Sunday

August 2, 2015

August 2, 2015

Total # Posts: 613

**Calculus**

My teacher wants me to use this formula for half life question C(t) = Ce^-kt but i used a different formula plz help. the question is: A radioactive isotope has a half life of 30 years. If we started off with 10 mg of this isotope 12 years ago: a) Find and expression for the ...
*July 26, 2015*

**math**

sorry I meant this here We'll start really simple, but the next problems will be more challenging. We can get a column of data from a dataframe by typing the name of the dataframe, then the $ symbol, then the name of the column with no spaces in between. First ask what the...
*July 25, 2015*

**math**

How many hours of total sleep are there for the first animal in the table? please help me
*July 25, 2015*

**Information Literacy**

no I didn't
*May 21, 2015*

**Information Literacy**

My resource are Google and textbooks
*May 21, 2015*

** Information Literacy**

can you please check this for me Why do we need information? What sources do you already use to obtain personal information? Information is a resource that has varied definitions according to the format, and media used to package or transfer it, as well as the discipline that ...
*May 21, 2015*

**Strategies for the independent learner**

huge thanks:)
*May 20, 2015*

** Strategies for the independent learner**

1.When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 7.You might want to review as you exercise because A...
*May 20, 2015*

**Strategies for the independent learner**

I appreciate that
*May 20, 2015*

**Strategies for the independent learner**

1.When you approach a text, you should A. survey it, using the technique called SQ3R. B. dive right in at the first page and read the assigned section. C. skip over words you don’t know. D. read only the boldface type. 2.The proctored exams for your degree courses are A. ...
*May 20, 2015*

**math**

there are 3 pizzas .each child will get 1/4 of a pizza.how many children will get pizza?
*May 12, 2015*

**Math**

Bob has designed a rectangular storage unit to hold large factory equipment. His scale model has dimensions 1 m by 2 m by 4 m. By what amount should he increase each dimension to produce an actual storage unit that is 9 times the volume of his scale model?
*April 6, 2015*

**alg. Compounding periods.**

60 months in 5 years?
*March 12, 2015*

**alg. Compounding periods.**

a loan requires that the 4% interest be compounded monthly for 5 years. find the number of compounding periods. 48 60 10 20 ________________________________________ Yolanda deposited $11,000 in a savings account that earns 3.5% onterest compounding daily. Find the compound ...
*March 12, 2015*

**social studies 8th**

The answer to 1 is d, checks and balances are measures that keep all branches of the government equal in power bu giving each branch to overturn some decisions.
*March 11, 2015*

**Chemistry**

Consider the titration of 30.0 mL of 0.100 M NH3 with 0.150 M HCl. calculate the pH after the following volumes of titrant have been added:(a) 0mL (b) 10.0 mL (c) 19.5 mL (d) 20.0 mL (e) 20.5 mL (f) 30 mL
*March 4, 2015*

**Calc**

Find the area in the first quadrant bounded by the curve y=(9-x)^1/2 and the x- and y-axis.
*March 1, 2015*

**Calc**

Find the area in the first quadrant bounded by the curve y=(9-x)^1/2 and the x- and y-axis.
*March 1, 2015*

**Further Maths**

uniform ladder of length 5m and weight 80 newtons stands on rough level ground and rests in equilibrium against a smooth horizontal rail which is fixed 4m vertically above the ground. If the inclination of the ladder to the vertical is x, where tan x is less than 3/4, find ...
*February 27, 2015*

**Math**

an airport mixes and additive into its jet fuel. The ration of fuel to additive needs to be kept the same. Complete the table below for amount of additive required for different amounts of fuel fuel (kg) 63 84 98 add 9(g) 30 42 48
*February 26, 2015*

**Math/ Compouded semiannually ?'s**

Jessica plans to purchase a car in one year at a cost of $30,000. How much should be invested in an account paying 10% compounded semiannually to have the funds needed. a. $27,210.90 b. $3,512.06 c. $24,793.50 d. $27,272.70 The Lee family plans to buy a new house in 2 years ...
*February 24, 2015*

**math**

35. Aaron wants to find an function that relates the price of a pizza to its size. He knows that this function need s to be non- linear. Which function below should he use? A. y=4piex B. y=pie(x-3) C. y=pie(x-3)^2 D. y=pie(x-3)^2+3(x+7)
*February 17, 2015*

**math**

21.Faith solves the equation 3(7x+4)=21x+4. How many solutions does she find? A. Infinitely many solutions B. 2 solutions C. 1 solution D. 0 solutions
*February 15, 2015*

**Algebra**

What is an expression that could be put in the blank so that the inequality would have the same solution set as shown in the graph? -4 < ______ < 16 The graph is is a numberline shaded between -4 and 6, with an open circle on -4 and open circle on 6.
*January 27, 2015*

**Math-please help**

One concert ticket is $5 and the other is $9. There are 500 seats. My expenses are estimated at $4000. Determine equations for income, profit, and expenses if all 500 seats are filled. Are my equations- expenses:y=400 income:4x+2500 profit:y=4x-1500
*January 21, 2015*

**Math!**

On the train we had 41 different kinds of cookies. 3 different flavors of cocoa, and 122 candies. How many treats did we have in all?
*December 21, 2014*

**Math**

Determine which of the following is true for the function X^3+5x^2-8x+3 f(x) has a relative minimum at x = 2/3. f(x) has a relative maximum at x = 2/3 f(x) has a zero at x = 2/3 Both A and C are true. <----- Both B and C are true.
*December 21, 2014*

**Math**

Isaac gets paid $400.00 per week plus a commission $10.00 for every item he sells. Write the equation that shows the relationship between the number of items he sells and his weekly income.
*December 10, 2014*

**Math**

How many 3 digit numbers can you find whose digits have a sum of 4. 112 211 103 301 310 013 031 202 220 022 400
*December 8, 2014*

**Math word problem**

Jeremy has 19 coins of 2 different values. the total value of the coins is $1.00. What are the coins? How many of each coin does he have?
*December 7, 2014*

**Physics**

A person pushes on a doorknob with a force of 5N. The direction of the force is at an angle of 20 degrees from the perpendicular to the surface of the door. The doorknob is located .800m from axis of the hinges of the door. The door begins to rotate with an angular ...
*November 23, 2014*

**physics**

A clock has a second hand whose tip rubs against the inside of the glass cover. If the frictional force between the glass cover and the tip of the second hand is 0.0010 N and the length of the hand is 6.5 cm, what is the minimum torque that must be applied to the second hand ...
*November 21, 2014*

**physics**

A 30-caliber rifle with a mass of 2.80 kg fires a 9.84- g bullet with a speed of 726 m/s with respect to the ground. What kinetic energy is released by the explosion of the gunpowder that fires the bullet?
*November 21, 2014*

**Math**

What is 3.9 x 4.67 equal to?
*November 12, 2014*

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...
*November 12, 2014*

**Physics**

A mass of 2.0kg traveling at 3.0 m/s along a horizontal plane hits a relaxed spring 20cm away from it. The coefficient of kinetic friction is 0.3. The mass is slowed to zero velocity when the spring has been compressed. By how much the spring has been compressed, the spring ...
*November 9, 2014*

**Physics**

A mass of 2.0kg traveling at 3.0 m/s along a horizontal plane hits a relaxed spring 20cm away from it. The coefficient of kinetic friction is 0.3. The mass is slowed to zero velocity when the spring has been compressed. By how much the spring has been compressed, the spring ...
*November 5, 2014*

**Chemistry**

A concentration cell consists of two Sn/Sn2+ half-cells. The cell has a potential of 0.12V at 25 ∘C. What is the ratio of the Sn2+ concentrations in the two half-cells?
*November 3, 2014*

**English**

adjective
*November 3, 2014*

**Chemistry**

Hello. On the homework for my middle school chemistry class, one of the questions asks me to identify "the four classifications of substances". I am having difficulties with this problem.
*October 28, 2014*

**Math**

If the average cost per salaried employee increases by $4,000 in the Kitchen Department, what is the new average cost per employee in the department? (more info: Salaried Employees: Average # of employees: 2 Cost in Thousands: 52 Average Cost/Employee: 26 Hourly: Average # of...
*October 27, 2014*

**math**

Manuel says that you can use of the denominators of 5/6 and 11/30 when renaming these fractions using a common denominator. Why is the true?
*October 21, 2014*

**Math**

estimate the area of the rectangles 5 7/9 by 3 1/5 7 7/8 by 1 1/3 Estimate each product. 3/8 X 4
*October 16, 2014*

**Math **

A rancher with 750ft of fencing wants to enclose a large rectangle area and then divide it into four equal-sized pens to hold animals. If the maximum area is desired to ensure humane treatment of the anima, what should be the dimensions of the larger rectangle. What should be ...
*October 12, 2014*

**Financial Mathematics**

The Z Corporation needs $180,000 in 60 months. If they deposit $2,000 per month for the first 20 months, $2,500 for the next 20 months, and $2,000 + R for the last 20 months, what is R if they can invest at 7%(12)?
*October 2, 2014*

**Language arts**

At the end of her aunts story in the story teller the older girl asked whether the girl in the story would have been rescued even if she had not been good. what does she seem to think is the theme of her aunts story
*September 26, 2014*

**Social Studies (SS)**

What was the relationship between the popularity of rice in Europe and slavery in the Southern colonies?
*September 18, 2014*

**physics**

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 57.3° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 21.5 m away. By how much does the rocket clear the top of the wall?
*September 14, 2014*

**Science**

Thank You so much DrBob222!
*September 8, 2014*

**Science**

Does Earth rotate or orbit each day?
*September 8, 2014*

**AP Physics **

A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.90 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is 340 m/s. Answer ...
*September 5, 2014*

**Science independent variable**

A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment?
*September 3, 2014*

**SOMEONE HELP PLEASE..DUE AT MIDNIGHT**

Can't help. You will need to post one question at a time. Besides, we don't do homework for you. We help, not giving out answers sorry.
*September 3, 2014*

**math**

So is it 96? I don't want to get it wrong for my final score. Hi said that its wrong.
*August 8, 2014*

**math**

Mike gave Danny 4 more marbles than he already had. He now has 100 marbles. How many marbles did Mike give to Danny? I dont no the answer
*August 8, 2014*

**Math**

Find the number of units that produces a maximum revenue. The revenue R is measured in dollars and x is the number of units produced. R = 80x – 0.0001x^2
*June 8, 2014*

**physics**

An astronaut on Triton throws a 0.142 kg baseball straight up with a velocity of 24 m/s. How high does the baseball go?
*June 2, 2014*

**Math 8th Grade!!!!**

27 - (-9) (-2) ÷ 3 * (-4) - 0 - 33 - (-39)
*May 21, 2014*

**Math 8th gr.**

Tysm!
*May 20, 2014*

**Math**

In triangle PQR, <R=90 degrees, <Q=10 degrees and RQ=16 cm. Find PR.
*April 15, 2014*

**Quick Question**

Okay, thank you.
*April 11, 2014*

**Quick Question**

I am trying to find an online radio podcast that middle school students can use to host their own radio show. Can you help me research some?
*April 11, 2014*

**Math**

Oh okay. Thank you. I appreciate it.
*April 3, 2014*

**Math**

John spoke to his friend from 10:15am-11:00am. And then John spoke to that same friend again from 12:30pm-1:15pm. altogether, how many minutes did John speak to his friend? How do I figure this out?
*April 3, 2014*

**science**

Anonymous is wrong. All are correct. I just got 7/7.
*March 22, 2014*

**science(check answers)**

number nine should be air c
*March 21, 2014*

**Math**

For the graph y find both x-intercepts by solving the equation 3x^2 - 24x + 45 =0 a) Direction of opening b)y-intercepts c)Axis of symmetry d) vertex e) max or min
*March 8, 2014*

**math**

For the graph y find both x-intercepts by solving the equation 3x^2 - 24x + 45 =0
*March 8, 2014*

**Math**

the answer is 2 5/6
*February 6, 2014*

**College science**

Im in Chem. but looks like physics.. If a rock climber accidentally drops a 70.5 g piton from a height of 295 meters, what would its speed be just before striking the ground? Ignore the effects of air resistance.
*February 1, 2014*

**physics..**

What is the maximum height achieved if a 0.800 kg mass is thrown straight upward with an initial speed of 40.0 m·s–1? Ignore the effect of air resistance.
*February 1, 2014*

**Chemistry**

alright, thanks lol
*February 1, 2014*

**Chemistry**

Thats what it looks like.. but im taking chem. in college and have never had a physics course, im really lost.
*February 1, 2014*

**Chemistry**

What is the maximum height achieved if a 0.800 kg mass is thrown straight upward with an initial speed of 40.0 m·s–1? Ignore the effect of air resistance.
*February 1, 2014*

**Chemistry**

Thank you x)
*February 1, 2014*

**psychology**

where does spanking fall between punishment and discipline
*January 26, 2014*

**Geography HELP**

HOw do I explain how you would make a scale map of a room in your home.
*November 22, 2013*

**Calculus Fundamental Theorem**

Thank you!
*November 20, 2013*

**Calculus Fundamental Theorem**

Evaluate the definite integral. function: (t+8)(t^2+3) with respect to variable t lower limit: -sqrt(2) upper limit: sqrt(2)
*November 20, 2013*

**Calculus Fundamental Theorem**

Original problem was: absolute value x-13, because of absolute value I made it x+13
*November 20, 2013*

**Calculus Fundamental Theorem**

I tried that way, my answer was wrong
*November 20, 2013*

**Calculus Fundamental Theorem**

Evaluate the definite integral. function: x+13 with respect to variable x lower limit:0 upper limit:22
*November 20, 2013*

**Calculus Sigma Notation **

Find a and n such that: 8+16+32+64+128 (k=a) a=? n=?
*November 10, 2013*

**Calculus-Antiderivative **

Solve the following initial value problem: dr/dt=7cos(pi(t)), r(1/4)=14 r(t)=?
*November 8, 2013*

**Chemistry**

explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 20, 2013*

**Chemistry**

Explain using electron-pushing arguments why glycolysis must go through G6P to F6P step (C1 aldehyde to C1 ketone). Focus on the subsequent aldolase-catalysed reaction and explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 19, 2013*

**Chemistry**

Explain using electron-pushing arguments why glycolysis must go through G6P to F6P step (C1 aldehyde to C1 ketone). Focus on the subsequent aldolase-catalysed reaction and explain why glucose 1,6 bisphosphate would not be able to go through the aldolase reaction.
*October 19, 2013*

**Math, HELP!! UGENT!**

Find the value of k so that the line containing the points (−8,8) and (2,k) is perpendicular to the line containing the points (14,−8) and (9,−6).
*September 14, 2013*

**math**

the lengths of the three sides of a right triangle R have odd integer values and two of the three sides have lengths 3 and 5. What is one possible length of the third side?
*July 23, 2013*

**Calculus**

Evaluate ∬R xy dA, where R is the region bounded by x^2+y^2≤36, x≥0 and y≥0.
*July 7, 2013*

**Chemistry**

Calculate Activation Energy, Ea, for each of the reactions, above? ln(k)= -2.24x10^4(1/T)-1.8. The reactions are Step 1: 2H2 + N2 -> N2H4, Step 2: N2H4 + H2 -> 2NH3, Overall: 3H2 + N2 -> NH3. This is all the information i have. i Don't know how to solve for the ...
*June 4, 2013*

**Math**

(-3xy^2)^2(-2x^5y^3)^3
*June 3, 2013*

**Literature**

In order to get an idea of significant subject areas in a chapter, it is best to read the: A. subheads. B. graphics. C. captions. D. table of contents.
*May 21, 2013*

**Physics**

nearly everybody has witnessed a lunar eclipse, but relatively few people have seen a solar eclipse? why
*May 2, 2013*

**Math 7th Geometery**

yes hieght is 12m Yes 3 rectangles. yes two outside ones equal 31 by 23 Yes smaller one at the base is 23m Yes all right. your awesome! This was a tough one for me. But you helped me see where I was confused. Thank you so much.
*April 24, 2013*

**Math 7th Geometery**

I have a complex figure like a U shape. I understand the formula for this is l x w = a Can you show me the steps? 31m is parael to 31m this would be the height (sides of the U)?? or is this the width? Length 69m Width is on the right top of U 23m. Inside the middle of the ...
*April 24, 2013*

**Justice**

The correct answer is letter C
*April 10, 2013*

**chemistry**

What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?
*March 30, 2013*

**Trig**

Thank you very much!
*March 28, 2013*