# bianca

Most popular questions and responses by bianca
1. ## earth, science

Which of the following statements describes the development of the geologic time scale? A) Scientists developed the geologic time scale using fossilized remains from Europe and Asia. B) Scientists developed the geologic time scale by studying rock layers

2. ## chemistry

what volume of carbon dixoide (CO2) will be produced if 2.90 moles of iron (Fe) is produced

3. ## chemistry

Arrange the following aqueous solutions in order of increasing freezing points (lowest to highest temperature): 0.10 m glucose, 0.10 m BaCl2, 0.20 m NaCl, and 0.20 m Na2SO4.

4. ## Chemistry

how many moles of Ba(OH)2 are present in 295mL of 0.400 M Ba(OH)2?

5. ## geometry

Find the volume of a rectangular prism whose dimensions are twice those of another rectangular prism that has a volume of 120 cm3

6. ## Calculus

A rectangular page is to contain 8 square inches of print. The margins at the top and bottom of the page are to be 2 inches wide. The margins on each side are to be 1 inch wide. Find the dimensions of the page that will minimize the amount of paper used.

7. ## social studies

The Athenian assembly appointed 10 generals who a. collected taxes b. led armies into battle c. carried out the assembly's law d. tried to increase trade I think its B

8. ## physical science

if a block of wood drooped from a tall building has attained a velocity of 78.4 m/s, how long has it been falling?

9. ## science

According to the rock cycle, which of the following transitions are possible? Assume an unlimited number of steps. A. An intrusive igneous rock becomes a sedimentary rock. B. A sedimentary rock becomes soil. C. A metamorphic rock becomes an extrusive

10. ## physics

A bus and a car have an inelastic head-on collision. The bus has a mass of 1.5 × 103 kilograms and an initial velocity of +20 meters/second. The car has a mass of 9.5 × 102 kilograms and an initial velocity of -26 meters/second. What is their total

11. ## Math

assume that the speed of automobiles on an expressway during rush hour is normally distributed with a mean of 62 mph and standard deviation of 5 mph. What percent of cars are traveling faster than 62 mph? How would I work this problem out?? Thanks for any

12. ## Math

2 cm green square is painted on a triangle with a base of 6 and a height of 7. A dot will be randomly placed on the triangle. What is the probability the dot will be placed outside of the square?

13. ## Math

A drawer contains 22 black socks, 22 white socks, 22 blue socks, and 22 brown socks. If the light is off and Matt reaches into the drawer to get his socks, what is the minimum number of socks he must pull out in order to be sure that he has a matching

14. ## physics

A baseball pitcher throws a fastball at 51.6 m/s. If the batter is 18 m from the pitcher, approximately how much time does it take for the ball to reach the batter?

15. ## Math

The measure of one acute angle of a right triangle is twelve more than three times the measure than the other acute angle. Find the measure of each acute angle of the right triangle.

16. ## MATH

Juan has 28 paperback books. Each book is 1 1/4 inches wide. Will all his books fit on one shelf? If not, how many will fit and how many will have to go on another shelf? If yes, how many more paperback books, if any, will fit on the shelf?

Hi guys, please help me!1 I am having a tough time understanding this equation. Best answer goes to the person who shows there work. So... here is the equation... At the half time show, a marching band marched in formation. The lead drummer started at the

18. ## physics

Consider the static equilibrium diagram below. What is the net force acting along the positive x-axis?

19. ## chemistry/ partial pressure

N2 was collected over water at 25 degrees C. The resulting pressure was 705 torr. The vapor pressure of water at 25 degrees C is 23.8 mm. What is the partial pressure of N2?

20. ## Physics

A force of 400N is applied to a brass of length 1.9m and cross-sectional area 1.2*10^11, find the extension of the brass?

21. ## Social Studies

The Ancestral Puebloans were one of the most recent cultures of the Southwest.

22. ## Physics

A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving, (a) what is the acceleration of

23. ## math

a certain company makes inflatable swimming pools that come in four rectangular sizes.the length of each pool is twice the width and twice the depth.the pools are 1 foot ,2 feet,3 feet and 4 feet deep.what is the area of the surface of tge water of each

24. ## college

The width of a rectangle is 25% of the length. The perimeter is 250 cm. Find the width and the length of the rectangle.

25. ## math

Fill in the blanks y = 10x + 100 x y -20 ? -10 ? 0 ? 10 ? I don't see any blanks to fill in. Are they telling you values of y and asking you co compute x? Or vice versa? The spacing changed the format I had. the values for x are -20, -10, 0, 10 now I need

26. ## english

select the antecedent of the pronoun in the following sentence:The students will take their final exams before the classrooms are renovated. a.student b.their c.exams d.classrooms

27. ## Chem II/College

Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?

28. ## math

Indira bought 6 yards of material for drapes and a bag of buttons. She spent a total of \$39. If the buttons cost her \$3, how much was each yard of material?

what kinds of energy take place when you turn a light switch on?

30. ## Science

A basketball is dropped from a height of 2m and has a rebound of only 1.5m. what happened to that energy that was lost?

Dear Tutor, I have to do a current event for Physical Education on basketball. My problem is that I don't know anything about basketball and my coach wants it to be on a famous basketball team that has recently played. Can you help me find an article. I am

32. ## physics

A shopper pushing a cart through a store moves 30.0 m south down one aisle, then makes a 90◦ turn and moves 11.0 m. He then makes another 90◦ turn and moves 22.0 m. What is the magnitude of the smallest possible displacement the shopper could have? You

33. ## math

Gina cut a piece of ribbon into 3 equal pieces. Then she cut 2 inches off one piece to make a piece 3 inches long. How long was Gina's original piece of ribbon?

34. ## ALGEBRA

Find an equation in slope-intercept form passing through the points (2,5) and (7,-3). M=(-3,-5)/(7,-2) M=-8/5 IS THE SLOPE [Y=MX+B] 5=-8/5*2+B 5=-16/5+B 5+16/5=B (25+16)/5=B 41/5=B THE Y INTERCEPT Y=-8X/5 +41/5 HOW WOULD I SHOW A GRAPH ON THIS PROBLEM?

35. ## algebra

Mixture Problems Template – Price Problems Copy the problem from the lesson: 1. A store manager wishes to reduce the price on her fresh ground coffee by mixing two grades. If she has 50 pounds of coffee which sells for \$10 per pound, how much coffee

36. ## Multiplicative inverse

Is the multiplicative inverse for 12/13 13/12?

37. ## math

The measure of the supplement of an angle is 20 degrees more than three times the measure of the original angle. Find the measures of the angles.

38. ## math

1. Number Sense: write three numbers that are greater than 1,543,000 and less than 1,544,000 2. Put the planets in order from the one closest to the sun to the one farthest from the sun. Earth 93,000,000 Jupiter 483,000,000 Mars 142,000,000 Mercury

39. ## math

given geometric series is 256+p+64-32 determine the value of p?

40. ## math

What is 1/10 of 200?

41. ## english

identify the object of the preposition in the following sentence:the young boy put his shoes under the bed

Dear Tutor, I have to do a current event for Physical Education on basketball. My problem is that I don't know anything about basketball and my coach wants it to be on a famous basketball team that has recently played. Can you help me find an article. I am

43. ## Chem II

Calculate the pH of 500. mL of 0.100 M acetic acid, CH3COOH, which also contains 0.100 mole of sodium acetate, NaCH3COO. How do you set this up step by step?

44. ## Chem II

Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.

45. ## algebra

The question is: You plan on attending a picnic for the up coming holiday. You can either go to your sister's picnic who lives 10 miles west of your house or to your friends picnic who lives 10 miles east of your house. write an absolute value inequality

46. ## physics

The two sets of magnetic-field coils,used to form the pictures on the screen, are _______ to each other. Parallel or perpendicular

47. ## Science

A stone with a mass of 225.0g is placed into a graduated cylinder with a starting volume of 200.0ml. If the water in the cylinder is displaced to 225.0 ml, calculate the volume of the rock and its density.

48. ## math

Trey keeps sports cards in 3 drawers. Each drawer contains exactly 120 cards. In each drawer 2/3, of the cards are baseball cards, and 1/3 of the cards are a mixture of football, hockey, baseball, and soccer cards. If Trey decides to trade 1/4 of his

49. ## calculus

Evaluate the integral ((6x+7)/(x^(2)-8x+25))dx. Please and thank you.

50. ## science

which of the following are not examples of centripetal acceleration

51. ## science

why do you think some stalactites grow without a stalagmite below them, or some stalagmites grow without a stalactite above them?

52. ## Math

Which nonstandard measurement unit is closest to a decimeter? the width of your hand or the length of your arm

I am doing a crossword puzzle that has statements that you write their answers in the right column. I have two that I can't get. Heart of a scientific investigation what I have so far: --e-t-- standard of comparison for checking the results of an

54. ## American Politics

Which of the following was a primary influence on the Framers as they drafted the Constitution? A. French Revolution B. French and Indian Wars C. advocacy for states' rights by John Adams. D. revising the Articles of Confederation Is D. the answer

55. ## english

which sentence contains a verb in the simple past tense? a.the patient complained of pain in the knee. b.the patient had complained of pain in the knee. c.the patient complains of pain in the knee. d.the patient will complain about pain after surgery

56. ## Math

HELP! i have no idea how to do this! A rabbit population satisfies the logistic equation dy/dx=2x10^7y(10^6-y), where t is the time measured in months. The population is suddenly reduced to 40% of its steady state size by myxamatosis. If the myxamatosis

57. ## chemistry again

If you are given V1=410 ml T1= 27 C= 300 K P1= 740 mm Find V2 in ml at STP When given STP= 273K and 1 atm

58. ## Math

Harry has test grades of 85, 87, and 77 on his first three algebra tests. What must he get on his fourth test to earn an average of at least 84?

59. ## algebra

(3+2)^2 x 6^9

60. ## algebra

the equation y=1777x+27,153 can be used to predict the number Y of gun deaths in the US X years after 2000, that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=4 corresponds to 2004, and so on. Predict the number of gun deaths in 2004 and 2009, In

61. ## algebra

Dertermine whether ech binomial is the difference of two squares, If so, factor it, if not explain why? -m^6 36s^2-4t^2 9b^4-200 x^2-16 x^2y^2+196

62. ## question

A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 180 degrees

63. ## algebra

Abraham Lincoln, gettysburg address begins with the phrase (four score and seven years ago.) He was refering to a period of time that was 87 years long. How many years are represented by a score? is the answer 2 or is it 12.43

64. ## Algebra

My instructions are to solve the problem by showing the steps and identify as a conditional equation, an inconsistent equation or an identity. 0.06q + 14 = 0.3q - 5.2 You can convert that to 0.24 x = 19.2 and solve it for x. The original equation is

65. ## Math

Father Armando the math teacher adds Bens and the Indians scores atop each other and gets these numbers. 1, 2, 6, 7, 10, 12 Also, go back for Seconds.

66. ## bio

A large population of laboratory animals has been bred randomly for a number of generations. There was an interesting revelation. The scientists noted that there was neither an increase nor a decrease in the frequency of animals displaying the recessive

67. ## Chemistry

A sample of oxygen gas at 295 kPa takes up 456 L of space at standard temperature (the “T” in STP). What is the new volume when the pressure is lowered to standard pressure (the “P” in STP)?

68. ## math

The blackberry cobbler recipe makes 8 equal servings. Nina, Jack, and Cameron each ate 1/4 of the servings. How many servings of cobbler were left over?

69. ## calculus

Evaluate the integral: ç[(6x+7)/(x^(2)-8x+25),x]

70. ## algebra

What is an example of a real life situation that could be modeled by a function.

71. ## algebra

Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. Find the area of a rectangle if three of its corners are (-0.1,-3.4), (-7.9,-3.4), and (-0.1,6.8). one I draw the graph how do I figure

72. ## algbra

Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. Find an equation in slope-intercept form passing through the points (-6.2,18.1) and (-3.4,18.1).

73. ## algebra

A consumer electronics company sells 6.7 million MP3 players per month at a price of \$100 apiece; when the price is lowered to \$80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price

74. ## Physics

The shuttle is orbiting the earth at a distance of 500km above the earths surface. Assumingan astronaut has a mass of 72kg, what is the force of gravity upon him or her? You may assume the earth has a mass of 5.98 x 10^24kg and a radius from the center to

75. ## Chemistry

I made a graph and i used line of best fit. How do i find the slope of the line?

76. ## Multiplicative inverse

Is the multiplicative inverse for 12/13 13/12?

77. ## Algebra

What is 9m+2m-8=5(m-2)

78. ## algebra 1

i don't know how to solve the following: 3(x+2y)+\$(3x+y)

79. ## trig

Two men on the same side of a tall building notice the angle of elevation to the top of the building to be 30o and 60o respectively. If the height of the building is known to be h =120 m, find the distance (in meters) between the two men.

80. ## Chemistry

a volume of 50mL of a standard HCl solution is needed to neutralize 50 mL of 1x10-2 M NaOH. what volume of this HCl solution is needed to neutralize 50 mL of 1x10-2 M Ba(OH)2

81. ## Math

Mark hid a \$10 bill inside his favorite book. He forgot the pages where he hid it. If the sum of the pages where the bill is hidden is 177, on what pages will Mark find his money?

82. ## bio

The frequency of an allele ‘a’ in a natural population is 0.49. What percentage of the population is homozygous for this allele? Calculate the exact value; do not round up or give an estimate. Answer in units of %.

83. ## Organic Chemistry

Which is more polar trans-methyl cinnamate or trans-chalcone?

84. ## Collega Algebra

Let f(x) = (2/4^x + 2) for real numbers x. Evaluate f(1/2001) + f(2/2001) + ... + f(2000/2001).

85. ## math

What is 1/10 of 200?

86. ## american history

The federalist papers______________ A. Were written to persuade the public to support ratification of the Constitution. B. were an attack against the Framers and supported continuation of the Articles of Confederation. C. were written by three of the

87. ## Science

The dimensions of an object are 3.5 cm, 3.5 cm, and 2.9 cm. Its mass is 6.0g. Calculate the volume and density of the object. Will it float or sink? Please help me with my other question too. Thank you !!!

88. ## english

in which of the following sentence is the verb in the active voice?a.the boy was called by his mother. b.we were told that jim is ill. c.the telephone bill was paid yesterday.d.the mother called her son for lunch.

89. ## science

please give me 10 examples of suspension

90. ## Math

The perimeter of a rectangular soccer field is 20/3 meters. If the width of the soccer field is the reciprocal of the length, find the dimensions of the soccer field.

91. ## Math

The sum of the reciprocal of 5 and the reciprocal f 7 is the reciprocal of what number?

92. ## geometry

Find the height of a cone with a volume of 138 cubic meters and a base area of 46 square meters

93. ## geometry

Find the height of a cone with a volume of 138 cubic meters and a base area of 46 square meters

94. ## chem 110

if a 72g.ofHCL( molar mass=36g./mol) is in 200-ml what is the molarity

95. ## math

one side of a triangle is 1.5 inches long.the two angles it touches are 30 and 100 degrees

96. ## geometry

A pole makes an 85 degree angle with the ground what is the measure of the angle the pole makes with the vertical?

97. ## CRIMINOLOGY

what are some social conflicts with the death penalty?

98. ## CRIMINOLOGY

What types of social conflict exist in American culture today? Are they productive conflicts, producing results for those who need help?

99. ## algebra

The final grade for a particular course is calculated by dividing total points earned by total points available. There are 120 points available in the first half of the course, and 140 points in the second half of the course. If a student earns 81% in the