Paula F

Calculate ln((a^2011)/(e^2011))

How on earth do I do that...

Thanks in advance!

Any ideas? Part 1 of the question asked me to draw the 2 enantiomers of 2-butanol but I have that part. Thanks in advance.

The radioactive isotope carbon-14 is present in small quantities in all life forms, and it is constantly replenished until the organism dies, after which it decays to stable carbon-12 at a rate proportional to the amount of carbon-14 present, with a half-life of 5588 years. Suppose is the amount of carbon-14 present at time t.

(a) Find the value of the constant k in the differential equation C'= -kC.

(b) In 1988 three teams of scientists found that the Shroud of Turin, which was reputed to be the burial cloth of Jesus, contained about 91 percent of the amount of carbon-14 contained in freshly made cloth of the same material[1]. How old is the Shroud of Turin, according to these data?

Age = ? years

A cup of coffee at 180 degrees is poured into a mug and left in a room at 73 degrees. After 1 minutes, the coffee is 130 degrees. Assume that the differential equation describing Newton's Law of Cooling is (in this case) dT/dt= k(T-73).

What is the temperature of the coffee after 11 minutes?

After how many minutes will the coffee be 100 degrees?

A bacteria culture starts with 900 bacteria and grows at a rate proportional to its size. After 5 hours, there are 5000 bacteria.

A. Find an expression for the number of bacteria after hours.

B. Find the number of bacteria after 6 hours.

C. Find the growth rate after 6 hours.

D. After how many hours will the population reach 30000?

The area of a wetland drops by 1/3 every 5 years. What percent of its total area disappears after 25 years?

A travel mug of 92 degree Celsius coffee is left on the roof of a parked car on a cold winters day. The temperature of coffee after t minutes is given by H=92(2)^(-t/11). After how many minutes will the coffee be lukewarm (30 degrees Celsius)?

t= ?

Find the exponential function f(x)=a^x whose graph goes through the point (2,4)

Thanks in advance. :)

An aqueous solution is 3.50 % by mass potassium bromide, KBr, and has a density of 1.02 g/mL.

http://webwork.nuigalway.ie/webwork2_files/tmp/equ...

Just looking to check my answers as the methods done.

(1)

If

f(x)= {x^2 if x<(or equal to)3

{mx+b if x >3

find the values of m and b that make f differentiable everywhere.

(2)

Find the derivative of the function

g(x)=(1x^2 -4x-1)e^x

g'(x)= ?

(3)

let f(x)=(x^2+8x+16)/(6x+24)

f'(5)=?

f''(5)= ?

(4)

Let f(x)= sin(x^5)

f'(x)=?

f'(1)=?

(5)

Let f(x)=2e^(xsinx)

f'(x)=?

(6)

Consider the function f(x)=2x^3+18x^2-162x+5, -9<(or equal to)x<(or equal to)4

Absolute minimum value?

Absolute maximum value?

(7)

Find the x coordinateof the absolute maximum for the function

f(x)=11x-5xln(x), x>0

(8)

Find an equation of the tangent line to the curve y=-1-2x-3x^2 at (1,-6)

y=?

(9)

Use implicit differentiation to find the slope of the tangent line to the curve 3x^2-3xy+3y^3=-192 at the point (-4,-4)

m=?

Thanks in advance

I am 15 years old, I am currently Roman Catholic. How would I go about changing. Please give me some Information on buddhism. Thanks.

I am 15 years old and I know, without a doubt that I will have a career in Reptiles. I would love to do what Steve Irwin did but where would I start? I really want to make a change in the world, please help! All answers greatly appreciated but if you have an insulting comment about Steve Irwin I'd prefer if you kept it to yourself,

Thanks

I am 15 years old. I live in Ireland and know more about reptiles than most other people. I have a passion for snake and lizards and Steve Irwin Is my idol. I seriously want to follow in his footsteps but with no snakes or lizards living in Ireland, is it impossible? I want to go to college when I leave school and I am pretty clever (not to boast). Please help me? What course can I do in college, would it be better for me to study in another country?

R.I.P. Steve Irwin

Thanks, all opinions welcome.

Best answer 10 points!

http://www.flickr.com/photos/31001676@N02/37819827...

This is an idea i have for my first tattoo whe im 18. I am 15 years old.Steve Irwin is my hero and i would love to pay tribute to him with a tattoo. also where would be the best place to put this, i want it around the same size as the palm of my hand (less the fingers!). Thanks alot.

Oh ya it wouldnt be exactly like this cos im crap at drawing!

I am a huge fan of tattoos.

It is a little bit red but she is not effected by it in any other way. I gave her a bath this morning, will that agitate it? She is still as hyper as ever. It kind of looks like dry skin, is that possible with a dog, i also spotted what looks like dandruff on her ears....if that helps at all!

Should i take her to the vet/ put on moisturiser/ other suggestions/

I have a single little tadpole, all on its own. i have no idea how to care for it at all! Please help this little dude grow into a healthy young frog!

Any hints,tips or ANYTHING!?

All help greatly appreciated and remember...10 points for best answer!

I do not believe a word of the bible and have been thinking about becoming Buddhist. what exactly is involved in the changing of religions and could you tell me all about buddhism. how do you think my parents will react....if i tell them?