All Answers 358168 Answers

what is 0.0583x6.022x10^23=3.510826 X 100^22

1-Your brackets do not match!. Is the whole expression under the sqrt sign?

2-Do you know the answer?

3-This is what I got: 2sqrt(119/15-pi)=4.378009......etc.

Just google it!!!!!!!!!!!!!!.

I already responded to this but it obviously did not post properly.

Have a great weekend and I will see you later.  :))

I checked this thread every 10 minutes to see if you replied!!..

Yes I prefer Witbank, I still call it that.

anycase, I'm going of soon for my weekend...will catch you again sometime!!!

X*0.64=9

X=9/0.64

X=14.0625

Saseflower sent me this by private message to show me how the down arrow for the drop down edit menu is not always displayed for her.  Thanks Saseflower, I can see that what you say is correct :))

since they share no common factors, the least common multiple is 15*19=285

Thanks,

Well i looked that up so I know just a tiny bit more about your region than a dot on a page.  Emahlahlena, (meaning coal) that is actually a pretty name when I settled on how it might be pronounced.  Witbank is a lot easier to remember and spell though.  :)

https://www.google.com.au/maps/place/Witbank,+South+Africa/@-24.4268839,24.7728635,6z/data=!4m2!3m1!1s0x1eeae8d3974f9ce9:0xcf04138bd6fd111c

@@ What is Happening?  [Wrap4]    Fri 13/11/15   Sydney, Australia Time 11:02pm   ♪ ♫

Hi Everyone,

Today was busy, especially fo a Friday, although I suppose it was Thursday for many of you.    

This is a site that I really like if you want to see what I mean.  

12.64

Just move your numbers past the decimal, or one place value to your right.

Sydey...well at least I know what the dot of Sydney looks like on a map!!!..haha

Witbank, or the new african name is Emahlahleni..been here just over a year now...work at the Ridge casino..

Fri  13/11/15

1) Riddle     Thanks MWashington18       

http://web2.0calc.com/questions/i-have-a-riddle-i-weigh-a-lot-forward-in-washington-but-not-backwards-it-is-ton-because-ton-means-weight-and-backwards-is-not-it-s

2) Geometry questions by Mellie       Thanks CPhill

(Chris particularly noted the first question)   

The first one (a) got loads of attention from CPhill, Alan, Heureka and guest.   

a)   http://web2.0calc.com/questions/right-abc-has-ab-3-bc-4-and-ac-5-square-xyzw-is-inscribed-in-abc-with-x-and-y-on-ac-w-on-ab-and-z-on-bc-what-is-the-side-length-of-the-square

b)   http://web2.0calc.com/questions/find-the-length-of-the-shortest-altitude-of-a-triangle-with-side-lengths-10-24-26

c)   http://web2.0calc.com/questions/point-c-is-on-ac-such-that-ax-3cx-if-abc-bxa-90-then-what-is-bx

d)   http://web2.0calc.com/questions/in-pqr-we-have-p-30-q-60-r-90-point-x-is-on-pr-such-that-qx-bisects-pqr-if-pq-equals-12-then-what-is-the-area-of-pqx

3) Exponent equation         Thanks Alan, CPhill and guest   

http://web2.0calc.com/questions/4-2x-1-10-4-x-4-0#r3

4)  Understanding numbers and the pythagorean theorum. From Dabae      Thanks CPhill.

http://web2.0calc.com/questions/without-using-a-calculator-find-the-hypotenuse-of-a-right-triangle-that-has-legs-with-lengths-2-64-and-4-95

5)  This is an interesting little physics/maths questions.  CPhill and I are not 100% certain of the answer,

http://web2.0calc.com/questions/my-qestion

6) Simultaneous equation.    Thanks CPhill and Heureka

http://web2.0calc.com/questions/answer-this-please-now

7) Modular Arithemtic.      Repeat question. New answer from a guest.

 I have not had a chance to look at it yet. It is on my "to look" list.        Thanks guest.

http://web2.0calc.com/questions/43-p-mod-247-17#r6

I would have done the same thing Chris but I am not completely certain either.    

The area of a wound shrinks by 5% each day. How long will it take for the wound to shrink to 10% of its initial size?

0.9=1(0.95)^n

log0.9=log(0.95)^n

log0.9=n*log(0.95)

log0.9  /  log0.95=n

log(0.9)/log(0.95) = 2.0540797177456861    days

2.0540797177456861*24 = 49.2979132258964664   hour

0.2979132258964664*60 = 17.874793553787984

2 days  1 hour and 18 minutes to the nearest minute.       

The question is not worded very well but I think it means:

what will it be worth at the end of the 4th year AFTER the 5th deposit is made.

I am from Sydney, Australia.

What city are you from?

hi Melody,

Yes, you've guessed it!!..good ol' SA..

and you Melody?...

to come back to the question, uhm, just wondering...do you think the answer would be R3447.25?..it just seems a bit odd that someone would deposit such an amount 5 times...but then again, it's just a sum...

BUT there is something...as the last deposit was made at the end of the 5th year, don't you think we should add a year for this last investment to grow, so at the end of year 6 we actually, only then have R20 000?..

Not expecting you to brainstorm this anymore, you have helped already. I was only wondering about that?

Thanks Mellie,

this can then be simplified down to  

2p   +   1/2

Here is your time line.  5 deposits of   Y units each is made as shown  (I should have used x)

All times must be converted to months.

interest rate is  7.2% / 12 month = 0.6 % per month = 0.006 per month

i=0.006

1+i = 1.006

Now you have to look at what each of these will grow to independently and add them all together.

\(FV=Y*1.006^{48}+Y*1.006^{36}+Y*1.006^{24}+Y*1.006^{12}+Y*1.006^{0}\\ 20000=Y*1.006^{48}+Y*1.006^{36}+Y*1.006^{24}+Y*1.006^{12}+Y\\ 20000=Y(1.006^{48}+1.006^{36}+1.006^{24}+1.006^{12}+1)\\ 20000=Y*5.801723086\\ Y=20000\div5.801723086\\ Y=3447.25\; units\)

So each deposit is R 3447.25

I figure the R must stand for either Real (Brazil) or Rand (South Africa)

I am thinking Rand because you appear to have English as a primary language.

Are you from South Africa?     

Sorry Juriemagic,

I justr read your question for the 100th time only this time I read it properly and it does seem to make sense.

Hang on a bit and I will try to get you and answer.

Guest may be right, I have not looked at what guest has said and i have not done the question myself yet.

More to come.....   

Melody,

This is where my problem lies. a Hint is given to use a timeline. So what I did was draw the timeline, then used T0 as the "now", but also presuming its at the END of the year. Then comes end of year 1 (T1), (which is the end of the next year), at which time another investment is made. So, the first investment is now in the bank for a year, the second, only a day. BUT...this second investment counts for the first year of the 4 years, because the question is worded saying, "NOW, AND AT THE END OF EVERY YEAR FOR 4 YEARS"..so, I'm thinking the total years, is 5. BUT then, if an investment is made at the end of this (4th,5th) year, it really is also the end of the timeline, so this investment is not going to grow...

I agree, this question is way out of line!!!..so to speak. what do you think?

six years ago Albert was 1/5 as old as his mother. his mother is now 3 times as old as alert. how old is his mother?

\(\begin{array}{|l|r|r|} \hline & Albert(a) & Mother(x) \\ \hline \text{Now} & a & \quad (1) \quad x = 3a \\ -6\text{ years} & \quad (2) \quad a-6 = \frac15(x-6) & x -6 \\ \hline \end{array}\\ \begin{array}{lrcl} (1)& x &=& 3a \\ & a &=& \frac{x}{3} \\ \\ \hline \\ (2)& a-6 &=& \frac15 (x-6) \quad & | \quad a = \frac{x}{3}\\\\ & \frac{x}{3}-6 &=& \frac15 (x-6)\\\\ & \frac{x}{3}-6 &=& \frac{x}{5} - \frac{6}{5} \quad & | \quad -\frac{x}{5}\\\\ & \frac{x}{3}- \frac{x}{5}-6 &=& -\frac{6}{5}\\\\ & \frac{x}{3}- \frac{x}{5}-6 &=& -\frac{6}{5} \quad & | \quad +6 \\\\ & \frac{x}{3}- \frac{x}{5} &=& 6-\frac{6}{5} \\\\ & \frac{5x-3x}{15} &=& \frac{30-6}{5} \\\\ & \frac{2x}{15} &=& \frac{24}{5} \\\\ & \frac{2x}{15} &=& \frac{24}{5} \quad & | \quad :2 \\\\ & \frac{x}{15} &=& \frac{12}{5} \quad & | \quad \cdot 15 \\\\ & x &=& \frac{12\cdot 15}{5} \\\\ & x &=& 12\cdot 3 \\\\ & x &=& 36 \\\\ \end{array}\\ \text{His mother is } \mathbf{36} \text{ years old.}\\\\ \begin{array}{lrcl} \\ \hline \\ (1)& a &=& \frac{x}{3} \quad & | \quad x = 36\\\\ & a &=& \frac{36}{3} \\\\ & a &=& 12 \\\\ \end{array}\\ \text{Albert is } \mathbf{12} \text{ years old.} \)

TMga2yb  it is not an equation, it is an expression.  However, the meaning is still not clear. 

5x + 537x + 45y +t46 =?

what does t46 mean?

is it  

\(t^{46}\\ or\\ t\times 46\)