Questions Asked on
March 14, 2015

earth
When earth is seen from outer space,it looks mainly blue. This is because most of the earth is covered with.
asked by leslie 
chemistry
Hey DrBoB222 I was wondering if you could help me with that problem just a little bit ago again?
asked by jack 
Maths
Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a
asked by Sam 
Philosophy
Do you believe that humans have free will? Why or why not? Support your response with concrete examples.
asked by TayB 
math
Roughly sketch the region enclosed by the curves y = sin x, y = cos x and the x  axis between x = 0 and x = p/ 2 . Also find the area of this region.
asked by usha 
Physics  Mechanics
A bullet of mass m is shot at speed v toward a pendulum bob of mass M. The bullet penetrates through the block and emerges on the other side traveling at speed v/2. 1. What is the speed v_block of the block immediately after the bullet emerges from the
asked by Anonymous 
Physics  Mechanics
A large box of mass M is at rest on a horizontal table whose surface is rough; the coefficient of static friction between the table and the block is μ. The box is connected by a taut string to a small block of unknown mass m, initially held horizontally
asked by Anonymous 
Physics  Mechanics
A small block of mass 1.2 kg is launched by a compressed spring with force constant k=600 N/m. The initial compression of the spring is 0.15 m. The block slides along a horizontal frictionless surface and then up an inclined plane that makes an angle
asked by Anonymous 
maths
base perimeter of a triangular prism is 25 cm and its height is 40 cm .calculate its lateral surface area?
asked by jinu 
physics
a car is moving at speed of 50km/hr ,can be stopped by brake at least at 6 m.If the same car is moving at speed of 100 km/hr ,what is the minimum stopping distance?
asked by priya 
physics
A chair of mass 14.0kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 40.0N that is directed at an angle of 43.0∘ below the horizontal and the chair slides along the floor.
asked by Kevin 
physics
The density of copper is 8930 kg per cubic metre. A rod of copper is 20 cm long. What length of it will remain immersed in mercury of density 13600 kg per cubic metre
asked by Suraj 
Physics
Hi, can anybody provide some hints in how to approach these questions? I've been stuck on it for days!!! Thank you in advance!! Nodes of a Standing Wave: Consider a standing wave, where y represents the transverse displacement of a string that extends
asked by Tommy 
math
which pizza has the best value for the money; a 10 inch round pie for $6 or a 14 inch pie for $10? Support your answer.
asked by Michelle 
physics
A 130kg crate is initially at rest on a horizontal frictionless surface. An applied force of 400 N to the right is exerted on the crate, causing it to move and cover a distance of 26.0 m. At the end of its path, the crate is found to be moving at a speed
asked by jjjj 
SCIENCE(CHEMISTRY)
calculate the mass of silver deposited when a current of 2.6a is passed through a solution of a silver salt for 70mins ag=108,1 faraday 96500
asked by MIRACLE IWUNZE 
algebra2
(x5)^1/3 4=2
asked by anonymous 
hct
How many pints of a 7% cleaning solution must be mixed with 9 pints of a 15% cleaning solution to give a 13% solution?
asked by lody 
Math
Find the 10th term of a nonconstant arithmetic sequence whose 1st term is 3 with the 1st, 4th, and 13th term forming a geometric sequence. I've tried doing it differently everytime, but I always come to a dead end..
asked by Anon 
Algebra
This is for a project for Beginning Algebra at Great Bridge Middle School 8th grade class. Here's the questions: The number of companies offering cell phone service has grown rapidly in recent years. The plans they offer vary greatly and it can be
asked by Connie 
Criminal Justice/Probation & Parole
According to psychoanalytic theory: A. behavior is the result of operant conditioning. B. crime is the result of positive reinforcement. C. conscious behavior is the result of unconscious thought. D. all of the above I think it's C, but not sure.
asked by Pat 
gabigabi secondary mathlit
they leave kimberly on sunday morng and need to be in bloemfontain by 12:00 to get ready for their concert at 14:00 what is the letest time that they can leave kimberly .if the assume that their average speed when they travelling will be 90km/h
asked by nonhle 
algebra2
cuberoot(n+8)6=3
asked by anonymous 
math
3/5 of the people at a funfair were children. 3/4 of the remaining people were men. There were 140 more children than women. How many people went to the funfair?
asked by jessi 
Corporate Finance
Suppose you have been hired as a financial consultant to Defense Electronics, Inc. (DEI), a large, publicly traded firm that is the market share leader in radar detection systems (RDSs). The company is looking at setting up a manufacturing plant overseas
asked by Student 
chemistry
the wave length of the first line of the Lyman series of hydrogen is identical to the second line of the Balmer series for some hydrogen like ion 'X'.Identify the ion.
asked by babai 
maths
a cubical water tank is filled by tap water at the rate of 1.4liters per second. find the length of the tank in centimeters if the tank if completely filled in 28minutes
asked by neevetha 
ENG1511
Please rephrase this people's claims that they have friends with whom they share ideas and life experience.
asked by Nondumiso 
Math
Montreal's Marathon building is 395 m tall. From a point level with, and 148m from, the base of the building, what is the angle of elevation to the top of the building?
asked by Rishabh 
math
How would I solve this equation for x? 0=3.9657(0.9982^x)ln0.9982
asked by Sara 
Chemistry help
washing soda is a hydrate of sodium carbonate. a 2.714 g sample of washing soda is heated until a constant mass of 1.006 of na2co3 is reached. what is the mass of the water evaporated? what is the percent water in the compound?
asked by Anonymous 
Chemistry help
Write two molecular formulas that reduce to each to each of the given empirical formulas. Do not include the given empirical formulas. 1. Al2(SO4)3 . Cr(CN)3
asked by Anonymous 
chemistry
what are the islamic values in the experiment composition of potassium chlorate?I have to do lab report about the topic and the due date is around the corner.please help me..
asked by student 
Criminal Justice/ Probation & Parole
The advantage of selecting probation/parole officers on the basis of a written examination is that: A. it produces the candidates who will be the best probation/parole officers. B. it provides the hiring agency with the greatest amount of flexibility. C.
asked by Pat 
math, scale drawing
charlies swimming pool is rectangular. it has an area of 120ft2. charlie drew a scale drawing of the pool using the scale 3/2 centimeters= 2 feet. what was the area of the scale drawing?
asked by Farvah 
life orientation
four kinds of fraud the student who receive and repay nsfas should guard against commiting?
asked by pressure 
science
The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea
asked by Anonymous 
math
A point (5, 4) is mapped onto (1, 1) by a translation. Find the image of (4, 5) under the same translation.
asked by kudu 
math
Two towns P and Q are 400 km apart. A bus left for P and Q. It stopped at Q for one hour and then started the return to P. one hour after the departure of the bus from P, a trail also heading for Q left P. the trailer met the returning bus ¾ of the way
asked by kudu 
Chemistry
Suppose 0.500 g of sulfur combines with 1.00 g of copper. What is the empirical formula of the compound? The atomic mass of sulfur is 32.065 g and the atomic mass of copper is 63.546 g.
asked by Catherine 
Chemistry
Describe the procedure to prepare this solution: 100 mL of a solution 0.1 M of KMnO4 Help? I don't understand what this implies.
asked by Amy 
Chemistry
Given that 12.25 g of aluminum sulfide is reacted with excess water. How many grams of aluminum hydroxide can be obtained? The molar mass of aluminum sulfide is 150.0 g and the molar mass of aluminum hydroxide is 78.0 g.
asked by Catherine 
math
Two points P and Q have coordinates (2, 3) and (1, 3) respectively. A translation map point P to P’ (10, 10) (a) Find the coordinates of Q’ the image of Q under the translation (b) The position vector of P and Q in (a) above are p and q respectively
asked by kudu 
math
P (5,) and Q (1, 2) are points on a straight line. Find the equation of the perpendicular bisector of PQ: y = mx+c how to find missing
asked by kudu 
English
For a paragraph about the Midwest can culture, language, manners go into one paragraph?
asked by m 
Math
Hi! I wanted to know how you would sketch the graph of this system of inequalities. Math problem: 2x2 + y ≥ 2 x ≤ 2 y ≤ 1
asked by Heather 
Finance
A firm's bond's have a maturity of 10 years with a $1,000 face value, an 8 percent semiannual coupon, are callable in 5 years at $1,050, and currently sell at a price of $1,100. What are their yield to maturity and their yield to call? What return should
asked by Hk 
statistics
A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for addressing this
asked by madi 
Vectors
Does the point of intersection between L1:(4,9,2)+s(1,1,1), seR and Ls: (2,11,4)+t(5,3,4), teR lie on the plane 3x2y+3z+4=0?
asked by Sara 
science
3.A weather station is located 300 miles directly east of a second station. Winds at the eastern station are blowing from the south. Winds at the western station are blowing from the north. What is true about the weather system near these two locations? A.
asked by Angelina 
Vectors
Explain why the planes 3x6y9z+5=0 and x+2=2y+3z never intersect
asked by Sara 
Education/College level
Using the NETS for teachers Standard 1. b. Facilitate and inspire student learning and creativity. b. Engage students in exploring realword issues and solving authentic problems using digital tools and resources. Using this standard I have to: create a
asked by Cathy 
Calculus
Find an equation of a line tangent to y = 2sin x whose slope is a maximum value in the interval (0, 2π] I believe the equation is y=2x4pi. How is the bvalue 4pi?
asked by Sara 
finance
You want to have $2 million in real dollars in an account when you retire in 30 years. The nominal return on your investment is 8 percent and the inflation rate is 5.3 percent. What real amount must you deposit each year to achieve your goal? (Do not round
asked by jake 
algebra
you research the cost of a gallon of gasoline over several years to look for trends the table shows the data you have collected what is the equation of the line of best fit how much would you expect to pay for gasoline in 2029 a)y=0.538x+1.36; $33.10 b)
asked by matt 
Physics
A 1.42 kg ball is connected by means of two massless strings, each of length L = 1.29 m, to a vertical, rotating rod. The strings are tied to the rod with separation d = 1.29 m and are taut. The tension in the upper string is 48.0 N. What are (a) the
asked by Brian 
Managerial Accounting
Joanna Pauly was delighted to see that her ROI ﬁgures had increased for the third straight year. She was sure that her campaign to lower costs and use machinery more efﬁciently (en abling her factories to sell several older machines) was the reason
asked by mary 
Chemistry
What is the cause of hexagonal structure ?
asked by Ciaria 
Science
fus = 12.5 and vap = 93.2 both j/k x mol Determine the entropy change when 7.30 mol of HCL(g) condenses at atmospheric pressure. my first answer was 91.3 but it keeps telling me that is incorrect and that delta Svap if scaled at 1.00 mol but needs to be
asked by Talaya 
english
Researchers are LEAST likely to want to know which of the following from their sources?
asked by marcus 
teacher aide
lesson  02604500  helping abused children
asked by maggie 
psychology
which of the following has been demonstrated by research as a skill or ability that is induced via meditation? A) ability to raise metabolism B) ability to cure bacterial infections withou medication C) ability to lower body temperature D) ability to
asked by Carol 
Chemistry
How many millilitres of a 0.1 M solution of NaF and of 0.1 M solution of HF must be mixed to obtain 1L of buffer at pH = 4? Ka = 6.7 × 104 Currently I am quite confident with using the henderson and Hasselbalch equation but this question has left me
asked by James Wilson 
Statistics
How many different ways can you put 3 distinguishable things in 10 boxes?
asked by Bob 
math
How would I write the equation y=3.9657(0.9982^x) in the format of g(x)=f(x)+f(x60)?
asked by Sara 
Pre.Calc
You want to make an investment in a continuously compounding account over a period of ten years. What interest rate is required for your investment to double in that time period? Round the logarithm value to the nearest hundredth and the answer to the
asked by Julissa 
Calculus
The limit as x approaches 4 ((3x+1)/(x4)^2) is A. 11 B. 13 C. Infinity D. Negative infinity E. DNE
asked by Anonymous 
H Chemistry
if 1.01x103 ml of h2o gas at stp is compressed into o.345ml container what would the new pressuer be
asked by angie 
reading help
Vocbulary Words: Assist Assume Bluntly Commission Competitors Disapprove Earnings Exasperated Extinguished Humiliating Patron Percentage Personnel Rectify Regardless Worthwhile Use each clue to write a vocabulary word. a. not disadvantageous but, b. not
asked by John Dosley 
math
nine friends each get 1 half of a candybar. How many bars are there? show your work.
asked by rauline 
Math
1. Solve: log (y1) = log(y9) 2. Find the inverse of the logarithmic function f defined by f(y)= 2log5 (2y8)+3.
asked by Lily 
Spanish
Sabemos que Juan A. estudió matemáticas. B. estudió arte. C. estudió literatura española.
asked by Ciaria 
Calculus check
If f(x)=sin^2(3x) then f'(0)= A. 2cos3 B. 2sin3cos3 C. 6cos3 D. 2sin3cos3 E. 6sin3cos3 I got B
asked by Sarah 
coding
Anesthesia services for closed treatment of fracture of humerus; patient is 85 years old, but healthy. Provide the code(s) and the physical status modifier.
asked by kory 
spanish
Cuando el empleado del hotel es atento y cortés es bueno darle _____. A. un ascensor B. una llave C. una propina D. un itinerario
asked by Ciaria 
Calculus check
y=1/sqrt(x^2+1) , then dy/dx= A. x/(x^2+1)^1/2 B. x/(x^2+1)^1/2 C. x/(x^2+1)^1/2 D. x/(x^2+1)^3/2 E. x/(x^2+1) I got B.
asked by Sarah 
spanish
Si vas al mar, vas a disfrutar del _____ y de _____.
asked by Ciaria 
Calculus check revised.
y=1/sqrt(x^2+1) , then dy/dx= A. x/(x^2+1)^1/2 B. x/(x^2+1)^3/2 C. x/(x^2+1)^1/2 D. x/(x^2+1)^3/2 E. x/(x^2+1) I got B.
asked by Sarah 
Chemistry
Oil and water don't mix. We say that oil is
asked by Kris 
Spanish
Es mejor que Uds. _____ en la excursión hoy porque mañana no hay suficiente tiempo. A. vayan B. van C. va D. vaya
asked by Ciaria 
PreCalc.
Change the exponential statement 5^x=125 into an equivalent logarithmic statement. I know the answer is log5(125)=(x) Just don't know the steps to get it.
asked by Julissa 
Geom
I have a 25cm wheel across how many rotations to go 100000 kilometers
asked by Jim 
spanish
Si necesitas dinero en efectivo, hay _____ en muchos lugares en la excursión. A. quioscos B. artesanías C. cajeros automáticos D. vendedores
asked by Ciaria 
PreCalculus
How many parameters in a quadratic function in a vertex form change when you change the location of the vertex? ( P and Q change? The value of the coefficient( a ) may also change?)
asked by Lucina 
Spanish
Hello how do I say "my future house" in spanish. I didn't want to use google translate because of the grammar.
asked by kevin 
Calculus
If y=3/(sinx+cosx) , find dy/dx A. 3sinx3cosx B. 3/(sinx+cosx)^2 C. 3/(sinx+cosx)^2 D. 3(cosxsinx)/(sinx+cosx)^2 E. 3(sinxcosx)/(1+2sinxcosx)
asked by Anonymous 
spanish
Hicimos _____ a una catedral histórica en Madrid. A. un quiosco B. una gira C. un ruido D. una propina
asked by Ciaria 
math
. If a fowl is treated, probability of dying is 1/10 while if not treated the probability is 7/10 calculate the probability that, a fowl picked at random from the 36 fowl is (i) Treated with the drug and will die (ii) Not treated with the drug and will die
asked by kudu 
Calculus
f(x)=x^n , where n is a positive integer greater or equal to 2. The graph of f(x) will have an inflection point when n is A. Even B. Odd C. Divisible by 3 D. For all values E. For no values
asked by Anonymous 
business maths
For an investment to double in value during a 12year period, a. What annually compounded rate of return must it earn? (Round your answer to two decimal places.) Annually compounded rate of return % b. What monthly compounded rate of return must it earn?
asked by bajwa 
math
Please explain question. How many tons are in 1/2 of a ton.
asked by Milan 
Calculus
In the next questions, a particle is moving along a horizontal line according to the formula: s=2t^44t^3+2t^21 a) the particle is moving right when A. 0 is less than t is less than 1/2 B. t is greater than 0 C. t is greater than 1 D. 0 is less than t is
asked by Anonymous 
math
Please explain this. How many tons are in 1/2 of a whole ton.
asked by Milan 
Calculus check
The integral of (x^24secxtanx) dx= I got x^3/34secx+c
asked by Sarah 
Calculus 2
∫ tan^2 (x) sec^4 (x) dx ∫ [tan^2 (t) + tan^4 (t)] dt ∫ [1tan^2 (x)] / [sec^2 (x)] dx Trigonometric integral Please show steps so I can understand!
asked by Janice 
Calc
∫ (2x+1)/(x+1) dx Please show steps if you work it. I think it's a partial fraction and worked with decomposition. Not sure though.
asked by Janice 
Calculus
∫ x^3 √(16x^2) dx evaluated between [0, 4] I know this is solved using trigonometric substitution, but I'm not sure how to work it. Please show steps so I will understand.
asked by Nick 
calculus trig substitution
∫ x^3 √(x^2+9) dx If you work it can you write the steps? I really don't like the way my teacher teaches it. Someone else doing it might help.
asked by Allie 
Fiance
If you take out an $8,400 car loan that calls for 36 monthly payments starting after 1 month at an APR of 9%, what is your monthly payment?
asked by Libby 
Math
Q. Pete wants to buy a stack of clothing that totals $200. The sales tax is 6% if you add tax to his total bill, what is Pete's grand total? A. Do I * 200 * 6 ?
asked by Destinee 
math
Please answer and explain how you received this answer. A cargo van is carrying 20 identical steel cylinders. Each cylinder contains compressed oxygen. Altogether, the cylinders weigh one half of a ton. In tons, what is the weight of each cylinder?
asked by nicey 
Calculus
The normal (perpendicular) line to the curve y=sqrt(8x^2) at (2,2) has slope A. 2 B. 1/2 C. 1/2 D. 1 E. 1 I got A
asked by Sarah 
Calculus check
If f(5)=3 and f'(5)=2, find the derivative of x^2f(x) at x=5. A. 0 B. 18 C. 12 D. 20 E. 80 I got D
asked by Sarah 
Calculus
The circumference of a circle is increasing at a rate of 2pi/5 inches per minute. When the radius is 5 inches, how fast is the area of the circle increasing in square inches per minute? A. 1/5 B. pi/5 C. 2 D. 2pi E. 25pi
asked by Anonymous 
Physics
1. What is the kinetic energy of a 0.50 g insect traveling in a straight line at 5.0m/s? a. 6.25j b. 1.25j c. 5.0j d. 250j Is the answer A?? 2. Mechanical energy is defined as the sum of which of the following? a. kinetic, potential and radiant energy b.
asked by N. 
spanish
Si quieres trabajar en un laboratorio químico, serás _____. A. arquitecto B. científico C. mecánico D. veterinario
asked by Ciaria 
spanish
Como me gusta estar al aire libre y hacer ejercicio, creo que me gustaría seguir una carrera como _____. A. científico de laboratorio B. abogado C. cartero D. juez
asked by Ciaria 
Physics
Assuming atmospheric pressure to be 1.01 x 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? Could you show me how to do this problem? Thank you.
asked by N. 
PreCalculus
I tried to do these questions, however I can't seem to get the answer. Can someone help me? I would really appreciate it. _____________________________________ Mathematical Induction Prove that the statement in true for every positive integer n. 1. 1/1*2*3
asked by Anonymous 
Spanish
Algún día tendrás que _____. A. seguir una carrera B. ganarte la vida C. graduarte del colegio D. All of the above A or D ?
asked by Ciaria 
Spanish
Creo que después de terminar el programa de estudios en computación, yo _____ todo lo que necesito para seguir esa carrera. A. supe B. sabía C. sé D. sabré B or d ?
asked by Ciaria 
Calculus
A function f(x) is continuous for all x and has a local minimum at (1,8). Which must be true? A. f'(1)=0 B. f' exists at x=1 C. The graph is concave up at x=1 D. f'(x) is less than 0 if x is less than 1, f'(x) is greater than 0 if x is greater than 1 E.
asked by Anonymous 
college algebra
How much should be deposited in an account paying 3.5% interest, compounded quarterly, in order to have a balance of $ 6,000after 17years and 3months?
asked by James 
English Grammar
Please Help Check My Answers. 1. *****A. "The leaves," she explained, "can be anywhere from two to eight inches long." B. Nan said, "It can also have dark or light green leaves". C. "Also," she added. "the leaves' edges can be smooth or wavy." D. "It can
asked by Anonymous 
biology
Hi, This is a question on my biology test review that I don't understand. I think the answer is pine trees, but I'm not really sure. Please help! In a barren terrestrial habitat, which of the following would be an example of a pioneer organism? moss pine
asked by Kaden 
algebra
you research the cost of a gallon of gasoline over several years to look for trends the table shows the data you have collected what is the equation of the line of best fit how much would you expect to pay for gasoline in 2029 a)y=0.538x+1.36; $33.10 b)
asked by matt 
Calculus
if f'(x)=2(3x+5)^4 , then the fifth derivative of f(x) at x=5/3 is A. 0 B. 144 C. 1,296 D. 3,888 E. 7,776 I got A
asked by Sarah 
Algebra
1. Solve: log (y1) = log(y9) 2. Find the inverse of the logarithmic function f defined by f(y)= 2log5 (2y8)+3.
asked by Lily 
Calculus
For how many values of x will the tangent lines to y=4sinx and y=x^2/2 be parallel? A. 0 B. 1 C. 3 D. 4 E. Infinite
asked by Anonymous 
Calculus check
Given f(x)=4+3/x find all values of c in the interval (1,3) that satisfy the mean value theorem. A. 2 B. Sqrt(2) C. Sqrt(3) D. +or sqrt(3) E. MVT doesn't apply I got C
asked by Sarah 
physics
when 200 grams of aluminum at 100 degrees celsius is dropped into an aluminum calorimeter of mass 120 grams and containing 150 grams of kerosene at 15 degrees celsius,the mixtures reaches a temperature of 50 degrees celsius.what is the specific heat of
asked by john ralph 
math
If cos 3 theta=sin 30 find the value of theta without using a calculator Is theta = sin 30/ cos 3 = 10
asked by Jenette