Sunday

December 4, 2016
Total # Posts: 53

**Math**

A radioactive material has a half life of 500 years. A) Given 20 grams of this material, how much will remain after 1,000 years? B) Given 100 grams of this material, how much will remain after 750 years? Thank you to whom ever can help me :)

*October 29, 2016*

**Science**

Sound travles at a speed of 340 m/s how long does it take to travel 850 m

*September 7, 2016*

**calculus**

A ladder 29 feet long leans against a wall and the foot of the ladder is sliding away at a constant rate of 3 feet/sec. Meanwhile, a firefighter is climbing up the ladder at a rate of 2 feet/sec. When the firefighter has climbed up 6 feet of the ladder, the ladder makes an ...

*February 19, 2016*

**math, if i have correct answer**

Prove the identity: tan^2O/ 1 + tan^20 = sin^20 I get 1=1, but others have got sin^2=sin^2 Who's right?? Because there is no answer for this question at the back of the book

*April 27, 2015*

**math**

Prove the identity: tan^2O/ 1 + tan^20 = sin^20 I get 1=1, but others have got sin^2=sin^2 Who's right?? Because there is no answer for this question at the back of the book

*April 27, 2015*

**math**

Solve each equation for 0<_ 0<_ 2pi(3.14) A) 2cos^20 - sin0 -1=0 My answers: sin0= -1/2 or sin0=1 so 0 = 7pi/6, 11pi/6 and pi/2 But the back of the book says: pi/6, 5pi/6 and 3pi/2

*April 27, 2015*

**science**

What is the density value of octane at the pressure of 101.325kpa and temperature of 298K?

*February 23, 2015*

**music appreciation**

3. When you hear a recurring melody in a programmatic piece like Symphonie fantastique, you're experiencing which of the following?

*October 25, 2014*

**Biology**

If Ms. Brown were serving as a donor, what ABO blood types could receive her blood safely? Ms. Brown has A+ blood type

*September 22, 2014*

**math**

I don't know

*January 22, 2014*

**science(CHECK ANSWERS)**

No They're right.

*January 10, 2014*

**math**

its 5th grade math, what other way can i show it

*October 21, 2013*

**math**

how did you get #8a, can you help me step by step please

*October 21, 2013*

**math**

three times as many children as adults attended a concert on saturday. an adult ticket cost $7 and a child ticket cost $3. the theater collected a total of $6000. how many people bought tickets?

*October 21, 2013*

**math**

its 5 grade math, can you make it more understanding

*October 21, 2013*

**math**

the cost of 5 similar digital cameras and 3 similar video cameras is $3213 each video camera costs 4 times as much as each digital camera. john buys a digital camera and a video camera. how much does he pay?

*October 21, 2013*

**math`**

mr. jacob is 55 years old and tony is 7 years old. in how many years will mr. jacobs be 4 times as old as tony?

*October 21, 2013*

**math**

naomi macy and sebastian have 234 stamps in all. naomi gives 16 stamps to macy and 24 stamps to sebastian. naomi then has 3 times as many stamps as macy, and macy has twice as many stamps as sebastian. how many stamps does naomi have at first?

*October 20, 2013*

**math**

on a farm, there are some cows and some chickens. if the animals have a total of 40 heads and 112 legs, how many cows are there?

*October 20, 2013*

**math**

jane had $7 and her sister had $2. their parents gave each of them an equal amount of money. then, jane had twice as much money as her sister. how much money did their parents give each of them

*October 18, 2013*

**math**

apples are sold at 3 for $2 at busy mart. at big food, the same apples are sold at 5 for $2. kassim buys 15 apples from big foods instead of buys mart. how much does he save?

*October 18, 2013*

**algebra**

how many times can you make a perimeter of 10?

*October 8, 2013*

**MATH**

Find the slope of the line that passes through the given pair of points. (-1, 2) and (3, 4)

*September 13, 2013*

**algebra**

If a line L1 has equation y = mx + b, where m and b are constants with m ¹ 0,then an equation of a line L2 perpendicular to L1 has the form , where C is a constant.

*September 5, 2013*

**english**

carol has died, begin death

*May 9, 2013*

**physics**

what is electric power?

*February 27, 2013*

**MINE Math**

Am i right?

*December 6, 2012*

**MINE Math**

i think the anser is 200$

*December 6, 2012*

**MINE Math**

16. Calculate the interest earned on a savings account with $800.00 that is invested at 5% annual simple interest for 5 years. (1 point)

*December 6, 2012*

**statistics**

The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam. Calculate the correlation coefficient r.

*September 28, 2011*

**Math**

A ball is thrown off a cliff from a ht of 180 ft above sea level. The ht s of the ball above sea water level at time t is s(t)=-16t2+32t+180. When will the ball strike the water?

*September 5, 2011*

**Spanish 1-Please check**

It goes like this: La Clase de Economia and La Clase de Anatomia

*September 5, 2011*

**Spanish 1-Please check someone**

1. Me gusta nadar y correr en patineta 3. Me gustan las hamburguesas con papas fritas o la paella. Me gusta comer en restaurantes pequenos y rapidos

*September 5, 2011*

**BIO/CHIM**

How many grams of sucrose would you need to prepare 10 mL of .01M solution of sucrose(FW+342g/mole)? show your work

*September 1, 2011*

**bio**

how many grams of sucrose would you need to prepare 10 mK of ,o1M solution of sucrose(FW+342g/mole)? show your work

*September 1, 2011*

**English**

Dainel decide before he was tempted

*July 20, 2011*

**Maths**

How many 1's go into 4??

*May 25, 2011*

**Chemistry**

Zn(s) + 2 HCl(aq) H2(g) + ZnCl2(aq) When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP? 1. 0.382 L 2. 0.0171 L 3. 22.4 L 4. 8.56 L 5. 4.28 L

*February 19, 2011*

**functional english**

How can i describe three different scenarios where stress can build up and affect a person? Also i have no idea on how to start! please help?

*January 1, 2011*

**fuctional english level 2**

Describe three scenarios where stress can build up and affect a person. Can someone help me on how to describe a scenario? Examples?

*December 23, 2010*

**physics**

A hotdog vendor named Sam is walking from the southwest corner of Central park to the Empire State Building. He starts at the intersection of 59th Street and Eighth Avenue, walks 3 blocks east to 59th Street and Fifth Avenue, and then 25 blocks south to the Empire State ...

*December 5, 2010*

**biology**

a fruit is most commonly _______? A. modified root B. a mature female gametophyte c. mature ovary d. a thickened style e. enlarged ovule

*December 4, 2010*

**biology**

thanks so much I like it that you did not just put the correct answer but gave me sights it really helps me learn. the answer i have to the worksheet is the use of chlorophylls a and b, starch as a major stored compound, and cellulose in cell walls does that sound right?? ...

*December 2, 2010*

**biology**

what are the characteristics that link plants with green algae??

*December 2, 2010*

**Algebra: Simple Interest**

Problem: Geoff has $5000 to invest. He wants to earn $568 in interest in one year. He will invest part of the money at 12% and the other part at 10%. How will he invest. +I already know how to do Simplest Interest, I just can't read the problem to find what i = p = r = t =

*November 22, 2010*

**Math**

Divide first since you do it left to right so 12/6 = 2 2 x 3 - 5 6 - 5 =1

*November 22, 2010*

**Algebra**

Ohhh I get it! Thank you :D It took be 45seconds to figure that out, after you helped.

*November 22, 2010*

**Algebra**

There are two similar triangles XYZ, and ABC. If x = 8, c = 5, and y = b, find z and a. How am I suppose to solve this problem if y = b? Do I find what b is first? Or will the answer be with a variable?

*November 22, 2010*

**Algebra**

There are two similar triangles XYZ, and ABC. If x = 12 and z = 3c, find a. How do I work with that problem when z = 3c?

*November 22, 2010*

**Maths**

What is 8.2% as a fraction in it's lowest term Please someone kindly help!

*November 14, 2010*

**government**

what are 2 examples(policy positions) in which the obama administration has worked to the advantage of corporate interests?

*April 7, 2010*

**maths**

there are 24 hours in a day and scientists tell us that we should sleep for 3/8 of the day.how much time should we spend sleeping?

*March 15, 2009*

**Paris**

Need help finding a good website on Paris? Ones I find always are the same info or are just adds for places you can stay in paris. These sites have a lot of information about the history of my favorite city plus the backgrounds of some of its most famous attractions. http://en...

*March 30, 2007*

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