Questions Asked on
November 30, 2014

Chemistry
Calculate the standard entropy, ΔS°rxn, of the following reaction at 25.0 °C using the data in this table. The standard enthalpy of the reaction, ΔH°rxn, is –44.2 kJ·mol–1. C2H4(G)+H20 > C5H5OH ΔS°rxn= ______ J*K^1*mol^1 Then, calculate
asked by Patrick Panasko 
math
The ratio of cups of water to cups of milk in a recipe is 1 to 3. Write three ratios equivalent to the ratio?
asked by jordon 
Physics
The surface area of an adult human is about 1.8m2 . Suppose a person with a skin temperature of 34 ∘C is standing nude in a room where the air is 25∘C but the walls are 17 ∘C. A) There is a "deadair" layer next to your skin that acts as insulation.
asked by Drew 
SIXTH GRADE MATH
The ratio of wins to losses for a basketball team is 2:3. Which of the following is a possible total number of games? A. 7 games B. 14 games C. 25 games D. 26 games Can someone show me how to solve this problem please?
asked by Stephon 
Chemistry (Titrations)
In order to standardize a KMnO4 solution, 0.2848 g Fe(NH4)2(SO4)2·6H2O was dissolved in 25 mL 0.18 M H2SO4. The KMnO4 solution was added to the Fe(NH4)2(SO4)2·6H2O solution until a pale pink color persisted. The titration took 24.2 mL of KMnO4 solution.
asked by Bill 
science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a massspring system, greatly increasing efficiency. Normally, the jellyfish emits one
asked by Jason 
Math Stats
The following data represent the age (in weeks) at which babies first crawl based on a survey of 12 mothers. 52, 30, 44, 35, 47, 37, 56, 26, 35, 35, 52, 52 __________________________________________________________________________ Construct a 95%
asked by STATS 4 
math
Tina says that 6:8 is equivalent to 36:64. What did Tina do wrong?
asked by eugene 
English
1. If it rains tomorrow, I will not start. 2. If it should rain tomorrow, I will not start. 3. If it rained tomorrow, I would not start. 4. If it rained yesterday, he didn't go to work.  Are they all grammatical? Which ones are not grammatical?
asked by rfvv 
Math PLEASE HELP ME
A man has $210,000 invested in three properties. One earns 12%, one 10% and one 8%. His annual income from the properties is $20,100 and the amount invested at 8% is twice that invested at 12%. How much is invested in each property? at 12% 10% and 8% What
asked by James 
Algebra
A confectioner sells two types of nut mixtures. The standardmixture package contains 100 g of cashews and 200 g of peanuts and sells for $1.85. The deluxemixture package contains 150 g of cashews and 50 g of peanuts and sells for $2.45. The confectioner
asked by Jessica 
physics
Two boys stand on the surface of a frozen lake where μs = 0.15 and μk = 0.10. The 30.0 kg boy shoves the 40.0 kg boy with a horizontal force of 50.0 N, 0.0°. Find the resulting acceleration of each boy.
asked by Mush 
English (Reunion by John Cheever)
In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does
asked by Aly 
MATH
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:
asked by LADO 
Solid Mensuration
A circle having an area of 452 square inches is cut into two segments by a chord, which is 6 inches from the center of the circle. Find the area of the bigger segment.
asked by Sol 
Calculus,Reaction rates
A man walks across a bridge at the rate of 5 ft/s as a boat passes directly beneath him at 10 ft/s. If the bridge is 10 ft above the boat, how fast are the man and the boat separating 1 second later?
asked by ray 
Differential equations in Calculus...plsssss help?
Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = 1/15T+5 15T + 5. a) Supposes that T(0)
asked by Bridget 
Statistics
A popular resort hotel has 300 rooms and is usually fully booked. About 4% of the time a reservation is cancelled before 6:00 PM deadline with no penalty. What is the probability that at least 280 rooms will be occupied? Use binomial distribution to find
asked by Richa 
Chemistry
I need chemistry help. I think 1. c, 2.b, & 3.a (please tell me why or why not and help me set up the problems if possible) 1.) The following half reaction has been balanced except for the electrons. How many and where should the electrons be included? 14
asked by Tyler 
math
Sinea and Ren are going to the carnival next $8, souvenirs  $20 Sinea wants to spend money using the same ratios as on her last trip to the carnival. If she spends $26 on games, how much will she spend on souvenirs? Ren wants to spend money using the same
asked by jordon 
Social studies
Athens does not live up to Pericles ideal democracy because Athenians use of ostracism contradicts Pericles statement that all have equal participation  Athens somewhat lives up to Pericles ideal democracy because it only allowed native born, male
asked by Nicole 
Chemistry
Consider the reaction for the production of NO2 from NO: 2 NO(g) + O2(g) = 2 NO2(g) a)If 84.8L of O2(g), measured at 35 degrees Celsius and 632mm Hg, is allowed to react with 158.2g of NO, find the limiting reagent. b) If 97.3L of NO2 forms, measured at 35
asked by Kirsty 
Math
Which of the expressions is not equivalent to 1/25? A. 5^3×5^5 B. 5^1×5^1 C. 5^3×5 D. 5^2×5^4
asked by Anon 
Solid Mensuration
The area of a regular hexagon inscribed in a circle is equal to 166.28 square cm. If the circle is inscribed in a square, find the difference between the area of the square and the hexagon.
asked by Sol 
art
why would an artist chose to use harmony in a piece of artwork?
asked by elizabeth 
Please answer
An agricultural researcher is interested in estimating the mean length of the growing season in a region. Treating the last 10 years as a simple random sample, he obtains the following data, which represent the number of days of the growing season. 153 164
asked by STATS 2 
STATS MATH 1
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1065 people age 15 or older, the mean amount of time spent eating or drinking per day is 1.62 hours with a standard deviation of
asked by LADO 
math
Kendra has a painting canvas that is 27 inches wide by 33 inches high. She painted a red rose, which covered 40% of the canvas. What was the area of the canvas which was covered by the red rose?
asked by jamie 
Math please help!
A glass of skim milk supplies 0.1 mg of iron, 8.5 g of protein, and 1 g of carbohydrates. A quarter pound of lean red meat provides 3.4 mg of iron, 22 g of protein, and 20 g of carbohydrates. Two slices of wholegrain bread supply 2.2 mg of iron, 10 g of
asked by Steve 
Physics
A 1.75kg wooden block rests on a table over a large hole as in the figure below. A 5.20g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum
asked by Ana 
algebra
You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the
asked by darlene 
Algebra word problem
Mary is two years older than Robert. The sum of their ages is 28. Write an expression for each person, write the equation for the situation and find out how old each person is.
asked by Lee Ann 
ps316
There 112 seats there 7 seats in each row and 70 people are seated how many rows are empty
asked by janice 
AB Calculus
I figured out that part "A" is 3/8, but i can't figure out part 2, a or b. please explain and help. thanks. Sand is falling from a rectangular box container whose base measures 40 inches by 20 inches at a constant rate of 300 cubic inches per minute. a)
asked by Jake 
physics
a force of 10n cause a spring to extened by 20 mm find? the extension of the spring when 25n is applied
asked by mubarak 
chemistry
If you place 10.0 L of propanol (C3H8O) in a sealed room that is 3 m long, 2.75 m wide, and 2.5 m high, will all the propanol evaporate? If some liquid remains, how much will there be? The vapor pressure of propanol is 10.7 torr at 25 °C, and the density
asked by chris 
Physics
The acceleration of gravity is 9.8 m/s^2 . What is the magnitude of the total force on a(n) 72 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 61 m/s in 7.8 s? Answer in units of kN
asked by Jackie 
physics
a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the
asked by jhon 
chem 200
669 cal of heat is added to 5.00 g ice at –20.0 °C. What is the final temperature of the water?
asked by k 
maths
April has 3 pounds of trail mix. She puts equal of amounts in each of 8 bags. How much trail mix is in each bag?
asked by ann 
Physics
A child of mass m is playing on a merrygoround which has mass 6m and radius r. Assume the merrygoround is a uniform disk. The child is standing on the edge of the merrygoround, which is spinning with an angular speed ω1. a) What is the moment of
asked by Alex 
statistics
A simple random sample of students is selected, and the students are asked how much time they spent preparing for a test. The times (in hours) are as follows: 1.3 7.2 4.2 12.5 6.6 2.5 5.5 Based on these results, a confidence interval for the population
asked by Brian 
Algebra
A woman wishes to invest $12,500 in three types of bonds: municipal bonds paying 8% interest per year, bank investment certificates paying 9%, and highrisk bonds paying 12%. For tax reasons she wants the amount invested in municipal bonds to be at least
asked by Jessica 
Sixth Grade Math
A car driving crosscountry traveled 180 miles in 4 hours. At this rate of speed, how many miles further will the car travel in the next 3 hours? My answer is 135 miles. Is my answer correct?
asked by Stephon 
chemistrychemical equations
How do I write the balanced chemical equation for Copper +nitric acid > copper(II)nitrate+ nitrogen dioxide + water
asked by Anonymous 
CHEM
1.) What is the correct net cell reaction for the electrochemical cell diagramed below? Ni(s) ∣ Ni2+(aq)  Ag+(aq) ∣ Ag(s) a.) Ag+(aq) + Ni(s) > Ag(s) + Ni2+(aq) b.) Ag(s) + Ni2+(aq) > Ag+(aq) + Ni(s) c.) 2Ag+(aq) + Ni(s) > 2 Ag(s) + Ni2+(aq)
asked by Amber 
Gowng
The speen of a bullet of mass 20g in 216km/s what is kinetic energy
asked by Shedrack 
math
the ratio of boys to girls on the bus is 20/15. what are three ratio equivalents.
asked by jordon 
Calculus,reaction rates
A car starting at 12:00 noon travels west at a speed of 30 kph. Another car starting from the same point at 2:00 PM travels north at 45 kph. Find how fast the two are separating at 4:00 PM?
asked by @jayr 
@Vanessa: Re: Comm/215
I deleted your original questions and answers. Here are my responses. Comm/215  Ms. Sue, Sunday, November 30, 2014 at 4:45pm I've checked the first 10 and they are all right. Is # 11 a comma splice? If I have time, I'll come back and check more of your
asked by Ms. Sue 
Physical Education
What traditions have grown around baseball?
asked by Just Wondering 
check my science hw please.
18. Which of the following would be a cost of drilling for oil in Antarctica? A. The supply of heating fuel would be increased. B.There would be a greater opportunity to study wildlife there. C. An oil spill could harm food sources for penguins. D. Many
asked by Sam 
chemical equations
How do I write the chemical equation for Copper(II)nitrate + sodium hydroxide > Copper(II)hydroxide + sodium nitrate? CuNO3 + NaOH> CuOH + Na(NO3) is that right? Copper(II)hydroxide > Copper(II)oxide + water CuOH > CuO + H2O?
asked by Anonymous 
SIXTH GRADE MATH
The ratio of boys to girls at a day care cent is 5 to 4. Which of the following cannot be the total number of children at the center? A. 27 children B. 54 children C. 60 children D. 72 children Is the answer 60. The reason I chose 60 children is because
asked by Stephon 
Calculus with Diffrential Equations: Pleease help?
Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = 1/15T+5 15T + 5. a) Supposes that T(0)
asked by Bridget 
business
New Orleans’s Mt. Sinai Hospital is a large, private, 600bed facility complete with laboratories, operating rooms, and Xray equipment. In seeking to increase revenues, Mt.Sinai’s administration has decided to make a 90bedadditiononaportionofadjacent
asked by business 
English (Urgent)
In John Cheever's story reunion, what do the restaurants symbolize. Why does Charlie call hi father daddy at the end of the story? Examine the first and last sentences of the story. What is common and why? How do you interpret the ending of the story? Does
asked by Aly 
Calculus
Suppose that represents the temperature of a cup of coffee set out in a room, where T is expressed in degrees Fahrenheit and t in minutes. A physical principle known as Newton’s Law of Cooling tells us that dT/dt = 1/15T+5 15T + 5. a) Supposes that T(0)
asked by Bridget 
English
similarities and differences between lady macbeth and juliet
asked by Rais 
math
Sean has 8inch pieces of toy train track and Ruth has 18inches of train track. How many of each piece would each child need to build tracks that are equal in length?
asked by Anonymous 
Chemistry
What volume of H2 gas (in liters), measured at 23 °C and 678 torr, can be obtained by reacting 7.59 g of zinc metal with 124 mL of 0.302 M HCl? Zn + 2HCl > ZnCl2 + H2
asked by KJ 
check my science hw please.
31. Which of the following is an example of a global environmental choice? A. a student deciding to ride a bicycle to school B. a family deciding to recycle their newspapers C. a town meeting about a new nature refuge. D. nations meeting to discuss the
asked by Sam 
Math
In a math contest of 10 problems, 5 points was given for each correct answer and 2 points was deducted for each incorrect answer. If Nancy did all 10 problems ad scored 29 points, how many correct answers did she have?
asked by M 
Calculus (Cross Section) again
A half of a pepperoni stick is 10 cm long. Assume that a cross section perpendicular to the axis of the pepperoni at a distance x from the end if a circle of radius rad(3x). What is the volume of the pepperoni
asked by Trinh 
physics
A 35kg lawnmower starts from rest. Its pushed with a force of 127N at an angle 40 degrees below horizontal. After 12s it reaches speed of 0.37m/s. Find acceleration and force of friction. Attempts: Well I figured out Fnormal=343 my multiplying mass by
asked by jamie 
physics
Atoms in a solid are not stationary, but vibrate about their equilibrium positions. Typically, the frequency of vibration is about f = 4.55 x 1012 Hz, and the amplitude is about 2.69 x 1011 m. For a typical atom, what is its (a) maximum speed and (b)
asked by Nick 
physics
with what speed does a hammer dropped from a height of 23 m strike the ground?
asked by Leah 
Spanish Help
Si yo _________ (omitir) algo en esta carta, lo siento. a.omitimos b.omiten c.omito d.omites I know omitir means skip, and I know what the sentence says. I wanted to know if anyone could find me anything helpful when it comes to IR verbs? I do not get the
asked by Katt<3Bobby 
science
10. One group of gases that is responsible for destroying ozone in the ozone layer is A.car exhaust fumes B.CFCs C.nitrogen oxides and sulfur oxides D. Carbon monoxide and carbon dioxide I got B for my answer.
asked by Sam 
Physics
A 4.26 kg block starts up a 33.0 degree incline at 7.81 m/s. How far will it slide if the coefficient of kinetic friction is 0.23?
asked by Jennifer 
Physics
A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center?
asked by Mike 
Physics
A puck (uniform disk) of mass m and radius r is travelingat a speed v on frictionless ice. It strikes a second identical puck a glancing blow (at point P) and sticks to it (using VelcroTM). After the collision, the twopuckobject rotates with angular
asked by Alex 
Math Stats
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:
asked by STATS 3 
check my science hw please.
25. All of the following factors affect an area's biodiversity EXCEPT A. areas B.number of endangered species C. climate D. diversity of niches. I got C for my answer.
asked by Sam 
check my science hw please.
26. In the last few centuries, the number of species becoming extinct on Earth has A.decreased dramatically B. decreased slightly. C. increased slightly. D.increased dramatically I think it should be C.
asked by Sam 
Chemistry
A) if you added 8g of ammonium nitrate to 25mL of room temperature water, what would be the temperature in °C?
asked by J 
Chemistry
1. Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br− and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may
asked by Mcmaster university 
statistics
An air gap exists between fluids in a bottle and the cap of the bottle. At a firm producing olive oil, the gap is critical to the shelf life of their product. If the recent information reveals that the average gap is 9.46 mm with a standard deviation of
asked by Deeptimaan 
chemistry
A 0.205 g sample of impure NaOH requires 17.5 mL of 0.2180 M HCl for neutralization. What is the percent of NaOH in the sample, by weight?
asked by Kate 
AP Calculus
Find all points on the graph of f(x)=x^3+3x^22 where there is a horizontal tangent line.
asked by Sarah 
band essay?
I have to write an essay on why I deserve a scholarship for our band class trip to Puerto Rico, I was wondering what English teachers would be looking at/for in this essay and how long it should roughly be
asked by Anonymous 
Physical Science
Complete and balance the equation for the following singlereplacement reactions. (Use the lowest possible coefficients. Omit statesofmatter from your answer.) Ni + Cu(NO3)2(aq)>
asked by Darrel 
Calculus
For which of these functions f(x) does limit as x approaches negative infinity f(x)=2 A. (x2)/(3x5) B. 2x/sqrt(x2) C. (2x^26x+1)/(1+x^2) D. (2x1)/(x^2+1) E. None of these
asked by Anonymous 
physics
a car is running at 50 mph when the driver starts to step at the breaks. if the car decelerates at the rate of 7 ms^2, how long does it take the car stop?
asked by ynah 
physics
How much work is required to extend an exercise spring 15cm if the spring constant is 800N/m?
asked by Leah 
Biochem
I did a titiration expriment and I need to work out how much Hcl is in the sample (NaOH). The expriment was testing the rate of ester hydrolysis . I was wondering if the the amount of Hcl present is the same as NaOH added due to the equivalence of the acid
asked by annnnnnnnnnnnnnnnnn 
SIXTH GRADE MATH
The staff of the Westpoint Public Library signed up 6 volunteers in the last 21 days. If the library staff continues to sign up volunteers at this rate, how many new volunteers will they get in the next 7day week? 2 volunteers is my answer. Is my answer
asked by Stephon 
Calculus (cross section)
A solid has a base bounded by x^2_y^2=36. Find the volume of the solid if every plane section perpendicular to the diameter is an isosceles triangle whose base is on the circle and whose height is 4 units
asked by Trinh 
math
Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if five cards are selected from a set of nine Tarot cards?
asked by libby 
Calculus
Find an equation of the tangent line to the graph of x^2+3y^2=4 at the point (1,1) A. y+1=1/3(x+1) B. y1=x/3y(x1) C. x+3y=2 D. y1=1/3(x1) E. None of these
asked by Anonymous 
math
the ratio of girls to boys in the chorus is 3:2. If there are 50 students in chorus, how many boys are there and how many girls?
asked by terry 
statistics
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours aday? b) In a random sample of 10 babies of
asked by adriana 
MATH
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence interval. Here is the information:
asked by LADO 
Chemistry
To 1.0 ml of 1.5%NaCl, water is added to a final volume of 100ml. What is the molarity NaCl of this final solution? 1.5g/100ml I do not know where to go from here?
asked by Samantha 
chem
A weak acid, HA, has an ionization constant of 9.29 x 106. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?
asked by jess 
English Poetry(response to writeacher)
The theme is the theme is thoughts of elderly? And that there is only one life to live so live it well? This poem seems confusing.. it is either really easy and literal or metaphoric.. I need to write a paper on the atmosphere of this poem and I think the
asked by Bethany 
Math
Carl needs estimate the quotient 547 divideted by 92 explain how Carl could use compatible numbers to make a reasonable estimate
asked by Estimate quotients 
physics
A simple harmonic oscillator consists of a block of mass 1.20 kg attached to a spring of spring constant 190 N/m. When t = 1.80 s, the position and velocity of the block are x = 0.124 m and v = 3.190 m/s. (a) What is the amplitude of the oscillations? What
asked by kelly 
physics
The acceleration of gravity is 9.8 m/s 2 . What is the magnitude of the total force on a(n) 87 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 41 m/s in 5.3 s? Answer in units of kN
asked by jo 
Calculus
Find dy/dx for y=sin(x+y) A. 0 B. (cos(x+y))/(1cos(x+y) C. cos(x+y) D. 1 E. None of these I know I'm supposed to use implicit differentiation but I'm not sure how to go about it with sin
asked by Anonymous 
Calculus
Find f'(x) if f(x)=sin^3(4x) A. 4cos^3(4x) B. 3sin^2(4x)cos(4x) C. cos^3(4x) D. 12sin^2(4x)cos(4x) E. None of these I got D using the chain rule?
asked by Anonymous 
calculus
The number of U.S. citizens 65 and older from 1990 through 2050 is estimated to be growing at the rate of, R(t)=0.063t^2 0.48t+3.87, (0 less than or = t less than or = 15) million people/decade, where t is measured in decades and t = 0 corresponds to
asked by mar 
physics
An unknown mass of a certain solid, initially at 60⁰C, is heated at a uniform at a uniform rate. After 4.0 min the solid reaches its melting point of 80⁰C, and it remains at that temperature for 3.0 min until completely melted. After a further 6.0 min
asked by Alicia 
English
Comparisons between Lady Macbeth and Juliet + some quotes to explain the comparisons
asked by Hifza 
PROPORTION  MATHS
In a Map a distance of 50KM between two places A and B represented by 4m. What will be the actual distance between A and C, represented on the map considered as 7cm? 50:4 :: 7:x 50x : 4 X 7 x = 4 X 7 / 50 = 7/12.5 Please varify this question.
asked by niya 
Math
1. A town has a population of 100,000 now and the population is increasing 10% every year. What will be the population in 5 years? 2. How many poles will be in a pile of telephone poles if there are 30 in the bottom layer, 29 in the second, and so on,
asked by Hershey 
Chemistry
Bromine has two naturally occurring isotopes, the first of which is 79Br with a mass of 78.904 amu and an abundance of 50.54%. Calculate the mass of the other isotope.
asked by Louise 
CALC 1
Suppose that h is a function with h'(x) = xe^x. Find all intervals where the function h is concave up. Now, I understand that concavity is determined by the second derivative, so what my question here is, is it just taking the first derivative and then
asked by Brian 
Chemistry
I'm looking for a video of a chemical reaction that can help me answer these questions What are the names of the reactants and products and their states @ room temperature? What type of reaction is it?
asked by Anonymous 
physics
Ben uses a parachute, to fall to the ground at a safe, steady speed. Discuss the energy transfers, which allow ben and his parachute, to drop at a steady speed.
asked by olivia 
introductory chemistry essentials
A 3.5 Liter sample of 5.8 M NaCL solution is diluted to 55 Liter. What is the molarity of the new solution?
asked by Anonymous 
Calculus
Find limit as x approaches 1 5/(x1)^2 A. 0 B. Negative infinity C. 5/4 D. Infinity If I use limit as h approaches 0 f(x+h)f(x)/h , will I get an x in the answer?
asked by Anonymous 
check my science hw please.
30. Laws can help endangered species by prohibiting A. Captive breeding B.habitat preservation C diversity of genes D. products made from the species I got D, I have a feeling that this may be wrong.
asked by Sam 
Chemistry
how many grams of ammonium nitrate would you have to add to 25mL of room temperature water to get 36°F?
asked by Jay 
Calculus
If f(x)=sin(2x), find f"(x) A. 2cos(2x) B. 4sin(2x) C. 2sin(2x) D. 4sinx E. None of these Is it B from using chain rules?
asked by Anonymous 
chemistry
chemical reactions type?
asked by jose 
ApWorld history
Would Arabic becoming an important language count as a change to the spread of islam in a ccot essay
asked by Anonymous 
trigo
a peak is sighted at an angle of 27 degree 45 min. 1000ft nearer its angle of elevation is 31 degree 30 min.find the height of the peak
asked by chel 
Calc
Find the linearization of f(x)=cos(x)sin(2x) at x = 0.
asked by Fred 
Biology
Genome A 5GCAGGCCATATAAAATAGCGCCATACTAGATACGGG CCATATTATTGCATATCCGCCGATTACAGGATTTAATTT GGGAATTCCCCGATTAACGCGATCGATCGGGCCATATC GATATGCATCGTAATCCGGTAGATTCACAGGTAG 3 Genome B 5GCATACCCAAATTAATAACGGCGGTAGGCGACTCATT CTGATATACGCATCGGCATTTACCTACGGCCGGCCGGC
asked by Jessica 
Physics
A 50 kg cart rests on frictionless surface. A net force of 75 N acts on the carts over a distance of 2m. What maximum speed does the cart reach? Work: I can figure that the acceleration is 1.5m/s/s, Vi= 0. I was thinking maybe if I found time through the
asked by Sam 
ApWorld history
How did religion stay the same throughout the spread of islam in west Africa in circa 800 C.E. and circa 1750
asked by Anonymous 
Calculus
Find the derivative of x^2f(x) A. x[xf'(x)+2f(x)] B. 2xf'(x) C. x[xf'(x) +2f'(x)] D. x^2f'(x) E. None of these
asked by Anonymous 
Math
1. If 100 is saved on October 1, 150 on October 2, 200 on October 3, and so on, how much is saved during October? 2. A PingPong ball is dropped from a height of 16 ft and always rebounds 1/4 of the distance of the previous fall. a. What distance does it
asked by Hershey 
Math
A town has 4900 registered voters, each of whom is either a Republican, a Democrat or an Independent. In the last primary election, 1150 people voted, and the number of Republicans who voted was 720 fewer than 30% of the total number of Democrats plus
asked by Kyle 
English
1. If he be brave, he will try it again. 2. If he is brave, he will try it again. 3. If it rain tomorrow, I will not start. 4. If it rains tomorrow, I will not start.  Are they all grammcatical?
asked by rfvv 
chemistry
Sodium vapor lamps are used in Chicago to light city streets. The light emitted (given off) by these lamps has a λ of 5.9 x 107 m. What is the λ in cm? What is the λ in nanometers (nm) [1 meter = 1 x 109 nm]? What is the ν of this radiation? In what
asked by mathew 
geometry
Having a very hard time. Can someone please help. Im trying to find how many sides a polygon has if, the difference of the interior and exterior angles is 100 degrees?
asked by Brandi 
Calculus
Find dy/dx if x^2+y^2=2xy A. x/(xy) B. (y+x)/(yx) C. 1 D. x/y E. None of these
asked by Anon 
Math
b_n=(2)^(n1)
asked by Edward 
check my science hw please.
24. can provide an economic benefit to A. drug companies B. tourists C.hikers D.endangered species I got A for my answer.
asked by Sam 
trigonometry
calculate the linear velocity of an object rotating at an angular velocity "w" at distance "r" from the center . express the answer in centimeter per second. 1.r=10cm; w=20πrad/second 2.r=5cm; w=20πrad/second 3.r=12cm; w=25πrad/second 4.r=30cm;
asked by deyanz 
trigonometry
please help me to solve this problem: calculate the angular velocity of a point for the given number of revolutions and time. express the answer on in radians per minute. 1.θ=1/2;t=2min. 2.θ=1/4;t=5min. 3.θ=2/3;t=10min. 4.θ=3/5;t=12min.
asked by deyanz 
Algebra
What is the probability of obtaining tails and a sis?
asked by Maxine 
Calculus
Determine the limit as x approaches 1 f(x) if f(x)={3x, x does not equal 1 and 1, x=1 A. 2 B. 1 C. 3/2 D. DNE E. None of these
asked by Anonymous 
marketing
The types of companies compete in the global marketplace: (1) international firms, (2) multinational firms, and (3) transnational firms. All three employ people in different countries, and many have administrative, marketing, and manufacturing operations
asked by nafees 
Calculus
Find f'(x) for f(x)=(2x^2+5)^7 A. 7(4x)^6 B. 7(4x)^7 C. 28x(2x^2+5)^7 D. 7(2x^2+5)^6 E. None of these Would it be none of these because of the 4x in the chain rule?
asked by Anonymous 
Calculus
Find dy/dx if x^2+y^2=2xy A. x/(xy) B. (y+x)/(yx) C. 1 D. x/y E. None of these Do I equal it to 0 and use implicit rule?
asked by Anonymous 
algerbra
logarithmic form of: 4y=64
asked by darlene 
Math
A game is played by throwing darts at a target. A player can choose to throw two or three darts. Darcy plays two games. In Game 1, he chooses to throw two darts, and wins if he hits the target at least once. In Game 2, he chooses to throw three darts, and
asked by Anonymous 
Calulus
Find f'(x): f(x)=(x^23x)/x^2 A. 2x3/x^2 B. 2x3/2x C. 1(3/x) D. 3/x^2 E. None of these I can put it into the division rule for the derivative but get confused when I'm simplifying.
asked by Anonymous 
Calculus
Find limit as x approaches 1 (x^2+2x+3)/(x^2+1) A. 0 B. 1 C. Infinity D. DNE E. None of these
asked by Anonymous 
Calculus
Find the derivative for f(x)=x^2+x Do I put the x^2 as a denominator? How would I solve it if that's what I'm supposed to do?
asked by Anonymous 
Calculus
Find the limit as x approaches 1 5/(x1)^2 I don't understand how to solve it because there would be a 0 on the denominator.
asked by Anonymous 
Calculus
If f(x) = {x^2+3x1, x
asked by Anonymous 
Calculus
If f(x) = {x^2+3x1, x
asked by Anonymous 
ap calc
what is 2+2
asked by Bro 
Calculus
Find limit as x approaches 5 (x^23x10)/(x5) A. 2 B. DNE C. 0 D. 7 E. None of these
asked by Anonymous 
biochem
How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .
asked by becky 
AP calculus
Find values for x and/or y on the graph of x^22y^2+9x+8y276=0 for which there is a vertical tangent line
asked by DJjazzyjazz 
Calculus
Find an equation of the tangent line to the graph of f(x)=xsinx when x=0. A. y=0 B. f'(x)=0 C. y=xcosx+sinx D. y=x E. None of these
asked by Anonymous 
trig
Two circles of radii 5 and 3 cm, respectively, intersect at two points. At either point of intersection, the tangent lines to the circles form a 60◦ angle, as in Figure 2.2.4 above. Find the distance between the centers of the circles
asked by Anonymous 
Math
if f(x) = 2x^2+4 and g(x)=x3 which number satisfies f(x)= (f o g)(x) A) 3/2 B) 3/4 C) 5 D) 4 I am positive that answer A is correct, i just cant get the work to prove it, i can disprove all other answers and my teacher has assured me i am on the right
asked by Katie 
physics
a body moving at 40 m/s accelerates at the rate of 8m/s^2. what is the distance it transverses in 15 seconds?
asked by ynah 
Trigononometry and plaine sperical
Find the exact values of the six trigonometric functions for each of the following angles.draw the angles in standard position 1.300 degree
asked by Jomar castillo 
Calculus
Find d^2y/dx^2 for y=(x+3)/(x1) A. 0 B. y=8/(x1)3 C. y=4/(x1)^3 D. y=8/(x1)^3 E. None of these I got a positive number but am not sure about the denominator in the second derivative.
asked by Anonymous 
Math
1. If 100 is saved on October 1, 150 on October 2, 200 on October 3, and so on, how much is saved during October? 2. A PingPong ball is dropped from a height of 16 ft and always rebounds 1/4 of the distance of the previous fall. a. What distance does it
asked by Hershey 
Calculus
Which of the following describes the graph of y=2x+6? A. Only continuous B. Only differentiable C. Both A and B D. Not continuous, not differentiable E. Constant
asked by Anon 
Algebra
(7.8*10 to the 12th power)*800=(7.8*10 to the 10th power)*80,000 Directions:tell whether each equation is true or false. if false, write the inequality in like terms I don't remember how to start multiplying.
asked by Bob 
Calculus
If f(1)=4 and f'(1)=2, find an equation of the tangent line at x=1 A. y=2x+2 B. y=2x2 C. y=4x7 D. y=4x2 E. None of these
asked by Anonymous 
Math
ABC *AA Ans: AC6C Find ABC values?
asked by Kamalakshi 
math
A prism has a base which is a right triangle with legs, 16mm and 12 mm
asked by sawsdas 
AP Calculus
Find f'(x): f(x)=(x^23x)/x^2 A. 2x3/x^2 B. 2x3/2x C. 1(3/x) D. 3/x^2 E. None of these I get confused on the simplifying part.
asked by Anon 
physics
When a 1.50 kg block is 3.96 m above the base of the hill, the mass has a speed of 1.71 m/s. When the block reaches a point 0.750 m above the base of the hill, what is its kinetic energy?
asked by Steve 
Calculus
Find limit as x approaches 1 (x^2+2x+3)/(x^2+1) A. 0 B. 1 C. Infinity D. DNE E. None of these
asked by Anonymous 
Physics
You may have observed that a car with windows closed sitting under the sun on a hot day, can get extremely hot in the interior, even hotter than the outside air. Explain this in terms of heat and temperature concepts. How is this similar to greenhouse
asked by Hershey 
AP Calculus
Find the derivative for f(x)=x^2+x Do I put x^2 on the denominator? How would I solve it if that's the case?
asked by Sarah 
Religion/ Social Studies/ Science
Please, someone tell me who was it that made the world. Thank you.
asked by sharkeesha 
Calculus
Find limit as x approaches 5 (x^23x10)/(x5)
asked by Anonymous 
statistics
A company has been studying the performance of their sales department. The measure of performance used is: average monthly sales amount in dollars. For the past 12 months, the average monthly sales amount has been $4,532 with a standard deviation of $386.
asked by Deeptimaan 
physics
A robot arm expends 15J of work to extend a spring 10cm from its equilibrium position. How much force is required?
asked by Leah 
English
How to find a keywords of the quote our deepest fear
asked by Anonymous 
government
. In Griswold v. Connecticut, the Supreme Court was considered an activist court because... I know that it has everything to do with the privacy law. I am stuck between two answer from the multiple choice. please help.
asked by Sunflower 
physics
a projectile has a maximum range R=150m.find its initial velocity and the corresponding maximum height it reaches. at what angle should it be aimed to hit a target at the same level that is located at a distance x=100m from it?
asked by ali 
physics
an object moves horizontally with a velocity v=20m/s with constant acceleration a=2m/ss.how faar does it move before its velocity is doubled?
asked by ali 
chemistry
Determine how many milliliters of 0.310 M HClO4 will be required to neutralize 52.37g Ca(OH)2 according to the reaction: 2HClO4 + Ca(OH)2 > Ca(ClO4)2 + 2 H2O
asked by B 
What is the best estimate of the population mean?
The Jolliebee hamburger chain specializes in halfpound hamburgers. The sales follow a normal distribution. The standard deviation of the distribution for daily sakes is $3000. A sample of 40 showed the mean daily sale to be $20,000. What is the best
asked by Jennifer 
physics
A river is flowing along the east direction with a velocity of 10km/hr. A person heads towards north with a velocity of 2km/hr. what is the velocity of the person with respect to ground?
asked by shreya 
precal
Find the height of a ball after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet.
asked by Anonymous 
AP calc
. If f(x) = {x^2+3x1, x
asked by Anon 
math
Find the height of a ball after 3 seconds, if the ball is hit with an initial velocity of 90 feet per second at an angle of 60 degrees from an initial height of 5 feet.
asked by Anonymous 
physics
A dude is spinning a 1.0 kg mass on the end of a 1.5 meter string. He gets it spinning at a constant rate of 4.0 rev/sec. The string breaks such that the mass is thrown into projectile motion with an initial angle of 45° to the ground (assume that it is
asked by hicham 
percentages
a tree is 1.5 m tall after a year it increase its height by 12% after another year it by a further 14% what is the percentage change
asked by anyomonous 
Math
Robyn and Shruti both run on the cross country team. Robyn runs 2 miles every day. Shruti starts her week with a 3mile run and runs 1 mile every day, even on the day she runs the 3 miles. If M is the number of miles run during the week, and d id the
asked by Jamar 
Chemistry Correction
Hi, I'm trying to solve for the radius of the sphere. This is the correct steps: 8.27*10^29 = 4/3 pi * r^3 r^3 = 2.0225 * 10^29 cu meters When I do 8.27x10^29 / 4/3 pi, I don't get the answer 2.0225x10^29 Can you tell me what I'm doing wrong?
asked by Nancy 
AP Calculus
For which of these functions f(x) does limit as x approaches negative infinity f(x)=2 A. (x2)/(3x5) B. 2x/sqrt(x2) C. (2x^26x+1)/(1+x^2) D. (2x1)/(x^2+1) E. None of these
asked by Sarah 
math
Evaluate the expression. 11! 6! 4! 2! 3! 1!
asked by libby 
English
1. I heard the news at first hand. 2. I heard the news at second hand. 11. I heard the news directly. 22. I heard the news indirectly.  Are they interchangeable? What is the meaning of 'hand' in the sentences?
asked by rfvv 
Calculus
Find the equation of the line that passes through (1,3) and is perpendicular to the line 2x+3y+5=0 A. 3x2y+3=0 B. 2x+3y11=0 C. 2x+3y9=0 D. 3x2y7=0 E. None of these I got E?
asked by Anonymous 
CHEMISTRY HELP
what are the diff b/in: 12. Dilute to and dilute with 13. Warm, boil 14. Heat almost to boiling 15. Heat just to boiling 16. Evaporate to 17. Evaporate to almost dryness 18. Concentrate the volume to 12. I know the meaning of dilute its reducing the
asked by Yeng 
geography
How did the geographers decide the 6main cultures
asked by Christal 
AP Calculus
Let f(7)=0, f'(7)=14, g(7)=1, g'(7)=1/7. Find h'(7) if h(x)=f(x)/g(x)
asked by Sarah 
Calculus
The slope of the line tangent to the curve xy+(y+1)^2=6 at the point (2, 1) is
asked by James 
Calculus
Find the limit as x approaches 0 [(sqrt(x+9))3]/x A. 0 B. 1 C. Infinity D. 1/3 E. None of these
asked by Anonymous 
Chemistry
The addition of a crystal of sodium chlorate to a sodium chlorate solution containing no undissolved solute causes additional crystals of sodium chlorate to precipitate. The original solution was supersaturated or unsaturated
asked by Ang 
Help with differential eqs problem???? (Calculus)
Consider the differential equation dy/dt=yt a) Determine whether the following functions are solutions to the given differential equation. y(t) = t + 1 + 2e^t y(t) = t + 1 y(t) = t + 2 b) When you weigh bananas in a scale at the grocery store, the height
asked by Stacey 
Calculus
If f(x)=x^2+1 and g(x)=2x1, find d/dx[f'(g(x))] at x=1 A. 2 B. 6 C. 4 D. 0 E. None of these
asked by Anon 
statistics
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution with the standard deviation of 1.6 a) is it unusual for a baby to sleep under 12 hours a day? b) In a random sample of 10 babies of
asked by adriana 
Calculus
Find the derivative: f(x)=1/cubed root(3x^3) A. 1/3(3x^3)^4/3 B. x^2/(3x^3)^4/3 C. x^2/(3x^3)^2/3 D. x^2/(3x^3)^4/3 E. None of these
asked by Anonymous 
biochem
How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab writeup for tomorrow .
asked by Becky 
Math
A triangular region is bound by the three lines 2x+y12=0, y=3x3, and y=1/7x81/7. What is the circumcentre of this triangle? I can find the answer using a graph, but I don't know the formula to find the mid segments of the lines.
asked by Annabeth 
Statistics
A recent study of US children under 11 years old found that they spend on average 142 minutes a day watching tv. Assuming normal distribution with the standard deviation of 44 minutes, answer the following. A) what percent of children of this age spends
asked by Junior 
biochem
How can I convert a rate constant from mol to t/M.I have 0.00012 mol of AcH present at 5min .Know I want to calculate the concentration at this time ( [AcH]t / M ) . How would I work this out .Please help this is for a lab write up for tomorrow .
asked by Becky 
AP Calculus
Find limit as x approaches 1 5/(x1)^2 A. 0 B. Negative infinity C. 5/4 D. Infinity E. None of these
asked by Anon 
falaq
Assalamualaikum Muslim experts in falaq have produced salat timetables for the convenience of the ummah. a.Naturally they would have certain error margins.If, say for example the error is about 2 minutes. The time for asr is 430 pm. Is it then possible to
asked by nadira 
Geometry
Draw a pentagon shaped courthouse, it must be painted. Each wall of the courthouse is 80ft by 18ft. Problem:
asked by Kiara 
chem
The Ka of an acid is 6.3 x 108. To the nearest one hundredth, what is its pKa
asked by jess 
Chemistry
5.) Which of the following is the strongest oxidizing agent? a.) Zn(s) b.) Mg(s) c.) Al3+(aq) d.) Mg2+(aq)
asked by Anonymous 
social studies
in Greek education why is it beneficial to educate all children in a civilization? why is it important to educate the population in a democracy?
asked by Daniela 
ENGLISH 9 hunger games
How was recreation in the capital and the district different from each other full sentences please!!
asked by Billo 
calc
evaluate the surface integral double integral (y dS) z= 2/3 (x^3/2 + y^3/2) 0 ≤ x ≤ 5, 0 ≤ y ≤ 2
asked by sara 
science
what is pollution
asked by Anonymous 
algebra
Develop a tree diagram for tossing two, eightsided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.
asked by larry 
english
can you please continue this sentence.. "Love is like a cinema" i needed this to write a good theme for my project in literature..
asked by Yeng 
physics
How much heat (in kJ) will it take to bring 56 kg of ice at 8°C to dry steam? Answer to 3 significant figures
asked by Anonymous