# Questions Asked onMarch 20, 2014

1. ## Trigonometry

Let (7,-3) be a point on the terminal side of theta. Find the exact values of cos of theta, sec of theta and cot of theta?

2. ## Science

1-Which of the following is not a function of the circulatory system? D-fights infection 2-Which of the following explains why the heart is organized so that it pumps blood to two different locations? D-to provide a way for blood to pick up nutrients at

3. ## Math - PreCalc (12th Grade)

Which combination of limit properties is required to evaluate this limit? lim x->((24/x)-2x+2)^3 A) sum, difference, product, root B) sum, difference, product, power C) sum, difference, quotient, power D) sum, difference, quotient, root E) A limit does not

which three-dimensional figure has all triangular faces? A. triangular prism B. triangular pyramid***i pick B.*** C. rectangular pyramid D. cone

5. ## statistics

From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 8 passengers are randomly selected, find the probability that fewer than 7 of them show up.

6. ## Payroll Accounting

Julie Whiteweiler made \$930 this week. Only social security (fully taxable) and federal income taxes attach to her pay. Whiteweiler contributes \$100 each week to her company's 401(k) plan and has \$25 put into her health savings account (nonqualified) each

7. ## Chemistry

HClO(aq) + H2O (l) H3O+ (aq) + ClO-(aq) Calculate the value of ΔGrxn at 25 °C for hypochlorous acid when [ClO-]=[H3O+]=5.69x10^-5 M [HClO] = 1.340 M Previously calculated a ΔGºrxn of 42.20 kJ/mol Q = [5.69x10^-5] / [1.340] = .00004245 M equation used:

8. ## Physics

The diameter of the base of a tapered drinking cup is 6.6cm . The diameter of its mouth is 9.8cm . The path of the cup curves when you roll it on the top of a table. How much faster does the mouth move than the base? Express your answer using two

9. ## Child Development

Which of the following is TRUE regarding myelination? A) myelination begins prenatally and continues for years after birth. B) Myelination helps nerve impulses travel faster. C) The myelin sheath insulates the nerve cell. D All of these. I think the answer

10. ## math 8th

1. The following circle graph was published in the Cane County annual report. If there are 1,000 registered voters in Cane County, how many are 35–45 years old? circle graph (1 point) 150 voters

11. ## Physics

A solenoid is formed by winding 25.3 m of insulated silver wire around a hollow cylinder. The turns are wound as closely as possible without overlapping, and the insulating coat on the wire is negligibly thin. When the solenoid is connected to an ideal (no

12. ## Math HELP!! Who can solve??

I'm totally confused on these? Which is D = 2zv solved for v? A. v= 2z / D B. V= d / 2z c. V = D - 2z D. V=D / Z Which is Q = 200P/L solved for P? A. P= QL/200 B. P=200L/Q C. P=200QL D. P=200/QL

13. ## Biology

How do the kidneys clean the blood? (1 point) • Kidneys clean the blood by breaking down nutrients. • Kidneys clean the blood by filtering it to remove wastes. • Kidneys clean the blood by absorbing nutrients. • Kidneys clean the blood by

14. ## biology

Can you give me a long list of smelly animals

15. ## TO: DrBob222 science

1. Write the chemical formula for each of the following acids: a.) hydrocyanic acid b.) oxalic acid c.) chlorous acid d.) nitric acid 2. Write the acid name or chemical formula for each of the following: a.) HBr b.) sulfurous acid c.) HClO4 D.) phosphoric

16. ## geomary

in sunlight, a vertical stick 7 ft tall casts a shadow 3 ft long. At the same time a nearby tree casts a shadow 11 ft long. How tall is the tree?Round to the nearest tenth.

17. ## Language arts help!!

1–6, read the play excerpt below and answer the questions that follow. Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and

18. ## Science

How many minutes are required for a radio signal to travel for Earth to a space station in Mars if the planet Mars is 7.83 x 10 to the 7th km from Earth?

19. ## College math

A and B agree to share the cost of an \$18 pizza based on how much each would eat. B ate 3/2 of the pizza that A ate. How much should A and B each pay? A= B= Thank you

20. ## solid mensuration

let a and b be opposite vertices of a unit cube (i.e. , the distance between a and b is the square root of 3). find the radius of a sphere, whose center is in the interior of the cube, that is tangent to the three faces that at a and also tangent to the

21. ## english

Select the sentence in which all pronouns are used correctly. A. I sat between him and her during the sales conference. B. Just between you and I, I am not impressed by our new manager. C. Be sure to divide all income from the suburban property between he

22. ## chemistry

Calculate the percent yield for an experiment in which 46.9 g of SO3 was produced upon the reaction of 51.2 g of SO2 with 25.0 g O2

23. ## Biochemisty

The DNA alpha-helix structure has 566900 complete turns. The average molar mass of one base pair of nucleotides in DNA is approximately 469 g/mol. If the spacing between successive base pairs is about 0.69 nm, and a complete turn in the helical structure

24. ## Physics

How much heat is required to completely boil away 0.200 kg of water (Hv = 2.26 × 10^3 kJ/kg)? (Points : 1) 4.52 × 102 kJ 2.26 × 103 kJ 4.52 × 103 kJ 1.13 × 104 kJ

25. ## Math - PreCalc (12th Grade)

What value must be defined for f(4) to remove the discontinuity of this function at x=4? f(x)=(x^2−16)/(x−4) A) 0 B) 4 C) -4 D) 8 E) -8 f(4)=(4^2−16)/(4−4) f(4)=0/0 you can't divide by zero. I don't understand the question.

26. ## CHEMISTRY

CaCO3(s)+2HCl(aq)>CaCl2(aq)+H2O(l)+CO2(g) how many grams of calcium chloride will be produced when 30 g of calcium carbonate are combined with 13 g of hydrochloric acid? Which reactant is in excess and how many grams of this reactant will remain after the

27. ## Math

According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their sleep in the last

28. ## Psychology

Can someone reword this for me? I am having problems comprehending the question. The question is: If psychological needs have presumptive brain or physiological correlates, are they still psychological needs?

29. ## calculus

Evaluate the improper integral or state that it diverges: integral from 6 to infinity (1/t^2-5t)dt. I need help on solving this and what does it mean by converges and diverges?

30. ## ROCKS :D just want to make sure.

knowing nothing else, what could the relative age of two rocks tell you about them? one rock is 10,000 years old, and the other is 8,000 years old. one rock is older than the other they both have fossils in them one rock is closer to the surface than the

31. ## Math

Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152 answer: 30th percentile = 113 90th percentile = 200 thank you.

32. ## statistic

6. Which of the following represents the sample space for rolling a six-sided die and tossing a coin? (1 point) {1H, 2H, 3H, 4H, 5H, 6H, 1T, 2T, 3T, 4T, 5T, 6T} *{1, 2, 3, 4, 5, 6} {H, T} {1, 2, 3, 4, 5, 6, H, T}

33. ## Statistics

1. A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows: Eating Habits Scores Baseball Players Football Players Basketball

Find the values of the 30th and 90th percentiles of the data. 129, 113, 200, 100, 105, 132, 100, 176, 146, 152 answer: 30th percentile = 113 90th percentile = 200 thank you

35. ## chemistry

A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 853mmHg ?

36. ## physics

A box of mass 5.0 kg starting from rest slides down a 1.8 m long ramp inclined at an angle of 22.0 deg. from the horizontal. If the ramp is frictionless, how long will it take the box, starting from rest, to reach the bottom of the ramp? if the

37. ## Multiple Choice HELP!

What is a counterexample for the conjecture? Conjecture: The product of two positive numbers is greater than the sum of the two numbers. A. 3 and 5 B. 2 and 2 C. A counterexample exists, but it is not shown above. D. There is no counterexample. The

NEED SOMEONE TO RECHECK ANS *****HELP PLEASE HAS STAR BY MY ANSWER If P (A) = 0.2 and P (B) = 0.3 and A and B are disjoint, what is P (A or B)? (1 point) 0.00 0.06 0.10 0.44 *0.50 4. Given that you roll a fair six-sided die, what is the probability that

39. ## Chemistry

The mechanism for NH2NO2=N2O+H2O occurs in three steps: step 1: NH2NO2=NHNO2- + H+ (forward and reverse reactions are fast) step 2: NHNO2-=N2O+OH- (slow) step 3: H+ + OH-=H20 (very fast) What is the rate law for d[N2O]/dt as determined by the mechanism?

40. ## Language Art (Please Check)

1.A 5.The word evacuate comes from the Latin root vac which means to empty. What word that contains this root means not occupied? A. vacuum B. vacation C. vacant D. evacuee

41. ## Algebra 1

Hi! I'm doing my math homework, but I got confused. Can someone please help me how to solve simplest radical forms with an example? With square roots?

42. ## chemistry

Cabbage Juice Titration Lab connexus

43. ## SCIENCE

1. Multiple choice: why is it uncommon to draw lewis diagrams for ionic compounds? A.) Lewis diagrams can only illustrate covalent bonding B.) ionic compounds cannot be represented by Lewis diagrams C.) ionic compounds involve electron transfer not

44. ## Math

The names, or notes, of all the white keys on a piano are written on pieces of paper and placed in a cup. There are 7 sets of the notes D, E, F, and G and 8 sets of the notes A, B,and C. If a person draws one note out of the cup without looking, what are

45. ## physics

I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

46. ## Chemistry

A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium.What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 8.9atm ?

47. ## TO DrBob222 Science

1. with respect to ion count, why is water considered to be neutral? 2. How do the number of H+ and OH- ions compare after a.) HI is added to water? b.)KBr is added to water? c.)KOH is added to water? 3. Give the Arrhenius definitions for salts. Thanks :)

48. ## physics

If the average time from one on state to the next one on the first photogate is 0.005 seconds, what is the speed of the cart at this point (LEAVE OUT the units of m/s)?

49. ## Calculus Help STEVE

find y'' by implicit differentiation. 2x^3 + 3y^3 = 8 I got the first derivative as you but the problem was asking for second derivative by implicit diff. this is where i got confused. Thank you!!!

50. ## physics

If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?

51. ## Physics

If a piano tuner hears 3 beats each second when listening to a 8 Hz tuning fork and a single string on the piano which is of higher frequency.. What is the frequency of the single string from the piano?

52. ## Math - PreCalc (12th Grade)

Which statement is true for any linear system of two equations in two variables? A) The system is independent if the slopes of the two lines are equal. B) The system is inconsistent if the y-intercepts of the two lines are equal. C) The system is

53. ## physics

Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80.What is the magnitude of the friction force on the filing cabinet?

which word or words correctly completes the sentence? A ________ Has five faces,vertices,and eight edges. A.triangular pyramid***i pick A.) B.cube C.pentagonal pyramid D.rectrangular pyramid

55. ## twh

Isaiah walks 3 miles due north, turns and then 5 miles due east. How far is he from his starting point?

3-log(x+2)=5

58. ## Physical Science

A 60 W light bulb at 120 V is left on in your house to prevent burglary, and the power charges 10 cents per kilowatt-hour, how much will it cost to leave the bulb on for 30 days?

59. ## MATH HELP

In desperate need of help! solve by factoring. 1. x^2=-25+10x 2. 2x^2+9x=5 3. The length of a square is 4x-3. Find the area in terms of x.

find the derivative of the function. Simplify where possible. F(theta)=arcsin(square root of (sin9(theta)))

61. ## Child Development

Recognizing the decreasing volume in the sound of a car engine goes with the sight of a car moving away rather than moving toward you is an example of _______ perception. A) Direct B) Depth C) Intermodal D) Constructivist Is it C

62. ## Calculus

Evaluate the improper integral or state that it diverges: integral from -inf to inf (2xe^-x) dx. Please help!

63. ## Physics

A 60 W light bulb at 120 V is left on in your house to prevent burglary, and the power charges 10 cents per kilowatt-hour, how much will it cost to leave the bulb on for 30 days? Please show how to work this

64. ## Chemisty

a)What is the [Ca2+] when 100mL of .05M CaCl2 is added to 100mL of .10M K2SO4? b) What is the [SO42-] for part a? c) write the Ksp expression for CaSO4 d)Will a precipitate form in the solution from part a)?

65. ## Math HELP!!!!!!!!

A superhero is trying to leap over a tall building. The function f(x)=-16x^2+200x gives the superheroes height in feet as a function of time. The building is 612 feet high. Will the superhero make it over the building? Explain.

66. ## algebra

if 6 notebooks + 2 binders = 23.52 ans 3 notebooks + 4 binders = 25.53 how do I solve to find out what the notebooks and binders each cost?

Crossing over (genetic recombination) and independent assortment result in A.) genetic variation in the gametes B.) four identical gametes C.) two diploid cells D.) a very large number of mutations

68. ## math

Jorge sees that there are small and large squares in the tile design belo.how many squares are there in all in the design?

69. ## Science

1. What is the momentum of a 20.0kg scooter traveling at 5.00 m/s?

70. ## math

Ms. M is buying a 6 pound roast at \$1.05 a pound. What will her change be from a ten dollar bill?

71. ## math

Mr. Willams receives an annual salary of \$54,000. What is his average monthly salary?

72. ## Science

5. Which of the following types of pollution cannot be attributed to car and truck emissions? A. acid rain B. sedimentation C. ozone D. photochemical smog 6. Which of the following is a source of photochemical smog? A. fossil fuels B. wind energy C.

73. ## math

What will be the cost of 275 bags of sugar containing 98 pounds each at \$0.12 a pound?

74. ## TO: DrBob222 science help

1. with respect to ion count, why is water considered to be neutral? 2. How do the number of H+ and OH- ions compare after a.) HI is added to water? b.)KBr is added to water? c.)KOH is added to water? 3. Give the Arrhenius definitions for salts.

75. ## Language Art (Please Check)

1.C But mama told me never mind.She said i didn't need a bracelet to remember laurie,just as i didn't need anything to remember pap or our home in berkeley or all the people and things we loved and had left behind What is the main idea of this passage? A.

76. ## Math

1. You want to deliver an article with the most impact and easy reading to the readers; you decide that you need to present the data as percentages. For each of the data statements, though, none of them have percent’s. Convert each statement’s data

television is an attractive advertising medium because it A. Offers mass coverage and flexibility B. is relatively expensive C. offers rapidly growing network audience D. provides instant feedback which can be used to measure effectiveness

78. ## math

x=2+y y/2=-3+x

79. ## Math

Type Amount Recycled (%) Amount Recycled (in millions of tons) Paper and Paperboard 52.8 45.9 Yard Trimmings 22.2 19.3 Metals 8.6 7.5 Glass 3.7 3.2 Plastics 3.1 2.7 Wood 2.7 2.3 Food waste 1.6 1.4 Other 5.3 4.6 Date US Population Jul 1, 2012 313.85 million

80. ## math 1 question pls help!!!!!

7. A rectangular prism has a width of 92 ft and a volume of 240 ft3. Find the volume of a similar prism with a width of 46 ft. Round to the nearest tenth, if necessary. (1 point) 30 ft3 40 ft3 60 ft3 120 ft3*** this one was tricky pls help asap!!! thanx in

81. ## CHEMISTRY

An electron undergoes a transition from an n=3 to an n=1 stationary state and red light is released. Which of the following forms of electromagnetic radiation could be released for an n=2 to n=1 electron transition within the same atom? -blue visible light

82. ## math

Let f:ℤ+ → ℤ+ be the function defined by: for each x ∈ ℤ+, f(x) is the number of positive divisors of x. - find integers m, n, nd k so tha f(m)=3, f(n) = 4 anf f(k) = 5 -is f one-to one? Explain, is f unto? prove is it true that all positive odd

83. ## Calc Help :(((((

find y' and y'' y = ln(x+(square root of (9+x^2))

84. ## math

Students have to choose one to five topping for their sundaes chocolate syrup,peanuts,whipped crime, sprinkles, and cherries. Assuming all toppings are equality likely to be chosen, what is the probability that a student chooses a Sunday with peanuts only?

85. ## Calculus Help

find y'' by implicit differentiation. 2x^3 + 3y^3 = 8

86. ## CS programing

Storage: .data 2 0 ; storage for n22 .data 2 0 ; temp storage 23 .data 2 2 ; constant 2 24 .data 2 2 ; const 2 25 0 10 ;const 10 26 please can u show me the correct way to declare a constant using wombat.(CPU sim).

87. ## Astronomy

Why are there multiple lenses cemented together to form the objective lens and the eyepiece lens?

88. ## Language Art (Please Check)

8.C 8.Which of the following details supports the main idea that Pa worked hard to try to feed his family? A.Pa and I walked, because I was a big boy of eleven. B.Were prid near out of grub my father told her. C.He traveled twice as far each day as the

What are the 4 key criteria in supplier selection? I think I maybe looking in the wrong section of my book so I'd just like to know what the 4 are so I can find them. Thank you.

90. ## Sportsmanship

Would hitting a badminton racquet on the ground be an example of bad sportsmanship?

91. ## Math

What is 3/8=4m-2 over _____ 12

92. ## math

proctor exam mat106

93. ## math

Date US Population Jul 1, 2012 313.85 million Jul 1, 2011 311.59 million Jul 1, 2010 309.35 million Jul 1, 2009 306.77 million Jul 1, 2008 304.09 million Jul 1, 2007 301.23 million Jul 1, 2006 298.38 million Jul 1, 2005 295.52 million Jul 1, 2004 292.81

94. ## AED

As we analyze Western thought vs. Eastern thought, we also should take a look at the application of each school of thought is applied. Lets say that American schools reform to include eastern philosophy in its curriculum. What steps would have to occur to

95. ## CHEMISTRY

I need to find the rate law of a reaction but ive only done so when factors cancel out, this one has all different numbers and im not quite sure what to do with it. It has time taken every second (which im assuming are the different trials) and different

96. ## math

Suppose that you took out a loan at 7% interest for 192 days. If the amount of interest was \$149.33, use the ordinary interest method to find the amount of principal you borrowed. Round to the nearest whole dollar amount. \$

97. ## math

From the following information, determine the maturity date of the loan. Enter the full name of the month. (E.g., March) Loan Date Time of Loan (days) Maturity Date February 5 110

98. ## Math

4. Your article will be featured on the front page of the World section of the newspaper, as well as on-line. The article is to be placed in the shaded section below, which measures 4 inches wide by 9 inches long (not drawn to scale). Your editor has

99. ## math

express 8 divided by 12 as a frction

100. ## algebra

y/4=15/20 how do I solve the proportion? please explain it to me. I have several to do

101. ## Physics

An electromagnetic wave has a frequency of 2.04 x 10^12 Hz, What is the wavelength of this EM wave?

102. ## Algebra

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 4) The cheerleading squad is

asked by Help me?? 3 questions
103. ## Math

An architect has allocated a rectanglular space of 646ft^2 for a square dining room and a 15ft wide kitchen. Find both the width of the square dining room and the length of the entire rectangular space.

104. ## math

If the rectangle is 53 cm on one side and the other side is 29 cm what is the perimeter of the rectangle.

105. ## Math

How do graph the parent quadratic function on calculator? I need some assistance so I can start my Hw. I have a TI-83 pus calculator

106. ## Math

Find an Equation for the least squares line then use it to find the missing value. (400, 50) (500, 65) (500, 70) (600, 80) (700, 85) (800, 95) (550, Y) Interpolate I think the least squares line is y= .10538X+ 12.6923 Could someone verify and please

107. ## Math

The base of a triangle is 6cm greater than the height. The area is 20cm^2. Find the height and the length of the base.

108. ## geometry

Marta is standing 4ft. Behind a fence 6 inches tall. When she looks over the fence, she can just. See the top of a building. She knows that the building is 32 ft. 6 inches behind the fence. Her eyes are 5 ft. From the ground. How tall is the building?

According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their sleep in the last

110. ## Math ~ Check Answers ~ASAP

3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb,

111. ## TECH

A HYDRAULIC LIFT OFFICE CHAIR HAS ITS SEAT ATTACHED TO A PISTON WITH AN AREA OF 11.2CM2. THE CHAIR IS RAISED BY EXERTING FORCE ON ANOTHER PISTON, WITH AN AREA OF 4.12CM2. IF A PERSON SITTING ON THE CHAIR EXERTS A DOWNWARD FORCE OF 219 N, WHAT FORCE NEEDS

112. ## vocabulary

jorge and louise both want to be friends agains, but somehow their sincere effort have been ( Stalemated, wilted) ans - stalemated

113. ## language arts

Resilient people usually a. complain when they have bad luck b. bring good luck to others c. are able to deal with setback

114. ## math

the area of the curved surface of D battery witha diameter of 3.2 centimeteres and a height of 5.6 Centimeters

115. ## vocabulary

after world war II the us was not (vindictive/lax) toward its former enemies but tried to help them recover and rebuild vindictive

116. ## vocabulary

contract talks have been stalled for weeks and nothing either side has suggested can't seem to break the dialogue/stalemated ans. dialoge

117. ## math

show me from least to greatest 6/11, 2/3, 4/7, 9/10, 15/22, 1/4, 2/5, 7/9, 1/6, 5/8

118. ## Physics

A Green light wave is traveling a rate of 3*10^8 m/s and a wavelength of 561 m. How fast would a red wave with a wavelength of 447m travel?

119. ## Math ~ Check Answers ~

3. In the following list of data, find the range: 21, 28, 31, 35, 39, 43, 51, 60. 35 37 39****** 40 Pat recorded the weights of the first 10 fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb,

120. ## math

The area of a rectangular space is 128 square feet. a. Find all the possible pairs of whole number dimensions in feet. b. Explain which pair allows enough space for a car to park. c. If the length of the space is x feet, how would you describ e the width

121. ## Chemistry

The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.

122. ## ama

a ladder of 10 ft long leans against a vertical wall. the upper end slips down the wall at 5 ft/sec. how fast is the ladder turning when it takes an angle of 30 degree with the ground?

123. ## Math

Andrew is half as old as Jessica. Which equation represents the sum of Andrew's and Jessica’s ages if their ages total 12? How do I find the equation?

124. ## Math question check

find the surface area of a square pyramind with a base length of 24cm and a height of 16cm . . . . . . . . A.1056 cm^2 . . . . . . . . . . B.1536 cm^2 . . . . . . . . . . C.816 cm^2 . . . . . . . . . . D.1344 cm^2(I PICKED THIS ONE)

125. ## history

who wrote the song bobby magee. who sang the origional version of this song. In what year did the song become popular

126. ## chemistry

The pressure in an automobile tire is 1.85 atm at 27.0°C. What will be the pressure if the temperature increases to 38.0°C?

127. ## math question (CHECK)

find the surface area of a square pyramind with a base length of 24cm and a height of 16cm . . . . . . . . A.1056 cm^2 . . . . . . . . . . B.1536 cm^2 . . . . . . . . . . C.816 cm^2 . . . . . . . . . . D.1344 cm^2(I CHOOSE THIS ONE)

128. ## geometry

Three points are chosen uniformly at random from the perimeter of circle. The probability that the triangle formed by these is acute can be expressed as a/b where a and b are co prime positive integers. What is the value of a+b?

129. ## Math help understand

Have world problem and I don't get it please explain step by step simplify and show me as many ways as possible cause one might be easier than other !! A bicycle travels at constant speed of 15km/hr. Bus starts 195km behind bicycle and catches up to

130. ## English

I almost cried with joy. ------------------------- Does 'cry' mean 'weep' or 'shout' in the sentence?

131. ## English

1. Finally I could decide on my future job. 2. Finally I could decide my future job. ------------------------------------------ Do we have to put 'on' after 'decide' or not?

132. ## anonymous

is there any apprenticeship programs for a sculpture?

133. ## research

Explain why actuarial prediction of sex offense recidivism is considered important.

134. ## chemistry

if you had 0.028 moles of copper sulfide, how many grams would you have?

135. ## Physics

A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal. Find the magnitude of the applied force F. what is the magnitude of the normal force between the ramp and the

136. ## English

1. It is noisy outside. 2. It is too noisy and we can hardly hear each other. 3. It is too noisy for the man to sleep. 4. There must be a fight going on outside. It is way too noisy. 5. Anything doing? Why is it so noisy? 6. It is too ugly and too noisy.

137. ## HELP SCIENCE

what is H2PO4 and what type of bonding is it?

138. ## CORE MATHS

The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ascending powers of x., are 2 and 90x^2 Given that a is less than b find the values of the constants a and b . (11 marks) Thanks :)

139. ## english

Which synonym of the word look would be most effective in the following sentence? Detective Flint leaned forward with narrowed eyes to _______ what appeared to be a vital clue. A. survey B. scrutinize C. view D. ogle I think it would be B.

140. ## Science

How do you calculate the preparation of 0.1M HCl using 33% HCl?

141. ## physics

Explain why voltage is constant when connecting resistance in series

142. ## physics

Explain why voltage doesn't change when connecting resistance in series

143. ## English

1. We are now arriving at Incheon International Airport. 2. We are now arriving in Incheon International Airport. 3. I met one of my friends at the airport. 4. I met one of my friends in the airport. -------------------------- Which preposition do we have

144. ## MATHS

WHAT IS 32X14+_=689

145. ## History

During the cold war, people were afraid of communists, both outside and inside the United States. The red scare and mccarthyism that grew out of these fears was damaging to the American way of life. During the mccarthy years, many of the freedoms

146. ## Physics

Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg. to the horizontal. The cofficient of kinetic friction between the lighter block and the plane is 0.15 and that between

147. ## History8

George Washington enjoy the comforts of home at Valley Forge. I guess what im asking is Im confused, was Valley forge a comfort to G.W. and his men? thankies all, love ya peace

148. ## Phyics

A box of mass 14.0 kg sits on a horizontal steel ramp 4.8 m long with a coefficient of static friction of 0.40 between the ramp and the box. The end of the ramp is slowly lifted until the box begins to slide down the ramp. What angle does the ramp make

149. ## History8

How did the Battle of Saratoga mark a turning point in the war? a.It forced Burgoyne to retreat to Albany, New York, where American forces would launch a surprise attack. b.It convinced colonists that the French had aided British forces, so they could not

150. ## Science

If the density of a steel hammer 7gm/cm on earth what would the density be on a spaceship?

151. ## Physics

A box of sand (initially at rest) is pulled along a horizontal floor by a cable with a breaking strength of 1090.0 N. The coefficient of static friction between the box and the ground is 0.28. What should the angle between the cable and the floor be in

152. ## Canvas art

Who paints using the name Cabot

153. ## discrete math

Let f:ℤ+ → ℤ+ be the function defined by: for each x ∈ ℤ+, f(x) is the number of positive divisors of x. - find integers m, n, nd k so tha f(m)=3, f(n) = 4 anf f(k) = 5 -is f one-to one? Explain, is f unto? prove is it true that all positive odd

154. ## Canvas art

Who paints using the name Cobot

155. ## Physics

If you have three waves corresponding to to the lowest three frequencies of vibrations of a 30 cm air column, what is the wavelength of the standing wave in each case? What frequency is heard in each pipe? The only information I have is that the speed of

156. ## Physics

Two boxes of mass 7.40 and 7.00 kg are in contact and are accelerated across a horizontal surface by an force of 51.49 N applied parallel to the surface and pushing on the lighter box. The magnitude of the frictional force between the surface and the

find the volume of a square pyramid with a base length of 9cm and a height of 4cm. ANSWER: 108 cm^3 (is it right?)

158. ## grammar check? idk

does this make sense? Fertilizers are combinations of nutrients that plants need to grow. The primary nutrients of fertilizers are three different elements which are nitrogen, phosphorus, and potassium. These elements are often combined into a NPK blend.

I'm trying to write a program for this piece wise function using CPU sim.its really argent... f(n) = n^5 (n0) i have worte this program bust still give error on cpu simulator.. please can you help me correct this error. Start: read 0 ; read n store 42 ;

160. ## social studies

1. What was Teotihuacan ?? 2.How was Aztec society organized ?? 3.Why and how did the Aztecs sacrifice to the sun god ??

161. ## physics

If a cart is initially travelling at 3.5 m/s, and has a mass of 200g, what is it's kinetic energy (LEAVE OUT units of J)?

What is 2 to the 2nd power

163. ## physics

if the cart in the last question collides INELASTICALLY with a stationary cart of mass 150 g, what is the kinetic energy of the carts after the collision (LEAVE OUT units of J)?

164. ## physics

What is the momentum of the 200 g cart BEFORE the collision (LEAVE OUT units of kgm/s)? please help.

165. ## History8

In general, how did the Revolutionary War change attitudes among women?

166. ## Chemistry

If your Copper(II)sulfate solution contains 0.8 grams of Cu and you recovered 0.76 grams of it, what would be the percent yield?

167. ## Criminal investigation

I read an article on an informant killed by a gang leader. What motivates informants to do a job like that? Thanks

168. ## MATHS

walking at 3/4 of his usual speed, a man is late by 2.5 hrs. What is he usual time?

169. ## Chemistry

A sample of C60O3 decomposes with an activation energy of 50 kg/mol, an Arrehnius pre-factor of 2e10 s-1 and a k value of .04 s-1. How long does it take for a 25 mg sample at 25 degrees C to produce 10 mg.

170. ## physics

If the electron experiences a force of 5.6 x 10-6 N, how large is the field between the deflection plates?

171. ## math

solve 15-18+n and 18+5+N

172. ## Math

Nina walked 15 yards to Paul's house. They then went hiking. Which rule shows how many yards Nina walks for every yard Paul walks? a. p=n+15 b. n=p+15 c. P=15-n d. n=p-15

173. ## Need math help please

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability.

174. ## Physics

A train blows its horn as it approaches a crossing. The train engineer observes a frequency of 118 Hz and a stationary observer observes a frequency of 122 Hz. What is the speed of the train? Use the speed of sound as 340m/sec

175. ## Math economics HELP!!!

Can someone please help me with a hint to solve this problem?? I'm struggling really hard with this. Thanks!!! "Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q^2. The aggregate demand in the

176. ## Need Math Help Please

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

177. ## world geography

What impact did the dissolution of the Union of Soviet Socialist Republics have?

178. ## Chemistry

500 ml of a buffer solution with ph=2.10 must be prepared using .4 M HNO2 and solid KNO2. The ka value of HNO2 is 4e-3. a.) What mass of KNO2 should be added to 3 L of the HNO2 to make the buffer? b.) What is the buffer's pH after 150 ml of .5 M HNO3 is

179. ## Physics

Ten cars at an intersection are blowing their horns simultaneously, creating a 98 decibel sound in the middle of the intersection. What is the average sound level for each car?

180. ## Math

Jack bought a sweater at the sale price of \$25. The original cost of the sweater was \$40. What percent represents the discount that he received when buying the sweater?

181. ## consumer mathematics

How many feet of fencing would be needed to enclose a yard that is 107 ft by 160 ft?

182. ## algebra 1

At Jack's Laundromat, 6 of the washers must be replaced. These washers represent of the total number of washers. If w represents the total number of washers, which equation could be used to determine the value of w?

183. ## logic-math

Write the reciprocal and the anti-reciprocal of: That a quadrilateral has 4 equal sides, is a necessary condition for that it is a square. That a triangle has 2 equal sides, is a necessary condition for that it is isosceles. Only if f is integrable in an I

184. ## logic-math

Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a

185. ## math

an instructor makes \$15 more per hour than an assistant is \$65 what is the hourly wage of the assistant ?

186. ## General Chemistry

A piston has an external pressure of 7.00 atm. How much work has been done in joules if the cylinder goes from a volume of 0.130 liters to 0.650 liters. Express your answer with the appropriate units.

187. ## Math - PreCalc (12th Grade)

If Sn represents the sum of the squares of the first n natural numbers, use proof by induction to find which of the following expressions for Sn is true? A) Sn = n(n − 1)/3 B) Sn = n(2n − 1)/3 C) Sn = n(n + 1)/3 D) Sn = n(n + 1)(2n + 1)/3

189. ## math

an instructor makes \$15 more per hour than an assistant. If the combined hourly wage of the instructor and assistant is \$65 , what is the hourly wage of the assistant?

190. ## Math Help

In desperate need of help! solve by factoring. 1. x^2=-25+10x 2. 2x^2+9x=5 3. The length of a square is 4x-3. Find the area in terms of x.

191. ## Math

How to tell how many solutions c^2 - 18 = 9 in mental math?

192. ## Science

In your own words, describe the mathematical process of converting from one metric unit of length to another.

193. ## math

estimate the value of 3268 x 7

194. ## physics

two vectors A and B each have magnitude 220 and angle BETWEEN THEM IS 120 WHAT WILL BE RESULTANT?

195. ## Science

What could be an "weapon" for the viral meningitis?

196. ## Maths

In covering distance, the speeds of A & B are in the ratio of 3:4.A takes 30min more than B to reach the destination. Find time taken by A to reach the destination?

197. ## Math check (:

find the volume of the cone with a radius of 6in. and a height of 11in. MY ANSWER: 415 in^3 (Is it right?) thank you in advance!

198. ## Language

What impact do ignorance and stigma have on people who are HIV-positive in Malawi and other African countries? It'll b much helpful if you don't give links Thank u :)

199. ## Physics

A 4700 kg vehicle on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the vehicle is 189 N backward: Determine the values of the other forces acting on the vehicle. Draw a free body diagram

200. ## Algebra

I'm asked to simplify these expressions by using long division. I've attempted these a few times and I'm very confused. Any help you can provide would be very much appreciated. 1. (72 - 8x^2 + 4x^3 - 36x) / (x - 3) 2. (8b^3 - 6) / (2b - 1) Thank you.

201. ## Math

estimate 4825 x 63

202. ## Computer

Home work:- Write a program to read 5 records consists of first name, last name, id and grade. Assign the grade according to the following specifications: 0

Crossing over (genetic recombination) and independent assortment result in A.) genetic variation in the gametes B.) four identical gametes C.) two diploid cells D.) a very large number of mutations

204. ## Math - PreCalc (12th Grade)

What is the slope of the tangent line passing through the point (2, 3) of the graph of this function? f(x)=x^2+2x−5 A) 1 B) 2 C) 3 D) 4 E) 6 f(2)=2^2+2(2)-5 f(2)=3 so is it c?

205. ## Science URGENT!!!

Mulitple choice: why is it uncommon to draw lewis diagrams for ionic compounds? A.) Lewis diagrams can only illustrate covalent bonding B.) ionic compounds cannot be represented by Lewis diagrams C.) ionic compounds involve electron transfer not electron

206. ## Physics

A direct current power supply is connected to a circuit containing one resistor, and 1.5 A is drawn. If a second identical resistor is connected to the power supply in parallel with the first, how much current is drawn from the battery?

207. ## math

estimate the value of a)4312 divided by 6 and b) 7134 divided by 82

208. ## math

the radius of a circle is 7n-21 inches. find the circunference of the circle in terms of N. Use 22/7 as an approximation for pi

209. ## Math - PreCalc (12th Grade)

If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1? A) (k(5k − 3)/2)+ 5k + 1 B) (k(5k − 3)/2)+ 5k − 4 C) (k(5k − 3)/2)+ 5k + 2 D) (k(5k − 3)/2)+ 5k − 3 E) (k(5k

210. ## Physics

A 10-ohm resistor is attached to a 20-ohm resistor in series. This combination is then attached to a 30-ohm resistor in parallel. This is then connected to a 120-V battery. What is the current drawn from the battery?

211. ## Physics

I don't understand this question... What is the change in entropy for a system that has 250 J of heat added to it at 25°C? (Points : 1) 10 J/K 0.84 J/K 0.84 J/K 10 J/K

212. ## Physics

When two resistors are connected in series across a 12-V battery, 1.1A flows. When they are connected in parallel across the same battery, 6.3A flows. What is the smaller resistor's value?

213. ## Math

A superhero is trying to leap over a tall building. The function f(x)=-16x^2+200x gives the superheroes height in feet as a function of time. The building is 612 feet high. Will the superhero make it over the building? Explain.

214. ## math

What is the product of (m^2-2m+7)(3m+6) please solve how u did it ??

215. ## Math Help

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

216. ## Math Help

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability. And please explain.

217. ## Microeconomics

Can someone help me with a hint to solve this problem?? Thanks!!! "Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q2. The aggregate demand in the market is given by 1000−p. Suppose that, in

A voltaic cell is constructed that uses the following reaction and operates at 298 K: 2 Al(s) + 3 Mn2+(aq) 2 Al3+(aq) + 3 Mn(s). What is the potential, E, of this cell when [Mn2+] = 0.10 M and [Al3+] = 1.5 M? Answer: The EMF of this cell under standard

219. ## english

Choose the sentence that has a subject complement. A. The day ended with many surprises. B. I felt much better. C. The nurse felt my pulse. D. We can't leave without seeing her. I think it's B.

220. ## Physics

Why is using mirrors to generate electricity not a common practice?

221. ## math

Mr. white, a carpenter, has worked 40 1/2 hours jn repairing a house. At \$23.60 an hour, how much has he earned?

222. ## math word problem

Need help setting this up! A corner store has 54 pieces of candy. The number of gumdrops is six less than two times the number of jawbreakers. The number of lollipops is four more than the number of jawbreakers. How many each type of candy?

223. ## math

I paid \$8.10 for a 6 pound roast. How much a pound did I pay?

write the oxidation and reduction half-reactions that occur at the anode and cathode, respectively, when MgCl2 liquid is electrolyzed using inert electrodes. HELP PLEASE!!!

225. ## Calculus :(

Differentiate with respect to (t). y = d cos(t) + (t^2)sin(t)

Find an equation of the tangent line to the curve at the given point. ((pi/6),(2 square root of (3)/3)) y = sec (x)

227. ## Physics

In a lightning bolt, a large amount of charge flows during a time of 2.2 10-3 s. Assume that the bolt can be treated as a long, straight line of current. At a perpendicular distance of 28 m from the bolt, a magnetic field of 7.3 10-5 T is measured. How

228. ## CALCULUS HELP

Let r(x)= f(g(h(x))), where h(1)=4, g(4)=5, h'(1)=3 , g'(4)=5 and f'(5)=7. find r'(1).

229. ## Language Art (Please Check)

3.A 4.D 3.Which of the following sentences contains a verb that agrees with its subject? A. The memories of her friend stay with her. B. Friends of the family helps them. C. Some people from the neighborhood gives them extra food. D. Sacks of mail is

230. ## math

William helped his father pack 1000 tomato plants. He put 25 plants in a box. They sold them for \$2.25 a box. How much did they receive for the plants?

1.B 2.C 1.A pet dog that was forsaken would most likely look A. aggressive B. dirty C .well-trained 2.A meal that is skimpy will likely leave a person feeling A. too full B. satisfied C. still hungry

232. ## math

Jeff is repairing his sleeping tent. After measuring he find he needs 90 inches of new canvas. What will it cost at \$1.88 a yard?

233. ## Physics

Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units. 1.9(2.8)^2 .. then divid by 2.3 I

234. ## research

where can I find information on actuarial prediction of sex offense recidivism and why it is important.

235. ## Physics

An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit