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Happy Birthday, Alan.....!!!!!

Entering that into the calculator at this site, the answer is 0.07113888...

In scientific notation: moving the decimal point to the right two places:

7.11...x10^-2  

Move the decimal point so it ends after the first non-zero digit. If you move the decimal point to the right, the exponent will be negative; if you move the decimal point to the left, the exponent will be positive. The exponent is the number of places that you move the decimal point.

If by "3*sqrt(27)", you mean the cube root of 27, xvxvxv did it correctly.

However, if by"3*sqrt(27)", you mean 3√(27), then:

just do it son

To the nearest whole number: the choice is either 99 or 100:

Halfway between 99 and 100 is 99.50.

Since 99.46 is less than 99.50, 99.46 rounds down to 99.

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To the nearest tenth: the choice is either 99.4 or 99.5:

Halfway between 99.40 and 99.50 is 99.45

Since 99.46 is larger than 99.45, it rounds up to 99.50.

I don't know it could be 99 or 100

nonononononononononononononononnonononononononono. no.

sorry melody i hadnt seen your answer

im preparing them!or saving for tomorrow!

do it like this

409 7/9 divided by 4

409 x 9 + 7 / 9 ÷ 4/1

409 x 9 + 7 / 9 x 1/4

now solve this!if you cant tell me?

look here

Thank you for all your help Rosala.   Did you remember to bring the chocolates and the flowers ?

Alan's birthday is the 21st which is today for me but it is still tomorrow for you and for him. 

wow i didnt know its alans birthday!in that case happy birthday alan!

to remind melody...i helped in the cake baking and getting the streamers and stuff!

@@ End of Day Wrap    Fri 20/2/15     Sydney, Australia   Time 12:05 am   (Really Sat morning.)   ♪ ♫

Today our great answers were delivered by Geno3141, Sasini, CPhill, Hellokittygirl156, Rosala, gliu1, Alan, Badinage, InovativeProgrammer and Sorasyn.  A big thank you to each of you. 

I answered very few questions today.  I am away from home for a few days.  Sorry.  Most questions were answered but there are planty left for answerers to find if they look just a little.

Sat 21/2/15

4x + 12 ≥ 5x + 13 ?

$$\begin{array}{rcl}
4x+12 & \ge & 5x+13 \quad | \quad -4x \\
12 & \ge & -4x+5x+13 \\
12 & \ge & x + 13 \quad | \quad -13 \\
-13+12& \ge & x \\
-1 & \ge & x \\
x & \le & -1
\end{array}\\
\boxed{\ x \le -1\ } \quad \small{\text{ or }} \quad \textcolor[rgb]{1,0,0}{x < -1} \quad \small{\text{ and }} \quad \textcolor[rgb]{1,0,0}{ x = -1}$$

I have added this calc to our reference material stick note.  

Hit the [2nd]  button.

inverse sine is asin

square root of 8 = sqrt(8)

cube root of 8 = sqrt(8,3)

It cannot be simplified (although Badinage has factorized i correctly)

It can be put equal to whatever the problem that you are doing requires. :)

Maybe this will help

I expect it is just too big to display. 

Use atan  it is the same as inverse tan