# gina

Popular questions and responses by gina
1. ## Math- probability

Suppose 80% of kids who visit a doctor have a fever, and 30% of kids with a fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat? Round to three decimal places.

2. ## Geometry/Trig

In triangle ABC, A is a right angle, and m b=45 degrees. What is the length of BC? If your answer is not an integer, leave it in simplest radical form. a. 16 ft b. 16 sq 2 ft c. 16 sq 3 ft d. 32 ft I'm really confused as to how to do this... Could someone

3. ## Chemistry

A 22.5 gram sample of ammonium carbonate contains ? mol of ammonium ions?

4. ## Math

The probability of drawing a peppermint candy out of a jar of 25 candies is 1/5. How many more peppermint candies should be added to the jar in order to increase the probability of drawing a peppermint candy to 1/3? (A) 5 (B) 10 (C) 15 (D) 30

5. ## Physics

A pilot of mass 65 kg in a jet aircraft makes a complete vertical circle in mid-air. The vertical circle has a radius of 1.70 km at a constant speed of 215 m/s. Determine the force of the seat on the pilot at (a) the bottom of the loop and (b) the top of

6. ## chemistry

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?

7. ## science

use water displacement to find the volume of four marbles in ml

8. ## science

is paper towel a conductor or insulator? How good does it conduct or insulate. insulator. Dry paper is a good insulator.

9. ## Biology

1.A white flowered plants is crossed with a plant that is heterozygous for the trait. What percentage of he offspring will have purple flowers? 2.Two plants, both heterozygous for he gene that controls flower color are crossed. What percentage of their

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

11. ## Math

There are 8 standard classifications of blood type. An examination for prospective laboratory technicians consists of having each candidate determine the type for 3 blood samples. How many different examinations can be given of no 2 of the samples provided

12. ## chemistry

what is the pH if you mix 250ml of 3M HCl with 500ml of 1.5M CN-? i know that: HCl+CN- ---> HCN+Cl- 250ml converts to .75 moles and 500ml also converts to .75 moles when using the 3M and the 1.5M. Ka=X^2/m-x x/1000=.015/750 .02 CN- left.

13. ## Physics

The position of an object as a function of time is given as x = At3 + Bt2 + Ct + D. The constants are A = 3.2 m/s3, B = 1.8 m/s2, C = −4.2 m/s, and D = 7 m. At what time(s) is the object at rest?

14. ## math

Express 39% as a decimal.

15. ## Physical Science

In which of these processes is an element of matter changes into a completely different element.....nuclear fusion, nuclear fission, neither, or both? Please note that we don't do students' homework for them. Once YOU have attempted to come up with a

16. ## chem

While the pressure of 1.40L of gas is kept constant, its temperature is increased from 27 degrees Celcius to 177 degrees Celcius, How do I calculate the new volume?

17. ## Math-probability

A sporting goods store estmates that 20% of the students at a nearby university ski downhill and 15% ski cross country. Of those who ski downhill, 40% also ski cross country. What percentage of these students ski both down hill and cross country? Write as

18. ## chemistry

need answer to the following: for each molecular compounds, write the name corresponding name or write chemical formula to: A)nitrogen pentasulfide B)diphosphorus pentasulfide C) AS2S3 D)PBr5

19. ## Spanish

Help me unscamble these spanish words. rbaali mtirpaa proe rlaguer biecrisr tacarn bleriter Thanks!

20. ## Math

I bought a pair of shoes for \$51. The shoes were already marked 75% off. What is the original price of the shoes.

21. ## math

How much money must be invested at 6.3 % simple interest to earn \$250 in interest each month?

22. ## Physics 1

A man opens a 1.14-m wide door by pushing on it with a force of 49.5 N directed perpendicular to its surface. (a) What magnitude torque does he apply about an axis through the hinges if the force is applied at the center of the door? N · m (b) What

23. ## science

what is the concentration of a solution made by mixing 22.0 g of salt with 200 mL of water? assume that the volume of the water does not change when the salt is added

24. ## Chemistry

A student reacted 0.500g of Pb(NO3)2 with 0.750g of KI according to the reaction, Pb(NO3)2(aq) + 2KI(aq)=PbI2(s) + 2KNO3(aq) A) How many moles of Pb(NO3)2 were used? B) How many moles of KI were used? C) How many moles of PbI2 would form, based on the

25. ## Geometry

tree is 6ft 3 in compute the cross-sectional area of the tree measured at 3 feet above ground

26. ## chemistry

Considering a 1.0M of each solution, which has the greatest osmolarity? 1. FeCl3 2. K2O 3. HCl 4. HC2H3O2

Math Word problem with factoring...HELP!!! This questions has me stumped!? I have been working on it for days... A 10ft-by-15ft pool was installed in your backyard. You have \$3000 left that you would like to spend on surrounding the pool with a patio,

28. ## Chemistry

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added

29. ## physics??

Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the

30. ## ghemistry

which indicator is more reliable in the titration of H3PO4 with NaOH using methyl orange and phenolphthalein as indicators

31. ## Physics

A rabbit runs in a garden such that the x- and y-components of its displacement as function of times are given by x(t) = −0.44t2 − 6.0t + 73 and y(t)= 0.35t2 + 8.3t + 34. (Both x and y are in meters and t is in seconds.) (a) Calculate the rabbit's

32. ## Physical Science

In a one-g gravitational field, in one second, a light beam will curve beneath a perfectly straight line by.....Less than 4.9 m, 4.9m, or more than 4.9m?

33. ## Grammar

Could you please correct my mistakes. You've described a warm friend who's cooling off. You've- subject described- verb a- adjective warm- adjective friend- direct object who's- who: direct object/ is: verb cooling- verb off- preposition Corrected: You -

34. ## English

What is the meaning of this poem? A single flower he sent me, since we met. All tenderly his messenger he chose; Deep-hearted, pure, with scented dew still wet-- One perfect rose. I knew the language of the floweret; "My fragile leaves," it said, "his

35. ## chemistry

balancing IO3^- (aq) + I^- (aq) > I2 (aq) , using the half reactions method

36. ## Math

1/3(39x-24)=187 X=15

37. ## Math

A curve is such that dy/dx=2-8(3x+4)^-0.5 The curve intersects the y-axis where y=4/3 Find the equation of the cure.

38. ## English

If you could come in on Sunday,that would be grest. How many independent and subordinate clauses

39. ## Algebra

If 4x^2+20x+r=(2x+s)^2 for all values of x, what is the value of r-s? Can you please help me?

40. ## English

In Romeo and Juliet, which of the following illustrates Shakespeare's use of comic relief? A) A servant explains to Capulet that cooks should lick their own fingers. B) Capulet believes that Juliet is dead when she is really only sleeping. C) "Honest good

41. ## MATHEMATICS

A SECTOR IS USED TO FORM ACONE IF THE RADIUS AND ANGLE OF THESECTOR IS 8CM AND 160 DEGREE RESPECTIVELY CALCULATE, THE RADIUS OF THE CONE ,VERTICAL HEIGHT, VERTICAL ANGLE, VOLUME AND TOTAL SURFACE AREA OF THE CONE

42. ## Biology

Which statement is not true regarding illness associated with malfunctioning cellular organelles? The illness _____ a. can result in a diverse set of sumptoms b. may impact multiple body systems c. is typically simple to diagnose d. may be lethal

43. ## Vocabulary

"In a large metropolitan airport, an air terminal at the edge of a major city, it is not unusual to have many landings and take-offs during a 24-hour period." The word "metropolitan" in the line above most nearly means A) international and domestic B)

44. ## Math

The best free throw shooter on a basketball team has a 60% chance of making the 1st shot when shooting 2 free throws. If he makes the 1st shot, he has an 80% chance of making the 2nd. If he misses the 1st shot, he only has a 40% chance of making the 2nd

45. ## Chemistry

1.) Explain the similarity between Mg(OH)2 and Zn(OH)2 in particular why would any insoluble hydroxide tend to dissolve in an acidic solution? Are they both bases? 2.) Explain the difference in particular how does Mg^+2 appear to form complex ions with

46. ## Calculus

Find the degree 3 Taylor polynomial approximation to the function f(x)=8ln(sec(x)) about the point a=0 .

47. ## Chemistry

the solubility of aluminum sulfate in water at 20 degrees celcius is 26.7 g/100mL Calculate the molarity?

48. ## chem

The total pressure in a vessel containing hydrogen collected over water at 25degrees Celsius was 0.8atm. the vapor pressure of water at the temperature is 23.8torr. What was the pressure of the oxygen in torr?

49. ## Math

maria works 8 hr shifts.she has earned 62.75 mins of sick time. how many sick days does she have

50. ## algebra

Do you like roller coasters? If you were asked to design a roller coaster, what would it look like? Would it have steep hills? Would you design the tracks to go upside down? Did you know that polynomial equations are used by the structural engineers who

51. ## chemistry

For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?

Experience in investigating insurance claims shows that the average cost to process a claim is approximately normally distributed with a mean of \$80. New cost-cutting measures were started and a sample of 25 claims was tested. The sample mean of the costs

53. ## finance 370

How did they round this number off. Value debt310 million +110 value equity million=.738=73.8% Then Value Equity over Value Of Debt +Value of Equtiy \$310 million + 110 million=0.262=26.7% How did they get these number

54. ## math

how do i solve for x when x = log(32.5)? here's my work: log x = y 10^y = x then, x = log (32.5) 10^x = 32.5 10^x = 17/2 this is where i get stuck... i don't know how to get rid of the bases... can some one please teach me how? thank you! :)

55. ## CHEMISTRY (HELP)

Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the

56. ## Chemistry

Which of the following is true about the reaction between sodium bromide and silver sulfate? 1. No reaction 2. Total ionic equation is identical to the net ionic equation 3. Sodium ions and sulfate ions are present in the toal ionic equation but not in the

57. ## math

A cone has a slant height of 10 centimeters and lateral area of 60pi square centimeters. What is the volume of the sphere with a radius equal to that of a cone? -we tried solving and got 4.37 or so for the radius and we couldn't get any further than that

58. ## Chemistry

A student titrates 0.100M KOH, potassium hydroxide, into 50.0ml of 0.10M HCOOH, formic acid (Ka=1.8 x 10^-4. What is the pH of the mixture after 25.0ml of the KOH has been added

59. ## Math

Today, Harry mowed the lawn and weeded the garden. Usually, he mows the lawn every 6 days and weeds the garden every 4 days. How many days is it until Harry will again mow the lawn and weed the garden on the same day?

60. ## Math

Karla walks 8/10 mile to the library. About how many miles does she walk?

61. ## chemistry

how do you find the Kc of a reaction?

62. ## Chemistry

Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal

63. ## PHYSICS CIRCULAR MOTION

In an automatic clothes drier, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.364 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an

64. ## physics circular arc

A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 68.0 m. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road.

65. ## physics

A 850-kg race car can drive around an unbanked turn at a maximum speed of 61 m/s without slipping. The turn has a radius of 160 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 11000 N on the car. (a) What is

66. ## Physics circular motion

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the centripetal acceleration of a

67. ## PHYSICS

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27.8 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 196 m), the block swings

68. ## Chemistry

A student dissolves 2.57 grams of iodine [molar mass= 257]in 10.0 grams of carbon tetrachloride [kb = 5.03C/m]. The normal boiling point of carbon tetrachloride is approximately 77degreesC. What is the approximate boiling point of the solution above?

69. ## Physics

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol

70. ## Physics

At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 14.6 m, the bottom of the wheel is 1.1 m above the ground and its rim is

71. ## statistics

The weights of individual nails produced by the 'Hammer 'n Nail' hardware company follow a normal distribution with the average nail weight being 5.1 grams and the standard deviation in nail weight being 1.6 grams. When a nail is produced it is discarded

72. ## Physics

You serve a tennis ball from a height of 1.8 m above the ground. The ball leaves your racket with a speed of 19.4 m/s at an angle of 7.28° above the horizontal. The horizontal distance from the court's baseline to the net is 11.83 m, and the net is 1.07 m

73. ## Physics

A golf ball is hit with an initial angle of 30.5° with respect to the horizontal and an initial velocity of 81.9 mph. It lands a distance of 86.8 m away from where it was hit. By how much did the effects of wind resistance, spin, and so forth reduce the

74. ## Physics

A machine carries a 3.0 kg package from an initial position of di = (0.50 m) + (0.75 m) + (0.20 m) at t = 0 to a final position of df = (7.30 m) + (11.0 m) + (7.20 m) at t = 14 s. The constant force applied by the machine on the package is F = (2.00 N) +

75. ## economics

how might these trade restrictions on imported goods affect the japanese economy

76. ## economics

an accurate statement about the great depresson is

77. ## Science

Radioactive carbon-14 dating has determined that a fossil is 5.7 x 10 to the third power years old. What is the total amount of the original Carbon-14 still present in the fossil?

Posted by Gina on Monday, April 20, 2009 at 2:39pm. what is ethic of following situations? 1) A researcher plans to code questionnaries in an employee survey using invisible ink. 2) A researcher is planning to videotape users reactions to a new product in

79. ## science

What is an Isogenerator?

80. ## physics-mechanics

a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?

81. ## physics-mechanics

a person walks 400m north along one side of a rectangular field and then 300 m along the other side, the walk takes 10 min, calculate the av. velocity of the person?

82. ## science

Why does air flow from high to low pressure?

85. ## Editing

On this hwk help forum, do you edit people's work? I have a paragraph and I need someone to look it over and make some corrections. Would anyone be willing to do that?

86. ## CHemistry

what is the molecular geometry for the following elements A) SeB4 B) carbonate ion C) XeF5+ D) ammonium ion E) phosphorus trichloride can someone tell me if im right with my anwsers and if im wrong what is the correct anwser? a-trigonal bipyramid b-

87. ## CHEMISTRY HELP NOW PLZ!

which of the following coordination compounds will most likely form a precipitate when treated with an aquesous solution of silver(l) nitrate? A) [Cr(NH3)2CL3] B) [Cr(NH3)6]Cl3 C) [Cr(NH3)Cl]SO4 D) Na3[Cr(CN)6] E) Na[CrCl6] i think its either a or b but i

88. ## Physical Science

The atom number of an element is the same as its.....protons, neutrons, or nucleons? same at the protons, same as the electrons Since this is not my area of expertise, I searched Google under the key words "atomic number" to get these possible sources:

89. ## Physical Science

Important support for General Relativity came from studies of the precession of the orbit of....what planet? It wasn't precession, it was rotation of the major axis direction of the elliptical orbit, also called "perihelion shift". The planet was Mercury.

90. ## Science

What is the function of the right brain and why is it important in optical illusions? Since this is not my area of expertise, I searched Google under the key words "right left brain illusions" to get these possible sources:

91. ## Math

.002 + e i m + E 1/2n+

92. ## Grammar

I am having trouble with identifying what thw words in a sentence are and groups of words. I will write a random sentence and could you please identify the words I have choosen. I will look at what you have choosen and understand why you have choosen so.

93. ## English

What is, "object of a preposition." This site will help. http://www.ucalgary.ca/UofC/eduweb/grammar/course/speech/1_5a.htm Simply, the noun following a preposition is the object. ( the rabbit ran) over the HILL, under the LOG, and behind a ROCK. Hill, log

94. ## Quick Math

I still have a question. My first one has been answered(I, but I am going to write it down anyways, incase it realtes to the first quesion. (I)What is the cost of s dozen dozen apples at half a dozen dimes a dozen? (II)(This one I don't understand) What is

95. ## English

What does the quote bellow in your own words mean: “And thus the whirligig of time brings in his revenges.” Go back to several of the previous answers...

96. ## Easy Math

The number of positive integers that are less than 500 and that are not divisable by 2 or 3 is? There are 250 divisible by 2, 166 divisible by 3 and 83 divisible by both. So 250 + 166 - 83 = the numbers divisible by 2 or 3, without double counting.

97. ## Fractions and Integers

If x/4+y/5=19/20 where x and y are positive integers then x+y is? If you multiply through by 20 then you'll have 5x+4y=19 where x and y are positivie integers. Can you solve that? Hint: you only need to look at the integers less than 4. Thanx a lot.

98. ## math

How much money do you need to invest each month in a retirement fund with an interest rate of 7% compounded monthly in order to have a million dollars by the time you are 65. Assume you are 18. What was the total amount that you invested? How much interest

99. ## science

which foods are lipids found in