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https://www.youtube.com/watch?v=fWz-RBgHfis

:)

Is it Multiple choice at all?

I wish I could help, But alas, I'm not very good with this. :(

I'm truely sorry!

To increase something by 1% multiply it by 1.01.

Just enter this as you have written it into the calculator.

Let x be the angle in degrees then:    x = 180-x + 25/3600  because an angle and its supplement sum to 180° and 25" = 25/3600 degrees

So:  2x =   90.0347°   or x = 90° 2' 5"

We are in the same time zone according to Google. Maybe it just malfunctioned.😜

You have found the distance of the image Omi, but the question asks for the height of the object.  There isn't enough information in the question to determine this (other than it will be 2.3 times smaller than the image!).

That's ok, I'm probably not gonna be on much today because of school😪. Darn tests!

         - Victoria 

8%/90=.002

98.00 - 60=38

38/98=38.78% Markup on selling price.

That looks great Omi 67    

This is the right side, sorry

https://phet.colorado.edu/de/simulation/legacy/geometric-optics

Look here

file:///C:/Users/Christel/AppData/Local/Temp/phet-geometric-optics/geometric-optics_de.html

Hallo guest, I hope is is ok so?

dont do it

the selling prices of an item is $520. After 6 months of not selling, it is marked down by 10%. After another 6 months of not selling, it is further marked down by 30%. Find the sale price after both markdown

100-10=90

90% of 520 = 0.9*520 = $468

100-30=70

70% of 468 = 0.7*468 = $327.60

Tues 5/1/16

1)  Hayley's back (Social centre of the world)

     http://web2.0calc.com/questions/how-is-everyone-this-fiinee-monday-morning-borning-monday

2)  Mathematics of a lens.    Thanks Omi67

     http://web2.0calc.com/questions/physics-homework_2

3)  Find the radius of a inxcribed circle    Thanks CPhill

      http://web2.0calc.com/questions/triangle-and-circle

4)  What is rotational symmetry?     Geno3141 and Melody

     http://web2.0calc.com/questions/which-letter-is-rotational-symetry

5)  How many toothpicks in the pyramid?

     http://web2.0calc.com/questions/toothpicks_1#r2

6)  A simple sequence to make you think :)     Thanks Alan and guests

     http://web2.0calc.com/questions/8-56-7-42-6-30-5-20-3

@@ What is Happening?  [Wrap4]   Mon 4/1/16   Sydney,  Australia Time 7:15 pm   ♪ ♫

Good evening, well it is for me anyway.  

It was quiet today but as always there were questions and answer to match.  Our consciencioud answerers were CPhilll, Solveit and Omi67  Thank you.   

Technical Issues:

How can you post a picture when the picture upload on the forum is not working properly ?

Thanks very much Alan for these instructions.

Chris just adked me to check his answer:  :)    

It all checks out A OK     

Another perhaps easier way to present it would be like this.

I believe that first interpretaton is the correct one, Melody....

log27(2x-1)=4/3

Do you mean

\(log_{27}(2x-1)=\frac{4}{3}\\ OR\\ log_{10}27(2x-1)=\frac{4}{3}\\ \)

I'm going tyo guess the first one

\(log_{27}(2x-1)=\frac{4}{3}\\ 27^{4/3}=2x-1\\ (27^{1/3})^4=2x-1\\ 3^4=2x-1\\ 81=2x-1\\ 82=2x\\ x=41 \)

FRED

or maybe Frederich.

OR if you are a girl it is more likely

Abigail Bronte Charlotte Dianne Evette Francine Gloria Holly Indigo Jan Kara Louise Mary Nora Olivia Pauline Quivette Ronda Suzie Tina Urga Viviene Willow Xalia Yasmine Zennah.

That is a pretty fancy name you have there !!!     

Y=3(2)^

This is meaningless - you have to have a number after the caret ( ^ )

No it is not proportional because if it was you would just have the multiplication coefficient you would not have any thing added afterwards.