Questions Asked on
April 2, 2014

Calculus Help Please!!!
A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. after 1 s = after 3 s = after 7 s =
asked by Tim 
Physics  check answers please
1. A boy pushes a car to slow it down while the car is rolling horizontally down the road. If the boy pushes backwards on the car with 10N of force as the car rolls forward 3.0m, the amount of work done by the boy is: a)30 b)0 c)3.3 J d)30 N•m e)300J my
asked by Jessica 
Calculus Help Please
let f(x)=(x1)^2, g(x)=e^(2x), and h(x)=1+ ln(12x) find linearization of f, g, and h at a=0 Lf(x)= Lg(x)= Lh(x)= graph f,g, and h, and their linear app. For which function is the linear app. best? for which is the worst? explain. the linear app. appears
asked by Ahmed 
business Math
Lane French had a bad credit rating and went to a local cash center. He took out a $100 loan payable in two weeks at $115. What is the percent of interest paid on this loan? (Do not round intermediate calculations. Round your answer to the nearest whole
asked by marie 
calculus help thanks!
The gas law for an ideal gas at absolute temperature T (in kelvins), pressure P (in atmospheres), and volume V (in liters) is PV = nRT, where n is the number of moles of the gas and R = 0.0821 is the gas constant. Suppose that, at a certain instant, P =
asked by Pal 
business mat
Carol Miller went to Europe and forgot to pay her $740 mortgage payment on her New Hampshire ski house. For her 59 days overdue on her payment, the bank charged her a penalty of $15. What was the rate of interest charged by the bank?
asked by marie 
Algebra II
A rowing team rowed 50 miles while going with the current in the same amount of time as it took to row 25 miles going against the current. The rate of the current was 2 miles per hour. Find the rate of the rowing team in still water.
asked by Brice 
Calculus Help Please!!! Check
When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has increased to 10°C. (Round the answers to two decimal place.) (a) What is the temperature of the drink after 60 minutes? (b) When
asked by Tenshi 
UCF
What will be the change in enthalpy when 100.0 g of butane, C4H10, is burned in oxygen as shown in the thermochemical equation below? 2 C4H10(l) + 13 O2(g) → 8 CO2(g) + 10 H2O(g) ΔH = −5271 kJ −2636 kJ −4534 kJ −9087 kJ −1.817 × 104 kJ
asked by Alex 
Physics
I already figured out the answers to some but I need help with two more. 1) A disk with an initial angular velocity ω0 = 4.5 rad/s experiences a constant angular acceleration of α = 7.5 rad/s2 for time t = 15 s. Please answer the following questions. ω0
asked by Michelle 
Math
The entrance hall to the Louvre Museum in Paris is a glass and metal pyramid with a surface area of approximately 1980 square on each side . The base of the pyramid is a square that is 35.4 meters on each side. What is the slant height of the pyramid ?
asked by Bob 
Business Math
Joanne and Ed Greenwood built a new barn with an attached arena. To finance the loan, they paid $1,307 interest on $45,000 at 4.0%. What was the time, using exact interest? (Do not round intermediate calculations. Round up your answer to the nearest day.)
asked by marie 
chemistry
"Write equations for the halfreactions that occur at the anode and cathode for the electrolysis of the following aqueous solution: CuBr2(aq)" Possible oxidation reactions: 1. 2Br > Br2 + 2e = 1.09 2. 2H2O > O2 + 4H+ + 4e = 1.23 Possible reduction
asked by Kate 
algebra
Suppose that the weight (in pounds) of an airplane is a linear function of the total amount of fuel (in gallons) in its tank. When graphed, the function gives a line with a slope of 6.2. With 52 gallons of fuel in its tank, the airplane has a weight of
asked by kent 
Equation help 2 questions
How many real number solutions does the equation have y=4x^2+7x8 none one two infinite How many real number solutions does the equation have y=3x^2+18x+27 none one two infinite Thank you!
asked by Alex 
Math (check answer)
1.never the difference of two positive integers is _____ negative. A.always B.sometimes C.never
asked by matt 
Reading Skills
This question is based on the following four sentences. 1. Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free trade. 3. Netta and Jim were sharply split over the issue of free trade. 4. Netta and Jim refused
asked by Emily 
physics
The mass of an iron cube having an edge length 1.8 cm is 70 g. Find itd density.
asked by Naeem 
Spanish
Are my answers correct? I had the most trouble with the accents in part II. Thank you. Part I Llene los espacios en blanco con la forma correcta del verbo en la forma del presente progresivo utilizando el verbo ESTAR con el gerundio. 1. Sé que vosotras no
asked by Anna 
Probability
A defective coin minting machine produces coins whose probability of Heads is a random variable Q with PDF fQ(q)={3q2,0,if q∈[0,1],otherwise. A coin produced by this machine is tossed repeatedly, with successive tosses assumed to be independent. Let A be
asked by A 
Science (chemistry)
Write a balanced chemical equation and state the reaction type for each of the following reactions: a.) nitrogen gas reacts with hydrogen gas forming ammonia (NH3) b.) carbonic acid breaks down to form carbon dioxide gas and water c.) aluminum foil reacts
asked by Anonymous 
Chemistry help
Sulfur trioxide is formed by the catalytic oxidation of sulfur dioxide: 2SO2(g)+O2(g)→2SO3(g) If ΔH∘= 197.8kJ/mol and ΔS∘= 188.0J/K , what is ΔStotal for this reaction? Is the reaction spontaneous under standardstate conditions at 25 ∘C?
asked by Emily 
Chemistry
If the activation energy for a given compound is found to be 42.0 kJ/mol, with a frequency factor of 8.0 × 1010 s1, what is the rate constant for this reaction at 298 K?
asked by Kelsei 
math
the current ratio of boys to girls at a certain school is 2 to 5 . if 12 additional boys were added to the school, the new ratio of boys to girls would be 4 to 9. how many boys currently attend the school?
asked by Anonymous 
Physics
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 10^3 kg, what is the new altitude it reaches? Take the mass of the Earth to be
asked by Dan 
Chemistry
Write a balanced chemical equation that represents the selfionization of water. (Use the lowest possible coefficients. Include statesofmatter at 1 atm and 25°C in your answer.)
asked by Grace 
calculus
Let C(t) be the total value of US currency (coins and banknotes) in circulation at time. The table gives values of this function from 1980 to 2000, as of September 30, in billions of dollars. Estimate the value of C(1990) . t 1980 1985 1990 1995 2000 C(t)
asked by juli 
Probability
Alice has two coins. The probability of Heads for the first coin is 1/3, and the probability of Heads for the second is 2/3. Other than this difference, the coins are indistinguishable. Alice chooses one of the coins at random and sends it to Bob. The
asked by A 
chemistry
I'm stuck on this problem and only have 2 attempts left. The Ksp of Zn(OH)2 is 1.8x10^14. Find Ecell for the following halfreaction. Zn(OH)2(s) + 2e^ Zn(s) +2OH^(aq) So far I've tried using the following methods, none of which have worked... Ecell =
asked by Jamie 
Algebra II
Ravi is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $75 and allows unlimited mileage. Company B has an initial fee of $55 and charges an additional $0.80 for every
asked by Bryan 
Astronomy
Another star cluster ("star cluster 2") lies 7.4 Megaparsecs from the starship, and has an apparent radius of 6.3 arc seconds. You would like to know how big it is. Is it the same size as galaxies in our universe (i.e. tens of kiloparsecs) or only as big
asked by keitanako 
Math
My pattern is 509, 517, 525, 533, 541. What is the place value to describe how the numbers change?
asked by Gabriel 
Physics
In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??
asked by NoBody 
ChemistryGases
A common laboratory preparation of hydrogen on a small scale uses the reaction of zinc with hydrochloric acid. Zinc chloride is the other product. (a) If 13.0 L of H2 at 765 torr and 20.0 °C is wanted, how many grams of zinc are needed, in theory? (b) If
asked by Anonymous 
Chemistry
Consider a 0.10 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given below, calculate the contributions to [H3O+] from each ionization step. Part 1: Ka1=1.0*10^4 Ka2=1.0*10^5 Part 2: Ka1=1.0*10^4 Ka2=1.0*10^6
asked by Chay 
Physics
In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??
asked by ABCD 
Reading Skills
8. Below is the last stanza of a poem, "Dover Beach," written in 1876 by Matthew Arnold. Ah, love, let us be true To one another! for the world, which seems To lie before us like a land of dreams, So various, so beautiful, so new, Hath really neither joy,
asked by Emily 
Algebra
What is the focus and directrix of the graph: x3y^2=0?
asked by anonymous 
math
Find the foci x^2/49 + y^2/36 = 1
asked by kim 
business mat
On September 14, Jennifer Rick went to Park Bank to borrow $2,500 at formula9.mml interest. Jennifer plans to repay the loan on January 27. Assume the loan is on ordinary interest. (Use Days in a year table.) a. What interest will Jennifer owe on January
asked by marie 
Probability
Let Θ be a Bernoulli random variable that indicates which one of two hypotheses is true, and let P(Θ=1)=p. Under the hypothesis Θ=0, the random variable X is uniformly distributed over the interval [0,1]. Under the alternative hypothesis Θ=1, the PDF
asked by A 
Probability
Let T1,T2,…,Tn be i.i.d. observations, each drawn from a common normal distribution with mean zero. With probability 1/2 this normal distribution has variance 1, and with probability 1/2 it has variance 4. Based on the observed values t1,t2,…,tn, we
asked by A 
math
write a number on each section of a hexagon so that the probability of getting an odd number is 1/3
asked by jes 
Spanish 101
Choose the logical word or words to complete each sentence. 1. A mis hermanos y a mí nos____ aprender verbos nuevos. 1 encanta 2 encantamos 3 encanto 4 encantan I chose answer 2 ecantamos 2. A mi papá ____ molestan los niños traviesos. 1 los 2 me 3 se 4
asked by Ashley 
Equation help
A physics student stands at the top of a hill that has an elevation of 56 meters. he throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the equation y=0.04x^2+1.3x+56
asked by Alex 
Family
What career is more worthy to go to college for and save the most money? A.) Vet Tech B.) Preschool/Kindergarden Teacher C.) Pilot D.) Manager A or B ??
asked by Molly 
Chemistry
Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include statesofmatter at 1 atm and 25unknown_prefixC in your answer.) (a) the dissociation of solid magnesium hydroxide in water
asked by Grace 
math
Suzanne wants to put a fence around her square garden. If the garden covers an area of 100 ft2, how many feet of fencing does she need? (1 point) 20 ft 40 ft 10 ft 400 ft
asked by zuha 
Chemistry
Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include statesofmatter at 1 atm and 25unknown_prefixC in your answer.) (b) the reaction of magnesium metal and hydrobromic acid
asked by Grace 
math
find the median for the given frequency score, x = 1,2,3,4,5,6,7,8,9,10 frequency, f = 1,1,3,3,5,7,5,5,7,1
asked by carol 
Calculus
If y = y(x), write y’ in Leibniz notation.
asked by bex 
Accounting
During the current year, Mast Corporation expects to produce 10,300 units and has budgeted the following: net income $350,376; variable costs $1,080,800; and fixed costs $105,000. It has invested assets of $1,459,900. The company’s budgeted ROI was 24%.
asked by Kristina 
Algebra
The formula r=2sqrt(...)5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70mph?
asked by George 
World Civilizations
Mansa Musa was the ruler of the African kingdom of A. Mali. B. Morocco. C. Egypt. D. Ghana.
asked by Pirurris 
algebra 2
Find the points where these quadratic relations intersect. 16x^25y^2=64, 16x^2+25y^296x=256
asked by Taleigh Glass 
spanish
if someone could help me conjugate these words correctly id really appreciate it!(sorry, I was unable to put accentos) 1. ?Habra alguien que me (comprender)? 2. Querian que tu (ir) a la biblioteca. 3. Tomas fue a la carcel porque (robar)a alguien. 4. Era
asked by devon 
economics
how do you think our nations output should be distributed ? by income?
asked by Anonymous 
slope
What does the line y = 3x  7 look like?
asked by Anonymous 
Physics
Consider the following distribution of objects: a 4.00kg object with its center of gravity at (0, 0) m, a 1.20kg object at (0, 3.00) m, and a 5.40kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of
asked by Joe 
chemistry
0.50 mol of Fe react with 0.60 mol of O2, how many moles of Fe2O3 will form?
asked by matt 
Chemistry quick question
For the following write the chemical formulas for the reactants and predict the most likely reaction type , then write balanced equations for each: A.) magnesium chloride is heated b.) silver nitrate is reacted with sodium sulfide c.) methanol is burned in
asked by Anonymous 
physics college level
A 2.0kg block is projected up a frictionless inclined plane with a speed of 10 m/s. The angle of inclination is 30o . The block goes a distance of _____ up the plane before stopping. Assume g = 10 m/s2
asked by spencer 
math
In a photograph, a man is 1.3cm tall and a flagpole is 4.8cm tall. If the man is 190 cm in real life, how tall is the flagpole, to the nearest centimetre?
asked by kagney 
Reading Skills
This question is based on the following information about The Call of the Wild, a book by Jack London. The Call of the Wild is a story about a dog named Buck. Buck is a pampered dog who lives with a wealthy family in southern California. During the Gold
asked by Emily 
physics
A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 70.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 63.0° and a speed of v2 = 2.10 m/s.
asked by Anonymous 
Reading Skills
This question is based on the following paragraph. (1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught
asked by Emily 
algebra
simplify: 6sqrt7sqrt7 A. 6 sqrt7 B. 5 sqrt 7 C. 5 D. 6 Simplify: 2sqrt12+ sqrt3 A.5sqrt3 B. 3sqrt3 C. 2sqrt15 D. 3sqrt15 Need help on these please
asked by ciara 
Chemistry
please help me balance these equations using the method of half reactions.. Na + HCL = NaCl + H2 Pb + PbO2 + H2SO4 = PbSO4 +H2O Thank you, even a little help is appreciated.
asked by Justin 
speechenglish
derick decided that he would focuse his report on their traditional homes called gers which visual aids are most likely to be helpful 1object2chart 3model4graph5photographs 6video7flipchart
asked by tina 
Chem
A 75.0 mL volume of 0.200 M NH3 (Kb=1.8x10^5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 28.0 mL of HNO3.
asked by Billy Bob Reynolds 
World Civilizations
Although the demand for slaves was great, Angolan and Brazilian merchants only permitted a steady trickle of slaves into Brazil because A. there was anxiety over importing tropical diseases that were rife in West Africa. B. importing too many slaves would
asked by Pirurris 
Algebra Question~!
Suppose you divide a polynomial by a binomial. How do you know if the binomial is a factor of the polynomial? Create a sample problem that has a binomial which IS a factor of the polynomial being divided, and another problem that has a binomial which is
asked by Gabby 
Chemistry
You have a solution of 0.15M Ba(OH)2 and a solution of H2SO4 whose concentration you want to determine. You start with 25 ml H2SO4 in the Erlenmeyer and titrate in the Ba(OH)2. At the end of the titration, you find that you have used 20.4 ml Ba(OH)2 and an
asked by Mike Jones 
trig
Help! Ships A and B leave port at the same time and sail on straight paths making an angle of 60 degrees with each other. HOw far apart are the ships at the end of 1 hour if the speed of ship A is 25 km/h and that of ship B is 15 km/h?
asked by Anonymous 
physics
What linear speed must a 0.0508kg hula hoop have if its total kinetic energy is to be 0.164 J? Assume the hoop rolls on the ground without slipping.
asked by Tsion 
Equations
How many real number solutions does the equation have y=3x^2+18x+27 none one two infinite
asked by Alex 
math
a number of children chose roald dahl multiplied by a number of children who chose C.S Lewis is 735. 14 more chose Jacquline wilson. how many chose Jacquline wilson and how many chose roald dahl
asked by shania 
English
What is 'paps room'?
asked by rfvv 
math
Adam and Bob went apple picking in an orchard. At the end of the day, they realized that if Adam had picked 50 more apples, he would have picked twice as many as Bob picked. On the other hand, if Bob had picked 50 more apples, he would have picked twice as
asked by anna 
englishpoetry
what is a good haiku poem on the school cafeteria?
asked by anonymous 
math
Alvin, Calvin and Melvin each have some positive integer number of sweets. Alvin has fewer sweets than Calvin, and they have 29 sweets in total. Melvin has 26 sweets more than Alvin. What is the maximum number of sweets that they can all have in total?
asked by anna 
English
can you do a poem for me,because i don't know how to do it???
asked by bobi 
computer science
Developing a habit to write good essays and dissertations can bring lots of accolades from faculty to any student. Does that mean each of the children can be expected to do it with similar success? ItÃƒ¢Ã¢â€š¬Ã¢â€ž¢s a bit too much to ask
asked by dissertation writing help 
PRE CALC
The 20th term of an arithmetic sequence is 27 and the first term is 11. What is the common difference??
asked by Aly 
math
A product cost $100, 90% of the price being production cost,the remainder being tax, if the govt raises the tax by 50%, by how much in % will the factory have to reduce its production cost to keep he price still at $100
asked by Anonymous 
business mat
Abe Wolf bought a new kitchen set at Sears. Abe paid off the loan after 60 days with an interest charge of $9. If Sears charges 10% interest. What did Abe pay for the kitchen set? (Use 360 days a year. Do not round intermediate calculations.)
asked by marie 
probability
The vertical coordinate (“height") of an object in free fall is described by an equation of the form x(t)=θ0+θ1t+θ2t2, where θ0, θ1, and θ2 are some parameters and t stands for time. At certain times t1,…,tn, we make noisy observations Y1,…,Yn,
asked by A 
chemistry
G=NEV
asked by Anonymous 
arithmetic
Ana sees a computer that costs $1600. The store manager says next week will be on sale $350 less. What percent will Ana save
asked by Anonymous 
mathematics
equation 2x3y=10 touches the circle with centre m (2,4)
asked by xolani 
Finance
Kim has money in a savings account that earns an annual interest rate of 4.1%, compounded monthly. What is the effective rate of interest on Kim's account? Round to the nearest hundredth of a percent.
asked by Lynn 
add maths
10^2n+3 × 20^n × 5^n Step:? Answer:10^4n+3
asked by mandy 
Math help
1. The number of students present in class & the number of empty chairs Type of correlation: Justification: Independent variable: Dependent variable: 2. Speed of car & distance traveled to complete stop after brakes are applied Type of correlation:
asked by Anonymous 
economics
how to derive marginal utility of income?
asked by geet 
statistics
Since, in general, the longer a car is owned the more miles it travels one can say there is ______ between age of a car and milege. a positive association, no association, a negative association, a scattered association
asked by Sarah 
Word problem
. A catapult launches a boulder with an upwark velocity pf 184 feet per second. the heigh of the boulder in feet after t seconds is given by the function h(t)=16t^2+184t+20. how long does it take the boulder to reach its maximum height? What is the
asked by Alex 
Calculus
If g(x) = a f(x); find g’(x). Is it g'(x)=af?
asked by bex 
Chemisty
The voltage generated by the zinc concentration cell (described by, Zn(s)Zn2 (aq, 0.100 M)Zn2 (aq, ? M)Zn(s)) is 27.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode.
asked by Chem. Student 
Math
Parallel lines are on a ?dimensiona; surface called a _____.
asked by Anonymous 
english
Are you learning english
asked by saleem 
Math
A and B had an equal numbers of cupcakes at first. After B bought twice as many cupcakes as he had at first and A gave away 26 cupcakes, B had 6 times as many cupcakes as A. How many cupcakes did A have at first?
asked by Qi 
calcules
The demand for rice in Japan for a particular year was estimated by the general function q = f (p) =Ap^(0.13), where p represents the price of a unit of rice, A represents a constant that can be calculated uniquely for a particular year, and q represents
asked by Merfit 
Finance
Direct sendSingle. Ocean Research of San Diego, California, just received a check in the amount of $800,000 from a customer in Bangor, Maine. If the firm processes the check in the normal manner, the funds will become available in 6 days. To speed up this
asked by Anonymous 
math
suppose a normal distrubtion has a mean of 25 and a standard deviation of 2. what is the area under the curve between 23 and 27
asked by elizabeth 
math
Andrew borrows $79,500 for 5 months on 6.30% interest rate in his saving account. Calculate the simple interest?
asked by Anonymous 
Chemistry
A current of 5.41 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.30 g of nickel?
asked by At Least I Am Persistent. 
Math
This problem from China is almost 2000 years old: Find a number that when divided by 3 gives a remainder of 2, when divided by 5 gives a remainder of 3, and when divided by 7 gives a remainder of 4.
asked by Ashley 
math
In English Class, after studying a book called \The Lord of the Flies" by William Golding, students are split into 6 groups and each group is required to make a fi lm based on one of the 8 important scenes in the novel. Each group can choose which scene
asked by Aditya 
economics
Do you feel there are any imbalances to our wage structure in our economy?
asked by tiffany 
calculus
a farmer wishes to fence off a rectangular plot of land, using an existing wall as one of the sides . the total are enclosed must be 600 square yards. the fence on the side parallel to the wall will cost 20$ per yard, while the fences on the other side
asked by tttt 
health
In the United States, the highest reported rates of infection of gonorrhea are among sexually active ________. A. Teenagers B. Young Adults C. African Americans D. All of the above It's not B, i get it and was wrong. Please help
asked by mix_lks 
health
Women with bacterial vaginosis may have ________. A. Burning during urination B. No obvious symptoms C. Abnormal !@#$%^&l discharge with an unpleasant odor D. Both A and C It's not C
asked by mix_lks 
statistics
An experiment was conducted to determine the abrasion resistance of a new type of automobile paint. Twelve different strips of metal were painted with the new paint. The abrasion resistance of each piece was then tested on a machine. In the sample, the
asked by Nicky 
calculus
revenue function of x^2+3p=675
asked by tttt 
health
________ is the most frequently reported bacterial sexually transmitted disease in the United States. A. Chlamydia B. Syphilis C. Herpes D. Gonorrhea It's not C.
asked by mix_lks 
maths
I am a quadrilateral. All my sides are equal. I have no parallel sides. I have one line of symmtry. What am I?
asked by What am I ? 
social studies
how was the south carolina constitution of 1868 different from earlier versions?
asked by laila 
statistics
For each combination of sample size and sample proportion, find the margin of error for the 95% confidence level. (a) n=100 and phat=.56 (b) n=400 and phat=.56
asked by Nicky 
Algebra II
Flying against the wind, a jet travels 3220 miles in 7 hours. Flying with the wind, the same jet travels 2820 miles in 3 hours. What is the rate of the jet in still air and what is the rate of the wind?
asked by Jamie 
Math help
A catapult launches a boulder with an upwark velocity pf 184 feet per second. the heigh of the boulder in feet after t seconds is given by the function h(t)=16t^2+184t+20. how long does it take the boulder to reach its maximum height? What is the boulders
asked by Alex 
wold geography
the vist of an influential nuclear physicst to population symposium in1979 led to
asked by carol 
science question?
can someone explain this to me? When the temperature is 68°F, the speed of sound in air is approximately 343 meters per second. Approximately how many kilometers does sound travel in five seconds?
asked by matt 
math
Given a set with n elements has 2^n subsets.Find the number of subsets for set A={2,3,5,7,11}.
asked by mandy 
language arts
Determine if verb is linking verb. 1. This overflow became the Niagara River. Ans. became is the linking verb
asked by cee 
A question
May I ask why this site is called jiskha
asked by anonymous 
Precalc
2x^2  12x  3y^2  24y +60 = 0
asked by Laila 
language arts
Determine if verb is a linking verb: 1. The American Falls lies within the US. Ans. "lies" is a linking verb 2. The Horseshoe Falls lies within Canada Ans, "lies" is a linking verb
asked by cee 
language arts
Find the linking verb and predicate noun or predicate adjective. 1. At night, wide beams of colorful lights look beautiful on the cascades of water. Ans: linking verb is "look" predicate adj is "beautiful"
asked by cee 
stat
only 65% of climbers reach the summit, a random sample of 16 climbers what is the probability that(A) all 16 reach (B) at least 10 reach (C) no more than 12 reach
asked by doris 
biology
Give the phenotype and genotype for the F2 generation of a person with Type a heterozygous blood and a type O blood type. Remember to use all possible parents. Using Punnett squares I got 50% type a blood and 50% type o blood is this right??
asked by maya 
Find force
Find force in the strut: Wall is 20 ft high. Strut begins 4 ft lower, so the "altitude" of strut is 16 ft. "Base" of strut from wall to end of strut = 8 ft. strut is 12 ft on center There is a wind force against wall = 20 lb/ft ^2 Teacher said find wind
asked by Please Need Help 
language arts
Determine each verb and predicate noun or predicate adjective 1. Some people on the steamers get wet from the falls' foam and mist. Ans Verb is "get" "wet" is predicate adjective
asked by cee 
maths
If Asquare+Bsquare=16,and 2Ab=8. Find the possible values of A and B
asked by ogboyeb 
Science
Geothermal power would be classified as a(n) _____________________ resource because its supply will not run out. renewable
asked by Anonymous 
ETH/125
As homosexuality has become more visible, efforts to suppress it have become more a. repressed. b. fragmented. c. institutionalized. d. individualized.
asked by Emily 
physics
I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the
asked by mike 
Physics
A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 20.0 s, the wheels have made 219 rev. What is the angular acceleration of the wheels? What is the angular velocity of the wheels after 20.0
asked by Ted 
Physics
The flywheel of a steam engine runs with a constant angular speed of 112 rev/ min . When steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.2 h. What is the magnitude of the constant angular acceleration of the wheel
asked by Ted 
language arts
Determine each verb and predicate noun or predicate adjective 1.Each year about ten million people visit Niagara Falls. 2.Many industries also operate close by. 3.To them, businesses ruin the area's scenic beauty. 4.Rainbow Bridge spans the gorge below
asked by cee 
chemistry
How many grams of magnesium are required to produce a total of 4.05g of hydrogen
asked by veronica 
Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
asked by Joe 
Maths algebra
The efficiency of an industrial pump decreases by a fixed percentage each year. The percentage decrease each year is with respect to the efficiency of the pump at the start of each year. Over each four year period, the efficiency decreases by 80%. Let us
asked by Jasmine 
Algebra II
Graph the following inequalities y5x+3
asked by Jamie 
Human & Physiology
Discuss the critical and intricate roles the nervous system plays in homeostasis
asked by vicki Cooper 
Math 2
Which is bigger 489 or 498? Use greater or less signs. Thanks
asked by Jenny 2 
Algebra
Consider the function :[1,∞)→Rgivenbytheformulay=x3+2. (a) Show that though the function is increasing at an increasing rate, the change in x required to double the value of the function is not constant. (b) Make a table of values for constant changes
asked by Jasmine 
Physic II
A conducting loop in the form of a circle placed perpendicular to a magnetic field of 0.40 T. If the area of the loop increases at m^2/s, what is the induced emf in the loop?
asked by Nurhan 
math
what are the odds i favor of picking an S in Mississippi?
asked by steve 
Science
An example of a renewable and inexhaustible resource that requires the construction of dams is _________________________ energy. hydroelectric
asked by Anonymous 
Geometry
In circle O, chord AB is 9 inches from the center. The diameter of the circle exceeds the length of AB by 2 inches. Find the length of AB
asked by Jonathon 
Chemistry
For the reaction: 2H^+(aq)+Zn(s)>He2(g)+Zn^2+(aq) a) Write the reduction halfreaction b) Write the oxidation halfreaction c) Identify the oxidizing agent d) Identify the reducing agent
asked by Anna 
FINANCE
Assume the returns from holding smallcompany stocks are normally distributed. Also assume the average annual return for holding the smallcompany stocks for a period of time was 16.5 percent and the standard deviation of those stocks for the period was
asked by Alec 
math
you dump a box of numbered sticks from 1 to 100, what is the probability that I will get a multiple of 5,
asked by Hector 
english
i am having troubles on what to right for the conflict and resolution can someone tell me what they are ? Thanks My Stepmother by Thanh Nguyen When my stepmother first came, her eyes were sharp and bright as little knives. Her youth and my childhood ran
asked by josh anderson 
ChemistryGases
A mixture of gases is prepared from 76.9 g of O2 and 16.0 g of H2. After the reaction of O2 and H2 is complete, what is the total pressure of the mixture if its temperature is 178 ºC and its volume is 11.0 L? What are the partial pressures of the gases
asked by Anonymous 
Chemistry 12
what are the sources of error in preparing ester lab?
asked by maggi 
Chem Ideal Gas Law
Carbon dioxide can be made in the lab by the reaction of hydrochloric acid with calcium carbonate. How many milliliters of dry CO2 at 20.0 °C and 745 torr can be prepared from a mixture of 30.6 g of CaCO3 and 279 mL of 0.250 M HCl?
asked by Anonymous 
math
you dump a box of numbered sticks from 1 to 100, what is the probability that I will get a multiple of 8
asked by Hector 
math
you dump a box of numbered sticks from 1 to 100, what is the probability that I will get a multiple of 5 and 8
asked by Hector 
AP CHEM
is there some rule on weak and strong electrolytes and the amount of concentration requiered for each? for example are weak electrolytes supposed to have low concentrations and vice versa for strong electrolytes? if so cna you please explain why as well?
asked by Sally 
west morgan
find missing dimension cone, r=5in, v=487in3
asked by shelby 
math
missing dimension, 14yd, v=489yd3
asked by shelby 
Social Studies  Please Check my Answer
Please check my answer, I am not sure for this one. In 1784 the British forced American merchants to pay duties on a. trade goods imported from the British West Indies.  (This is my answer.) b. trade goods imported through Canadian ports. c. British goods
asked by Brady 
Help ASAP Statistic
. A new medical test provides a false positive result for Hepatitis 2% of the time. That is, a perfectly healthy subject being tested for Hepatitis will test as being infected 2% of the time. In research, the test is given to 30 healthy (not having
asked by helen 
chemistry
a has at 635 mmHg and 36 C occupies a volume of 9.80 L. calculate at stp
asked by yuuuu 
Calculus Help Please!!! Check
A curve passes through the point (0, 2) and has the property that the slope of the curve at every point P is three times the ycoordinate of P. Find an equation of the curve. dy/dp = 3y or ∫ (3/y) dy = ∫ dp or 3 ln(y) = p + c or @ (0,2) ln(2) = 0 + c
asked by Tenshi 
Calculus Help Please!!!
When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has increased to 10°C. (Round the answers to two decimal place.) (a) What is the temperature of the drink after 60 minutes? (b) When
asked by Tenshi 
physics
pressure cookers have been around for more than 30 years, although their use has stongly declined in recent years.how much force must the latches holding the lid onto pressure cooker be able to withstand if the circular lid is 25 cm in diameter and the
asked by Mohanad 
Calculus Help
A plane flies horizontally at an altitude of 6 km and passes directly over a tracking telescope on the ground. When the angle of elevation is π/3, this angle is decreasing at a rate of π/3 rad/min. How fast is the plane traveling at that time?
asked by Ulay 
Physics
It shows a ball going along a frictionless track. How do you find the kinetic energy at position B on the track if position B is 15 above the ground and position A is 20 meters above the ground? The weight of the ball is .020 kg
asked by Eiban 
Math
A model airplane is made on a scale of 1:128. A)what is the scale factor? b) if the airplane model has a wingspan of 30cm,what is the wingspan of the actual plane? use model over original
asked by Cleopatra 
english
Poem title, author Setting Characters Conflict(s) Resolution Rhyme or rhythm, pattern? on turning 10 You tell me it is too early to be looking back, but that is because you have forgotten the perfect simplicity of being one and the beautiful complexity
asked by josh 
English
Did I do this correctly?? Select the correctly written sentence in this group. A. Spending way too much money on his old car, Fred's salary just wasn't enough. B. Spending way too much money on his old car, Fred soon found he'd used up his salary. (my
asked by Ayesha 
Physics
A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.
asked by Joe 
Physics
Consider the following distribution of objects: a 4.00kg object with its center of gravity at (0, 0) m, a 1.20kg object at (0, 3.00) m, and a 5.40kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of
asked by Joe 
Espanol
Can I get some corrections? 1. ¿Qué estás haciendo? A. Estás sirviendo la cena. B. Estáis leyendo el texto. C. Me estoy levantando. D. No estás haciendo nada. C 2. ¿Entonces estás descansando? A. Sí, estás muy cansado. B. No, estoy trabajando en
asked by James 
Math
Write recursive equation: 1/3,3,27,81,243
asked by Maria 
Calculus Help Please!!!
When blood flows along a blood vessel, the flux F (the volume of blood per unit time that flows past a given point) is proportional to the fourth power of the radius R of the blood vessel: F = kR4 (This is known as Poiseuille's Law.) A partially clogged
asked by Isik 
physics
A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below the surface. Calculate the force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.
asked by Mohanad 
Reading Skills
This question is based on the following paragraph. (1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught
asked by Emily 
Reading Skills
This question is based on the following paragraph. (1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught
asked by Emily 
math
if 2 of the line segments of a polygon are parallel, what is the least number of sides it could be?
asked by Elina 
Derivatives
G(t)=5200/(1+12e^(.52t)) Find G'(t) I keeo getting (32448e^(.52t))/(1+12e^(.52t))^2 Is this correct?
asked by Andy 
physics
A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s^2. In a 3.1s interval, it turns through an angle of 142 rad. How long has the wheel been in motion at the start of this 3.1s interval?
asked by Tsion 
algebra
sqrt 2a = 2 A: a=6 b. a=4 c. a=2 d. no solution is it c ?
asked by ciara 
Reading Skills
Below is the last stanza of a poem, "Dover Beach," written in 1876 by Matthew Arnold. Ah, love, let us be true To one another! for the world, which seems To lie before us like a land of dreams, So various, so beautiful, so new, Hath really neither joy, nor
asked by Emily