ElectricPavlov

Thanx!  heureka....

T = temperature       x = hours    

each hour  the tem DROPS 4 degrees  ....this  equals  -4x     and you have a starting point of 35 to subtract FROM

so    T = 35 - 4x 

Melody answered this yesterday....I didn't realize it either, but was glad to know....

On the web2.0 calculator, if you get answer, then hit = again it will display in Sci Notation !     Cool!

One hour = 60 minutes   so use that for 't' in your calculations.

You have a RATE that changes with TIME, so you will need to do some calculus to get the answer.....are you doing calculus?   Or is this REALLY an AMOUNT of oil that has leaked at time 't' ????

Integrating your rate equation yields:    -1400e(-t/20)  + C    Ignoring the 'C'   and using   t = 60

    yields  69.7= 70  liters (rounded) have accumulated (leaked) in 1 hour

I used an online integral calculator for this answer....hope it was correct....hope this helps)

Since there is no compunding, this is pretty straightforward...simply multiply the decimal interest rate by the principle:

410,000 x .0385 =  $ 15,785.00 interest per year.

Hello Asinus   ... I just rounded a bit....BUT:

Avagadro's number = 6.022140857 × 10^23.

   so   4 x 6.022140857 x 10^23  = 24.088563428 x 10^23 atoms        LOL !!!

Each mole has Avagadro's number of atoms in it:  6.022 x 10^23     you have 4 moles

 4x 6.0223 =24.088 x 10^23  atoms

enter  1  x  4  x 10  then the x^y button  then enter your exponent  ....be careful to use parentehses if it is a fraction or other expression....

4.2 %  is 1.05% per period (3 months...or 'quarterly

(1+i)^4  =  1.0105)^4 = 1.042666      or    4.2666% annually

Yes they do add up    

x+y+z = 36 -84-6 = -54    CHECK!