Apply you skills in math?

Question

1. A wall measures 3 m by 5.25 m. Allowing 1 gallon of paint for 30 m2 of surface, how many gallons of paint are needed to cover the wall w/ 2 coats of paint
2. Each year in the chinese calendar is named for 1 of the 12 animals. Every 12 years, the same animal is name. If 2002 is the year of the horse, how many years in the 20th century have been year of the horse
3. To calculate the height of a person, archeologist measure the lenghts of certain bones. 1 of the formulas use to determine the person's height in the cm given by
H = 61.421 + 2.31 F,
where F is the length of the femur of the thighbone.
The length of the femur of a 35-year-old woman measure 46.8 cm. find the height of the woman to the nearest hundredth of a m
4. a big water tank is to be filled w/ water. A full-tank requires 25 500 dm3. How many cubic m of water can fill the tank
5. the owner of a tract 10 000 ares sold 3856 ares to dike & sold 380 fewer ares than this to mike. how much land he stil have

Answer 1

1. 3*5.25*2/30 = 1.05 gallons. If paint only comes in gallon cans, you're going to have to buy two gallons, but you don't need much more than one.

2. Going back: 1990, '78, '66, '54, '42, '30, '18, '06 -- eight years of the horse in the 20th century. (And it doesn't matter whether you use the technically correct 1901-2000 or the commonly used 1900-1999.)

3. H = 61.421 + 2.31 F, F=46.8
H = 169.529 cm
H = 1.70m (it's 1.69529 which rounds up)

4. dm = decimeter, which is 1/10 of a meter. dm^3 is (1/10)^3 = (1/1,000) of a m^3.
So, 25,500 dm^3 = 25.5 m^3

5. 10000 - 3856 - (3856 - 380) = 2,668

Answer 2

1) 2
2) ?
3) 169.529cm
4) ?
5) 2668