1. Archives
  2. 2013
  3. December

Questions Asked on
December 6, 2013

  1. physics

    Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.

    asked by sam

  2. science

    which of the following is a consequence of using fossil fuels as an energy source

    asked by Anonymous

  3. Statistic

    A statistic instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and weighed the bags.They weighed 10.4, 10.9 , 10.8, and 9.9 pounds.assume that the distribution of the weights is normal. Find a 95% confidence interval for the

    asked by Jaz

  5. chemistry

    A reaction with an equilibrium constant Kc = 1.5 x 1021 would consist of which of the following at equilibrium: A) approximately equal reactants and products B) some reactants and products with reactants slightly favored C) some reactants and products with

    asked by Cody

  6. Physics

    A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp. A)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5 m above the cars and the horizontal distance he must

    asked by Somoan

  7. Chem 101

    In a fission reaction, uranium-235 bombarded with a neutron produces strontium-94, another small nucleus, and 3 neutrons. Write the nuclear equation for this reaction.

    asked by Holly

  8. physics

    The height of the Washington Monument is measured to be 170 m on a day when its temperature is 35.0°C. What will the change in its height be on a day when its temperature falls to -12.0°C? Although the monument is made of limestone, take the thermal

    asked by angela

  10. Math

    Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to

    asked by LISA

  11. Science- Ms. Sue

    What evidence was found from soft tissue samples of a remarkable well-preserved Tyrannosaurus Rex that provided molecular evidence linking T.Rex to a chicken? A. Antibodies that react in a specific way with chicken proteins reacted in the same way with T.

    asked by Anonymous

  12. Science- Ms. Sue

    The image below shows an example of a _______ fossil. connexus. com/content/media/917517-4162013-74053-PM-1148399744.jpg Is it a body fossil?

    asked by Anonymous

  13. Chemistry

    Write a balanced equation for an alpha particle from Gd-148

    asked by Maria

  15. Chemistry 152

    to obtain the rate of the reaction 5Br-(aq) +BrO3- (aq) + 6H+ (aq) ---3Br2(aq) + 3H2O(l) you might follow the Br concentration or the BrO concentration.How are the rates in terms of these species related?

    asked by Annette

  16. Science ASAP

    A geologist is studying a layer of soil in the Sahara. The soil layer contains little humus but a lot of clay and other rock particles. Which soil layer is it? A) A horizon B) B horizon C) C horizon D) bedrock

    asked by Mileena

  17. statistics

    Nine students took the SAT. Their scores are listed below. Later on, they read a book on test preparation and retook the SAT. Their new scores are listed below. Construct a 95% confidence interval for µ d (the true mean difference in scores). Assume that

    asked by Anonymous

  18. Chemistry

    The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant? a. 6.93 s-1 b. 0.693 s-1 c. 0.0693 s-1 d. 0.144 s-1 e. 3.01 s-1

    asked by Shines

  20. chemistry

    Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy

    asked by ellie

  21. Quick Science Check?

    A biologist is constructing a cladogram to show the evolutionary relationships between the animals shown below. If anatomical features are used to construct the cladogram, which animal will be placed farthest from the shown animal? Animal shown: connexus.

    asked by Anonymous

  22. chemistry

    A reaction with an equilibrium constant Kc = 1.5 x 1021 would consist of which of the following at equilibrium:

    asked by Cody

  23. Chemistry

    An aqueous solution containing 17.1 g of an unknown molecular compound ( nonelectrolyte) in 105.0g of water was found to have a freezing point of -1.8 degrees Celsius. What is the molar mass of the unknown compound?

    asked by John

  25. Math

    I Need Help With Two Questions The First One Is Find The Distance Between Riverside And Milton If They Are 12 Cm Apart On A Map With A Scale Of 4 cm : 21 Km And The Second One Is Oak Grove And Salem Are 87 Mi From Each Other . How Far Apart Would The

    asked by Emarahi

  26. physics

    A boy jumps at a speed of 16.0 m/s at an angle of 20.0 above the horizontal. How long does he stay in the air before touching the ground? A. 1.53 s B. 1.12 s C. 3.07 s D. 4.2 s

    asked by laura

  27. physics

    Person A walks 6.0 m at an angle of 30 north of east. Person B walks 7.0 m at an angle of 42 west of north. How does the component of the displacement of person A along the north direction compare with the component of the displacement of person B along

    asked by laura

  28. Statistics

    Draw a vertical line through a normal distribution for each of the following z-score locations. Determine whether the body is on the right or left side od the line and find the proportion in the body. a. z= 2.20 b. z= 1.60 c. z= -1.50 d. z= -0.70

    asked by Lyndyc

  30. physics

    A 5.0 kg \rm kg, 52-cm \rm cm-diameter cylinder rotates on an axle passing through one edge. The axle is parallel to the floor. The cylinder is held with the center of mass at the same height as the axle, then released. a)What is the magnitude of the

    asked by Chloe

  31. history

    What body of water touched Latin,Eastern Orthodox and pagan lands?

    asked by Anonymous

  32. math

    Forces are applied to two ropes which are attached to the bumper of a stalled car. If F1 = 100 lbs at an angle of θ1 = 58 degrees, find the necessary magnitude and direction of force F2 so that the resultant force is 190 lbs in the direction shown.

    asked by nick

  33. Chemistry

    The dosage of technetium-99m for a lung scan is 20 μCi/kg of body weight: Suppose a person absorbed 52mrads of alpha radiation. What would be the dose equivalent in mrems?

    asked by Pat

  35. language

    Is it , The leaves were shaken from the branches .

    asked by Gabe

  36. physics

    Some incandescent light bulbs are filled with argon gas. What is vrms for argon atoms near the filament, assuming their temperature is 2100 K?

    asked by angela

  37. chemistry

    A reaction with an equilibrium constant Kc = 1.5 x 1021 would consist of which of the following at equilibrium:

    asked by Cody

  38. mit physsics

    A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 200 kg and radius 110 cm (consider the metal poles to have a negligible mass compared to the

    asked by juanpro

  40. Chemistry

    A reaction is first order in A. If the rate constant of the reaction is 3.45x10^-3 s-1, what is the half life of the reaction? a. 4.98x10^-3 s b. 200 s c. 3.45x10^-3 s d. 100 s e. 1.73x10^-3 s

    asked by Shines

  41. science

    which of the following sets of term is associated with air pollution caused by burning fossil fuel jiskha homework

    asked by Anonymous

  42. PHYSICS

    block 3M slides downward without friction. The string connecting blocks 3M and M is ideal (that is, its mass can be neglected and it is not stretchable). The pulley, a uniform solid disc of mass M and radius r , rotates without slipping. Find the

    asked by Ramana

  43. physics

    A 0.0400 kg ice cube at -30.0°C is placed in 0.400 kg of 35.0°C water in a very well insulated container. What is the final temperature?

    asked by angela

  45. Statistics

    Draw a vertical line through s normal distribution for each of the following z-score locations. Determine whether the tail is on the right or left side of the line and find the proportion in the tail. a. z=2.00 b. z=0.60 c. z= -1.30 d. z= -0.30

    asked by Lyndyc

  46. Geometry

    If x is the midpoint of line vy and wz and the reason is given then wx=xz and vx=xy then angle wxv = angle yzx to get the triangle vwx congruent to triangle yzx then what would be the reasons after given to make the triangle congruent

    asked by Anonymous

  47. Math

    In a shipment of alarm clocks, the probability that one alarm clock is defective is 0.04. Charlie selects three alarm clocks at random. If he puts each clock back with the rest of the shipment before selecting the next one, what is the probability that all

    asked by nikkie

  48. Classical Mechanics Physics

    A yoyo of mass m=2 kg and moment of inertia ICM=0.09 kg m2 consists of two solid disks of radius R=0.3 m, connected by a central spindle of radius r=0.225 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed

    asked by Anonymous

  50. Math

    A builder has 8 lots available for sale. · Six lots are greater than one acre. · Two lots are less than one acre. What is the probability that the next three lots sold will be greater than one acre?

    asked by nikkie

  51. math

    A farmer's tractor has gotten stuck in a muddy pasture. To try to free the tractor, the farmer ties a rope to a tree and the front of her tractor, then pulls sideways in the middle of the rope with a force of F = 510 N. Angles of θ = 5 degrees are formed

    asked by nick

  52. PHYSICS(HELP)

    A yoyo of mass m=1 kg and moment of inertia ICM=0.045 kg m2 consists of two solid disks of radius R=0.3 m, connected by a central spindle of radius r=0.225 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed

    asked by KS

  53. English

    Select the letter of the answer that best corrects the element in parentheses. Answer should reflect clearest and concise wording and not change the meaning of the sentence. He agreed to to interview the candidate (waiting in the lobby in the red suit.)

    asked by Destin

  55. physics

    A yoyo of mass 2 kg and moment of inertia 0.04 kg m consists of two solid disks of radius 0.2 m, connected by a central spindle of radius 0.15 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed upright on a flat

    asked by juanpro

  56. chemistry

    Complete the following fission reaction 1n0 + 235U92 → 131Sn50 + ? + 2 1n0 + energy

    asked by ellie

  57. Math

    A bicycle has a 100 cm diameter wheel. If you ride on and around a circle with a 10 km diameter 12 times, how many revolutions does the wheel make?

    asked by Xian

  58. math

    Two squirrels are sitting on a rope as shown. The tension in segment BD is TBD = 6.3 lb at an angle of ϕ = 47 degrees. The tension in segment AB is TAB = 5.229 lb. Find the weight of the squirrel at B and the angle α.

    asked by nick

  60. Physics

    A 4.0 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.6◦ with the horizontal. An average frictional force of 4.0×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is

    asked by Artemis

  61. English

    Select the letter of the pair of words that expresses a relationship expressed by the following pair 1.Stethoscope:doctor a.manager: trainee b.best-seller: publisher c.tool:shovel d.microphone:broadcaster 2.cubism:art a.dictatorship:government b.suit:vest

    asked by Help

  62. physics

    A 2.41 kg ball is attached to a ceiling by a 1.86 m long string. The height of the room is 3.38 m. The acceleration of gravity is 9.81 m/s 2 . What is the gravitational potential energy associated with the ball relative to a) the ceiling? Answer in units

    asked by Graham

  63. math

    if the point (3/5,4/5) corresponds to an angle È in the unit circle, what is tan È?

    asked by matt

  65. physics

    The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. To see just how rapidly windows conduct heat, calculate the rate of conduction in watts through a 3.00 m2 window that is 0.600 cm thick if the

    asked by sam

  66. physics

    A spherical non-rotating planet (with no atmosphere) has mass 4 kg and radius 9000 km. A projectile of mass is fired from the surface of the planet at a point with a speed at an angle with respect to the radial direction. In its subsequent trajectory the

    asked by juanpro

  67. Trigonometry - Geometry - side lengths

    In convex quadrilateral ABCD, angle A is congruent to angle C, AB=CD=180, and AD is not equal to BC. The perimeter of ABCD is 640. Find cos A. Hmm...I drew the diagram, and labeled some things, I drew an altitude from D to AB and did some other things, but

    asked by Sam

  68. Classical Mechanics Physics

    A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume

    asked by Anonymous

  70. physics

    A 2.00 g lead bullet traveling at 650 m/s strikes a target, converting its kinetic energy into thermal energy. It's initial temperature is 40.0°C. Find the available kinetic energy of the bullet. Find the heat required to melt the bullet (both answers in

    asked by angela

  71. Physics

    Consider a rocket in space that ejects burned fuel at a speed of vex= 2.0 km/s with respect to the rocket. The rocket burns 8 % of its mass in 300 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 150.0 s?

    asked by KS

  72. physics

    A barefoot field-goal kicker imparts a speed of 44 m/s to a football initially at rest. If the football has a mass of 0.49 kg and the time of contact with the ball is 0.028 s, what is the magnitude of the force exerted by the ball on the kicker’s foot?

    asked by Lindsey

  73. mit physics

    A spherical non-rotating planet (with no atmosphere) has mass m 1= 6 ×10 24 kg and radius r 1= 9000 km. A projectile of mass m 2≪ m 1 is fired from the surface of the planet at a point A with a speed v A at an angle α=30 ∘ with respect to the radial

    asked by juanpro

  75. Classical Mechanics Physics

    A spherical non-rotating planet (with no atmosphere) has mass m1= 3 ×1024 kg and radius r1= 8000 km. A projectile of mass m2≪m1 is fired from the surface of the planet at a point A with a speed vA at an angle α=30∘ with respect to the radial

    asked by Anonymous

  76. English

    1.the trip led to an argument between Helen and ____ a.I b.me 2. It was ____ who demanded an apology from the newspaper. a.we b.us 3. We appreciated ____ writing a personal letter to explain his stand on the issue. a.his b.him 4. The most outspoken critics

    asked by Ray

  77. math

    The probability of not picking a purple marble out of a bag of marbles is 2/5, if 2 purple marbles are taken out of the bag, reducing the number of purple marbles to 4, what will the new probability of picking a purple marble be?

    asked by kim

  78. Dyanamics

    Explain loss of kinetic energy due to oblique impact...

    asked by vinod

  80. Math :)

    In a bag of 10 marbles, there are 5 blue marbles, 3 red marbles, and 2 white marbles. Complete the probability distribution table for drawing 1 marble out of the bag. Draw a: Probability Blue marble 5/10 Red marble 3/10 White marble 2/10 Total: 10 Am I

    asked by Kamie

  81. PHYSICS

    A yoyo of mass m=2 kg and moment of inertia ICM=0.09 kg m2 consists of two solid disks of radius R=0.3 m, connected by a central spindle of radius r=0.225 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed

    asked by anonymous

  82. physics

    Which of the following statements is a true statement? A. A vector can have positive or negative magnitudes. B. A vector's magnitude cannot be more than the magnitude of one of its components. C. If the x-component of a vector is smaller than its

    asked by laura

  83. Classical Mechanics Physics

    A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 210 kg and radius 110 cm (consider the metal poles to have a negligible mass compared to the

    asked by Anonymous

  85. Geometry

    Find the missing numbers for the dimensions and measures of a rectangular prism... Length ? Width 7 m Height 5 m Surface Area 214 m to the second power Volume ? Please answer the one's with a ?. Thank you.

    asked by Jacob

  86. language

    Is this punctuation correct for this sentence ? " Here's a hard one , " taunted Wilma .

    asked by Gabe

  87. Algebra

    I have an assignment to write an equation to point-slope form, then to standard form, and then to slope-intercept form. I have used the points (-2,-1) or (1,2), but I used (-2,-1). Now, I have the point-slope form of y + 1= 1(x + 2) and the standard form

    asked by Anonymous

  88. Statitics

    How to find mean, standard devation , confedince interval 95%, t= test , pvaule and do a hypo test using data? Short 25 Average 5 No Preference. 10

    asked by jame

  90. Dyanamics

    A particle of mass m moves in a x-y plane. the co-ordinates of the particle at any instant are given by x=acos(wt) & y=bsin(wt) where a,b,w are constsnt.Determine the angular momentum of the particle with .r.to the origin of the co-ordinate system

    asked by vinod

  91. statistics

    The espresso project you are heading up will do well with probability 0.80. Given that it does well, you believe that the herbal tea project is likely to do well with probability 0.70.However, if the espresso project does not do well, then the herbal tea

    asked by nemo

  92. mit physyscs

    A block of mass 2 kg is initially at rest on a horizontal surface. At time , we begin pushing on it with a horizontal force that varies with time as , where 0.6 N/s . We stop pushing at time s [ for ]. (a) First, assume the surface is frictionless. What is

    asked by juanpro

  93. help

    a number machine takes any number put into it, multiplies it by 3 and then subtracts 2. reuben put a number into the machine. he took the new number that came out and put that number back into the machine. He took the new number that came out and put that

    asked by math

  95. Classical Mechanics Physics

    Consider a rocket in space that ejects burned fuel at a speed of vex= 1.5 km/s with respect to the rocket. The rocket burns 6 % of its mass in 310 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 155.0 s?

    asked by Anonymous

  96. Classical Mechanics Physics

    A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

    asked by Anonymous

  97. Advanced Functions/Precalculus

    1. The expression sinπ is equal to 0, while the expression 1/cscπ is undefined. Why is sinø=1/cscø still an identity? 2. Prove cos(ø + π/2)= - sin ø

    asked by john

  98. algebra

    CLEAN CARPET COMPANYS CLEAN 3 ROOMS OF CARPETING FOR 144 DOLLARS. WHICH OF THE FOLLOWING IS AN EQUIVALENT RATE ? A.288 DOLLARS FOR 6.5 ROOMS B. 240 DOLLARS FOR 5.5 ROOMS C. 360 DOLLARS FOR 7.5 ROOMS D. 192 DOLLARS FOR 4.5 ROOMS

    asked by JAYNE

  100. Math

    A 5 inch by 8 inch rectangle is enlarged to a similar rectangle whose smallest side measures 9 inches. What is the length in inches of the diagonal of the enlarged rectangle?

    asked by Xian

  101. Dyanamics

    Two ships A&B leave port at same time the ship A is north-west at 32km/hr & ship B is 40degree south of west at 24 m/hr determine 1)the speed of ship B relative to ship A 2)At what time they will be 150km apart

    asked by vinod

  102. English

    Select the letter that indicates the correct noun or pronoun in the following sentence. If both choices are correct, select the pronoun. 1. The last time Kevin and Denise were here was right after ____ had broken her ankle. a.she b.Denise 2. In the

    asked by Balerie

  103. 5th grade science

    Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole

    asked by Jane

  105. science help please?????????????

    A student wishes to test the accuracy of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of

    asked by centya

  106. economic

    College enrollments increased at the same time that average tuition rose dramatically. Does this contradict the law of downward-sloping demand? Explain. (b) Use supply and demand model to explain the dramatic rise in the price of a college education

    asked by Terita

  107. physics-magnetsism

    A conducting slider (thick line) moves without friction along a vertical U-shaped conducting track (thin line) in a magnetic field. When the switch has been closed for a long time, what is the magnetic field magnitude inside the inductor in Tesla?

    asked by A.J.J

  108. Physics Classical Mechanics

    MIT A uniform disc of mass m and radius r is acted upon by three forces. find the magnitude of angular acceleration and the sense of rotation. Three different cases. force F, 3F, 2F. need help, not doing so good.

    asked by Hil

  110. Math

    What is the maximum number of points of intersection of two different lines and three different circles in the same plane?

    asked by Xian

  111. Algebra

    Can anyone help me with this problem? I need to show all steps and explain what is happening. A graph would be great for a visual too if possible. Thank you for any help. We define the following functions: f(x) = 2x + 5, g(x) = x^2 – 3, h(x) = 7 – x /

    asked by Lois

  112. English

    There are about twenty of us, men and boys, working here in the valley. ----------------- Q1 What is the relationship between 'us' and men and boys'? Does 'men and boys' mean 'about twenty' or 'us'? Q2 What does the previous sentence mean, #1 or #2? 1.

    asked by rfvv

  113. Englsih

    1. He gave the gold bracelet to me for my birthday. 2. He gave the gold bracelet to me on my birthday. ---------------- What is the difference between the two sentences. For #2, he gave it on the very birthday. For #1, he may have given it on the very

    asked by rfvv

  115. physics

    Consider a rocket in space that ejects burned fuel at a speed of vex= 2.0 km/s with respect to the rocket. The rocket burns 10 % of its mass in 340 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 170.0 s?

    asked by anonymous

  116. asking for a teacher's opinion

    Do you think rounding borderline letter grades up or down is a fair practice? Or should they just stay where they are? For example, I think that an 89.5% should round up to a 90%. I have one instructor right now who considers an 89.99% to still be a B

    asked by Gloria

  117. Math

    12. In a triangle ABC, AC = 36, BC = 48, and the medians BD and AE to sides AC and BC, respectively, are perpendicular. Find AB.

    asked by Xian

  118. math

    In triangle XYZ, the measure of angle Y is twice the measure of angle X, and the measure of angle Z is three times the measure of angle X, what is the measure of angle Y ?

    asked by David

  120. math

    The length of a rectangle is three times its width. If the area of the rectangle is 48, what is its length?

    asked by kim

  121. history

    The first stirrings of the first Great Awakening took place in A. the backcountry. B. New England. C. the Carolinas. D. Virginia.

    asked by Anonymous

  122. Math

    In triangle MABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of MABC is 108?

    asked by Xian

  123. Algebra

    Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want

    asked by Anonymous

  125. Dyanamics

    A train is travelling along the circular curve of radius 200m at the instant shown its angular rate of rotation is 10 rad/s which is decresing at 0.2 rad/s determine the magnitude of the trains velocity & acceleration at this instsnt...

    asked by vinod

  126. psych

    what are some biological and social influences of temperament and what ways are caregivers limited in being able to change an infant's temperament

    asked by Anonymous

  127. physic

    Consider a rocket in space that ejects burned fuel at a speed of 1.5 km/s with respect to the rocket. The rocket burns 9 % of its mass in 310 s (assume the burn rate is constant). (a) What is the speed of the rocket after a burn time of 155.0 s? (suppose

    asked by juanpro

  128. Chemistry

    What volume of 5% vinegar solution is needed to neutralize 1.0g of baking soda if density is 1.01g/ml

    asked by Marianna hutchinson

  130. English

    Select the letter of the pair of words that expresses a relationship expressed by the following pair 1.Stethoscope:doctor a.manager: trainee b.best-seller: publisher c.tool:shovel d.microphone:broadcaster 2.cubism:art a.dictatorship:government b.suit:vest

    asked by Help

  131. english

    I want an essay on United we stand,divided we fall along with some quotes used in it

    asked by Honey

  132. Science ASAP

    How does the C horizon form? A) color and chemistry B) texture and pure space C) decayed organic matter D) oil

    asked by Mileena

  133. physics

    A ruler stands vertically against a wall. It is given a tiny impulse at such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that . The ruler has mass 250 g and length 30 cm.

    asked by juanpro

  135. science

    An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT?

    asked by ty

  136. i need help math

    Ines became the manager of an electronics store. She decided to provide customers with a great holiday deal. A customer will be able to purchase 3 big screen televisions at the following price, the first one at the full price of $750, the second one will

    asked by eduarda

  137. History

    Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?

    asked by miramar high

  138. Business Math

    Principal is $1700, Rate is 12%, Days 33. What is the exact interest?

    asked by Dawn

  140. Chem

    If the calibration curve for a Beer's Law plot of a protein assay had a slope of 0.433 when absorb acne, A, was plotted as a function of protein concentration, c, in mg/mL. The absorbance of an unknown protein sample was 0.345. What is the concentration of

    asked by S

  141. math

    Experimentally it is found that a 6 kg weight stretches a certain spring 6 cm. If the weight is pulled 4 cm below the equilibrium position and released: a. Set up the differential equation and associated conditions describing the motion. b. Find the

    asked by Anonymous

  142. math

    If the circumference of a circle is 16 pi, what is its area ?

    asked by David

  143. science

    Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole

    asked by Jane

  145. language

    Is this the correct past-tense helping verb and main verb for the rewrite of this sentence ? The leaves were shook from the branches . The leaves was shaken from the branches .

    asked by Gabe

  146. 5th grade science

    Which of the following is an example of a nonmnetal conductor? copper wire, salt water, plastic covering of a wire, or cotton clothing?

    asked by Jane

  147. algebra

    Determine X and Y

    asked by 3=36x-3y

  148. Bio

    What denotes the main relationship between protists and prokaryotes? do they both undergo transcription and translation? do they have different genetic codes?

    asked by Amanda

  150. Logic

    A fallacy is an argument that a. is a weak inductive argument. b. makes a mistake in deriving a conclusion. c. has a false conclusion. d. is a sound inductive argument.

    asked by Joe

  151. Intermediate FT

    Solve. 3/x+4/x+2=2

    asked by JaimeC FT

  152. science

    Which of the following is an example of a nonmnetal conductor? copper wire, salt water, plastic covering of a wire, or cotton clothing?

    asked by Jane

  153. physics

    true or false an object with a mass of 9.0 kg has an acceleration of 3 m/s. the force acting on it is 3n

    asked by ashley bell

  155. Algebra 2

    What are the solutions? 1/2x^2+2x+3=0

    asked by Mania

  156. Biochem

    If the calibration curve for a Beer's Law plot of a protein assay had a slope of 0.433 when absorb acne, A, was plotted as a function of protein concentration, c, in mg/mL. The absorbance of an unknown protein sample was 0.345. What is the concentration of

    asked by S

  157. Pre-Calculus

    convert to the alternate form to exponential form. a) 5^4=625 b) e^x=y c) log.001=x I really need help on these problems i have no idea how to do it? pls help me i need to study for it on my exam.

    asked by Lane

  158. Pre-Calculus

    Solve the equation 2x + 5y - 3z = -1. Write the general solution as a matrix equation. [x] [ ] [1] [y]= [ ] X [s] [z] [ ] [t] I'm supposed to fill in that blank in the middle, but I don't understand how to solve this if I'm only given one equation. please

    asked by Ann

  160. math

    Determne the number of days of the loan. Loan Date is Oct 20. Due Date is Dec 18. Whats the number of Days?

    asked by Dawn

  161. algebra 1

    please help I have no clue how to do this b-9+6b =30

    asked by nichole

  162. Math

    This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS). Please help! I'm so confused.

    asked by Mer

  163. English

    He died when he was eighteen. That's only one year older than me. ----------------------------- What does 'That' refer to in the second sentence?

    asked by rfvv

  165. algebra3

    how do you work with factoring GCF problems?

    asked by Taylor

  166. spanish

    How to write 25,350

    asked by sofia

  167. Math

    If I graph (-2,-1) and (1,2) on a graph, would I have y = x + 1 as the equation in slope-intercept form?

    asked by Anonymous

  168. English

    Need help revising this paragraph Some folks don’t mind lots of clutter scattered around the house. Others can’t stand that idea. Even doing dishes can be a point of contention. One roommate might see nothing wrong with placing dirty dishes in the sink

    asked by Leslie

  170. Chem

    A radioactive isotope sample has a hal

    asked by Lulu

  171. Dyanamics

    A force acting on the body of mass 10kg changes its velocity from 30 miles/hr to 45 miles/hr find the impulse of the force...

    asked by vinod

  172. physics

    a student is riding in an elevator moving vertically down at a constant speed V. If the mass of the student is M, the power delivered to the student by the normal force of the elevator floor is: +MgV zero -MgV MgV^2

    asked by sttslt

  173. Easy Statistics

    The probability Joe is at work is 49%,. The probability Joe is at home is 25%. What is the probability Joe is neither at work nor at home? a) 39% b)74% c)52% d) 26% *I personally think it is a or c. I am just needing some help thanks!

    asked by Dawn

  175. physic

    A source of sound emits waves at a frequency 650 Hz. An observer is located at a distance 190 m from the source. Use m/s for the speed of sound. (a) Assume completely still air. How many wavefronts (full waves) are there between the source and the

    asked by juanpro

  176. meteogology

    Does the equator receive perpendicular sun rays to the Earth's surface most of the 365 day year.

    asked by Anonymous

  177. asap

    solve? how do i do this? lmx=5

    asked by pauline

  178. Science

    what is the definition of nutrient?

    asked by Z

  180. Pre-Calculus

    Solve the equation 2x + 5y - 3z = -1. Write the general solution as a matrix equation. I did some guessing and ended up getting this much: [x]= [-1/2 _ _ ] X [1] [y]= [ 0 1 0 ] X [s] [z]= [ 0 0 1 ] X [t] however I still can't figure out the last two values

    asked by Ann

  181. Comp and communication

    What are 200 words to explain the importance of purpose,audience,tone,and content in academic writing?

    asked by Chaka

  182. Algebra 1

    I not sure how to do these problems can someone help. a^-1b-2 2x^-3y^1

    asked by Aaron

  183. math

    has a vertex of (0,2) and points (1,8)find a,b,c

    asked by lk
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