What is the perimeter of a triangle whose sides measure 21cm, 16cm, and 19cm?

25. ## Chemistry

If 45g of a 2.2% NaHCo3 solution is to be prepared how many grams of NaHCo3 are needed

26. ## algebra 2

how do i find the are of the region defined by |x|+|y| less than or equal to 5 and |x|+|y| greater than or equal to?

27. ## science

the patient reports numbness and tingling in the left lumbar area and pain in the contralateral femoral region

28. ## math

A new car comes in 5 exterior colors and 3 interior colors. How many different-looking cars are possible?

29. ## math

two vectors are defined as a=2i+xj and b=i-4j. find value of x if a) the vectors are parallel b) the vectors are perpendicular

30. ## English

Either Chris or the new employee _________ the mail before Dolores or Charles ____. a. sort/arrives b. sort/arrive c. sorts/arrives d. sorts/arrive

32. ## Math

Mr. Josie's investment decreased 25% in value. By what percent should its value increase so it can get back to its original value?

33. ## math

grant pays \$0.10 per minute plus \$5 per month for telephone long distance write an algebraic expression for m minutes of long distance calls in one month

34. ## math

a slice of pizza has 290 calories to find out how many write an algebraic expression to find out how many calories there are in a slices of pizza and b stalks of celery

35. ## math

the Nile River is the longest river in the world that 4160 miles a group of explorers travel along the entire now in xx days they traveled the same distance each day write an algebraic expression to find out each day's distance

36. ## math

the types of mini food players as it is triple plays in band is there in flute players write an algebraic expression to find out how many trumpet players there are

37. ## algebra2

is f(x)= x^3-x^2-9x+9 a one to one function

38. ## algebra2

How many solutions are there to the equation below? 220=2x-12x a.1 b. Infinitely many c.2

39. ## Math

There eight girls competing in an ice=skating competition. In how many ways can they finish in first, second and third place? 366 1,680 2,016 40,320 I think it is 2,016

40. ## psychology

PLEASE HELP LAST QUESTION.??? Among William James's contributions to the science of psychology is that he A. he wrote the first American text in psychology b.. developed a psychodynamic treatment for mental illness. c.experimented with classical

41. ## chemistry

A solution contains 3.10 g of solute in 10.4 g of solvent. What is the mass percent of the solute in the solution?

42. ## math 5th

in the following addition problem, each letter stands for a different digit. Find the value of X, Y, and Z XYZ + ZYX _______ YYZY

43. ## Macroeconomics

Consider the following data: The money supply in \$1 trillion, the price level equals 2, and real GDP is \$5 trillion in base-year dollars. What is the income velocity of money?

44. ## College Physics

Large boxes of pumpkins are set on a ramp to be unloaded out of a truck. The 300.0 lb boxes are set on the ramp which has an incline of 35 degrees. They must then be pushed to get started down the plane towards the bottom. If the coefficient of the static

45. ## Physics

Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?

46. ## Physics

Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?

47. ## chemistry

25mL of tap-water is titrated with .00500 M EDTA. 7.95mL of EDTA is required for complete reaction, Whatis the molarity of that total water hardness in the 25mL sample

48. ## Chemistry

At standard temperature a gas has a volume of 275ml if the temperature is increased to 130C buit the pressure is held constant what is the new volume?

49. ## statistics

John drives to work each morning and the trip takes an average of  = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of  = 5 minutes. For a randomly selected morning, what is the probability that John's

50. ## College history

Explain the meetings that resulted in the Japanese seeing "Rolls-Royce,Rolls-Royce,Ford" and how was this part of Americans "clamoring for the outlawry of war? I need help with this question because I don't understand the question and what exactly it is

51. ## algebra

6x-7x=20 what is the value of x-

52. ## physics

the mean radius of the earth is 6,000,000 meters. Express this value in kilometers

53. ## math

From a point on a straight road, two cars are driven in opposite directions, one at 44 miles per hour and the other at 35 miles per hour. In how many hours will they be 237 miles apart?

54. ## Science help plz

1. In an experiment, you remove the nucleus from an amoeba. Predict what will happen to the amoeba and explain why. plz help What does the nucleus do? Those functions would be absent. Since this is not my area of expertise, I searched Google under the key

55. ## Algebra

The school that Cody goes to is selling tickets to the annual dance competition. On the first day of ticket sales the school sold 13 adult tickets and 8 child tickets for a total of \$108. The school took in \$106 on the second day by selling 2 adult tickets

56. ## Philosophy

If there is no flood and we still have to evacuate, then the hurricane must pose other dangers. Turn into symbolic form Would the answer be: (~p & q) -> r

57. ## Philosophy

The harness does not fit tightly, the belay device is broken, and the bolts are loose. Turn into symbolic form Would the answer be: (~p & q) & r

58. ## English

Identify each as fragment, run-on, comma splice, or sentence. One legend has it that an old lady tried to dry off her sopping wet dog by putting it in the microwave this legend also predates the microwave oven. a. fragment b. run-on c. comma splice d.

59. ## Chemestry

What is the molecular mass of a gas that has a density of 0.897 g/L if it exerts a pressure of 1.35 ATM and is that a temperature of 43.5°C?

60. ## health

how to achieve a nutrition?

61. ## Math

There were 49 students in a gym class.if 3/7 were boys and the rest were girls, how many boys were in the gym

62. ## physics

a store advertises carpet that costs \$ 18.95 per square yard. how much does that carpet cost per square meter?

63. ## math

Alana picked p peaches. Michelle picked 18 times as many peaches as Alana. Write an expression that shows how many peaches Michelle picked.

64. ## math

Tucker bought 2 bags of beans. There are b beans in each bag. Write an expression that shows how many beans Tucker bought.

65. ## Math

Mr. Hernandez asked his students to estimate the area of the circular garden in front of the school. If the radius of the garden is 7 feet, which statement is closest to the area of the garden

ratio 1/3

67. ## Math

The point C(4 , -2 ) , D(2,1) and E(-1,-1) are translated onto C' and D' and E' by the vector find the coordinates of C' D' and E'

68. ## math

11 increased by twice Vanessa's age

69. ## Math

Mandy runs 4 km in 18 minutes if she planes to run in a 15 km race how long will it take her to complete the race

70. ## Chemistry-nudge the

A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C

71. ## Chemistry

A 4.30 g nugget of pure gold absorbed 298 J of heat. The initial temperature was 22.0°C. What was the final temperature? °C

72. ## Chemistry

Assuming ideal behavior, determine the mole fraction of acetone in a solution of acetone and water if the vapor pressure of acetone changed from 750mmHg to 735mmHg.

73. ## Math

Genrald and Michelle went on a 24-mile bike ride. They rode 1/4 of the distance before stopping. By lunchtime, they rode 5/8 of the total distance. How many miles did they have left to ride after lunch?

74. ## maths

How many red beads would there be in a pattern with 78 blue beads?

75. ## math

The greatest integer function ,shows below, is defined to be greatest________less than or equal to x. f(x)=[[x]]

76. ## algebra2

!@#\$%^& many solutions are there to the equations below? 8x+47=8(x+5)

77. ## algebra2

how many solutions are there to the equation below? 6x+30+4x=10(x+3) I want to know how to do this problems Please and Thank you

78. ## Algebra 2

What is the solution to this equation? 4(x-8)+10=-10

79. ## Science

What kind of substance has properties that reflects light very well, warms up in my hand, flattens out when it hits with a hammer and conducts electricity?

80. ## Trigonometry

Can you please help me verify these? >sin7x-sin5x= tanx(cos7x-cos5x) >(1-cosx)cot(1/2x) = sinx >1+tanx tan(x/2) = secx Its very confusing because of all the double-half angle formulas >_

81. ## Math: Finance

Need help solving these finance questions? PV = C/r PV= C/r-g P= D/r-g 1st: Tom is 30 years old today. His salary next year will be \$20,000. He forecasts salary growth of 5%/year and plans to retire at 60. 1) If the discount rate is 8%, what is the PV of

82. ## chemistry

how many moles of H2O are produced when 5.00 mols of oxygen gas are used

83. ## math

Finney & Company purchased \$1,800 of merchandise on 5/6. The terms were 2/15 EOM. The sneakers were received on 5/20, sent FOB Shipping Point. Freight charges amounted to \$45. What payment must be made by that date to take advantage of the discount?

84. ## math

Bert wants to make a larger version of a drawing he saw in a magazine. The drawing fits into a square with each side measuring 7 cm. If Bert makes his copy twice the size of the square measured in the original drawing, how much space will it cover on the

85. ## physics

f a police car is traveling along at 40 mi/hr and speeds up to 90 mi/hr to catch a speeder and it takes a total time of 1hr to finally catch the speeder. what was the police car's acceleration?

86. ## Math

Cepheid variables are vital for measuring the distances of relatively nearby galaxies. What is the probability of finding a cepheid variable star? State ALL your assumptions

87. ## math

ms.joliet gave a math quiz to see how her small group was doing. what score would make the median 90, the mode 85, and the range 20 if she had the numbers listed below 85,85,90,?,100,85,80,100,90

88. ## Math

Sally bought 3 tickets to the observation deck at the top of a skyscraper. She paid with a five-dollar bill and got 50 cents change. What was the cost of each ticket?

89. ## English

What public health issue starts the escalation of misery in "top of the food chain"?

How long to the nearest year, will it take an investment to double if it is continuously compounded at 4% per year

91. ## World Geography

When attacking Russia in 1941,Germany...

92. ## physics

How many significant figures are in 24.010

93. ## physics

a car skids to a halt at a rate of -9.4 m/s2. the skid marks measure 34 m. what speed was the car going when it slammed on the brakes?

94. ## algebra 2

how do i find the are of the region defined by |x|+|y| less than or equal to 5 and |x|+|y| greater than or equal to?

95. ## Physics

Large boxes of pumpkins are set on a ramp to be unloaded out of a truck. The 300.0 lb boxes are set on the ramp which has an incline of 35 degrees. They must then be pushed to get started down the plane towards the bottom. If the coefficient of the static

96. ## science

the patient reports numbness and tingling in the left lumbar area and pain in the contralateral femoral region

97. ## math

If Christopher wants to have the same number of hot dogs and buns, what is the minimum number of hot dogs he will have to buy?

98. ## economics

What do brokerage firms charge fees on

99. ## Math

I'm having a hard time with this problem. The book tells you the answer is 5, but I don't know how they got there. log(x+25)= 1+ log(2x-7)