Wednesday

August 5, 2015

August 5, 2015

**12th grade Physics**

charges of +1.000 C are located at the corners of a 45-45- right triangle which has a hypotenuse that is 1.414 m long. Determine the resultant force on the charge located at the vertex of the right angle.
*Tuesday, December 15, 2009 by Sasha*

**12th grade Physics**

the force between two charges is 20.0 N. if one charge is doubled, the other is tripled, and the distance between them is halved, calculate the resultant force between them.
*Tuesday, December 15, 2009 by Sasha*

**12th grade Politics**

United States is the only sizable industrialized country that does not have a socialist party as a major source of power. Why is this??? Can someone please give me some points or reasons??? Thank you!!
*Wednesday, November 4, 2009 by Anonymous*

**12th grade Advanced Functions**

A generator produces electrical power, P, in watts, according to the function: P(R)= 120/ (0.4 + R)^2 where R is the resistance, in ohms. Determine the intervals on which the power is increasing.
*Sunday, October 25, 2009 by Anonymous*

**12th grade chemistry**

Thanks for your answer DrBob. I am still stumped.The question I was asked to answer is Do acetic acid and stearic acid undergo controlled oxidation reactions? Explain why/why not and draw an equation to illustrate the answer.
*Sunday, October 4, 2009 by paul*

**12th grade A.P. Economics**

which of the following is the most essential for a market economy? 1.) functioning labor unions 2.) good government regulation 3.) active competition in the marketplace. 4.) responsible action by the business leaders. I think its choice no. 3, am i right?
*Sunday, September 13, 2009 by Emma*

**12th grade**

which does suzuki in "hidden lessons" explore more thoroughly, the causes of children's negative or positive attitudes toward nature or the effects of these attitudes?
*Tuesday, July 14, 2009 by Anonymous*

**12th grade Social Science**

Can anyone help me with these questions? How was the culture of the Baby Boom so different from that of previous generations? Why are members of Generation X frustrated with Baby Boomers? What are some of the important impacts of Generation Y on the economy? What are the main ...
*Monday, July 6, 2009 by Derek*

**12th grade**

Penn Foster Examination #93051 Cooking Appliances I've gotten 16 out of 25 completed but I'll just post the whole exam to make sure I have THOSE right. Thanks for your help guys!
*Saturday, May 23, 2009 by Daniel*

**12th grade**

List 3 problems of Decentralized power that existed under the Articles of Confederation. For each problem, identify one solution that the Constitution provided to address the problem.
*Thursday, February 5, 2009 by K*

**12th grade Chemistry**

Mix 5mL of 0,002M Fe(NO3)3; 3mL of H2O; and 3mL of 0,002M KSCN.... how can you find the initial concentration of Fe and SCN??
*Sunday, January 11, 2009 by Chris*

**12th grade IPT**

i need to gather information about E-commerce and there are questions i don't get. such as, how is the communication system is used and discuss some situations in which the system is used?
*Friday, December 5, 2008 by Anonymous*

**12th grade science (food & nutrition)**

Were doing a class debate on vegetarianism and i'm supporting vegetarianism (pro side) and i need 10 question to ask the con side (against vegetarianism). Don't really know how to start.
*Sunday, November 23, 2008 by Clue?!*

**12th grade chemistry**

A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL sample required 31.0 mL of a 0.0185mol/L solution of potassium dichromate. Calculate the percentage of iron in the wire.
*Monday, November 10, 2008 by jerry*

**12th grade calculus**

Let f(x)=[x^3-9x] [] --- absolute value a. does f'(x) exist? b. does f'(3) exist? c. does f'(-3) exist? d. determine all extrema of f.
*Tuesday, November 4, 2008 by dt*

**12th grade calculus**

find the lines that are tangent and normal to th ecurve at the point given 1. 2xy+piesiny=2pie (1, pie/2) 2. x^2cos^2y-siny=0 (0, pie)
*Sunday, October 19, 2008 by elley*

**12th grade calculus**

find points on the curve x^2+xy+y^2=7 (a) where the tangen is parallel to the x-axis adn (b) wehre the tangent is parallel to athe y-axis. (in this case, dy/dx is not defined, but dx/dy is. what value does dx/dy have at these point?)
*Sunday, October 19, 2008 by -*

**12th grade Physics**

"If a skier coasts down a slope at an angle of 24 degrees below the horizontal, what is her acceleration if the force of friction is negligible?" I must have done this question 15 times, and still can't get the right anwser. Can anyone help me?
*Monday, October 13, 2008 by solexgirl12*

**12th grade Physics**

A bird accelerates from 5 m/s,north to 25 m/s,north in 4s. A) What is the bird's acceleration vector? B) How far and in what direction does the bird travel in this interval? C) What is the bird's average velocity?
*Tuesday, October 7, 2008 by Kimberly*

**12th grade Physics**

In an experiment, a car taveling at 88m/s,west slams into a wall and comes to a halt in 0.75 seconds. What is the car's acceleration vector?
*Tuesday, October 7, 2008 by Jane*

**12th grade**

If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x) I'm not sure if I am putting it in my calculator correctly because I keep getting a line. Is that right? If I put it in with the parentheses differently, I get the graph of f(x)=1/x. Does anyone know ...
*Thursday, September 18, 2008 by Natalie*

**math**

I have a question I would really appreciate the answer. If 15% of my grade is 74% and 96 is 15% of my grade and 40% of my grade is a 60.5% without the final counting for 30% what is my grade? Please help thank you.
*Friday, June 26, 2015 by kim*

**12th Grade Physics**

Ben pulls a rope that is attached to a wagon with a magnitude of 300N. He pulls it in a way that te rope is at an angle of 30 degrees from the horizontal. The mass of the wagon is 2kg and the mass of Mike, who sits on the wagon, is 20kg. While the wagon moves to the right, the...
*Thursday, August 28, 2014 by Ana*

**MATH**

there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal amount)
*Monday, March 24, 2014 by MANISH*

**Math - PreCalc (12th Grade)**

Which rectangular equation corresponds to these parametric equations? x = 0.2sec t and y = -0.25tan t A) 25x^2 − 16y^2 = 1 B) 25x^2 + 16y^2 = 1 C) x^2 − 16y^2 = 25 D) 25y^2 − 16x^2 = 1 E) 4x^2 − 16x^2 = 1
*Monday, March 24, 2014 by Anonymous*

**Math - PreCalc (12th Grade)**

If the distance covered by an object in time t is given by s(t) = 2t2 + 3t, where s(t) is in meters and t is in seconds, what is the average velocity over the interval from 2 seconds to 4 seconds? A) 15 meters/second B) 14 meters/second C) 13 meters/second D) 12 meters/second ...
*Friday, March 21, 2014 by Shawna*

**Math - PreCalc (12th Grade)**

Which statement about a uniform probability distribution defined on a given interval is true? A) The mean is always 0. B) The mean is always 1. C) The standard deviation is always 1. D) The mean is the midpoint of the interval. E) The standard deviation is equal to the width ...
*Friday, March 21, 2014 by Shawna*

**Math - PreCalc (12th Grade)**

If the length of the minor axis of an ellipse is 6 units and the length of the major axis is 10 units, how far from the center are the foci located? A) 4 units B) 2 units C) √4 units D) √8 units E) 5 units
*Wednesday, March 19, 2014 by Shawna*

**math **

Leila, Larry, and Cindy are running for 12th grade class offices. They will be named to the positions of president, vice-president, and secretary according to the number of votes each receives. The person with the most votes will be president, the person with the second-...
*Thursday, May 9, 2013 by Anonymous*

**math help please??**

Patsy has cheerleading practice on every fourth school day. She wants to be in the school play, but they have practice on every sixth school day. If both started on September 5th, what would be the first date that she has to choose between cheerleading and play practice? LCM 4...
*Wednesday, December 5, 2012 by Kristin & Tia*

**Physics**

12th grade physics ap question. A baseball with a mass of 120 g is hit 21.8 m into the air. The ball is caught by the third baseman 2.5 m above the ground. What potential energy did the ball develop at its highest point? How much potential energy did it still have when it was ...
*Wednesday, October 24, 2012 by Ravin*

**c++**

Write a program that asks the user to input a grade that he or she received on an exam. The grade is an integer from 0 to 100 inclusive. The program should convert the numeric grade into the equivalent letter grade. Do the conversion by using a function Letter_Grade () that ...
*Friday, May 18, 2012 by jermaine*

**Physics (12th Grade)**

In changing the state of a system from state A to state B adiabatically the work done on the system is 322 J. If 100 cal f heat are given to the system in bringing it from state A to state B, then what will be the work done on the system in this process?
*Monday, April 9, 2012 by Tulika*

**Math Lit **

In a school there are 122 grade 8s, 105 grade 9s, 134 grade 10s, 109 grade 11s, 90 grade 12s. Express Each Class as a percentage of the whole school.
*Sunday, February 5, 2012 by Thabo*

**math**

paid before February 12th the social cost $2.00. If you paid at the door the social cost $5.00. Altogether, 110 students attended the social collecting a total of $454. How many students paid before February 12th and how many paid at the door?
*Sunday, November 27, 2011 by Anonymous*

**Calculus 12th grade (double check my work please)**

2- given the curve is described by the equation r=3cos ¥è, find the angle that the tangent line makes with the radius vector when ¥è=120¨¬. A. 30¨¬ B. 45¨¬ C. 60¨¬ D. 90¨¬ not sure A or D 2.) which of the following ...
*Sunday, March 6, 2011 by anon*

**12th grade**

Firm A offer 40,000 salary with $2,000 increase evey year. FIRM B offer 38,500 salary with 5% increse every year. After how many year he will make same money?
*Monday, December 6, 2010 by d*

**12th grade**

A farmer has 100 yards of fencing to form two identical rectangular pens and a third pen that is twice as long as the other two pens, as shown in the diagram to the right. All three pens have the same width, x. Which value of y produces the maximum total fenced area?
*Thursday, December 2, 2010 by Richard Steele*

**12th Grade Calculus**

1. a.) Find an equation for the line perpendicular to the tangent curve y=x^3 - 9x + 5 at the point (3,5) [* for a. the answer that I obtained was y-5 = -1/18 (x-3) ] b.) What is the smallest slope on the curve? At what point on the curve does the curve have this slope? c.) ...
*Sunday, November 28, 2010 by Eliza*

**12th Grade English**

We have to find the synonym of the word in bold. I have a few choices but I'm stuck between two.. The words in bold are incumbent upon the phrase reads: incumbent upon all officials Deciding to choose between a) the duty of b) the term of office of
*Sunday, November 21, 2010 by Leanna*

**12th grade**

Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3. However, the different individual atoms that make up the element have very different melting temperatures and densities. The unknown substance is most likely a what?
*Friday, November 19, 2010 by Chelsie*

**12th grade**

Wheat is falling from a chute onto a level floor at a rate of 8pi ft3/min to form a conical pile. If the height of the pile is always equal to the radius of its base, at what rate is the radius increasing when the pile is 8 ft deep?
*Saturday, November 6, 2010 by Nazish *

**12th grade**

You're riding on a train that's moving at 50 km/h, and you roll a ball down the aisle at 2 km/h in the same direction as the train is moving. If a person standing on the ground near the train track could see the ball, how fast would it appear to be moving?
*Tuesday, November 2, 2010 by Anonymous*

**12th grade**

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of 13 m/s. The cliff 42 m above the water’s surface With what speed does the stone strike the water? Answer in units of m/s..
*Wednesday, October 27, 2010 by robert*

**12th Grade Calculus**

When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t. If the release point is 300 ft above ground, what is the velocity of the ball at the time ...
*Wednesday, October 27, 2010 by Leanna*

**12th grade-chemistry**

what mass of lead (ii) iodide (pbl2, mass=461 amu)is precipitated by the addition of an excess of potassium iodide (ki, mass=166 amu)to 50.0 ml of 0.60 m lead (ii) nitrate (pb(no3)2, mass=331.2 amu)?
*Wednesday, October 20, 2010 by ashlee*

**12th grade**

A certain parallel plate capacitor consists of two identical aluminium plates each of area 2times 10^-4 m^2.the plates are seperated by a distance of 0,03mm, with air occupying the space between the plates. 1-CALCULATE THE CAPACITANCE OF THE CAPACITOR. AND 2-CALCULATE THE ...
*Sunday, October 10, 2010 by Masixole4Lydia*

**12th grade**

The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the length (the longer side) of the rug be?
*Friday, September 24, 2010 by Anonymous*

**12th grade maths**

make x the subject y=r-qp/(x) is the ans x=-qp/(y-r) make the subject (p) p+3=qp+r/(2) is the ans p=r-6/(2-q)
*Tuesday, September 7, 2010 by adam*

**12th grade maths**

just like to check if ive got these right. if not can you help?? make the subject (q) p(q+r)=2(q-p) ans q=pr+2p/(2-p) make the subject (p) p+3=qp+r/(2) ans p=r-6/(2-q) make the subject (r) p(r-q)=2+3(q-r) ans r=2+3q+pq/(p+3) make the subject (x) y=r-qp/(x) ans x=r-qp/(y)
*Monday, September 6, 2010 by adam*

**12th grade maths**

just like to check if ive got these right. if not can you help?? make the subject (q) p(q+r)=2(q-p)ans q=pr+2p/(2-p) make the subject (p) p+3=qp+r/(2) ans p=r-6/(2-q) make the subject (r) p(r-q)=2+3(q-r) ans r=2+3q+pq/(p+3) make the subject (x) y=r-qp/(x) ans x=r-qp/(y)
*Monday, September 6, 2010 by adam*

**12th grade**

The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the length (the longer side) of the rug be?
*Wednesday, July 21, 2010 by Anonymous*

**12th grade**

The Swiss franc is selling for $.7681 and the British pound is selling for $1.6581. The cross rate between the franc and the pound is? I figured out 2.16 but I have so much scribling over it I cant now refigure it out with our gettting it correct again. Can someone simplify ...
*Wednesday, May 12, 2010 by katrina*

**12th grade**

a tortoise and a hare are running in a race you are asked to prepare graps similar to those in your reading material to graph the progress of each animal during the race. as in the text, distance is the vertical scale of your graph and time is the horizontal scale. the ...
*Wednesday, February 24, 2010 by pam turner*

**12th grade**

In a TV set, a beam of electrons is shot horizontally from the rear of the TV tube toward the screen with a speed about 1x10^7 m/s. If the distance from the rear of the TV set to the front is .5m, approximately how far do the electrons drop because of the gravity as they move ...
*Wednesday, February 17, 2010 by Rae Lee*

**Math - average grade**

Does anyone know how to calculate average point grade? I have the following data: grade D - 2 students - 4,9 percent grade C - 6 students - 14,7 percent grade B - 12 students - 29,2 percent grade A - 21 students - 51,2 percent What is the average grade? This is NOT my homework...
*Wednesday, February 17, 2010 by refy*

**12th grade**

The legnth of a rectangular floor is 2 feet more than it's width. The area of the floor is 168 square feet. Kim wants to use a rug in the middle of the room and leave a 2 foot border of the floor visible on all sides. What should the legnth of the rug be?
*Tuesday, January 19, 2010 by Mady*

**12th grade**

Decide whether each of the following is a characteristic of the North-Puritanism,South-Gentleman planters or both the north and the south. Came to America to find freedom to worship and the promised land - The North-Puritanism; The South-Gentleman Planters; or Both.
*Tuesday, December 29, 2009 by Anonymous*

**12th grade AP Politics**

What are some of the illegal ways to add amendments to the Constitution? Why are these ways prefered rather than the legal methods? Please help...I found the legal ways but don't know the illegal one. I have searched google but they don't have any answer. Thank you!!!
*Monday, November 30, 2009 by Anonymous*

**12th grade (Physics)**

A highway is to be built between two towns, one of which lies 44.0 km south and 74.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
*Wednesday, October 21, 2009 by Lynnie*

**12th grade**

i have to write my essay about "the wife of Bath's tale" and first i need to explain how " the wife of Bath's tale"' can be read as both a pro-feminist and an anti-feminist stroy" second, provide an arguemtn as to which I believe the story ...
*Monday, October 5, 2009 by Irene*

**12th grade**

prove that normal to plane containing 3 points whose position vectors are a vector,b vector,c vectorlies in direction addition of cross product of vectors b and c and cross product of vectors c and a and cross product of vectors a and b
*Tuesday, September 22, 2009 by parth*

**12th grade A.P.Economics**

Identify the trade-offs and opportunity cost of a decision using a decision-making grid. I know how to make a decision-making grid to show the opportnity cost....but how do i identify trade-off and opportunity cost in the grid???? I don't get the question actually...plase ...
*Wednesday, August 19, 2009 by Ami*

**12th grade- Social Science**

I need help in making a hypothesis statement for a certain topic, I chose at school. Can anyone give me an example of one? Here is the format, my teacher wants: (The - represents the boxes, he put for each) TOPIC: - - OVERVIEW OF TOPIC: A brief description about your topic...
*Friday, July 3, 2009 by Derek*

**12th grade**

Okay I am doing a report on Thurgood Marshall. I am to a part where I am writing a little about his presidential nominations. Please help me on this! What exactly is a second court of appeals judge's job? What about a Supreme Court Justice? I am trying to say maybe a ...
*Wednesday, April 29, 2009 by Jessica*

**12th grade**

how to fid g(4), g'(4) and g''(4) when graph of the function f shown above consist of six line segments. Let g be the function given by g(x))=___ f(t) dt. The ___ is form like f with an x variable at the right top corner and a 0 in the right low corner.
*Thursday, April 23, 2009 by Hugo*

**12th grade**

it takes bill 4 hours to paint a house. it takes john 7 hours to paint the same house. how long does it take to paint the house if they painted it together.
*Thursday, April 9, 2009 by diane*

**12th grade Math-statistics**

The annual sales, in millions, for 28 toy department stores is listed. A)Calculate the mean and standard deviation of the data. Answer to the nearest tenth. B) Calculate the percent of sales to the nearest whole number, that are: i)within one SD of the mean ii)within two SD of...
*Friday, December 12, 2008 by Jodine*

**12th grade**

A Lesson Before Dying " I had gone to barbershops;I had stood on street corners, and i had gone to many suppers in the quarter.But i had never really listened to what was being said.Then i began to listen, to listen closely to how they taked about their heroes, how they ...
*Wednesday, December 3, 2008 by Lenny*

**12th AP Calculus**

find the dy/dx of: x^2=(x-y)/(x+y)
*Sunday, October 19, 2008 by dt*

**12th grade**

Hey I have an exam tomorrow and I cant understand this things.. Help me please .. 1: Derivative using the limit concept 2: Determine a Derivative using the theorems. 3:Evaluate velocity at the beginning and at the end 4: Using implicit derivation and find the normal and the ...
*Tuesday, October 7, 2008 by Sidse*

**12th grade Physics**

A stone is dropped in water from a bridge 44 cm above the water. Another stone is thrown straight down 1.0 s after the first one dropped. Both strike the water at the same time. What was the initial speed of the second stone?
*Wednesday, October 1, 2008 by BioBabe*

**12th grade**

I am stuck on my thesis statement. I am to write a paper about my strengths and weaknesses as a writer. Topic: writer Point:strenghts and weaknesses examples so far The following are my strengths and weaknesses as a writer. I will discuss my strenghts and weaknesses as a writer.
*Tuesday, September 30, 2008 by Kayla*

**maths**

The 5th term of an arithmetic sequence is 11,12th term is 32.What are the first 3 terms?
*Saturday, May 9, 2015 by Anonymous*

**math**

The 5th term of an Arithmetic Progression is 8 and the 12th term is 50. Determine the sequence
*Saturday, April 18, 2015 by marry*

**math**

How do i find the 12th term of the sequence 36,18,9.... using a formula
*Monday, April 13, 2015 by matt*

**math**

How do i find the 12th term of the sequence 36,18,9.... using a formula
*Monday, April 13, 2015 by matt*

**math**

How do i find the 12th term of the sequence 36,18,9.... using a formula
*Monday, April 13, 2015 by john*

**math**

find the 12th term of the sequence 36,18,9....
*Monday, April 13, 2015 by john*

**mathematics concepts**

Fraction symbols can usually be safely introduced A. at the beginning of third grade. B. near the end of first grade. C. near the end of third grade. D. at the beginning of second grade. my answer is c.
*Saturday, February 21, 2015 by Brittney*

**maths**

determine the first three terms of the erithmetic progression of which the 7th term is 3 and the 12th term is -3?
*Thursday, January 22, 2015 by saku*

**Math**

You have an ear infection and are told to take a 200 mg tablet of ampicillin (a common antibiotic) four times a day (every six hours). It is known that at the end of six hours, about 5% of the drug is still in the body. What quantity of the drug is in the body right after the ...
*Friday, December 12, 2014 by Anonymous*

**Math**

You have an ear infection and are told to take a 200 mg tablet of ampicillin (a common antibiotic) four times a day (every six hours). It is known that at the end of six hours, about 5% of the drug is still in the body. What quantity of the drug is in the body right after the ...
*Friday, December 12, 2014 by Anon*

**math**

Allie noticed that to get her test grade, she could take Valerie's grade, multiply it by 2 and subtract 15. If Valerie's test grade was x, how would you write Allie's test grade?
*Thursday, December 4, 2014 by zycuria*

**Math**

Find the 12th term of the arithmetic sequence 2, 6, 10, … .
*Tuesday, June 17, 2014 by Annika*

**Math, Geometry**

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...
*Friday, April 4, 2014 by Luis *

**Math **

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...
*Friday, April 4, 2014 by Jose *

**Math - PreCalc (12th Grade)**

Which statement is true for any linear system of two equations in two variables? A) The system is independent if the slopes of the two lines are equal. B) The system is inconsistent if the y-intercepts of the two lines are equal. C) The system is independent if the graphs of ...
*Thursday, March 20, 2014 by Shawna*

**Math - PreCalc (12th Grade)**

Which combination of limit properties is required to evaluate this limit? lim x->((24/x)-2x+2)^3 A) sum, difference, product, root B) sum, difference, product, power C) sum, difference, quotient, power D) sum, difference, quotient, root E) A limit does not exist.
*Thursday, March 20, 2014 by Shawna*

**math(QUESTION)**

Suzan has a 69 as her grade in a class. If she does a quiz worth 9% of her grade what will her grade be?
*Friday, March 7, 2014 by dalia*

**math**

It says sam test scores for the making period were 60,89,83,99,95,60 Suppose that sams teacher decided to base the marking period grade on the mean. What grade would sam earn? Do you think this is a fair grade explain your reasoning?
*Monday, January 27, 2014 by ingrid*

**5th grade math**

In the fourth grade class at Baker Elementary, 9 students are left-handed. The fifth grade has 7 left-handed students and the sixth grade has 6. The number of students in the fourth grade is 3 times the number of left-handed students in the class. The sixth grade has 3 more ...
*Sunday, December 1, 2013 by Stephon*

**12th grade MATH**

1.)A picture 8 in. by 12 in. is placed in a frame which has a uniform width. if the area of the frame is equal to the area of the picture, find the dimension of the frame (8+2x)(12+2x)-96 = 96 (8+2x)(12+2x)=96+96 96+4x(2)=192 4x(2)=192-96 4x(2)=96 x(2)=96/4 x/2=24/2 x=12 is it...
*Monday, October 7, 2013 by Blue*

**Math**

Approximately 15% of the students in ST130 obtain A grade. If 3 students are selected at random, find the probability that a)all of them obtain A grade in ST130. b)Exactly 2 obtain A grade in ST130. c)at least one obtain A grade in ST130
*Tuesday, August 27, 2013 by Anshu*

**Quantitative Methods**

What will be the 12th and 77th terms in the series 10, 12, 14, 16, ?
*Friday, June 14, 2013 by ram*

**math**

An elementary school collected a total of 240 cans during a food drive. Grade 3 students collected 1/3 of all the cans grade 4 students collected 52 cans, and the rest of the cans were collected by grade 5 students. How many cans did grade 5 collect? A.28 B.80 C.108 D.188
*Friday, March 29, 2013 by elena*

**statistics**

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of the scores, a “B” grade to the...
*Sunday, March 24, 2013 by Sarah*

**math**

write 3.85 x 10 to the negative 12th in scientific notation
*Tuesday, March 5, 2013 by Chance*

**12th science**

How will you prepare potassium per magnate.
*Saturday, February 9, 2013 by chemistry*

**Math**

A coffee dealer mixed 12 pounds of one grade coffee with 10 pounds of another grade of coffee to obtain a blend worth $54. He then made a second blend worth $61 by mixing 8 pounds of the first grade with 15 pounds of the second grade. Find the price per pound of each grade.
*Sunday, October 21, 2012 by Jamese*