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I did some research....pulled out the old Advanced Applied Mathematics CourseBook......not positive....but   FAIRLY sure that Riddler got it correct.    I will ask around....

~jc

The one where you need to tip your waiter and you do not know if you should tip on the total purchase or the total charge (which includes taxes) and whether it should be 15 ...or 20 % and it is dark in the restaraunt and you do not have your reading glasses....or your credit card.    Then you have to figure out if you are a faster runner than your waitress too.......  conundrum!

~jc   

It means you are going to fail miserably......Possibly....there is hope if you work hard and actually ask MATH questions on the MATH FORUM....Just sayin'

~jc

When I am introducing the entire Euler family in front of a crowd ?

Graph it on your dining room wall....go to the garage.....get the inclinator and measure it .    Well...that's what I would do w/out more information.

o/w   If you have the EQUATION of the line in the form of   y= mx + b      m is the slope......test it with your inclinator.....I dare ya !  ha

~jc

This is the most famous Euler identity: e^iπ=-1

Remember, that any prime greater than 5 can be written as the sum of two or more primes. There are infinitely many primes of the form: 4k+1.

Press "2nd" key first. Then you will see "asin", "acos" and "atan", which are the same as Sin^-1, Cos^-1 and Tan^-1.

how do you get sin-1 cos-1 or tan-1 on a sciantific calucator

On the web2.0calc you press

[2nd]  [acos] number

That is for cos of course.

inverse cos is the same as arc cos.   That is why :))

on other calcs it may be

[shift or second]  [cos-1] number

Bravo!!. I would give you 10 stars if only I knew how to do that!!!!!!.

True. I worked as an "Investments Banker"!!!.

how do I find the slope of a line

What information do you have?

Yes of course I can    

effective annual rate = 5.62976%

Are you the ex-banker guy?

Where is my five stars from you?

The "Reimann Hypothesis"!.

Yes Riddler it was a play on words     

See the little #6 on you post?  press the little down arrow next to it and you will see a drop down menu with edit in it.

Press on edit and off you go. :)

Easy Peazy :)

Say you buy a car, normally its value will 'decay' or depreciate

Say it costs $20,000 and the price mininshes by 8% every year. 8% = 0.08

then

at the end of the first year it will be worth      20000(1 - 0.08)^1

at the end of the second year it will be worth 20000(1-0.08)^2

at the end of the nth       year it will be worth 20000(1-0.08)^n

OR

if you invest money in the bank you expect it to grow or appreciate in value

Say you invest $20000 and the price appreciates by a set 4% each year  4%=0.04

at the end of the first year it will be worth      20000(1 + 0.04)^1

at the end of the second year it will be worth 20000(1+0.04)^2

at the end of the nth       year it will be worth 20000(1+0.04)^n

Excellent Melody!. Five stars from me. Do you think you can figure out the annual rate of return on his "annuity"? Thanks for great effort.

A customer walks into a Bank with $100,000. He wishes to buy 5 CD's (Cetificates of Deposit) for 5 years as follows:

The questions: a-How much must he deposit in each CD, that ALL 5 CD's will have exactly the same amount at maturity, thereby, effectively receiving 5 equal-amount annuity payments for his initial deposit of $100,000. b- What would the effective annual rate of return on his "annuity" be for the 5 years? Good luck to all.

1-year CD that pays 3% compounded semi-annually.     $22,811.55

2-year CD that pays 4% .............................................    $21,711.32

3-year CD that pays 5%..............................................    $20,264.86

4-year CD that pays 6%..............................................    $18,551.93

5-year CD that pays 7%..............................................    $16,660.32

The customer can pocket the other 2c

Yearly 'annuity' = $23,501.03

1+2=3 

This in all regards is the hardest math problem i have ever seen

How do you edit comments and questions and such

Generally speaking, a quantity that's growing increases with time, and a quantity that's decaying decreases with time.

I don't understand your question.

2.1 x 4.5 = 9.45

There is one decimal place in the first multiplier and one in the second and you add them together so there are two in the product

2.1 x 0.45 = 0.945

(1) +   (2)  =   (3)

2.1 x 45 = 94.5

(1) + (0) =  (1)

hope I helped!

You have made a great table there. :)

It is a pity you have not asked any maths questions :)

What does what maen.  LOL   :)

I feel like someone just really didn't want to do their algebra homewrok

One. Why would Jack share his chips??????