studybuddddy

I just can't get this one. Work would be appreciated

A radioactive isotope has a half-life of 40 years. At t=0, there are 100 grams of this substance. Find the amount of this isotope present at time t using an exponential model of decay.

A. y=100e^(ln 2)t/40

B. y=40e^-(ln2)t/100

C.y=100e^-(ln2)t/40

D: NONE OF THESE

I managed to simplify a trig equation down to this, now what? Not sure how to pick at this

I recently bought a Verizon phone and was thinking about selling it online and going back to my old phone. Do I have to wait for the rebate to come back before I can sell the phone online? If the phone is deactivated will the rebate be invalidated ? Or can I just go ahead and mail in the rebate stuff and sell the phone online, and expect some money to come back to me ?

Maybe they are. But they totally have won me over. Do you think they are capable of achieving their dream? Basically these two kids plan to build an orphanage in Pakistan ( here they are explaining their project http://www.youtube.com/user/purefired#p/a/f/0/KFEf... ) What do you think? Just curious..

Anyone have any ideas or resources to check out? This is for AP Euro. Thanks!

I have my license, will be 17 soon. Feel like I'm more than qualified for this job, tons of IT skills. GPA of 4.3

There are job openings in my area , I'm applying online but do I have a shot if I;m only in high school?

So I upgraded my macbooks harddrive and getting out the original harddrive was easy thanks to the tag you pull. I am now trying to get out my upgraded harddrive which does not have a tag, and am finding it impossible! I have tried tape, everything. Any suggestions?

My psych just added Ativan on top of taking Cymbalta. He didn't seem to worry about any interactions but I have read that they can cause CNS depression together. Should I worry at all about this? Thanks

5e^2x = 500

The answer is 2.3026 but I just can't seem to get it.

Please explain what you are doing to solve it.

Thanks!

Very dumb question but is there anywhere that sells blackcats or bottle rockets online? I have only found one dealer but they require a minimum of $150 purchase to ship.

If North Korea nukes us what the he11 am I supposed to do? I know what I am going to do in terms of things I want to do before I die (lose my virginity for one) but after that where do I hide? The basement?

My friend has asked me to sell an actual prop from the original peter pan movie, which is in a frame in pristine condition. It also has a certificate of authenticity. How much do you think it could sell for?

How do you find dimensions of a rectangle if you are given the area (135) and the sides are in a 3 to 5 ratio?

I'll be a Junior next year and originally planned on taking 3 AP's, but 2 got cut for budget reasons. The rest of my classes are fairly tough (all level 1 or advanced). Obviously I will be taking plenty of AP courses for Senior year, which I'm stoked about since their all classes I'd love to take. I am just worried this will impact college acceptances.

Is it worth it to take an A.P. course online? I have been considering this but have had some trouble finding a good place to take a course.

Don't say GET A MACBOOK, been there, done that, now I'm broke

Budget: 500-700ish

Uses- I am a student so tons of word processing and things of that nature. I do a little web designing, photoshop, and video editing so I want a computer that can multitask and handle these programs.

Specs I want: 3-4GB RAM, 320GB HD, 2GHZ

I also don't want a computer with a massive screen as I move around alot. I need something reliable, something stable.

I've looked into Toshiba Satellites, and some other HP computers.

As of now I am considering a refurbished Asus g50vt-x1 for 729 but IDK. Need some help quick. Thanks.

Lately I've been thinking about selling my 2ghz 2GB 110gb(ithink) Macbook for a Toshiba Satellite with 2ghz 4gb Ram and 320gb hard drive. I used to have a PC and I kind of miss it. I have had some trouble with my Mac (programs randomly shutting down, keyboard temporarily shut off) but no problems that needed professional attention( like my old pc). I am about to get into computer programming and have been told PC's are better to learn on. I have played around with some of my friends newer PCs, which don't seem to have the problems as old PCs have. I am not fond of Vista, and will likely downgrade to XP or find a BETA verison of 7. Any insight would be appreciated.

I currently have a very weak ibook g3. Would like to upgrade to a macbook but just dont have the money.

Budget: around 500-600$

Looking for a laptop to do it all. Schoolwork,music,video production,etc.

Something that won't break down.

Fast, lots of RAM and memory

I have adobe photoshop cs3 and was wondering how I can cut out a person from one photo, and place it in another photo.

What are some good tutorial sites?

Thanks

It functions perfect. Cosmetically it is a little worn, has a crack in the plastic around the screen.

Software-

Office for Mac 2008 (Powerpoint,Excel,Word)

iLife (itunes,iphoto,imovie,iweb,etc.)

Adobe Photoshop C3

Fetch

Transmission

Some other freeware...

1.2 gHZ

512 MB DDR SDRAM

Mac OS X 10.4.11