# marco

Popular questions and responses by marco
1. ## Algebra

Your math test scores are 68 78 90 and 91 what is the lowest score you can iron on the next test and still achieve an average of at least 85

2. ## Math

How is constructing a perpendicular bisector similar to constructing an angle bisector's? How is it different? Help I’m sick with this

3. ## English

I am reading "rise of the image culture: Re-Imagining the American Dream" by Elizabeth Thoman. The link to the article can be found by googling "rise of the image culture" Any help would be greatly appreciated.

Line AB contains points A (-8, -4) and B (1, -5). The slope of line AB is A. -7 B. -1/7 C. 1/7 D. 7

5. ## MATH

FIND EACH ESTIMATE: 1) A RARE TRUFFLE ONCE SOLD FO \$13.20 FOR A 0.44 OZ CAN. APPROXIMATELY HOW MUCH WOULD 1LB OF THIS TRUFFLE COST? 2) THE LENGTH OF THE LONGEST LOAF OF BREAD MEASURED 1,405 FT 1 3/4 IN. IT WAS CUT INTO SLICES 1/2 IN. THICK. HOW MANY SLICES

6. ## Spanish

What does this mean? "¡Viva el espanol!" I looked up on an online translator and is said "Spanish lives". Is that correct though? Is that what it would really mean in spanish? Thanks for your help! it means long live spanish THanks! Be careful with using

7. ## math

Which shows a perfect square trinomial? 50 y squared minus 4 x squared 100 minus 36 x squared y squared 16 x squared + 24 x y + 9 y squared 49 x squared minus 70 x y + 10 y squared

8. ## English Essay

Doing a summary response essay, looking for comments, suggestions, corrections thanks!!!!!! I see them. We all see them. They are powerful, hypnotic and persuasive. Images. We cannot pry our eyes from them. We can shut the books and magazines if we do not

9. ## Math riddle

What is one problem That Rocket Scientist, Dr. Awkward, never has?

10. ## Biology

Plants have cells that contain chloroplasts. Why must their cells contain mitochondria as well? Chloroplasts are the sites of photosynthesis. Mitochrodria is the site of energy synthesis.

11. ## Social studies

Learning about the declaration of independence The. First two paragraphs. Question 1. What did the colonist feel was. Necessary? I wrote: the colonist felt they must breah their political ties with Britain

12. ## Algebra

3. Find the slope of each line with equation as given. a) Y=4 b) X=2 Answers: a) zero b) undefined 4. Graph the following equations: a) 3x-2y=6 answer: (2,0) and (0,-3) b) 5x+3y=6 (need help with this one) Are they correct and would need help with b.

13. ## biology

With each cell division , the chromosomes are divided between 2 daughter cells, yet the number of chromosomes in each cell does not change. What process ensures that the normal number of chromosomes is restored after each cell division? During which part

14. ## Grammar

Can someone correct my answers, please? I really need help! (Underlined words have parenthesis over them, and anything with asterisks by them means that's what I believe the answers are.) 6. Choose the function of the underlined word in the sentence. Call

15. ## Number sequence

Find the next 3 numbers of this sequence 243, 81, 27.

16. ## physics

a 0.75 kg mass attached to avertical spring streches the spring 0.30m. what is the spring constant? the mass-spring system is now placed on the horizontal surface and set vibrating. what is the period of the vibration?

17. ## physics problem

A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 175 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle?

18. ## History

Which of following statements is true about life African Americans in the colonies

19. ## Soc studies

What are the differences between the 1st and 2nd continental congress and their outcome?

20. ## Declaration of independence

In first 2 paragraphs. Of declaration. Why are governments set up? Governments are set up to secure the rights of people. Is this correct

21. ## Math

Confused on permutation or combination on this question: A VISA credit card has a first digit of 4 followed by 15 other digits. How many different VISA accounts does this allow? I know the formulas but I am having a hard time determining which one to use.

22. ## Chemistry

Which of the following substances has the greatest solubility in water? A. Ca(OH)2, Ksp = 6.5 × 10-6 B. Ag2SO4, Ksp = 1.5 × 10-5 C. PbI2, Ksp = 7.9 × 10-9 D. Zn(IO3)2, Ksp = 3.9 × 10-6 E. BaF2, Ksp = 1.5 × 10-6

23. ## Algebra

1. Write the equation of the line with the given slope and y-intercept a) m=3/8 and b=6 Answer: y=3/8x +6 b) m=-2 and b=11 Answer: y=-2x+11 c) m=0 and b=6 Answer: y=x+6 Correct?

24. ## English

Is this a good thesis about the film guess who is coming to dinner? The 1967 film, Guess Who’s Coming To Dinner at initial viewing shows that racial relations have come a long way, however, close scrutiny of the film reveals that racial prejudices are

25. ## Science --

If you mixed 25.00g of salt in 100.00mL of water and it all dissolved, what would the concentration be in g/mL?

26. ## History

Hi can you help me find a website for teens in the 1920's and a journal on it.

27. ## Math

Find the product write answer in scientific notation (3 x 10^6) * (2 x 10^12) I got. .6 x 10^ 9

28. ## Math 9

2 planes leave the airport at the same time. Minutes later plane A is 70 miles due north of the airport. Plane B is 168 miles due East of the airport. How far apart are the 2 airplanes. ? I think 98 miles apart. Is that right?

29. ## Math word problem

A fire and rescue squads places a 15 ft ladder against a burning building. If he ladder is 9ft from the building how far up will the ladder reach? I got 17.5 ft Is that right?

30. ## Math

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

31. ## physics

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

32. ## algebra

X-5/3 =1 Or X - 5 = 1 ______ 3 I'm trying to type and tell you it's x-5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply

33. ## Pls check math

3+2(4)-3+4(-3)= I got -4 3+4-2-5+3-6-8= I got I can't figure out I got -17 4-3(2+6) = I got. -20 10/5 + 8+(-3) /5 -4= I got -1

34. ## Math

I need to identify property. For r (l) = r Would this be inverse property for multiplication?

35. ## Declaration of indepen

In first to paragraphs of declaration. Where do governments get their powerf? I wrote they get their power from the consent of the governed people. Is this correct?

36. ## physics

Dolphins emit clicks of sound for communication and echolocation. A marine biologist is monitoring a dolphin swimming in seawater where the speed of sound is 1522 m/s. When the dolphin is swimming directly away at 7.9 m/s, the marine biologist measures the

37. ## physics

A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity by a factor of 355. When a jet aircraft is taking off, the sound intensity level experienced by the crew member is 72 dB. What sound intensity level would

38. ## physics

The drive propeller of a ship starts from rest and accelerates at 3.00 10-3 rad/s2 for 2.05 103 s. For the next 1.75 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing

39. ## Geometry

The hypotenuse if a right triangle measures 9 inches and one of the acute angles measures 36 degress. What is the area if the triangle? Round to the nearest square inch.

40. ## 3 states of matter

hi can you please help me by giving some facts on the 3 states of matter solid liquid gas

41. ## Math-Factoring

Factor completely. 10x^2yz^2 + 15xy^3z I came up with 5xyz(2xz+3y^2) Correct?

42. ## Physical Science

How many calories of heat are required to raise the temperature of 550g of water from 12.0 degrees celcius to 18.0 degrees celcuis

43. ## College English

I have been asked to present a gist statement and I am just looking to find out if I understood the concept. Below is what I've been asked to analyze: We see them everywhere: on billboards, in magazines, on bus placards. They come in the mail and in our

Can you help write an extended metaphor comparing me to an m & m?

45. ## Biology, Cell Division

With each cell division , the chromosomes are divided between 2 daughter cells, yet the number of chromosomes in each cell does not change. What process ensures that the normal number of chromosomes is restored after each cell division? During which part

46. ## geometry

draw a diagram to explain how it is possible for 2 central angles to be congruent, yet their corresponding minor arcs are NOT congruent. Please help! thanks! (3z-5)degrees (5z-47)degrees Find the value of z and m

47. ## biology

Why is CO^2 required by plants to produce glucose? ( the arrow pointing up should be pointed down.) CO2 is where the Carbon comes from to make sugar.Glucose is a six-carbon sugar represented by the formula C6H12O6

48. ## Chemistry

The rate constant for the reaction 2A → B is 7.63 × 10−3 s−1 at 110°C. The reaction is first order in A. How long (in seconds) will it take for [A] to decrease from 1.17 M to 0.590 M?

49. ## Chemistry

A volume of 57 mL of 0.040 M NaF is mixed with 19 mL of 0.10 M Sr(NO3)2. Calculate the concentrations of the following ions in the final solution.(Ksp for SrF2 2.0 × 10−10) [NO3−] M [Na+] M [Sr2+] M [F−] M

50. ## Chemistry

A solution is made by mixing exactly 500 mL of 0.124 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentration of the species below. Ka of CH3COOH is 1.8 × 10−5 [H+] × 10 Enter your answer in scientific notation. [OH−]

51. ## Math

What is the area between z=0 and z=2.95

52. ## Math

Natalie had some marbles. She gave 1/3 of them to her brother, who kept 12 marbles for himself and gave the rest to 5 friends. If each friend received 7 marbles, how many marbles did Natalie have at first? solve

53. ## GRE Question

the average of 937, 762 and 941 is what percent of their sum?

54. ## algebra word problem

One year, Shannon made \$288 from two investments. \$1100 was invested at one yearly rate and 1800 at a rate that was 1.5% higher. Find the two rates of interest

55. ## algebra word problem

One year, Shannon made \$288 from two investments. \$1100 was invested at one yearly rate and 1800 at a rate that was higher. Find the two rates of interest.

56. ## Math

How can you use the doubling strategy for 7x3

57. ## chemistry

In assessing 20.0ml of NaOH 0.175M , calculate how many ml of 0.200M HCl must be added to obtain a pH of 12.55

58. ## Math

Rachel gave 1/4 of a pie to each of 5 friends how many pies did she give to her friends in all

59. ## Chemistry

Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need

60. ## Biology

Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need

61. ## Math

The function rule n=0.69p relates the population "p" and the number of "n" these people who used the internet. The number of people who used the internet was 202 million. What was the population? I am so confused, please help me with atleast the first

62. ## Math

Pat and Kelly went hiking in the mountains. They started at 9,100 ft. They climbed 1,200 ft the first day, descended 900 ft the second day, and climbed 1,000 ft the third day. On the fourth day they descended 800 ft. What was the average altitude at which

63. ## math algebra

Find the equation in slope-intercept form of the line having m = -2 and b = 4.

64. ## math

Find an equation in standard form of the line passing through the points (8, -5) and (-6, 2).

65. ## science

A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem

66. ## science

A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two

67. ## science

which of the following would help decrease the human ecological footprint? A.using bottled water instead of tap water B.using public transportation instead of riding in a car C.buying books instead of borrowing from the library D.using hot water instead of

68. ## physics

A car traveling at 3.2 m/s accelerates at the rate of +0.68 m/s2 for an interval of 8.0 s. Find vf.

69. ## Calculus

You are creating a rectangular garden and want to surround it with brick edging. You also are going to divide it into two halves with the edging so that your vegetables and herbs are on one side and flowers are on the other. You only have 120 ft worth of

70. ## math

longest multipcation combination for 120 180 and 210

71. ## Math

Solve 3cosx+1=2secx

72. ## Math

Find product and write answer in scientific notation (3 x 10^6). * (2 * 10^12) I got .6 x 10 ^19 Is this right?

73. ## Math 10

A water sprinkler sprays in a circular a distance of 10 ft. What is the circumference of the spray? I got 31.4 ft. Is that right??

74. ## Math 5

A rectangular yard is twice as long as wide the perimeter is 120ft. What are the yards dimensions? W : L : I got. W : 10. And ll: 50 Is that right ?

75. ## Math 4

Karen is buying wallpaper border for her bedroom Which is 12ft by 13ft. If the border is sold in rolls of 5yards each how many rolls will she need to purchase? 156ft. Divide by 3 is total 52 yrds. So divide by 5 yd 10 for 50 yard.karen would need at 11

76. ## Math 8

A rectangular field is to be fenced completely. The width is 28yd. And the total area is is 1960ydsquared. What is the length of the field ? I got: 70 yd Is that right?

77. ## Math quest3

The formula for the surface area of a sphere is 4(3.14)r^2. What is the surface area of a ball with a diameter of 6 inches round? Round to nearest inch. I got. 113.04 Rounded is 113 inch

78. ## Math quest 2

If a triangular sail has a vertical height of 83 ft. And horizontal length of 40 ft, what is the area of the sail? I got area : 3,320ft squared

79. ## math

During the dinner rush, a certain restaurant cooks about 25 pounds of spaghetti per hour. How many grams of spaghetti do they cook per second?

80. ## Math - Discounts

A tv is advertised as 20% discount. If the original price is 450.00 what is the new price? Help please

81. ## Math

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

82. ## Math word problem

Ryan collected 43 candy bars on Halloween he gave 15 of them to his father andhe gave his mother ten less candy bars than he gave his father. Then Ryan ate 4 of the candy bars . Hwo many Andy bars does he have left ? I got 19

83. ## physics

A pelican flying along a horizontal path drops a fish from a height of 4.7 m. The fish travels 7.7 m horizontally before it hits the water below. What was the pelican’s initial speed? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

84. ## Word problem math

Word problem. You cut a 2 m long board into 2 pieces . One piece is 10 cm shorter than the other. How long are each boards.? I got. 1 pc at 80!cm. the other 1pc at 100 cm Is this right ?

85. ## Algebra inequality

I have to choose a variable and write inequality For less than or equal to I'm using these keys

86. ## algebra

X-5/3 =1 Or X - 5 = 1 ______ 3 I'm trying to type and tell you it's x-5 over 3 equals 1 I don't know how to do I think I have to do reverse operation which is multiply

87. ## ALGebra

Can you check 2x + 3 (x-2) -3 (x-6) I got 2x+3x-6 -3x+18 2x+3x-3x= 2x -6+18 =12 Final answer : 2x+ 12

88. ## Algebra pls check

Is this right ? -2(w-30) =-6w -2w -60 = -6 w +2w =+2w -60 = -4w _____________ -4 = -4 15 = w

89. ## Algebra. .

Can you check 2/3 k = 60 I got:: 3 2 k = 60 * 3 = 90 ________________ 2 3 1 2 = 2 K = 90/2 K = 45

90. ## math repost

name two numbers with decimal hundredth that round to the same whole number but different tenths.

91. ## math 5

name two numbers with decimal hundredth that round to the same whole number but different tenths.

92. ## math

name two numbers with decimal hundredth that round to the same whole number but different tenths.

93. ## social studies

what happenswhen its time to launch the hot air balloon

94. ## Algebra can u help

Word problem. You buy 6 lb turkey 3 lb coleslaw 4 lb cheese 4 lb turkey 2 lb coleslaw 3 lb cheese. Define and use variables to represent total cost I got.; 6 t + 3t + 4c + 4t +2s + 3c * x Is this right ??

95. ## Algebra

Can you check 2z - 3y -8z + y I got : 2z-8z-3y +y = -6z -4y =. -2y

96. ## Math. Algebra

3+2(4)-3+4(-3)= I got 4 3+4-2-5+3-6-8= I got -17 4-3(2+6) = I got. -21 10/5 + 8+(-3) /5 -4= I got -1

97. ## Soc studies declaration of independence

Can you help what rights cannot be denied? Would it be pursuit of life,libert, pursuit of happiness?

98. ## Algebra

2 * 7 - 10 / 9 - 4 = I got 7. Is that ok?

99. ## physics

What is the radius of a communications satellite’s orbital path that is in a uniform circular orbit around Earth and has a period of exactly 24.0 hours (86,400 seconds). (Measurement is from the center of Earth.) G = 6.67 × 10-11 N.m2/kg2 ME = 5.98 ×