Melody

This is a great question!  I have assumed that outside the buiding is all grass. :)

Grassed area = 3/4 of the big circle + the quadrant of the little circle

$$\\grass =\frac{3}{4}\times \pi \times 7^2\;+\;\frac{1}{4}\pi\times 2^2\\\\
grass =\frac{151\pi}{4}\\\\
grass =\frac{151\pi}{4}\\\\
grass =118.6\;m^2\qquad$Correct to 1 decimal place$\\\\$$

If you have any questions just ask :))

You should know that 25% is one quarter.

$$\frac{1}{4}\times\frac{2}{3}=\frac{1\times 2}{4\times 3}=\frac{2}{12}=\frac{1}{6}$$

I often get stubborn about answering questions that are so poorly presented.  

I want to see all the question at once if it is possible and I hate scrolling.  Sorry. 

That is a big number :)

Do it on the calc on the home page :)

x+1*x^2+1

$$x+1*x^2+1=x+x^2+1=x^2+x+1$$

perhaps you really mean

(x+1)*(x^2+1)

$$\\(x+1)*(x^2+1)\\
=x(x^2+1)+1(x^2+1)\\
=x^3+x+x^2+1\\
=x^3+x^2+x+1$$

arc sine is the same as inverse sine  

15/100*5 minutes

then multiply by 60 to turn it into seconds  

Square roots are like brackets or like absolute signs.  You have to simplify what is under them first.  :)

D you mean $19.48 - $6343.00

That equals one big debt!

You can use the site calc on the home page if you want to work out how much you owe!