Questions Asked on
October 12, 2017

Physics
A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.15 W of light energy. What is the efficiency of the cell?
asked by benjamin 
PreCalc
QP is (x y) = (3 1) + r (14 10) QR is (x y) = (3 1) + s (17 9) PR is (x y) = (0 18) + t (5 7) where r, s, and t are scalars. 1. Use vector methods to find the coordinates of P, Q, and R. 2. Find vectors PQ and PR and evaluate PQ*PR 3. Find size of QPR
asked by John 
Algebra
Simplify. Complex Fractions. b2b/b+3/1/b+3+1/b3= LCM: (b+3)(b3)
asked by Keonn'a 
Chemistry
In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final
asked by Nick 
Maths
A building, B, is observed from two points P and Q which are 250 m apart. The angles PQB and QPB are found to be 67 degrees and 73 degrees respectively. What is the distance, to the nearest metre, of P from the building?
asked by Jay 
Science
3.365*10^5 to 3
asked by Areej 
History
Which religion was prominent to much of North Africa in the early 1800s?
asked by Dan 
Chem
20.6 gm NaBr solved in 500 ml of water. What will be the molarity of solvent. Where Na 23 n Br 80
asked by Aarush 
Math
A square garden has an area of 65 square meters.The lenght of a side is between which two measurements?
asked by Lezela 
math
Meg's pension plan is an annuity with a guaranteed return of 3% per year (compounded quarterly). She would like to retire with a pension of $50,000 per quarter for 5 years. If she works 21 years before retiring, how much money must she and her employer
asked by patrick 
Biology
What are the possible allele combinations that could occur in a gamete produced by an individual who is heterozygous for the traits of flower color and height?
asked by Anonymous 
physics
A dog running in an open field has components of velocity vx = 2.5 m/s and vy = 1.3 m/s at time t1 = 10.7 s . For the time interval from t1 = 10.7 s to t2 = 23.2 s , the average acceleration of the dog has magnitude 0.54 m/s2 and direction 25.0 ∘
asked by Noora 
English
1. Make your voice louder. Your voice is too soft. 2. Make your voice high. 3. Make your voice up. 4. ______________________ 5. Speak up. They can't hear you clearly. 6. Raise your voice in reading the text. I can't hear you clearly.
asked by rfvv 
problem solving in RAE
What is the area of a rectangle whose length is 1 unit longer than its width and whose diagonal is 2 unit longer than the width?
asked by JeeAnne 
math
The lunch bill for the 7 guests came to $154. If Jessica paid for 3 of the guests and Aaron paid for the other 4 guests, how much did each pay?
asked by jasmine 
problem solving in RAE
What is the product of 3 consecutive even integers if the middle integer is x?
asked by JeeAnne 
PreCalc
QP is (x y) = (3 1) + r (14 10) QR is (x y) = (3 1) + s (17 9) PR is (x y) = (0 18) + t (5 7) where r, s, and t are scalars. 1. Use vector methods to find the coordinates of P, Q, and R. 2. Find vectors PQ and PR and evaluate PQ*PR 3. Find size of QPR
asked by John 
Algebra, Trig
You are standing at a base of a Ferris Wheel which is 4 m above ground while your friend is riding. The Ferris Wheel is 8m in diameter. Describe how the shape of the sine curve models the distance your friend is to the platform you are on. Identify the
asked by Jay 
World History
In this discussion, you will rank the three individuals from the lesson who you feel most contributed to modern Western society. You will cite two pieces of evidence from the lesson per individual to explain and support your ranking. Help meh please
asked by Anon 
English
1. Will you make your voice higher than usual? 2. I want you to make your voice loud so that the others can hear you clearly. 3. Can you make your voice clear and loud? 4. Can't you read the sentences out loud? 5. You need to read the part as loudly as
asked by rfvv 
world history
What did young men learn in Aztec public schools? Select all that apply.
asked by annie 
world history
What was the penalty for gossip in Aztec society?
asked by annie 
world history
Where were the Aztecs told to build their capital?
asked by annie 
world history
In Aztec society, women were (Choose all that are correct).
asked by annie 
Physics
During the S.H.M of simple pendulum, when the bob comes back to its mean position, the displacement gradually decreases, and eventully becomes zero at the equilibrium position, while it is said that its velocity is still maximum despite of zero
asked by Ubaid ullah hasan 
Maths
Ankit sold two jeans for â‚¹990 each .on one he gains 10% and on other he lost 10% . find his gain or loss percent on whole transaction.
asked by Rahul kumar 
Geography
All of the following are the result of the increase in largescale, green revolution agriculture in the region, except: A. more than 2 million small farmers have been forced to sell their land in Brazil alone since 1985. B. there has been an increase in
asked by Jake 
Algebra (Please help!)
Hey! I've been having a lot of trouble with this, please help! x  7 > 10 x > __ 3x < 20 (underscore under the less / greater than sign) x < __ 5a  2 < 8 a < __ 2t + 8 > 4(t + 1) (underscore under the less/greater than sign) t > __
asked by Carolyn 
Math
Help meh please Check my answers I suck at dis 1. 4y+3≤y+6 Answer=y≤3 2. 2y>2 Answer=y
asked by Memes 
Educational Technology
PLZZZ HELP!! What is the best way to describe how your voice should sound when you read a story out loud? • monotonous, unvaried pitch • monotonous, unvaried speech • loud and slow to accommodate users with poor speaker quality • varied tone of
asked by Reagan 
Scocal studies
Which of the following statements best characterizes the English colony of Roanoke? A. The colonies failed because the settlers wanted to join the Indian tribes as missionaries B. The settlers became wealthy and return to England * C. The settlers enlisted
asked by PLEASE HELP ME 
MATH
GIVEN THAT X=2/3 AND Y =1/5 FIND THE VALUE OF X/Y
asked by NOREEN MALUNGA 
Educational Technology
Which of the following statements is true? • a narrative essay should not include a dialogue • a narrative essay can include a dialogue and should include descriptive language*** • a narrative essay should only be told in third person • a narrative
asked by Reagan 
World History
In this discussion, you will rank the three individuals from the lesson who you feel most contributed to modern Western society. You will cite two pieces of evidence from the lesson per individual to explain and support your ranking. Help meh please
asked by Anon 
Physics
Water is lifted out of a well 30.0m deep by a motor rated at 1.00hp. Assuming 90% efficiency, how many kilograms of water can be lifted in 1 min? Answer is 137kg but can not figure it out.
asked by Kayla 
MATH
find the mean of the data set: 9 4 7 3 10 9
asked by yanna 
math
find each sum or difference 1. 1/2 + 1/3 1. 1/6 2. 1/3 3. 2/3 4. 1/6 I got 2/3 because I added the 2 numerators and got 2 then I kept the LCM as the denominator so I got 2/3. 2. 3 1/5 + 6 1/2 1. 3 2/7 2. 3 7/10 3. 9 2/7 4. 9 7/10 I got number 3
asked by { Alice} please helppp 
Math
A 16 ounce box of cereal costs $4.00. How many cents per ounce does cereal cost?
asked by Gabby 
Math
Cost of 4 books and 5 pens is 32 and cost of 5 books and 4 pens is 31 then find the cost of 1 book B=?
asked by Ehtisham rajput 
Biology
A stock protein sample that has a concentration of 250.0mg/ml. You need to dilute this sample to 20.0 mg/ml in buffer. The final volume of the diluted solution is 5.0ml. how much of the stock protein solution and buffer are required to achieve this? Answer
asked by Matthew 
social studies
what resulted from the loss in value of the constitution of the continental dollar?
asked by Nbutter 
math
Which transformations take f(x)=3x+1 to g(x)=−3x5 ? I think A Question 1 options: a reflection over the yaxis and a translation 4 units up a reflection over the yaxis and a translation 4 units down a reflection over the xaxis and a translation 4
asked by ttng 
Geometry
What is the length of the hypotenuse of a right triangle with legs of lengths 9 in. and 40. A. 41 B. 49 C. 840.5 D. 1,681 I believe it is A, because 9^2 is 81 and 40^2 is 1681 and when you find the perfect square of that it's 41. Am I right?
asked by Anon 
math
Find the slope of the line that goes through the points (6, 3) and (2, 3).
asked by Rachel 
math
Find the midpoint of the line segment with endpoints (3, 10) and (–1, –16)
asked by Rachel 
Math
A biologist has 40% solution and 10% solution of the same plant nutrient. How many cubic centimeters of each should be mixed to obtain 25 cc of 16% solution?
asked by Haley 
science
the position of a particle moving along xaxis is given=5t^210t the distance travelled by particle is
asked by noyf 
math
HOW MANY SMALL SQUARES WITH A SIDE LENGTH OF 1/2INCH WILL FIT INTO A 2 INCH SQUARE? THE TEACHER SAYS 16 I THINK 8 2 INCH SQUARE WOULD BE: 1INCH * 2 INCH = 2 SQUARES * 4 SQUARES please help!!!!!
asked by Shachar 
Chemistry
Describe how to prepare a 500cm3 solution of 0.2moldm3 sodium trioxocarbonate(iv) Give the Apparatus,Method, Theory, Conclusion and precautions.
asked by Favour 
PreCalc
The “Hatch Shell” in Boston has the arch with semielliptical form with a horizontal major axis. The base of the arch is 110foot long and the highest part of the arch is 40 feet above the scene. Find the height of the arch of the “Hatch Shell” 33
asked by Jake 
Math
The major axis of the ellipse lies on the line y=3 and has length 6; the minor axis lies on the line x=–4 and has length 4;
asked by Marie 
English
What are some situations where levity is out of place??
asked by Ahlume 
Math
According to these data, the mean time students spent on the exam was 94.1 minutes, and the standard deviation was 24.23 minutes. Suppose the exam proctor realized after compiling these data that he had used the wrong start time in his calculation, so that
asked by Marquita 
math
The length of a rectangular swimming pool is 24m more than twice its width. The perimeter of the pool is 108m. Determine the dimensions of the pool.
asked by Variable 
Math
The height of the solid cone above is 18 inches and the radius of the base is 8 inches. A cut parallel to the circular bas is made completely through the con so that one of the two results is smaller cone. If the radius of the base of the small cone is 2
asked by Mayyyy 
Math
The following data give the number of keyboards assembled at the Twentieth century electronics company for a sample of 25 days. 45, 52, 48,41,56,46,44,42,48,53,51,53,51,48,46,43,52,50,54, 47,44,47,50,49,52 a.calculate the values of the three quartiles and
asked by Marquita 
Math
Of the students in a certain classroom, 9 are in the school play, 12 are in the orchestra, and 15 are in the choral group. If 5 students participate in exactly 2 of the 3 activities and all other students participate in only 1 activity. How many students
asked by Samuel 
Math
Write a comparison sentence yo represent this equation. 6×7=42
asked by Mia 
math
ABCD is a square and P, Q are the midpoint of BC, CD respectively .if AP =a and AQ=b, find in terms of a and b , the directed line segments (i) AB, (ii) AD , (iii) BD and (iv) AC
asked by seth 
Algebra
S is the set of real numbers that are less than 15 A) 0 < s < 15 B) {s/s < 15} C) {s/s
asked by Heyo 
math
d = mt + b Isolate for M
asked by Variable 
math
During the winter it snows 3 out of every 10 days what is the probability that it will snow, in any given week 7 days, more than 3 times?
asked by josh 
math
Re arrange the formula C = 15n + 250 to express N in terms of C
asked by Variable 
math
7^2 + 24^2 =??? Please someone help!!!!!
asked by bob 
History
During the Renaissance, the philosophy of humanism swept through Europe (1). Humanism resulted in advancements in art, science, and education (2). Humanist ideals also mimicked ancient Egyptian government structures (3). Humanists believed in the idea of a
asked by malia 
math
After years of teaching, I can say (with 100% made up certainty) that the average number of questions the typical student can complete per minute is 5.Â If I choose any student at random (I'm looking at you), what is the probability that yo...er that
asked by josh 
History
Which accurately describe ideological differences between Catholicism and humanism during the Renaissance? (Select all that apply.) catholicism promoted the individual as the center of existence, whereas humanism promoted god as the center of existence
asked by malia 
Math
A snack mix contains toasted oat cereal, pretzels, and nuts in a ratio of 2:2:1 by mass. What mass of each ingredient is needed to make the following amounts of snack mix? a)330g b)210g c)500g d)750g
asked by Emily 
History
The Renaissance positively impacted education in Europe (1). During the Renaissance educational methods changed from passive rote recitation to active analysis (2). Advancements in education spread literacy and led to new innovations and knowledge (3). In
asked by malia 
mte
Find the slope of a line parallel to the line through the given points. (5,5) and (6,2)
asked by Anonymous 
math
at a supermarket, pineapple juice sells at $1 per pint (16 oz). Greg wants to buy eighteen 40ounce cans of pineapple juice from the supermarket. How much does he has to pay altogether.
asked by teresa 
Math
Two cars are 30 miles apart and moving toward each other on the same highway. One car is going 10 miles per hour faster than the other. How fast is each of the cars going if they pass each other 15 minutes later?
asked by Glenn 
Math
Professor Beaker has a 50milliliter solution containing 60% acid. How many milliliters of pure water should he add to this solution to produce a solution containing 40% acid?
asked by Glenn 
Social Studies
What is article 2 in the constitution about?
asked by School123 
Living environment
Why are there some common organelles across all cell types and how is that related to their functions? Why do some cells have specialized organelles and how is that related to their functions?
asked by Anonymous 
5th grade LA
Identify the preposition. 1. He was bitten by the dog with the red collar. a: by, with 2. Take the fire escape on the side of the building. a: on, of 3. He brushed his hair with the brush from the dollar store. a: with, from 4. The robot with the mohawk
asked by Jared 
Math
Mr.stein is purchasing 2.25 pounds of meat that vists$2.80 per pound.How much change should Mr.stein receive if he gives the cashier $20.00 F. 6.30 G 13.70 H 14.95 J. 2.52
asked by Edith 
Chemistry
Find the equilibrium constant for the following reaction: DGlucose (aq) 2L (+) lactic acid (aq) ΔG ° for DGlucose= 914.5kJ/mol ΔG ° for lactic acid = 538.8kJ/mol Would I just use the ΔG° =RTlnK?
asked by Heidi 
english
. Identify the sentence that is correctly punctuated. a. Word Processing and Excel: those are the technology job requirements. b. Word Processing, PowerPoint, and Excel, those are the technology job requirements. c. Word Processing and Excel; those are the
asked by steve 
Physics
On vacation, your 1400kg car pulls a 560kg trailer away from a stoplight with an acceleration of 1.85 m/sz. (a) What is the net force exerted on the trailer? (b) What force does the trailer exert oc the car? (c) What is the net force acting on the car?
asked by Kristi 
Social Studies
What was Alexander Hamilton’s main reason for insisting that all the nation’s debts must be paid in full?
asked by help 
History
What best describes the outcome of the Spanish Inquisition? christian armies defeated Muslims for control of Spain muslims defeated Christians armies for control of Spain the holy roman empire defeated the Visigoths for control of Spain Visigoths defeated
asked by malia 
english
Mr. ________ profitandloss report is due tomorrow. a. Jones’s b. Jones’ c. Joneses’ d. Jones
asked by steve 
english
Carolyn was thrilled when she found out her new employer offers two ________ vacation time. a. week’s b. weeks c. weeks’ d. week
asked by steve 
Math
How many squares with sides that are 6 inches long are needed to cover a square with a side length of 30 inches without overlaping?
asked by Noah 
English
Describe one of the strongest literary images (not a picture or drawing from the reading) you encountered from any of the following literature: • from Of Wolves and Men by Barry Holstun Lopez • from “An Inconvenient Truth” by Al Gore • "The
asked by Sav 
english
Choose the correct sentence. a. Him and I went through a lot together. b. My boss asked my coworker and I to stay late. c. Jennifer stormed out of the house and slammed the door because she and her mother got into an argument. d. Who should I send this
asked by steve 
History
where did humanism originate from?
asked by malia 
Algebra and Geometey
Hi can someone explain what is meant by the inverse of a transformation
asked by Katherine 
History
What was a prevailing characteristic of Renaissance architecture? renaissance architecture followed classical Grecoroman design renaissance architecture used a Byzantinestyle known as Romanesque renaissance architecture included building decorated with
asked by malia 
Spelling
What is a synonym for a 'car at the head of the train'? (Has to have six letters and the 'J' sound in it)
asked by Do I have to tell you? 
History
Which accurately describe scientific advancements during the Renaissance? (Select all that apply.) invention of the printing press invention of the microscope invention of the telescope invention of the steam engine i think its a,b,c
asked by malia 
Socioloy
Why is the 1970s considered to be a decade of change for the American media?
asked by Jake 
math
what is the property of 7(2p)=147p
asked by bob 
Subject
What is a synonym for something you use with a credit card?(has to end with an E and have the "J" sound)
asked by Hi 
Math
what property is 7(2p)=147p Can you please answer this question ASAP please?
asked by skylar 
Math
How would I write and solve a subtraction problem that involves regrouping and includes Ted having $304 in savings
asked by Aiden 
Spelling/Language Arts
What word means "To overpass across water?" It has to have the J sound.
asked by Zoey 
Chemistry
If E=hv and h is joules per second and v is waves per second, the end unit is J/s^2, but E can only be Joules, not s^2. How do I fix this?
asked by Lauren 
chemistry
Hydroselenic acid in formula form is H2SeO4?
asked by Kevin 
math!:D
which set represents pythagorean triple? A.27,38,42 B.33,44,55 C.35,38,42 D.68,72,81 Someone please explain the answer??
asked by Pre A 
P.E
The right amount of exercise in a day someone should do is: ???? A. 10 minutes B 1 hour C 30 minutes D 1 hour and 45 minutes I think it's 1 hour? that's what my friends do . . .
asked by Person who wants help from people 
Math
An 85yearold woman in Rotorua, New Zealand, won't have to pay her library fine. A book she borrowed from the local library in 1945 was found during a move. Based on the borrowing rules pasted inside the front cover of the book, the fine should have been
asked by Jesse 
Math helppp
The area of a playground is 64 square yards. The length of the playground is 4 times longer than its width. How can I solve this?
asked by Jessica 
algebra
Tickets to a sporting event cost $6 for children and $8 for adults. The total revenue from the tickets sold was $2340. There were 320 total tickets sold. How many children’s tickets were sold?
asked by Brooke 
Chemistry
If 17.0 g Al reacts with 25.0 g O2, how much excrsss reagent will remain? 4Al + 3O2 —> 2 Al2O3
asked by Anonymous 
La
In this discussion, you will talk about belonging to a place and of the information, or understandings, that belonging involves. What must people know or understand about a place in order to belong there? How do they gain that knowledge or understanding?
asked by guess who 
math
what is the GCF or greatest common factor of 18,27,30
asked by Keira 
Physics
The city is trying to figure out how long the traffic light should stay yellow at an intersection. The speed limit on the road is 45.0 km/h and the intersection is 23.0 m wide. A car is traveling at the speed limit in the positive direction and can brake
asked by Mariam 
Physics
The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the ball, giving it an initial velocity of 3.6 m/s. The ball rolls a distance of 5.0 m and is then intercepted by a South Korean player. If
asked by Mariam 
Physics
A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 2.10x10^2 s, but in that time it goes from rest to a velocity of 4.00×10^3 m/s.
asked by Mariam 
Physics
A sailboat is moving across the water at 3.0 m/s. A gust of wind fills its sails and it accelerates at a constant 2.0 m/s2. At the same instant, a motorboat at rest starts its engines and accelerates at 4.0 m/s2. After 3.0 seconds have elapsed, find the
asked by Mariam 
Maths
The distance between aerodromes A and B is 1000 Nautical Miles. At 09:00 an aircraft leaves for B with a speed of 300 Nautical miles per hour. At 09:30 another aircraft leaves for B from A with a speed of 400 Nautical miles per hour. At what approximate
asked by Mithun raj