# Questions Asked onFebruary 14, 2017

1. ## Vectors - Maths

In triangle ABD, AC = CD = CB. Let AB = u and BC = v. Prove that DAB is a right angle triangle. AC is the midpoint of the assumed "right angle triangle" and is equidistant from the three vertices. Angle DAB is presumed to be 90. Pls help me with this proof

2. ## Math

Write an expression using an exponent to represent the area of a square with the side length of 13 inches

3. ## Vectors Q#2

Find the shortest distance between the point D with coordinates (-2,-2,9) and the line passing through the points with coordinates B(2,4,6) and C(4,1,5)

4. ## math

karyn purchased a square picture frame. each side measures 1 1/4 feet. what is the area of the picture frame in square feet?

25. ## Data

Bridget works part time in a shoe store. Sometimes when it is not busy, she rearranges the shoes for fun. If she takes six different pairs of shoes and rearranges them in a row, in how many ways can she rearrange them so that no two shoes match? Is the

26. ## history

which of the following best describes daily life in the south during the civil war? a.about the same as before the war because factories provided necessities b.difficult but tolerable because most people did not experience major changes c.better because

27. ## Physics

the funamental notes produced in an open and organ pipe and closed end organ pipe of same length are io ratio

28. ## Math

a u.s based motorcycle manufacturer says that it expects to build 149,000 motorcycles tbis year, up from 137,000 last year. find the percent of increase in production Would it be 8.75 percent increase? I took 149,000-137,000/137,000 and I got .08759124 and

29. ## chris, Anonymous,,Chris, Kaitlyn

stop it, you are answer grazing.

30. ## chemistry

queous solution of sodium phosphate (Na3PO4). Adding which compound to the solution will cause a phosphate compound to precipitate?

31. ## Chemistry

What mass of sucrose should be added to 75 gram of water to raise the boiling point about 100.35°C.What mass of sucrose is required to produce the solution of this molality?

32. ## Physics

A child’s toy consists of plastic attached to a spring. The spring is compressed against the ﬂoor a distance of 2.46 cm, and the toy is released. The acceleration of gravity is 9.8 m/s2 . If the toy has a mass of 102 g and rises to a maximum height of

33. ## maths

ahmed can type 12 stories each consisting of 200 words in 6 hours.how much time will he take to type 7 such storis

34. ## Mathematics

Find the number of ways digit 0, 1, 2 and 3 can be permuted to give rise to 2000.

35. ## Chem

Complete and balance each of the following molecular reactions. Indicate the phase of each species. If no reaction occurs, write N.R. A) ____ Na2CO3 (aq) + ___ Mg (NO3)2 (aq) --> B)____ K2SO4(aq) + ___ Fe(CH3CO2)2 (aq) --> C)___ AlCl3 (aq) +____ K2S (aq)

36. ## Algebra

find the distance between the pair points (-2, -3) and (-12,-19)

37. ## Comprehension

A Proud Identity for Women Drivers For decades, Russia's women drivers have been laughed off the roads by their male counterparts. A new magazine "Woman at the Wheel" has recently been published with the aim of giving women drivers a proud identity. The

38. ## pysic

If you stick a piece of transparent tape on your desk and then quickly pull it off, you will find that the tape is attracted to other areas of your desk that are not charged. Why does this happen?

39. ## Alebra 2

At what point does the terminal side of the angle (5\pi )/(6) in standard position intersect the unit circle?

40. ## Maths

Ben gives 1/3 of his annual savings to charity he spends 3/5 of the rest on domestic bills. 1. What fraction of his savings does he spend altogether 2. Find the fraction of his savings left.

41. ## Physical Science

An elephant drags a tree trunk along a rough horizontal surface by means of an attached rope which makes an angle of 30° with the horizontal. The force in the rope is 4 000N. CALCULATE the horizontal component of the force exerted by the rope on the tree

42. ## Physics

Hi, I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an antique grandfather clock so that it would still keep accurate time on Mars. If the length of the pendulum on Earth is l, what

43. ## Science

A 60-kg cheetah reaches a speed of 30m\s as it chases its prey. What is the kenetic energy of the cheetah?

44. ## American Government

1) which of the following describes the supreme court's role in defining constitutional principles? A) the supreme court plays a minimal role in defining constitutional principles. B) the supreme court uses judicial review as a tool to define

45. ## Chemistry

Express the absolute value of the partial charges as a decimal fraction of the elementary charge for OH.

46. ## physics

A 0.32 kg box of macaroni is held in place at the front of a 3.14 kg shopping cart only by the force of static friction as the shopping cart accelerates. Determine the minimum acceleration, in m/s 2, that the shopping cart must have if the box is to be

47. ## Chemistry

Express the absolute value of the partial charges as a decimal fraction of the elementary charge for CH. The bond length, is 131.1 pm, and the Dipole Moment, D is 1.46

48. ## Science 6

Renny noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform tricks. How did the oil help? A:The oil reduced friction between the moving parts of the skateboard. B:the oil increased the friction between the

49. ## algebra

Want to make sure I am doing this correctly. Use the Intermediate Value Theorem for polynomials to show that the polynomial function f(x)has zero between the numbers given. f(x)=3x^2-x-4 ; 1 and 2 3(1)^2-1-4= - 2 below zero 3(2)^2-1-4= 6 above zero Am I

50. ## algebra

what are the values of 2-5x=-3x^2 a= -5, b = 3, c = 2 a = -3, b = -5 , c = 2 a = 2, b = -5, c = -3

51. ## english parallel structure

When the movie Star Wars premiered in 1977, it was both surprising and a revolution in its special effects.

52. ## algebra

the discriminant of a quadratic equation is -5 which answers describes the number and type of solution of the equation? 2 complex solutions

74. ## social studies?

I need help with my homework. I have to evaluate free school on: Effectiveness Efficiency Equity

75. ## social stdies

why does oil bring wealth to arabia and iraq? 1.abundance of wells 2.low cost of production this one 3.high global demand 4.scarcity of water

76. ## Algebra

If you walk 4/5mile and then jog 3/8 mile what is the total distance covered how much farther did you walk than jog

77. ## Social Studies

Which of the following was an effect of the discovery of gold and silver on western devolpment? It causes a sharp decrease in the population of eastern cities There was no longer a need for the railroad *The value of gold and silver decreased It

78. ## Math - Calculus

The horizontal velocity is constant. (Ignore air resistance.) Recall from your study of trigonometry that if you release a rock at a speed v in a direction that makes an angle α with the horizontal, then the initial vertical velocity vv and the horizontal

79. ## Math Calc

John was wondering at what speed an arrow leaves a bow when it is released. So he went to a field and shot the bow at an angle of 45 degrees. The arrow hit the ground at a distance of 600 feet. Ignore air resistance. For simplicity, assume that the arrow

80. ## Algebra

Solve the following algebraically using one variable: Find three consecutive even integers such that the product of the smallest integer and the middle integer is eight less than eleven times the larger integer.

81. ## Algebra

An electrician charges a customer $260 for 4 hours. He charges one customer$150 for 2 hours. How much does he charge for his service fee, x, and his hourly charge, y, to his customers? Thank you!

82. ## Algebra

One of the polynomials below cannot be factored using integers. Write “prime” for the one trinomial that does not factor and all the factors for the two that do. a) x2– 5x + 6 b) x2+ x + 6 c) 2x2– 2x + 12

83. ## alegebra

Translate the sentence into an inequality. Six subtracted from the product of 2 and a number is at least 18

84. ## FDU

A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about

85. ## Geometry

(SAT Prep) The perimeter of pentagon ABCDE is 30 in, AB = 7 in, BC = CD = 6 in, DE = 5 in. How many sides of the pentagon have equal length?

86. ## math

Translate the sentence into an inequality. Six subtracted from the product of 2 and a number is at least 18 Use the variable y for the unknown number.

87. ## math

Translate the sentence into an inequality. Twice the difference of a number and 4 is at most 21

88. ## Social Studies

1. What is the Panchantantra? A: a collection of sayings by the Buddha*** B: a book of fables or animal stories C: tales of the Hindu gods D: a recently found text from Mohenjo-Daro I think its A 2. From the text what can you conclude about the Buddha's

89. ## Math

Anna planted peas in 3/8 of her garden and herbs in 1/8 of it. She divides the rest of the garden into 6 sections. What fraction of the original garden is each section?

90. ## HISTORY

american revolution 1775 or 1763? Because I know the first battle was 1775 but I have to make a timeline and put when the event occurred so idk if I should put 1775 or when it all started, 1763.

91. ## Math

What is the amount of sales tax owed on a $39 jacket if the tax rate is 5%?$1.85 $1.90$(1.95) $195.00 A flower arrangement was marked down 12.5%. If the flowers originally cost$20, what is the amount of the discount? $2.40$(2.50) $2.05$17.50 Find the

asked by Help I need somebody not just anybody
92. ## Cheimistry

how much water must be added to a 30ml of 0.5M KOH solution to produce a solution whose concentration is 0.45M?

93. ## Science

describe what happens, at the molecular level, during melting.

94. ## Math

Emma is going camping.Each side triangle on her tent is5 feet tall.The square base 4feet wide.What is the surface area of her tent

95. ## Language Arts

What is the meter of line 6? A wildcat roaring past steep banks A)stressed, unstressed, stressed, unstressed, stressed, unstressed, stressed, unstressed B)unstressed, stressed, unstressed, stressed, unstressed, stressed, unstressed, stressed***

96. ## Physical Science

A delivery man pushes the button to ring the doorbell. Which of the following forms of energy is not involved in this process? electrical sound mechanical gravitational my answer is gravitational

97. ## Maths

There are 150 mangoes in basket p and basket q. 1/4 of the mangoes in basket p were yellow and the rest were green. 3/5 of the mangoes in basket q were yellow and the rest green. The number of green mangoes in both baskets were equal. How many yellow

98. ## Math

Using this formula... E=10^(1.5m+11.4) How much more energy is released in an M = 8.3 earthquake than in an average quake of magnitude M = 6.2? (Round your answer to the nearest integer.)

99. ## Science

what are the similarities between thermal energy and electrical energy

100. ## math

A college student takes a standardized test and scores a 163. If the mean is 155 and the standard deviation is 7, what is the student’s percentile rank? (Assume a normal distribution.)

40% of 101?

102. ## Math

Tell how many terms this expression has : 4c+7 1/2 I don't know how to do this will you please help

103. ## Math

If a drawing is scaled 1/8 inch to the foot, what is the actual length, in feet, represented by 3 1/2 inches on the drawing?

104. ## Science

What is a cation?

105. ## Pretty weird Algebra

In the word of five, where could you see the number of 4?

106. ## pre-Calculus

The coffee starts out at 176 degrees, and cools off like this… Min Degrees 1 169 2 162 3 156 5 146 10 125 15 111 20 101 30 90 60 81 If he measured the coffee at 2 hours and 3 hours, what temperature would it be?

107. ## English

"My parents took me to Universal Studios," said George. George said __________________ Need help for the above question. Thanks.

108. ## science

determine the number of grams of NH4CL that will dissolve in 100 grams of water at 25 Celcius.

Please help I have to do something but do not get what these words mean. Post heart rate Duration

7. Which of the following six organizing principles are evident in Articles I – III of the U.S. Constitution? Select all that apply. A. Limited government.*** B. Separation of powers. C. Judicial review.*** D. Checks and balances. 8. Which of the

111. ## Math-Statistics

CAN SOMEONE HELP ME WITH THIS? A recent study found that, of the 1771 participants aged 12 to 19 in the National Health and Nutrition Examination Survey, 19.5% had some hearing loss (defined as a loss of 15 decibels in at least one ear). This is a dramatic

118. ## Pre calculus

find 2 exponential functions with asymptote of y=80 , with points (0,176) (1,169) (3,156) (5,146) (20,101) (30,90) (60,81).one should have the base of "e"

119. ## statistics and probability

n a written test given to a large class comprising 42 students, the test scores were found to be normally distributed with a mean of 78 and a standard deviation of 7. A minimum score of 60 was needed to pass the test. A score of 90 or greater was needed to

120. ## math

A farmer has enough food to last his 40 cattle 35 days. If he buys 50 cattle, how long can the same feed can last? Let X be the number of days the same feed can last

121. ## Physics

A 250.0 kg motorcycle can roll 45.9 m up a long hill before coming to a stop if the motorcycle approaches the base of the hill 30.0 m/s.

122. ## Physics

What is the total amount of potential energy that can be stored in a 10,000 gallon water tower built with the water tank 61.50 m above ground level?

124. ## math

Identify two regular and two irregular polygons in your home or community. How do you know they are regular or irregular? Give one example of each regular and irregular polygon that you noticed in your home or community. Do you think regular or irregular

125. ## Math

Know if 28 and 3 if the first number is multiple of the second

126. ## Help math

find 2 exponential functions with asymptote of y=80 , with points (0,176) (1,169) (3,156) (5,146) (20,101) (30,90) (60,81).one should have the base of "e"

127. ## Math

You shoot a rifle at an angle of 42 degrees. The bullet leaves your rifle at a height of 6 feet and a speed of 810 feet per second. So I used the equation h(t)=6+(810 sin42)t-16t^2 to calculate that the bullet will hit the ground after 33.88580 seconds.

128. ## algebra

Eye color is determined by genetic combinations.There are 4 possible genetic combinations: RR=Brown,RL=Brown,LR=Brown,LL=Blue.Show a 4 square Punnett square that models these conclusions. Thank you.I hope someone can show me the solution.

129. ## Algebra 2

It takes 12 hours for 8 people to paint a house. How long will it take 3 people to do the job? I'm not really sure how to go about solving this problem.

130. ## Algebra 2

Find an equation of variation in which y varies inversely as x and the following is true: y=31, when x=4 Originally, I mixed up the equations of inverse and direct variation, and got 31=m(4) ----- b Obviously, I got it wrong, but I've gone ahead and redid

131. ## chemistry

How many grams of NH4Cl will dissolve at 50 degrees C?

132. ## chemistry

How many grams of O2(g) are needed to completely burn 17.3 g of C3H8(g)?

133. ## chemistry

If 25 g of NH4Cl is dissolved at 80C, how many additional grams would be needed to make the solution saturated?

134. ## Math

The 112th Congress of the United States of America has 535 members, of which 87 are women. An alien lands near the US Capital and treats members of Congress as a random sample of the human race. He reports to his superiors the 95% confidence interval for

135. ## Philosophy

1.What is Pascal's Wager? A.A bet that one cannot lose B.An argument for probability theory C.An argument for the existence of God D.An argument for why you should believe in God E.None of the above 2.Who was Pascal? A.A painter B.A bishop C.A