Questions Asked on
August 15, 2015

Math Check
For each integer n>1, let A(n) denote the sum of the integers from 1 to n. For example, A(100)=1+2+3+ +100=5,050. What is the value of A(200)? A.)10,100 B.)15,050 C.)15,150 D.)20,100 E.)21,500 I know that the best answer choice is D, but the explanation
asked by Devron 
physics
A convex meniscus lens is made of glass with refractive index, n= 1.5. The radius of curvature of the concave surface is 46.2 cm and the radius of curvature of the convex surface is 22.4 cm. a)Calculate the focal length of the lens. b)Determine the
asked by aiman 
Alg 2
The first term of a geometric sequence is 25, and the fourth term is 1\5. (a) Find the common ratio r. r = Find the fifth term. a5 = (b) Find the partial sum of the first eight terms. S8 =
asked by franey 
Physics
A 96.3kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.619. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.00 s, what is his initial
asked by Jamie 
English
Which of the following sentences is an example of first person narrative voice? A. You were simultaneously exhausted and exhilarated following the crosscountry trip. B. The crosscountry trip was simultaneously exhausting and exhilarating for him. C. She
asked by BARNETTA 
English
8. Due to the cold, the young man walked spryly across campus. Which of the following options is the meaning of "spryly" as used in the sentence above? A Stiffly B. Staunchly C. Easily D. Briskly I thank D is the correct answer
asked by BARNETTA 
Reading
45. 'lead (led). n 1. Position at the front 2. initiative 3. One that leads. 4. Indication or clue. 5. A principal role in a dramatic production ‘lead (led) v. 1 to guide on a way by going in advance. 2. To direct on a course. 3. To direct the
asked by BARNETTA 
Reading
81) Siberia is a giant, semiarctic region encompassing most of northern Asia. Most of Siberia is, or has once been, part of Russia or the Soviet Union. Much of Siberia is frozen and empty. Though Siberia contributes almost 80% of Russia's land area, only
asked by BARNETTA 
Algebra
Use absolute value notation. The distance between x and 10 is at least 6. x(10)>or=6 Is that notation correct?
asked by James 
physics
A 2cm high object is placed 3cm in front of a concave mirror. If the image is 5cm high and virtual, what is the focal length of the mirror?
asked by aiman 
Biology
How is a protein different from a complex carbohydrate? a.The monomers that make up a protein vary whereas the monomers that make up a complex carbohydrate are all the same. b.Proteins function as energy storage polymers whereas complex carbohydrates
asked by Steve 
physics
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 12.5 m/s and accelerates at the rate of 0.450 m/s2 for 7.00 s. (a) What is his final velocity? (b) The racer continues at this velocity to the finish
asked by fdasfg 
math
paul can type 60 words per minute and jenifer can type 80 words per minute how does pauls typing speed compare to jenifers
asked by james 
precalculus urgent
Please help me here as well to clarify more my understanding. Let a1, a2, a3, . . . be a geometric sequence with initial term a and common ratio r. Show that a1^2, a2^2, a3^2, . . . is also a geometric sequence by finding its common ratio. Given that the
asked by Alex 
physics
Two converging lenses, having focal length 5 cm and 10 cm respectively, are placed 25cm apart. An object is placed 10 cm in front of the lens of focal length 5cm. Determine the position and magnification of the final image formed.
asked by aiman 
Urgent math
pls help out with this example as well. Find the term containing x^3 in the binomial expansion of (3x − 3)^10
asked by Aileen 
English
1. On the remote control, press TV once; the button will blink once. Then press and hold SETUP until the TV key blinks twice, then release SETUP 2. Enter 991. The key will blink twice. 3. Aim the remote control at the TV and slowly alternate between
asked by BARNETTA 
prealgebra
4/5x + 5 < 3 A. x < –10 B. x ≤ 0 C. x > 5 D. x ≥ –10
asked by bee 
AP Physics
A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.56 s after the car has passed the stop
asked by Nick 
AP Physics
A passenger train is traveling at 27 m/s when the engineer sees a freight train 345 m ahead of his train traveling in the same direction on the same track. The freight train is moving at a speed of 5.9 m/s. (a) If the reaction time of the engineer is 0.36
asked by Nick 
Math
this is a difficult question for me please help! thankyou A sequence is defined recursively by an + 1 = 3an − n, a1 = 2. Find the first six terms of the sequence. a1 = a2 = a3 = a4 = a5 = a6 =
asked by lene 
Chemistry
How many liters of Carbon Dioxide are formed by burning 6011.0 grams of C3H7OH with excess of oxygen gas and is carried out at 20.00 degrees Celsius, and 1.150 atm of pressure. I know this needs PV=nRT but the burning and excess part is throwing me off.
asked by Alicia 
Algebra
Rewrite each expression with positive exponents and simplify. X^2•x^n/x^3•x^n What does this question mean? Do I just cancel things out? Please help
asked by James 
physics
The convex meniscus lens has a 15cm radius for the convex surface and 20cm for the concave surface. The lens is made of crown glass with refractive index, n=1.52 and is surrounded by air. What is the focal length of the lens.
asked by aiman 
physics
Light of certain wavelength in a vacuum has wavelength of 438 nm if it propagates in water and 390 nm if it propagates in benzene. Calculate the ratio of refractive index of water to the refractive index of benzene.
asked by aiman 
Algebra
Rationalize the denominator. The twos are outside of the square root signs. 5/(sqrt14)2 x (sqrt14)+2/(sqrt14)+2 The answer is sqrt14+2/2 I am having trouible understanding !@#$%^& to get rid of the 5
asked by Maddy 
geometry d the sspeed of the bicycle in m/s
a bicycle wheel has 77cm in diameter and makes revolution per second .find the speed of the bicycle in m/s
asked by sai 
Algebra ASAP
Pls help me out, I really need help. A puppy weighs 0.85 lb at birth, and each week he gains 29% in weight. Let an be his weight in pounds at the end of his nth week of life. (a) Find a formula for an. an = (b) How much does the puppy weigh when he is six
asked by hey 
Urgent math
how do I do this can any body show me how? An arithmetic sequence begins 4, 9, 14, 19, 24, . . . . (a) Find the common difference d for this sequence. d = (b) Find a formula for the nth term an of the sequence. an = (c) Find the 35th term of the sequence.
asked by Aileen 
Reading
2. Which of the following sentences is written correctly? A When properly designed, an automobile can achieve great fuel efficiency. B. When properly designed an automobile can achieve great fuel efficiency. C. When properly designed, great fuel efficiency
asked by BARNETTA 
Reading
46. Count' verb 1. to list numbers sequentially 2. to add up; enumerate 3. to include in a reckoning 4. to deserve consideration, to have merit noun 5. the act of counting, a calculation 6. the total number resulting from a count 7. Baseball, the number
asked by BARNETTA 
lasmocol
What is the molarity of 1.70 of silver trioxonitrate(v) in 500cm
asked by sami kun 
Reading
44. Super tires Full set special $ 175 30,000 plus 10, 000 miles warranty Balance, rotation, and Alignment included Free disposal of old tires ($50 value) Good Tread Tires Four tires $ 150.00 40,000 miles warrantly Balance, rotation and Alignment $25 Free
asked by BARNETTA 
math
black tea at $2.40 per kg is mixed with green tea at $3.20 per kg in the ratio 1:3 calculate the weight of each type of tea in 40 kg of the mixture and calculate the price per kg of the mixture
asked by shah 
Reading
40. From Laurencaville, take highway 9 for 20 miles (about 30 minutes) until you reach the third katetown?? Exit (exit 116). Turn north on Park Street and drive for 3.1 miles, past six stop lights. Take a left on 3rd Avenue and drive six blocks. The store
asked by BARNETTA 
Reading
36 Performing Arts Center Classical Series Concerts Single ticket price: Saturday night: Orchestra – Center : $55 Orchestra – Right Center/Right: $35 Orchestra – Left Center/ Left $45 Mid/Rear Balcony: $50 Center Balcony : $55 Dress Circle: $60 Rear
asked by BARNETTA 
Reading
29. Whig Committee of New York, 199 Whig National Convention of 1852, 13233 Whig National Convention of 1856, 168 Whig Party, 9, 10, 22, 26, 55, 71, 8890, 132, 167 agenda of, 4344 demise of, 130, (NNN) NNNNllllinois election and, 149 of New York,
asked by BARNETTA 
Reading
25. A customer who purchases a Super Pack Unlimited indoor/outdoor pass most likely chose this option because he: A. likes to take repeated rides on the gokarts and bumper cars. B. has small children who want to play all day in the Fun Center. C. wants to
asked by BARNETTA 
Masiphathisane
What Career Iwill Have To Choose If I'm Doing Maths Lit And Accounting After Grade12
asked by Asanele Ngxito 
Afro
A man roll a boat in still water at a speed of 1m/s. The man set out to roll the boat in a river from a to b. The water in the river flows at 0.5m/s in the opposite direction.Determine the violocity of the boat through the water.
asked by Fakorede segun 
Science
How does water acts as an insulator and a shock absorber?
asked by @@@Kee 
Programming
This question is about football matches between teams. A record of games played between teams is stored in a graph G. Each edge in the graph corresponds to a match between a pair of teams. For example, if there is an edge between vertices 3 and 6 then Team
asked by Jim 
Math
Kate made a birthday cake for Bryan’s second birthday. One of the guests on the party (who is a preschool director) thought how awesome it would be to have a cake like this for the Open House next week! She asked Kate to make one for her. She wanted to
asked by Althea 
Math
Two marbles are sitting side by side in a glass container. The base of the container is 10 units long and the radius of the smaller marble is 2 units. What is the radius of the larger marble? Describe the strategy you are going to use to answer the
asked by Joy 
physics
which type of forces does a proton exerts on a proton inside nucleus? my answerrepulsion force
asked by rahul 
Life science
Explain the scientific interpretation of the fossils found in the cradle of humankind.
asked by Itumeleng 
Accounting
Samantha owned 1,000 shares in Evita, Inc. an S corporation, that uses the calendar year. On October 11, 2010, Samantha sells all of her Evita stock. Her basis at the beginning of 2010 was $60,000. Her share of the corporate income for 2010 was $22,000,
asked by Jay 
math
a certain alloy contains 5.25% cooper. how much cooper is there in a piece weighing 200 pounds.
asked by james 
criminology
What do futurists predict the explanations for crime in the future will be? A. More eclectic, less traditional B. More collective, less individualistic C. More theoretical, less pragmatic D. More social, less biological
asked by londyn 
math
edgar earns 200 dollars a week plus a 15% commission on all sales over 1,000 dollars.if edgar sells for one week or 2,500 dollars what is his gross pay for that one week.
asked by james 
ENGLISH
WHICH OF THE FOLOWING SENTENCES USES THE BEST CLOSEUP WORDS?
asked by JAMESHA 
physic
A 7kg box sled is coasting across frictionless ice at speed of 9 m/s when a 9kg package is dropped into it from above. what is the new speed of the sled?
asked by Nithiya 
Reading
Siberia is a giant, semiarctic region encompassing most of northern Asia. Most of Siberia is, or has once been, part of Russia or the Soviet Union. Much of Siberia is frozen and empty. Though Siberia contributes almost 80% of Russia's land area, only a
asked by BARNETTA 
Math
can anybody show me step by step? Find the sum. (a) 1/3+ 2/3^2+ 2^2/3^3+ 2^3/3^4+.......... + 2^9/3^10 S10 = (b) 1 + 1/2^1/2+ 1/2+ 1/2^3/2+ S =
asked by lene 
precalculus urgent
The first term of an arithmetic sequence is 6, and the tenth term is 2. (a) Find the common difference d. d = Find the 100th term of the sequence. a100 = (b) Find the partial sum of the first ten terms. S10 = how do i do this, there's an example I tried
asked by Alex 
Urgent math
so I tried to expand this question and I got x^3 *x2, i don't know if it's right but if not can I get a step by step explanation please, Expand (2x + y^2)^5. (Simplify your answer completely.)
asked by Aileen 
math!!!!!!!!!!!!!
what is 2/5 as a regular number
asked by anon 
Physical science
Ball A attracts B and repels C. Ball D attracts B and has no effect on E. A negatively charged rod attracts both A and E. What are the charges,if any,on each ball?
asked by Beauty 
math, pls help ASAP
what is 2/5 of 25
asked by anon 
elim high school
assess the extent to which bad road users has a direct impact on the physical, emotinal, social and economic aspects to the family, the community and the country
asked by mulalo mpho ramaru 
Reading
Setting Up Your Universal Remote Control Searching For Your Device Codes For example, to search for a code for your TV: 50. Turn on your TV 1. On the remote control, press TV once; the button will blink once. Then press and hold SETUP until the TV key
asked by BARNETTA 
Reading
41. Choosing the Resolution for Your Photos Resolution Purpose L (Large) 2592x1944 pixels Print larger that A 4 size prints (8.3 x 11.7 in.) Print larger than letter size prints (8.5 x 11 in.) M1 (Medium 1) 2048 x 1536 Print up to A4 size prints. Prints up
asked by BARNETTA 
Reading
40. From Laurencaville, take highway 9 for 20 miles (about 30 minutes) until you reach the third katetown?? Exit (exit 116). Turn north on Park Street and drive for 3.1 miles, past six stop lights. Take a left on 3rd Avenue and drive six blocks. The store
asked by BARNETTA 
Reading
38. From Laurencaville, take highway 9 for 20 miles (about 30 minutes) until you reach the third katetown?? Exit (exit 116). Turn north on Park Street and drive for 3.1 miles, past six stop lights. Take a left on 3rd Avenue and drive six blocks. The store
asked by BARNETTA 
math
The length of the office room is 11.5 m & width is 12.5 m. How much carpet is required for covering the floor ?
asked by mrajput 
math
With two pumps it takes 60 hrs to empty an oil tanker. How much time will taken with five pumps ?
asked by mrajput 
math
Rodney and Cauls’s houses having distance of eleven km Rodney start from his house by walking at the speed of 6 km / hr , Caouls at 5 km / hr at what distane they will meet , if Rodney start his journey later by 5 minutes then which time they will meet ?
asked by mrajput 
math asap
this is a difficult question for me please help! thankyou A sequence is defined recursively by an + 1 = 3an − n, a1 = 2. Find the first six terms of the sequence. a1 = a2 = a3 = a4 = a5 = a6 =
asked by lene 
Alg 2
pls help with this expansion of the binomial. [(6a)x+ay]^12 ?
asked by franey 
Physics
Take element Z = 24 from the periodic table. Ionize it 23 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?
asked by Julie 
Algebra
Factor: x^4(4) (2x+1)^3 (2x)+(2x+1)^4 (4x^3) Please help! I cannot figure out how to go about this problem
asked by Maddy 
Algebra
Factor completely: X^3 (3)(x^2+1)^2 (2x)+(x^2+1)^3 (3x^2) Please help. I have tried multiple times.
asked by Adeline 
Chemistry
All BrønstedLowry acids A. are aqueous solutions. B. can act as Arrhenius acids. C. donate protons. D. all of the above I got C but could it be D?
asked by sydney 
Calculus
As x goes to zero, what is the limit of (( 1/ x+2) (1/2)) / x? I know the answer is 1/4, but I'm confused on how to get that answer. I think I have to multiply by the reciprocal.
asked by Anonymous 
Algebra
Factor completely: X^3n+y^3n Do I factor it as a cube? Can't figure it out
asked by John 
Chemistry H
"When you pulled the steel wool apart, you found that the mass was unchanged. When you heated the steel wool, you found that the mass changed. Explain."
asked by Rachel 
speech
i need an example on " You will choose an aspect of your life/personality to highlight and speak about to give your audience a better idea of who you are. Your goal is not to reveal as much information as possible to your audience, your goal is to let some
asked by lauren 
physics
A student investigates the interference of light in a Young’s double slit experiment. i). Explain why there is no interference pattern if the two slits are 5.0 cm apart. ii). Explain why it is better for the student to observe the interference patterns
asked by aiman 
physics
A thin layer of liquid methylene iodide (n=1.756) is sandwiched between two flat parallel plates of glass (n=1.50). What must be the thickness of the liquid layer if normally incident light with in air is to be strongly reflected?((2m+1),85.4nm)
asked by aiman 
physics
Light from sodium lighting passes through a single slit, then through double slit system and is projected on a screen. The separation distance between the slits of the double slits is 1.00mm. The screen is placed at 1.0m from the double slits system and
asked by aiman 
physics
A monochromatic light illuminates a double slits system with a slit separation, d =0.3 mm. The maximum of the first order occurs at y = 4.0 mm on a screen placed at 1.0 m from the slits. Find the: a)Wavelength b)Distance between the central maximum and the
asked by aiman 
physics
An insect of height 1.5 cm is 13cm from a converging lens of focal length 13.5 cm. Determine the position, height and properties of the image formed.
asked by aiman 
Math
Kate made a birthday cake for Bryan’s second birthday. One of the guests on the party (who is a preschool director) thought how awesome it would be to have a cake like this for the Open House next week! She asked Kate to make one for her. She wanted to
asked by Althea 
chemistry
Outline the following synthesis: a) 2 – methyl propene > 2methyl2propanol. b) 3 –ethylpentene > carbon dioxide, water and 2ethylbutanoic acid. c) 2 methyl2pentene > 2chloro2methylpetane and 3chloro2methylpentane d) 1ethylcyclohexene >
asked by aiman 
English
How do you diagram the sentence, "I will do my homework later tonight."
asked by Jasmine 
maths
since a rectangle forms two area of a circle shouldn't it also form two circumference in a cylinder
asked by jay 
English
. Extending her arms over the leftfield wall, the baseball plummeted toward the fan, and she caught it cleanly on the fly before displaying the home run ball for all to see. Which of the following phrases is misplaced in the sentence above? A. Extending
asked by bARNETTA