ElectricPavlov

Let x = her age

x + 3  previous wives = 1/3 (69 + x)

x + 3 = 23 + 1/3 x

2/3 x = 20

x = her age = 30      

74 heads means there are 74 critters there (people and horses)

x = horses    4x = legs

74-x = people   2 (74-x) = people legs

assuming every person has 2 legs and every horse has 4 legs , the sum of the legs is 196

4x + 2(74-x) = 196

4x + 148- 2x = 196

2x = 48

x = horses = 24        74-24 = people = 50 people 

He started with his WHOLE allowance   or  9/9 of his allowance ans spent  4/9 ....subtract this from his whole allowance and you will get the fraction he saved:

9/9 - 4/9 = 5/9 saved

We are loking for 15.25% of x = $750

.1525 x = 750

750/.1525 = x = $ 4918.03 total sales

Recall the area of a triangle = 1/2 base x height

the area of the sheet from which the triangle area is subtracted is  l x w

so  l x w  - 1/2 base x height = remaining sheet area

36 x25 - 1/2 x12 x 15  = 810 sq inches

You cannot divide ANYTHING by zero...including itself...it i considered an error and is 'undefined'.

.....but I didn't get all of the possible answers.....just like I didn't finish that last post before hitting 'enter'     LOL  

Thanx for the heads up Chris.....I did check the results to be sure before I posted (this time)  !

You know gov't jobs have to go out to bid and usually wind up with union work and waste....LOL

Volume of a sphere is  4/3 pi r^3

4/3 pi (r^3) = 4.5

r^3 = (4.5 x 3/4 )/ pi

r^3 =1.07429586

r= 1.024176 units     (you didn't specify units in your question)